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Safety and Pharmacokinetic Study of EMBEDA in Children Ages 7-17 With Pain

AN OPEN-LABEL STUDY TO EVALUATE THE SAFETY AND PHARMACOKINETICS OF PF-06412528 IN CHILDREN 7-17 YEARS FOR THE TREATMENT OF MODERATE-TO-SEVERE PAIN

Status
Terminated
Phases
Phase 4
Study type
Interventional
Source
ClinicalTrials.gov
Registry ID
NCT02101554
Enrollment
19
Registered
2014-04-02
Start date
2015-04-24
Completion date
2019-06-26
Last updated
2020-07-10

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Moderate-severe Pain

Keywords

Pediatric, pain indication, controlled release morphine

Brief summary

Safety and pharmacokinetics of an abuse-deterrent, extended-release formulation of morphine sulfate with a sequestered naltrexone core in children 7-17 with moderate-severe pain.

Detailed description

Subjects, once stabilized to Embeda, need only complete a minimum of 2 of the 6 week study duration to satisfy the PK endpoint. A safety follow-up visit is required at 1 week post-last dose.

Interventions

DRUGAges 7-11

Oral/Capsule, once per day or twice per day dosing; Treatment duration consists of a 1 to 4 week Conversion/Titration Phase leading to a 2 to 6 week Maintenance Treatment duration.

DRUGages 12-17

Oral/Capsule, once per day or twice per day dosing; Treatment duration consists of a 1 to 4 week Conversion/Titration Phase leading to a 2 to 6 week Maintenance Treatment duration.

Sponsors

Pfizer
Lead SponsorINDUSTRY

Study design

Primary purpose
TREATMENT
Masking
NONE

Eligibility

Sex/Gender
ALL
Age
7 Years to 17 Years
Healthy volunteers
No

Inclusion criteria

* Children 7-17 with moderate to severe pain requiring around the clock treatment with an opioid analgesic. * Be an experienced opioid user, defined as any subject treated with opioid therapy, equivalent or equal to \>20 mg per day of morphine, for a period of 3 consecutive days immediately prior to first day of dosing.

Exclusion criteria

* Columbia-Suicide Severity Rating Scale (C-SSRS) for suicidal ideation and behavior in past year. * Hypersensitivity to morphine, naltrexone. * A life expectancy (assessed by investigator) of less than 6 months or is no longer capable of taking medication orally. * Undergone surgery within 3 days prior to the first day of dosing.

Design outcomes

Primary

MeasureTime frameDescription
Number of Participants With Clinical Opiate Withdrawal Scale (COWS) at Early Termination Before Week 10Early Termination before Week 10 (anytime between Week 5 to Week 10)COWS is a clinician-administered instrument, to assess participants' clinical opiate withdrawal level. The scale ranges from 0 (none symptoms) to 48 (severe symptoms), higher score = more severe withdrawal. Scores category: 0 to 4 = none to minimal, 5 to 12 = mild, 13 to 24 = moderate, 25 to 36 = moderately severe withdrawal and 37 to 48 = severe withdrawal. Participants experiencing a COWS score greater than equal to (\>=) 13 is treated for opiate withdrawal signs and symptoms according to the investigator's medical judgment. In this outcome measure, participants as per COWS score categories are reported. Only those COWS categories are presented which had at least 1 participant for any reporting arm.
Number of Participants With Clinical Opiate Withdrawal Scale (COWS) at Day 1 of Week 5Day 1 of Week 5COWS is a clinician-administered instrument, to assess participants' clinical opiate withdrawal level. The scale ranges from 0 (none symptoms) to 48 (severe symptoms), higher score = more severe withdrawal. Scores category: 0 to 4 = none to minimal, 5 to 12 = mild, 13 to 24 = moderate, 25 to 36 = moderately severe withdrawal and 37 to 48 = severe withdrawal. Participants experiencing a COWS score greater than equal to (\>=) 13 is treated for opiate withdrawal signs and symptoms according to the investigator's medical judgment. In this outcome measure, participants as per COWS score categories are reported. Only those COWS categories are presented which had at least 1 participant for any reporting arm.
Number of Participants With Clinical Opiate Withdrawal Scale (COWS) at Week 6Week 6COWS is a clinician-administered instrument, to assess participants' clinical opiate withdrawal level. The scale ranges from 0 (none symptoms) to 48 (severe symptoms), higher score = more severe withdrawal. Scores category: 0 to 4 = none to minimal, 5 to 12 = mild, 13 to 24 = moderate, 25 to 36 = moderately severe withdrawal and 37 to 48 = severe withdrawal. Participants experiencing a COWS score greater than equal to (\>=) 13 is treated for opiate withdrawal signs and symptoms according to the investigator's medical judgment. In this outcome measure, participants as per COWS score categories are reported. Only those COWS categories are presented which had at least 1 participant for any reporting arm.
Number of Participants With Clinical Opiate Withdrawal Scale (COWS) at Week 8Week 8COWS is a clinician-administered instrument, to assess participants' clinical opiate withdrawal level. The scale ranges from 0 (none symptoms) to 48 (severe symptoms), higher score = more severe withdrawal. Scores category: 0 to 4 = none to minimal, 5 to 12 = mild, 13 to 24 = moderate, 25 to 36 = moderately severe withdrawal and 37 to 48 = severe withdrawal. Participants experiencing a COWS score greater than equal to (\>=) 13 is treated for opiate withdrawal signs and symptoms according to the investigator's medical judgment. In this outcome measure, participants as per COWS score categories are reported. Only those COWS categories are presented which had at least 1 participant for any reporting arm.
Number of Participants With Clinical Opiate Withdrawal Scale (COWS) at Week 10Week 10COWS is a clinician-administered instrument, to assess participants' clinical opiate withdrawal level. The scale ranges from 0 (none symptoms) to 48 (severe symptoms), higher score = more severe withdrawal. Scores category: 0 to 4 = none to minimal, 5 to 12 = mild, 13 to 24 = moderate, 25 to 36 = moderately severe withdrawal and 37 to 48 = severe withdrawal. Participants experiencing a COWS score greater than equal to (\>=) 13 is treated for opiate withdrawal signs and symptoms according to the investigator's medical judgment. In this outcome measure, participants as per COWS score categories are reported. Only those COWS categories are presented which had at least 1 participant for any reporting arm.
Apparent Oral Clearance (CL/F) of PF-06412528Anytime post-dose on Visit 4 (Week 4)Clearance of a drug is a measure of the rate at which a drug is metabolized or eliminated by normal biological processes.
Average Concentration at Steady-state (Css, av) of PF-06412528Anytime post-dose on Visit 4 (Week 4)Css, av was defines as the average steady state concentration of a drug (steady state has been achieved when the rate of drug administration and the rate of drug elimination are equal).
Number of Participants With Treatment Emergent Adverse Events (AEs) and Serious Adverse Events (SAEs): Week 1 to Week 4Week 1 to Week 4An AE was any untoward medical occurrence in a participant who received study treatment without regard to possibility of causal relationship. SAE was an AE resulting in any of the following outcomes or deemed significant for any other reason: death, initial or prolonged inpatient hospitalization, life-threatening experience (immediate risk of dying), persistent or significant disability or incapacity, congenital anomaly. A treatment emergent AE was defined as an event that emerged during the treatment period that was absent before treatment, or worsened during the treatment period relative to the pretreatment state. AEs included both serious and non-serious adverse events.
Number of Participants With Treatment Emergent Adverse Events (AEs) and Serious Adverse Events (SAEs): Week 5 to Week 10Week 5 to Week 10An AE was any untoward medical occurrence in a participant who received study treatment without regard to possibility of causal relationship. SAE was an AE resulting in any of the following outcomes or deemed significant for any other reason: death, initial or prolonged inpatient hospitalization, life-threatening experience (immediate risk of dying), persistent or significant disability or incapacity, congenital anomaly. A treatment emergent AE was defined as an event that emerged during the treatment period that was absent before treatment, or worsened during the treatment period relative to the pretreatment state. AEs included both serious and non-serious adverse events.
Number of Participants With Treatment Emergent Adverse Events According to Severity: Week 1 to Week 4Week 1 to Week 4An adverse event was any untoward medical occurrence in a participant who received study drug without regard to possibility of causal relationship. AE was assessed according to severity; mild (does not interfere with participant's usual function), moderate (interferes to some extent with participant's usual function) and severe (interferes significantly with participant's usual function).A treatment emergent AE was defined as an event that emerged during the treatment period that was absent before treatment, or worsened during the treatment period relative to the pretreatment state. AEs included both serious and non-serious adverse events.
Number of Participants With Treatment Emergent Adverse Events According to Severity: Week 5 to Week 10Week 5 to Week 10An adverse event was any untoward medical occurrence in a participant who received study drug without regard to possibility of causal relationship. AE was assessed according to severity; mild (does not interfere with participant's usual function), moderate (interferes to some extent with participant's usual function) and severe (interferes significantly with participant's usual function). A treatment emergent AE was defined as an event that emerged during the treatment period that was absent before treatment, or worsened during the treatment period relative to the pretreatment state. AEs included both serious and non-serious adverse events.
Number of Participants With Treatment Emergent Treatment Related Adverse Events: Week 1 to Week 4Week 1 to Week 4An AE was any untoward medical occurrence attributed to study drug in a participant who received study drug. A treatment emergent AE was defined as an event that emerged during the treatment period that was absent before treatment, or worsened during the treatment period relative to the pretreatment state. Relatedness to PF-06412528 was assessed by the investigator.
Number of Participants With Treatment Emergent Treatment Related Adverse Events: Week 5 to Week 10Week 5 to Week 10An AE was any untoward medical occurrence attributed to study drug in a participant who received study drug. A treatment emergent AE was defined as an event that emerged during the treatment period that was absent before treatment, or worsened during the treatment period relative to the pretreatment state. Relatedness to PF-06412528 was assessed by the investigator.
Number of Participants With Clinical Opiate Withdrawal Scale (COWS) at Screening Before Day 1At Screening (2 weeks before Day 1 of study)COWS is a clinician-administered instrument, to assess participants' clinical opiate withdrawal level. The scale ranges from 0 (none symptoms) to 48 (severe symptoms), higher score = more severe withdrawal. Scores category: 0 to 4 = none to minimal, 5 to 12 = mild, 13 to 24 = moderate, 25 to 36 = moderately severe withdrawal and 37 to 48 = severe withdrawal. Participants experiencing a COWS score greater than equal to (\>=) 13 is treated for opiate withdrawal signs and symptoms according to the investigator's medical judgment. In this outcome measure, participants as per COWS score categories are reported. Only those COWS categories are presented which had at least 1 participant for any reporting arm.
Number of Participants With Clinical Opiate Withdrawal Scale (COWS) at Day 1Day 1 (Pre-dose)COWS is a clinician-administered instrument, to assess participants' clinical opiate withdrawal level. The scale ranges from 0 (none symptoms) to 48 (severe symptoms), higher score = more severe withdrawal. Scores category: 0 to 4 = none to minimal, 5 to 12 = mild, 13 to 24 = moderate, 25 to 36 = moderately severe withdrawal and 37 to 48 = severe withdrawal. Participants experiencing a COWS score greater than equal to (\>=) 13 is treated for opiate withdrawal signs and symptoms according to the investigator's medical judgment. In this outcome measure, participants as per COWS score categories are reported. Only those COWS categories are presented which had at least 1 participant for any reporting arm.
Number of Participants With Clinical Opiate Withdrawal Scale (COWS) at Week 1Week 1COWS is a clinician-administered instrument, to assess participants' clinical opiate withdrawal level. The scale ranges from 0 (none symptoms) to 48 (severe symptoms), higher score = more severe withdrawal. Scores category: 0 to 4 = none to minimal, 5 to 12 = mild, 13 to 24 = moderate, 25 to 36 = moderately severe withdrawal and 37 to 48 = severe withdrawal. Participants experiencing a COWS score greater than equal to (\>=) 13 is treated for opiate withdrawal signs and symptoms according to the investigator's medical judgment. In this outcome measure, participants as per COWS score categories are reported. Only those COWS categories are presented which had at least 1 participant for any reporting arm.
Number of Participants With Clinical Opiate Withdrawal Scale (COWS) at Week 2Week 2COWS is a clinician-administered instrument, to assess participants' clinical opiate withdrawal level. The scale ranges from 0 (none symptoms) to 48 (severe symptoms), higher score = more severe withdrawal. Scores category: 0 to 4 = none to minimal, 5 to 12 = mild, 13 to 24 = moderate, 25 to 36 = moderately severe withdrawal and 37 to 48 = severe withdrawal. Participants experiencing a COWS score greater than equal to (\>=) 13 is treated for opiate withdrawal signs and symptoms according to the investigator's medical judgment. In this outcome measure, participants as per COWS score categories are reported. Only those COWS categories are presented which had at least 1 participant for any reporting arm.
Number of Participants With Clinical Opiate Withdrawal Scale (COWS) at Week 3Week 3COWS is a clinician-administered instrument, to assess participants' clinical opiate withdrawal level. The scale ranges from 0 (none symptoms) to 48 (severe symptoms), higher score = more severe withdrawal. Scores category: 0 to 4 = none to minimal, 5 to 12 = mild, 13 to 24 = moderate, 25 to 36 = moderately severe withdrawal and 37 to 48 = severe withdrawal. Participants experiencing a COWS score greater than equal to (\>=) 13 is treated for opiate withdrawal signs and symptoms according to the investigator's medical judgment. In this outcome measure, participants as per COWS score categories are reported. Only those COWS categories are presented which had at least 1 participant for any reporting arm.
Number of Participants With Clinical Opiate Withdrawal Scale (COWS) at Week 4Week 4COWS is a clinician-administered instrument, to assess participants' clinical opiate withdrawal level. The scale ranges from 0 (none symptoms) to 48 (severe symptoms), higher score = more severe withdrawal. Scores category: 0 to 4 = none to minimal, 5 to 12 = mild, 13 to 24 = moderate, 25 to 36 = moderately severe withdrawal and 37 to 48 = severe withdrawal. Participants experiencing a COWS score greater than equal to (\>=) 13 is treated for opiate withdrawal signs and symptoms according to the investigator's medical judgment. In this outcome measure, participants as per COWS score categories are reported. Only those COWS categories are presented which had at least 1 participant for any reporting arm.
Number of Participants With Clinical Opiate Withdrawal Scale (COWS) at Early Termination Before Week 4Early Termination before Week 4 (anytime between Week 1 to Week 4)COWS is a clinician-administered instrument, to assess participants' clinical opiate withdrawal level. The scale ranges from 0 (none symptoms) to 48 (severe symptoms), higher score = more severe withdrawal. Scores category: 0 to 4 = none to minimal, 5 to 12 = mild, 13 to 24 = moderate, 25 to 36 = moderately severe withdrawal and 37 to 48 = severe withdrawal. Participants experiencing a COWS score greater than equal to (\>=) 13 is treated for opiate withdrawal signs and symptoms according to the investigator's medical judgment. In this outcome measure, participants as per COWS score categories are reported. Only those COWS categories are presented which had at least 1 participant for any reporting arm.
Number of Participants With Clinical Opiate Withdrawal Scale (COWS) at Screening on Week 5Screening before treatment started at Week 5COWS is a clinician-administered instrument, to assess participants' clinical opiate withdrawal level. The scale ranges from 0 (none symptoms) to 48 (severe symptoms), higher score = more severe withdrawal. Scores category: 0 to 4 = none to minimal, 5 to 12 = mild, 13 to 24 = moderate, 25 to 36 = moderately severe withdrawal and 37 to 48 = severe withdrawal. Participants experiencing a COWS score greater than equal to (\>=) 13 is treated for opiate withdrawal signs and symptoms according to the investigator's medical judgment. In this outcome measure, participants as per COWS score categories are reported. Only those COWS categories are presented which had at least 1 participant for any reporting arm.

Secondary

MeasureTime frameDescription
Number of Participants With Laboratory Test AbnormalitiesWeek 1 up to Week 10Laboratory parameters included: hematology (hemoglobin: \<0.8\*LLN, hematocrit: \<0.8\*LLN, red blood cell: \<0.8\* LLN, platelet \<0.5\*LLN; \>1.75\*ULN and white blood cell count \<0.6\*LLN, neutrophils \<0.8\* LLN, eosinophils \>1.2\*ULN, monocytes \>1.2\*ULN, basophils \>1.2\*ULN and lymphocytes \<0.8\* LLN), chemistry (blood urea nitrogen \>1.3\*ULN, creatinine\>1.3\*ULN, sodium \<0.95\*LLN, potassium \<0.9\*LLN, \>1.1\*ULN, aspartate aminotransferase \>3.0\*ULN, alanine aminotransferase \>3.0\*ULN, total bilirubin \>1.5\*ULN, alkaline phosphatase \>3.0\*ULN, albumin \<0.8\*LLN, total protein\<0.8\*LLN, \>1.2\*ULN, Albumin \<0.8\*LLN, Blood Urea Nitrogen \>1.3\*ULN, Creatinine \>1.3\*ULN, HDL Cholesterol \<0.8\*LLN, Chloride \<0.9\*LLN, Phosphate \<0.8\*LLN, Bicarbonate \<0.9\*LLN, Glucose \<0.6\*LLN, Creatine Kinase \>2.0\*ULN, Urobilinogen \>=1) and urinalysis (specific gravity \<1.003, pH \<4.5 urine glucose \>=1, ketones \>=1 urine protein \>=1, urine bilirubin \>=1, nitrite \>=1, urine leukocytes \>=20).
Apparent Volume of Distribution (Vz/F) of PF-06412528Anytime post-dose on Visit 4 (Week 4)Volume of distribution is defined as the theoretical volume in which the total amount of drug would need to be uniformly distributed to produce the desired plasma concentration of a drug. Apparent volume of distribution after oral dose (Vz/F) is influenced by the fraction absorbed.
Dose-Exposure Relationship of Metabolites of Morphine, Naltrexone and 6-β-NaltrexolAnytime post-dose on Visit 4 (Week 4)
Number of Participants With Pre-defined Criteria of Vital SignsWeek 1 up to Week 10Pre-defined criteria of vital signs included supine diastolic blood pressure (DBP) change from baseline greater than or equal to (\>=) 20 millimeter of mercury (mmHg): increase and decrease; supine systolic blood pressure (SBP) change from baseline \>=30 mmHg: increase and decrease.

Countries

United States

Participant flow

Participants by arm

ArmCount
PF-06412528 <=20 mg
Participants were converted from their pre-study standard of care opioid analgesic to PF-06412528; PF-06412528 oral dose was titrated and stabilized to less than or equal to (\<=) 20 milligram (mg) daily, up to a maximum of 4 weeks. Participants continued to receive stabilized PF-06412528 \<=20 mg oral daily dose up to a maximum of additional 6 weeks.
6
PF-06412528 >20-40 mg
Participants were converted from their pre-study standard of care opioid analgesic to PF-06412528; PF-06412528 oral dose was titrated and stabilized to greater than (\>) 20 mg to 40 mg daily, up to a maximum of 4 weeks. Participants continued to receive stabilized PF-06412528 \>20 mg to 40 mg oral daily dose up to a maximum of additional 6 weeks.
10
PF-06412528 >40-80 mg
Participants were converted from their pre-study standard of care opioid analgesic to PF-06412528; PF-06412528 oral dose was titrated and stabilized to \>40 mg to 80 mg daily, up to a maximum of 4 weeks. Participants continued to receive stabilized PF-06412528 \>40 mg to 80 mg oral daily dose up to a maximum of additional 6 weeks.
3
Total19

Withdrawals & dropouts

PeriodReasonFG000FG001FG002
Overall StudyAdverse Event211
Overall StudyInsufficient Clinical Response020
Overall StudyLost to Follow-up010
Overall StudyProtocol Violation010
Overall StudyWithdrawl by Parents/Guardians100

Baseline characteristics

CharacteristicPF-06412528 <=20 mgPF-06412528 >20-40 mgPF-06412528 >40-80 mgTotal
Age, Continuous14.3 years
STANDARD_DEVIATION 2.34
15.0 years
STANDARD_DEVIATION 1.33
15.3 years
STANDARD_DEVIATION 1.53
14.8 years
STANDARD_DEVIATION 1.68
Ethnicity (NIH/OMB)
Hispanic or Latino
4 Participants4 Participants0 Participants8 Participants
Ethnicity (NIH/OMB)
Not Hispanic or Latino
2 Participants6 Participants3 Participants11 Participants
Ethnicity (NIH/OMB)
Unknown or Not Reported
0 Participants0 Participants0 Participants0 Participants
Race (NIH/OMB)
American Indian or Alaska Native
0 Participants0 Participants0 Participants0 Participants
Race (NIH/OMB)
Asian
0 Participants0 Participants0 Participants0 Participants
Race (NIH/OMB)
Black or African American
2 Participants2 Participants2 Participants6 Participants
Race (NIH/OMB)
More than one race
1 Participants1 Participants0 Participants2 Participants
Race (NIH/OMB)
Native Hawaiian or Other Pacific Islander
0 Participants0 Participants0 Participants0 Participants
Race (NIH/OMB)
Unknown or Not Reported
0 Participants0 Participants0 Participants0 Participants
Race (NIH/OMB)
White
3 Participants7 Participants1 Participants11 Participants
Sex: Female, Male
Female
3 Participants7 Participants3 Participants13 Participants
Sex: Female, Male
Male
3 Participants3 Participants0 Participants6 Participants

Adverse events

Event typeEG000
affected / at risk
EG001
affected / at risk
EG002
affected / at risk
deaths
Total, all-cause mortality
0 / 60 / 100 / 3
other
Total, other adverse events
5 / 69 / 103 / 3
serious
Total, serious adverse events
2 / 62 / 102 / 3

Outcome results

Primary

Apparent Oral Clearance (CL/F) of PF-06412528

Clearance of a drug is a measure of the rate at which a drug is metabolized or eliminated by normal biological processes.

Time frame: Anytime post-dose on Visit 4 (Week 4)

Population: Data for this outcome measure was not collected, as there were insufficient pharmacokinetic samples due to early termination of the study by the sponsor.

Primary

Average Concentration at Steady-state (Css, av) of PF-06412528

Css, av was defines as the average steady state concentration of a drug (steady state has been achieved when the rate of drug administration and the rate of drug elimination are equal).

Time frame: Anytime post-dose on Visit 4 (Week 4)

Population: Data for this outcome measure was not collected, as there were insufficient pharmacokinetic samples due to early termination of the study by the sponsor.

Primary

Number of Participants With Clinical Opiate Withdrawal Scale (COWS) at Day 1

COWS is a clinician-administered instrument, to assess participants' clinical opiate withdrawal level. The scale ranges from 0 (none symptoms) to 48 (severe symptoms), higher score = more severe withdrawal. Scores category: 0 to 4 = none to minimal, 5 to 12 = mild, 13 to 24 = moderate, 25 to 36 = moderately severe withdrawal and 37 to 48 = severe withdrawal. Participants experiencing a COWS score greater than equal to (\>=) 13 is treated for opiate withdrawal signs and symptoms according to the investigator's medical judgment. In this outcome measure, participants as per COWS score categories are reported. Only those COWS categories are presented which had at least 1 participant for any reporting arm.

Time frame: Day 1 (Pre-dose)

Population: Analysis population included all participants who were screened and had received at least 1 dose of PF-06412528 from Week 1 to Week 4.

ArmMeasureCategoryValue (COUNT_OF_PARTICIPANTS)
PF-06412528 <=20 mgNumber of Participants With Clinical Opiate Withdrawal Scale (COWS) at Day 1COWS Score < 56 Participants
PF-06412528 <=20 mgNumber of Participants With Clinical Opiate Withdrawal Scale (COWS) at Day 1Mild (COWS Score 5-12)0 Participants
PF-06412528 >20-40 mgNumber of Participants With Clinical Opiate Withdrawal Scale (COWS) at Day 1COWS Score < 59 Participants
PF-06412528 >20-40 mgNumber of Participants With Clinical Opiate Withdrawal Scale (COWS) at Day 1Mild (COWS Score 5-12)1 Participants
PF-06412528 >40-80 mgNumber of Participants With Clinical Opiate Withdrawal Scale (COWS) at Day 1Mild (COWS Score 5-12)0 Participants
PF-06412528 >40-80 mgNumber of Participants With Clinical Opiate Withdrawal Scale (COWS) at Day 1COWS Score < 53 Participants
Primary

Number of Participants With Clinical Opiate Withdrawal Scale (COWS) at Day 1 of Week 5

COWS is a clinician-administered instrument, to assess participants' clinical opiate withdrawal level. The scale ranges from 0 (none symptoms) to 48 (severe symptoms), higher score = more severe withdrawal. Scores category: 0 to 4 = none to minimal, 5 to 12 = mild, 13 to 24 = moderate, 25 to 36 = moderately severe withdrawal and 37 to 48 = severe withdrawal. Participants experiencing a COWS score greater than equal to (\>=) 13 is treated for opiate withdrawal signs and symptoms according to the investigator's medical judgment. In this outcome measure, participants as per COWS score categories are reported. Only those COWS categories are presented which had at least 1 participant for any reporting arm.

Time frame: Day 1 of Week 5

Population: Analysis population included all participants who were screened and had received at least 1 dose of PF-06412528 from Week 5 to Week 10.

ArmMeasureCategoryValue (COUNT_OF_PARTICIPANTS)
PF-06412528 <=20 mgNumber of Participants With Clinical Opiate Withdrawal Scale (COWS) at Day 1 of Week 5COWS Score <54 Participants
PF-06412528 <=20 mgNumber of Participants With Clinical Opiate Withdrawal Scale (COWS) at Day 1 of Week 5Mild (COWS Score 5-12)0 Participants
PF-06412528 >20-40 mgNumber of Participants With Clinical Opiate Withdrawal Scale (COWS) at Day 1 of Week 5COWS Score <57 Participants
PF-06412528 >20-40 mgNumber of Participants With Clinical Opiate Withdrawal Scale (COWS) at Day 1 of Week 5Mild (COWS Score 5-12)1 Participants
PF-06412528 >40-80 mgNumber of Participants With Clinical Opiate Withdrawal Scale (COWS) at Day 1 of Week 5COWS Score <52 Participants
PF-06412528 >40-80 mgNumber of Participants With Clinical Opiate Withdrawal Scale (COWS) at Day 1 of Week 5Mild (COWS Score 5-12)0 Participants
Primary

Number of Participants With Clinical Opiate Withdrawal Scale (COWS) at Early Termination Before Week 10

COWS is a clinician-administered instrument, to assess participants' clinical opiate withdrawal level. The scale ranges from 0 (none symptoms) to 48 (severe symptoms), higher score = more severe withdrawal. Scores category: 0 to 4 = none to minimal, 5 to 12 = mild, 13 to 24 = moderate, 25 to 36 = moderately severe withdrawal and 37 to 48 = severe withdrawal. Participants experiencing a COWS score greater than equal to (\>=) 13 is treated for opiate withdrawal signs and symptoms according to the investigator's medical judgment. In this outcome measure, participants as per COWS score categories are reported. Only those COWS categories are presented which had at least 1 participant for any reporting arm.

Time frame: Early Termination before Week 10 (anytime between Week 5 to Week 10)

Population: Analysis population included all participants who were screened and had received at least 1 dose of PF-06412528 from Week 5 to Week 10.

ArmMeasureCategoryValue (COUNT_OF_PARTICIPANTS)
PF-06412528 <=20 mgNumber of Participants With Clinical Opiate Withdrawal Scale (COWS) at Early Termination Before Week 10Mild (COWS Score 5-12)0 Participants
PF-06412528 <=20 mgNumber of Participants With Clinical Opiate Withdrawal Scale (COWS) at Early Termination Before Week 10COWS Score <53 Participants
PF-06412528 <=20 mgNumber of Participants With Clinical Opiate Withdrawal Scale (COWS) at Early Termination Before Week 10Missing1 Participants
PF-06412528 >20-40 mgNumber of Participants With Clinical Opiate Withdrawal Scale (COWS) at Early Termination Before Week 10Mild (COWS Score 5-12)1 Participants
PF-06412528 >20-40 mgNumber of Participants With Clinical Opiate Withdrawal Scale (COWS) at Early Termination Before Week 10COWS Score <56 Participants
PF-06412528 >20-40 mgNumber of Participants With Clinical Opiate Withdrawal Scale (COWS) at Early Termination Before Week 10Missing1 Participants
PF-06412528 >40-80 mgNumber of Participants With Clinical Opiate Withdrawal Scale (COWS) at Early Termination Before Week 10COWS Score <51 Participants
PF-06412528 >40-80 mgNumber of Participants With Clinical Opiate Withdrawal Scale (COWS) at Early Termination Before Week 10Missing0 Participants
PF-06412528 >40-80 mgNumber of Participants With Clinical Opiate Withdrawal Scale (COWS) at Early Termination Before Week 10Mild (COWS Score 5-12)1 Participants
Primary

Number of Participants With Clinical Opiate Withdrawal Scale (COWS) at Early Termination Before Week 4

COWS is a clinician-administered instrument, to assess participants' clinical opiate withdrawal level. The scale ranges from 0 (none symptoms) to 48 (severe symptoms), higher score = more severe withdrawal. Scores category: 0 to 4 = none to minimal, 5 to 12 = mild, 13 to 24 = moderate, 25 to 36 = moderately severe withdrawal and 37 to 48 = severe withdrawal. Participants experiencing a COWS score greater than equal to (\>=) 13 is treated for opiate withdrawal signs and symptoms according to the investigator's medical judgment. In this outcome measure, participants as per COWS score categories are reported. Only those COWS categories are presented which had at least 1 participant for any reporting arm.

Time frame: Early Termination before Week 4 (anytime between Week 1 to Week 4)

Population: Analysis population included all participants who were screened and had received at least 1 dose of PF-06412528 from Week 1 to Week 4.

ArmMeasureCategoryValue (COUNT_OF_PARTICIPANTS)
PF-06412528 <=20 mgNumber of Participants With Clinical Opiate Withdrawal Scale (COWS) at Early Termination Before Week 4COWS Score <52 Participants
PF-06412528 <=20 mgNumber of Participants With Clinical Opiate Withdrawal Scale (COWS) at Early Termination Before Week 4Missing4 Participants
PF-06412528 >20-40 mgNumber of Participants With Clinical Opiate Withdrawal Scale (COWS) at Early Termination Before Week 4COWS Score <52 Participants
PF-06412528 >20-40 mgNumber of Participants With Clinical Opiate Withdrawal Scale (COWS) at Early Termination Before Week 4Missing8 Participants
PF-06412528 >40-80 mgNumber of Participants With Clinical Opiate Withdrawal Scale (COWS) at Early Termination Before Week 4COWS Score <51 Participants
PF-06412528 >40-80 mgNumber of Participants With Clinical Opiate Withdrawal Scale (COWS) at Early Termination Before Week 4Missing2 Participants
Primary

Number of Participants With Clinical Opiate Withdrawal Scale (COWS) at Screening Before Day 1

COWS is a clinician-administered instrument, to assess participants' clinical opiate withdrawal level. The scale ranges from 0 (none symptoms) to 48 (severe symptoms), higher score = more severe withdrawal. Scores category: 0 to 4 = none to minimal, 5 to 12 = mild, 13 to 24 = moderate, 25 to 36 = moderately severe withdrawal and 37 to 48 = severe withdrawal. Participants experiencing a COWS score greater than equal to (\>=) 13 is treated for opiate withdrawal signs and symptoms according to the investigator's medical judgment. In this outcome measure, participants as per COWS score categories are reported. Only those COWS categories are presented which had at least 1 participant for any reporting arm.

Time frame: At Screening (2 weeks before Day 1 of study)

Population: Analysis population included all participants who were screened and had received at least 1 dose of PF-06412528 from Week 1 to Week 4.

ArmMeasureCategoryValue (COUNT_OF_PARTICIPANTS)
PF-06412528 <=20 mgNumber of Participants With Clinical Opiate Withdrawal Scale (COWS) at Screening Before Day 1COWS Score < 56 Participants
PF-06412528 <=20 mgNumber of Participants With Clinical Opiate Withdrawal Scale (COWS) at Screening Before Day 1Mild (COWS Score 5-12)0 Participants
PF-06412528 >20-40 mgNumber of Participants With Clinical Opiate Withdrawal Scale (COWS) at Screening Before Day 1COWS Score < 59 Participants
PF-06412528 >20-40 mgNumber of Participants With Clinical Opiate Withdrawal Scale (COWS) at Screening Before Day 1Mild (COWS Score 5-12)1 Participants
PF-06412528 >40-80 mgNumber of Participants With Clinical Opiate Withdrawal Scale (COWS) at Screening Before Day 1COWS Score < 53 Participants
PF-06412528 >40-80 mgNumber of Participants With Clinical Opiate Withdrawal Scale (COWS) at Screening Before Day 1Mild (COWS Score 5-12)0 Participants
Primary

Number of Participants With Clinical Opiate Withdrawal Scale (COWS) at Screening on Week 5

COWS is a clinician-administered instrument, to assess participants' clinical opiate withdrawal level. The scale ranges from 0 (none symptoms) to 48 (severe symptoms), higher score = more severe withdrawal. Scores category: 0 to 4 = none to minimal, 5 to 12 = mild, 13 to 24 = moderate, 25 to 36 = moderately severe withdrawal and 37 to 48 = severe withdrawal. Participants experiencing a COWS score greater than equal to (\>=) 13 is treated for opiate withdrawal signs and symptoms according to the investigator's medical judgment. In this outcome measure, participants as per COWS score categories are reported. Only those COWS categories are presented which had at least 1 participant for any reporting arm.

Time frame: Screening before treatment started at Week 5

Population: Analysis population included all participants who were screened and had received at least 1 dose of PF-06412528 from Week 5 to Week 10.

ArmMeasureValue (COUNT_OF_PARTICIPANTS)
PF-06412528 <=20 mgNumber of Participants With Clinical Opiate Withdrawal Scale (COWS) at Screening on Week 54 Participants
PF-06412528 >20-40 mgNumber of Participants With Clinical Opiate Withdrawal Scale (COWS) at Screening on Week 58 Participants
PF-06412528 >40-80 mgNumber of Participants With Clinical Opiate Withdrawal Scale (COWS) at Screening on Week 52 Participants
Primary

Number of Participants With Clinical Opiate Withdrawal Scale (COWS) at Week 1

COWS is a clinician-administered instrument, to assess participants' clinical opiate withdrawal level. The scale ranges from 0 (none symptoms) to 48 (severe symptoms), higher score = more severe withdrawal. Scores category: 0 to 4 = none to minimal, 5 to 12 = mild, 13 to 24 = moderate, 25 to 36 = moderately severe withdrawal and 37 to 48 = severe withdrawal. Participants experiencing a COWS score greater than equal to (\>=) 13 is treated for opiate withdrawal signs and symptoms according to the investigator's medical judgment. In this outcome measure, participants as per COWS score categories are reported. Only those COWS categories are presented which had at least 1 participant for any reporting arm.

Time frame: Week 1

Population: Analysis population included all participants who were screened and had received at least 1 dose of PF-06412528 from Week 1 to Week 4.

ArmMeasureCategoryValue (COUNT_OF_PARTICIPANTS)
PF-06412528 <=20 mgNumber of Participants With Clinical Opiate Withdrawal Scale (COWS) at Week 1Missing0 Participants
PF-06412528 <=20 mgNumber of Participants With Clinical Opiate Withdrawal Scale (COWS) at Week 1COWS Score < 56 Participants
PF-06412528 <=20 mgNumber of Participants With Clinical Opiate Withdrawal Scale (COWS) at Week 1Mild (COWS Score 5-12)0 Participants
PF-06412528 >20-40 mgNumber of Participants With Clinical Opiate Withdrawal Scale (COWS) at Week 1COWS Score < 58 Participants
PF-06412528 >20-40 mgNumber of Participants With Clinical Opiate Withdrawal Scale (COWS) at Week 1Mild (COWS Score 5-12)1 Participants
PF-06412528 >20-40 mgNumber of Participants With Clinical Opiate Withdrawal Scale (COWS) at Week 1Missing1 Participants
PF-06412528 >40-80 mgNumber of Participants With Clinical Opiate Withdrawal Scale (COWS) at Week 1COWS Score < 53 Participants
PF-06412528 >40-80 mgNumber of Participants With Clinical Opiate Withdrawal Scale (COWS) at Week 1Mild (COWS Score 5-12)0 Participants
PF-06412528 >40-80 mgNumber of Participants With Clinical Opiate Withdrawal Scale (COWS) at Week 1Missing0 Participants
Primary

Number of Participants With Clinical Opiate Withdrawal Scale (COWS) at Week 10

COWS is a clinician-administered instrument, to assess participants' clinical opiate withdrawal level. The scale ranges from 0 (none symptoms) to 48 (severe symptoms), higher score = more severe withdrawal. Scores category: 0 to 4 = none to minimal, 5 to 12 = mild, 13 to 24 = moderate, 25 to 36 = moderately severe withdrawal and 37 to 48 = severe withdrawal. Participants experiencing a COWS score greater than equal to (\>=) 13 is treated for opiate withdrawal signs and symptoms according to the investigator's medical judgment. In this outcome measure, participants as per COWS score categories are reported. Only those COWS categories are presented which had at least 1 participant for any reporting arm.

Time frame: Week 10

Population: Analysis population: all participants who were screened and received at least 1 dose of PF-06412528 from Week 5-10. Overall number of participants analyzed=0 for arm PF-06412528 \>40-80 mg as no participants were evaluable for this outcome measure at Week 10.

ArmMeasureCategoryValue (COUNT_OF_PARTICIPANTS)
PF-06412528 >20-40 mgNumber of Participants With Clinical Opiate Withdrawal Scale (COWS) at Week 10COWS Score <51 Participants
PF-06412528 >20-40 mgNumber of Participants With Clinical Opiate Withdrawal Scale (COWS) at Week 10Missing7 Participants
Primary

Number of Participants With Clinical Opiate Withdrawal Scale (COWS) at Week 2

COWS is a clinician-administered instrument, to assess participants' clinical opiate withdrawal level. The scale ranges from 0 (none symptoms) to 48 (severe symptoms), higher score = more severe withdrawal. Scores category: 0 to 4 = none to minimal, 5 to 12 = mild, 13 to 24 = moderate, 25 to 36 = moderately severe withdrawal and 37 to 48 = severe withdrawal. Participants experiencing a COWS score greater than equal to (\>=) 13 is treated for opiate withdrawal signs and symptoms according to the investigator's medical judgment. In this outcome measure, participants as per COWS score categories are reported. Only those COWS categories are presented which had at least 1 participant for any reporting arm.

Time frame: Week 2

Population: Analysis population included all participants who were screened and had received at least 1 dose of PF-06412528 from Week 1 to Week 4. Overall number of participants analyzed=0 for arm PF-06412528 \>40-80 mg as no participants were evaluable for this outcome measure at Week 2.

ArmMeasureCategoryValue (COUNT_OF_PARTICIPANTS)
PF-06412528 <=20 mgNumber of Participants With Clinical Opiate Withdrawal Scale (COWS) at Week 2COWS Score < 51 Participants
PF-06412528 <=20 mgNumber of Participants With Clinical Opiate Withdrawal Scale (COWS) at Week 2Missing5 Participants
PF-06412528 >20-40 mgNumber of Participants With Clinical Opiate Withdrawal Scale (COWS) at Week 2COWS Score < 59 Participants
PF-06412528 >20-40 mgNumber of Participants With Clinical Opiate Withdrawal Scale (COWS) at Week 2Missing1 Participants
Primary

Number of Participants With Clinical Opiate Withdrawal Scale (COWS) at Week 3

COWS is a clinician-administered instrument, to assess participants' clinical opiate withdrawal level. The scale ranges from 0 (none symptoms) to 48 (severe symptoms), higher score = more severe withdrawal. Scores category: 0 to 4 = none to minimal, 5 to 12 = mild, 13 to 24 = moderate, 25 to 36 = moderately severe withdrawal and 37 to 48 = severe withdrawal. Participants experiencing a COWS score greater than equal to (\>=) 13 is treated for opiate withdrawal signs and symptoms according to the investigator's medical judgment. In this outcome measure, participants as per COWS score categories are reported. Only those COWS categories are presented which had at least 1 participant for any reporting arm.

Time frame: Week 3

Population: Analysis population: all participants who were screened and had received at least 1 dose of PF-06412528 from Week 1-4. Overall number of participants analyzed=0 for arm PF-06412528 \>40-80 mg as no participants were evaluable for this outcome measure at Week 3.

ArmMeasureCategoryValue (COUNT_OF_PARTICIPANTS)
PF-06412528 <=20 mgNumber of Participants With Clinical Opiate Withdrawal Scale (COWS) at Week 3COWS Score <51 Participants
PF-06412528 <=20 mgNumber of Participants With Clinical Opiate Withdrawal Scale (COWS) at Week 3Missing5 Participants
PF-06412528 >20-40 mgNumber of Participants With Clinical Opiate Withdrawal Scale (COWS) at Week 3Missing7 Participants
PF-06412528 >20-40 mgNumber of Participants With Clinical Opiate Withdrawal Scale (COWS) at Week 3COWS Score <53 Participants
Primary

Number of Participants With Clinical Opiate Withdrawal Scale (COWS) at Week 4

COWS is a clinician-administered instrument, to assess participants' clinical opiate withdrawal level. The scale ranges from 0 (none symptoms) to 48 (severe symptoms), higher score = more severe withdrawal. Scores category: 0 to 4 = none to minimal, 5 to 12 = mild, 13 to 24 = moderate, 25 to 36 = moderately severe withdrawal and 37 to 48 = severe withdrawal. Participants experiencing a COWS score greater than equal to (\>=) 13 is treated for opiate withdrawal signs and symptoms according to the investigator's medical judgment. In this outcome measure, participants as per COWS score categories are reported. Only those COWS categories are presented which had at least 1 participant for any reporting arm.

Time frame: Week 4

Population: Analysis population: all participants who were screened and received at least 1 dose of PF-06412528 from Week 1-4. Overall number of participants analyzed=0 for arm PF-06412528 \<=20 mg and PF-06412528 \>40-80 mg as no participants were evaluable for this outcome measure at Week 4.

ArmMeasureCategoryValue (COUNT_OF_PARTICIPANTS)
PF-06412528 >20-40 mgNumber of Participants With Clinical Opiate Withdrawal Scale (COWS) at Week 4COWS Score <52 Participants
PF-06412528 >20-40 mgNumber of Participants With Clinical Opiate Withdrawal Scale (COWS) at Week 4Missing8 Participants
Primary

Number of Participants With Clinical Opiate Withdrawal Scale (COWS) at Week 6

COWS is a clinician-administered instrument, to assess participants' clinical opiate withdrawal level. The scale ranges from 0 (none symptoms) to 48 (severe symptoms), higher score = more severe withdrawal. Scores category: 0 to 4 = none to minimal, 5 to 12 = mild, 13 to 24 = moderate, 25 to 36 = moderately severe withdrawal and 37 to 48 = severe withdrawal. Participants experiencing a COWS score greater than equal to (\>=) 13 is treated for opiate withdrawal signs and symptoms according to the investigator's medical judgment. In this outcome measure, participants as per COWS score categories are reported. Only those COWS categories are presented which had at least 1 participant for any reporting arm.

Time frame: Week 6

Population: Analysis population included all participants who were screened and had received at least 1 dose of PF-06412528 from Week 5 to Week 10.

ArmMeasureCategoryValue (COUNT_OF_PARTICIPANTS)
PF-06412528 <=20 mgNumber of Participants With Clinical Opiate Withdrawal Scale (COWS) at Week 6COWS Score <54 Participants
PF-06412528 <=20 mgNumber of Participants With Clinical Opiate Withdrawal Scale (COWS) at Week 6Mild (COWS Score 5-12)0 Participants
PF-06412528 >20-40 mgNumber of Participants With Clinical Opiate Withdrawal Scale (COWS) at Week 6COWS Score <57 Participants
PF-06412528 >20-40 mgNumber of Participants With Clinical Opiate Withdrawal Scale (COWS) at Week 6Mild (COWS Score 5-12)1 Participants
PF-06412528 >40-80 mgNumber of Participants With Clinical Opiate Withdrawal Scale (COWS) at Week 6COWS Score <52 Participants
PF-06412528 >40-80 mgNumber of Participants With Clinical Opiate Withdrawal Scale (COWS) at Week 6Mild (COWS Score 5-12)0 Participants
Primary

Number of Participants With Clinical Opiate Withdrawal Scale (COWS) at Week 8

COWS is a clinician-administered instrument, to assess participants' clinical opiate withdrawal level. The scale ranges from 0 (none symptoms) to 48 (severe symptoms), higher score = more severe withdrawal. Scores category: 0 to 4 = none to minimal, 5 to 12 = mild, 13 to 24 = moderate, 25 to 36 = moderately severe withdrawal and 37 to 48 = severe withdrawal. Participants experiencing a COWS score greater than equal to (\>=) 13 is treated for opiate withdrawal signs and symptoms according to the investigator's medical judgment. In this outcome measure, participants as per COWS score categories are reported. Only those COWS categories are presented which had at least 1 participant for any reporting arm.

Time frame: Week 8

Population: Analysis population included all participants who were screened and had received at least 1 dose of PF-06412528 from Week 5 to Week 10.

ArmMeasureCategoryValue (COUNT_OF_PARTICIPANTS)
PF-06412528 <=20 mgNumber of Participants With Clinical Opiate Withdrawal Scale (COWS) at Week 8Mild (COWS Score 5-12)0 Participants
PF-06412528 <=20 mgNumber of Participants With Clinical Opiate Withdrawal Scale (COWS) at Week 8COWS Score <53 Participants
PF-06412528 <=20 mgNumber of Participants With Clinical Opiate Withdrawal Scale (COWS) at Week 8Missing1 Participants
PF-06412528 >20-40 mgNumber of Participants With Clinical Opiate Withdrawal Scale (COWS) at Week 8Mild (COWS Score 5-12)0 Participants
PF-06412528 >20-40 mgNumber of Participants With Clinical Opiate Withdrawal Scale (COWS) at Week 8COWS Score <57 Participants
PF-06412528 >20-40 mgNumber of Participants With Clinical Opiate Withdrawal Scale (COWS) at Week 8Missing1 Participants
PF-06412528 >40-80 mgNumber of Participants With Clinical Opiate Withdrawal Scale (COWS) at Week 8COWS Score <51 Participants
PF-06412528 >40-80 mgNumber of Participants With Clinical Opiate Withdrawal Scale (COWS) at Week 8Missing0 Participants
PF-06412528 >40-80 mgNumber of Participants With Clinical Opiate Withdrawal Scale (COWS) at Week 8Mild (COWS Score 5-12)1 Participants
Primary

Number of Participants With Treatment Emergent Adverse Events According to Severity: Week 1 to Week 4

An adverse event was any untoward medical occurrence in a participant who received study drug without regard to possibility of causal relationship. AE was assessed according to severity; mild (does not interfere with participant's usual function), moderate (interferes to some extent with participant's usual function) and severe (interferes significantly with participant's usual function).A treatment emergent AE was defined as an event that emerged during the treatment period that was absent before treatment, or worsened during the treatment period relative to the pretreatment state. AEs included both serious and non-serious adverse events.

Time frame: Week 1 to Week 4

Population: Analysis population included all participants who were screened and had received at least 1 dose of PF-06412528 from Week 1 to Week 4.

ArmMeasureGroupValue (COUNT_OF_PARTICIPANTS)
PF-06412528 <=20 mgNumber of Participants With Treatment Emergent Adverse Events According to Severity: Week 1 to Week 4Moderate0 Participants
PF-06412528 <=20 mgNumber of Participants With Treatment Emergent Adverse Events According to Severity: Week 1 to Week 4Mild1 Participants
PF-06412528 <=20 mgNumber of Participants With Treatment Emergent Adverse Events According to Severity: Week 1 to Week 4Severe3 Participants
PF-06412528 >20-40 mgNumber of Participants With Treatment Emergent Adverse Events According to Severity: Week 1 to Week 4Moderate3 Participants
PF-06412528 >20-40 mgNumber of Participants With Treatment Emergent Adverse Events According to Severity: Week 1 to Week 4Mild4 Participants
PF-06412528 >20-40 mgNumber of Participants With Treatment Emergent Adverse Events According to Severity: Week 1 to Week 4Severe2 Participants
PF-06412528 >40-80 mgNumber of Participants With Treatment Emergent Adverse Events According to Severity: Week 1 to Week 4Mild2 Participants
PF-06412528 >40-80 mgNumber of Participants With Treatment Emergent Adverse Events According to Severity: Week 1 to Week 4Severe1 Participants
PF-06412528 >40-80 mgNumber of Participants With Treatment Emergent Adverse Events According to Severity: Week 1 to Week 4Moderate0 Participants
Primary

Number of Participants With Treatment Emergent Adverse Events According to Severity: Week 5 to Week 10

An adverse event was any untoward medical occurrence in a participant who received study drug without regard to possibility of causal relationship. AE was assessed according to severity; mild (does not interfere with participant's usual function), moderate (interferes to some extent with participant's usual function) and severe (interferes significantly with participant's usual function). A treatment emergent AE was defined as an event that emerged during the treatment period that was absent before treatment, or worsened during the treatment period relative to the pretreatment state. AEs included both serious and non-serious adverse events.

Time frame: Week 5 to Week 10

Population: Analysis population included all participants who were screened and had received at least 1 dose of PF-06412528 from Week 5 to Week 10.

ArmMeasureGroupValue (COUNT_OF_PARTICIPANTS)
PF-06412528 <=20 mgNumber of Participants With Treatment Emergent Adverse Events According to Severity: Week 5 to Week 10Moderate1 Participants
PF-06412528 <=20 mgNumber of Participants With Treatment Emergent Adverse Events According to Severity: Week 5 to Week 10Mild1 Participants
PF-06412528 <=20 mgNumber of Participants With Treatment Emergent Adverse Events According to Severity: Week 5 to Week 10Severe1 Participants
PF-06412528 >20-40 mgNumber of Participants With Treatment Emergent Adverse Events According to Severity: Week 5 to Week 10Moderate2 Participants
PF-06412528 >20-40 mgNumber of Participants With Treatment Emergent Adverse Events According to Severity: Week 5 to Week 10Mild3 Participants
PF-06412528 >20-40 mgNumber of Participants With Treatment Emergent Adverse Events According to Severity: Week 5 to Week 10Severe2 Participants
PF-06412528 >40-80 mgNumber of Participants With Treatment Emergent Adverse Events According to Severity: Week 5 to Week 10Mild0 Participants
PF-06412528 >40-80 mgNumber of Participants With Treatment Emergent Adverse Events According to Severity: Week 5 to Week 10Severe2 Participants
PF-06412528 >40-80 mgNumber of Participants With Treatment Emergent Adverse Events According to Severity: Week 5 to Week 10Moderate0 Participants
Primary

Number of Participants With Treatment Emergent Adverse Events (AEs) and Serious Adverse Events (SAEs): Week 1 to Week 4

An AE was any untoward medical occurrence in a participant who received study treatment without regard to possibility of causal relationship. SAE was an AE resulting in any of the following outcomes or deemed significant for any other reason: death, initial or prolonged inpatient hospitalization, life-threatening experience (immediate risk of dying), persistent or significant disability or incapacity, congenital anomaly. A treatment emergent AE was defined as an event that emerged during the treatment period that was absent before treatment, or worsened during the treatment period relative to the pretreatment state. AEs included both serious and non-serious adverse events.

Time frame: Week 1 to Week 4

Population: Analysis population included all participants who were screened and had received at least 1 dose of PF-06412528 from Week 1 to Week 4.

ArmMeasureGroupValue (COUNT_OF_PARTICIPANTS)
PF-06412528 <=20 mgNumber of Participants With Treatment Emergent Adverse Events (AEs) and Serious Adverse Events (SAEs): Week 1 to Week 4AEs4 Participants
PF-06412528 <=20 mgNumber of Participants With Treatment Emergent Adverse Events (AEs) and Serious Adverse Events (SAEs): Week 1 to Week 4SAEs1 Participants
PF-06412528 >20-40 mgNumber of Participants With Treatment Emergent Adverse Events (AEs) and Serious Adverse Events (SAEs): Week 1 to Week 4AEs9 Participants
PF-06412528 >20-40 mgNumber of Participants With Treatment Emergent Adverse Events (AEs) and Serious Adverse Events (SAEs): Week 1 to Week 4SAEs1 Participants
PF-06412528 >40-80 mgNumber of Participants With Treatment Emergent Adverse Events (AEs) and Serious Adverse Events (SAEs): Week 1 to Week 4AEs3 Participants
PF-06412528 >40-80 mgNumber of Participants With Treatment Emergent Adverse Events (AEs) and Serious Adverse Events (SAEs): Week 1 to Week 4SAEs1 Participants
Primary

Number of Participants With Treatment Emergent Adverse Events (AEs) and Serious Adverse Events (SAEs): Week 5 to Week 10

An AE was any untoward medical occurrence in a participant who received study treatment without regard to possibility of causal relationship. SAE was an AE resulting in any of the following outcomes or deemed significant for any other reason: death, initial or prolonged inpatient hospitalization, life-threatening experience (immediate risk of dying), persistent or significant disability or incapacity, congenital anomaly. A treatment emergent AE was defined as an event that emerged during the treatment period that was absent before treatment, or worsened during the treatment period relative to the pretreatment state. AEs included both serious and non-serious adverse events.

Time frame: Week 5 to Week 10

Population: Analysis population included all participants who were screened and had received at least 1 dose of PF-06412528 from Week 5 to Week 10.

ArmMeasureGroupValue (COUNT_OF_PARTICIPANTS)
PF-06412528 <=20 mgNumber of Participants With Treatment Emergent Adverse Events (AEs) and Serious Adverse Events (SAEs): Week 5 to Week 10AEs3 Participants
PF-06412528 <=20 mgNumber of Participants With Treatment Emergent Adverse Events (AEs) and Serious Adverse Events (SAEs): Week 5 to Week 10SAEs1 Participants
PF-06412528 >20-40 mgNumber of Participants With Treatment Emergent Adverse Events (AEs) and Serious Adverse Events (SAEs): Week 5 to Week 10AEs7 Participants
PF-06412528 >20-40 mgNumber of Participants With Treatment Emergent Adverse Events (AEs) and Serious Adverse Events (SAEs): Week 5 to Week 10SAEs2 Participants
PF-06412528 >40-80 mgNumber of Participants With Treatment Emergent Adverse Events (AEs) and Serious Adverse Events (SAEs): Week 5 to Week 10AEs2 Participants
PF-06412528 >40-80 mgNumber of Participants With Treatment Emergent Adverse Events (AEs) and Serious Adverse Events (SAEs): Week 5 to Week 10SAEs1 Participants
Primary

Number of Participants With Treatment Emergent Treatment Related Adverse Events: Week 1 to Week 4

An AE was any untoward medical occurrence attributed to study drug in a participant who received study drug. A treatment emergent AE was defined as an event that emerged during the treatment period that was absent before treatment, or worsened during the treatment period relative to the pretreatment state. Relatedness to PF-06412528 was assessed by the investigator.

Time frame: Week 1 to Week 4

Population: Analysis population included all participants who were screened and had received at least 1 dose of PF-06412528 from Week 1 to Week 4.

ArmMeasureValue (COUNT_OF_PARTICIPANTS)
PF-06412528 <=20 mgNumber of Participants With Treatment Emergent Treatment Related Adverse Events: Week 1 to Week 42 Participants
PF-06412528 >20-40 mgNumber of Participants With Treatment Emergent Treatment Related Adverse Events: Week 1 to Week 44 Participants
PF-06412528 >40-80 mgNumber of Participants With Treatment Emergent Treatment Related Adverse Events: Week 1 to Week 40 Participants
Primary

Number of Participants With Treatment Emergent Treatment Related Adverse Events: Week 5 to Week 10

An AE was any untoward medical occurrence attributed to study drug in a participant who received study drug. A treatment emergent AE was defined as an event that emerged during the treatment period that was absent before treatment, or worsened during the treatment period relative to the pretreatment state. Relatedness to PF-06412528 was assessed by the investigator.

Time frame: Week 5 to Week 10

Population: Analysis population included all participants who were screened and had received at least 1 dose of PF-06412528 from Week 5 to Week 10.

ArmMeasureValue (COUNT_OF_PARTICIPANTS)
PF-06412528 <=20 mgNumber of Participants With Treatment Emergent Treatment Related Adverse Events: Week 5 to Week 102 Participants
PF-06412528 >20-40 mgNumber of Participants With Treatment Emergent Treatment Related Adverse Events: Week 5 to Week 104 Participants
PF-06412528 >40-80 mgNumber of Participants With Treatment Emergent Treatment Related Adverse Events: Week 5 to Week 101 Participants
Secondary

Apparent Volume of Distribution (Vz/F) of PF-06412528

Volume of distribution is defined as the theoretical volume in which the total amount of drug would need to be uniformly distributed to produce the desired plasma concentration of a drug. Apparent volume of distribution after oral dose (Vz/F) is influenced by the fraction absorbed.

Time frame: Anytime post-dose on Visit 4 (Week 4)

Population: Data for this outcome measure was not collected, as there were insufficient pharmacokinetic samples due to early termination of the study by the sponsor.

Secondary

Dose-Exposure Relationship of Metabolites of Morphine, Naltrexone and 6-β-Naltrexol

Time frame: Anytime post-dose on Visit 4 (Week 4)

Population: Data for this outcome measure was not collected, as there were insufficient pharmacokinetic samples due to early termination of the study by the sponsor.

Secondary

Number of Participants With Laboratory Test Abnormalities

Laboratory parameters included: hematology (hemoglobin: \<0.8\*LLN, hematocrit: \<0.8\*LLN, red blood cell: \<0.8\* LLN, platelet \<0.5\*LLN; \>1.75\*ULN and white blood cell count \<0.6\*LLN, neutrophils \<0.8\* LLN, eosinophils \>1.2\*ULN, monocytes \>1.2\*ULN, basophils \>1.2\*ULN and lymphocytes \<0.8\* LLN), chemistry (blood urea nitrogen \>1.3\*ULN, creatinine\>1.3\*ULN, sodium \<0.95\*LLN, potassium \<0.9\*LLN, \>1.1\*ULN, aspartate aminotransferase \>3.0\*ULN, alanine aminotransferase \>3.0\*ULN, total bilirubin \>1.5\*ULN, alkaline phosphatase \>3.0\*ULN, albumin \<0.8\*LLN, total protein\<0.8\*LLN, \>1.2\*ULN, Albumin \<0.8\*LLN, Blood Urea Nitrogen \>1.3\*ULN, Creatinine \>1.3\*ULN, HDL Cholesterol \<0.8\*LLN, Chloride \<0.9\*LLN, Phosphate \<0.8\*LLN, Bicarbonate \<0.9\*LLN, Glucose \<0.6\*LLN, Creatine Kinase \>2.0\*ULN, Urobilinogen \>=1) and urinalysis (specific gravity \<1.003, pH \<4.5 urine glucose \>=1, ketones \>=1 urine protein \>=1, urine bilirubin \>=1, nitrite \>=1, urine leukocytes \>=20).

Time frame: Week 1 up to Week 10

Population: Analysis population included all participants who were screened and had received at least 1 dose of PF-06412528 in the study and evaluated for laboratory abnormalities.

ArmMeasureValue (COUNT_OF_PARTICIPANTS)
PF-06412528 <=20 mgNumber of Participants With Laboratory Test Abnormalities3 Participants
PF-06412528 >20-40 mgNumber of Participants With Laboratory Test Abnormalities7 Participants
PF-06412528 >40-80 mgNumber of Participants With Laboratory Test Abnormalities3 Participants
Secondary

Number of Participants With Pre-defined Criteria of Vital Signs

Pre-defined criteria of vital signs included supine diastolic blood pressure (DBP) change from baseline greater than or equal to (\>=) 20 millimeter of mercury (mmHg): increase and decrease; supine systolic blood pressure (SBP) change from baseline \>=30 mmHg: increase and decrease.

Time frame: Week 1 up to Week 10

Population: Analysis population included all participants who were screened and had received at least 1 dose of PF-06412528 in the study.

ArmMeasureGroupValue (COUNT_OF_PARTICIPANTS)
PF-06412528 <=20 mgNumber of Participants With Pre-defined Criteria of Vital SignsSupine DBP: Change >= 20 mmHg increase0 Participants
PF-06412528 <=20 mgNumber of Participants With Pre-defined Criteria of Vital SignsSupine DBP: Change >= 20 mmHg decrease1 Participants
PF-06412528 <=20 mgNumber of Participants With Pre-defined Criteria of Vital SignsSupine SBP: Change >= 30mmHg increase1 Participants
PF-06412528 <=20 mgNumber of Participants With Pre-defined Criteria of Vital SignsSupine SBP: Change >= 30 mmHg decrease0 Participants
PF-06412528 >20-40 mgNumber of Participants With Pre-defined Criteria of Vital SignsSupine SBP: Change >= 30 mmHg decrease0 Participants
PF-06412528 >20-40 mgNumber of Participants With Pre-defined Criteria of Vital SignsSupine DBP: Change >= 20 mmHg increase2 Participants
PF-06412528 >20-40 mgNumber of Participants With Pre-defined Criteria of Vital SignsSupine SBP: Change >= 30mmHg increase0 Participants
PF-06412528 >20-40 mgNumber of Participants With Pre-defined Criteria of Vital SignsSupine DBP: Change >= 20 mmHg decrease1 Participants
PF-06412528 >40-80 mgNumber of Participants With Pre-defined Criteria of Vital SignsSupine SBP: Change >= 30 mmHg decrease0 Participants
PF-06412528 >40-80 mgNumber of Participants With Pre-defined Criteria of Vital SignsSupine DBP: Change >= 20 mmHg decrease1 Participants
PF-06412528 >40-80 mgNumber of Participants With Pre-defined Criteria of Vital SignsSupine SBP: Change >= 30mmHg increase0 Participants
PF-06412528 >40-80 mgNumber of Participants With Pre-defined Criteria of Vital SignsSupine DBP: Change >= 20 mmHg increase0 Participants

Source: ClinicalTrials.gov · Data processed: Feb 4, 2026