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Study To Evaluate The Safety, Tolerability And Pharmacokinetics Of Single Doses Of PF-04958242 In Healthy Volunteers

A Phase 1, Randomized, Subject- And Investigator-blind, Sponsor Open, Placebo Controlled, Single Ascending Dose Escalation Study To Evaluate The Safety, Tolerability And Pharmacokinetics Of Pf-04958242 Following Oral Dose Capsules in Healthy Subjects

Status
Completed
Phases
Phase 1
Study type
Interventional
Source
ClinicalTrials.gov
Registry ID
NCT02228395
Enrollment
12
Registered
2014-08-29
Start date
2014-09-22
Completion date
2014-11-13
Last updated
2020-01-07

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

Conditions

Healthy

Keywords

Single ascending doses, pharmacokinetics, safety, tolerability, healthy volunteers, cognitive impairment associated with schizophrenia (CIAS)

Brief summary

This study aims to assess the safety, tolerability, and pharmacokinetics of PF-04958242 at a number of single ascending doses in healthy volunteers

Detailed description

This study was previously posted by Pfizer, Inc. Sponsorship of the trial was transferred to Biogen.

Interventions

Administered as specified in treatment arm

DRUGPlacebo

Administered as specified in treatment arm

Sponsors

Biogen
Lead SponsorINDUSTRY

Study design

Allocation
RANDOMIZED
Intervention model
CROSSOVER
Primary purpose
BASIC_SCIENCE
Masking
DOUBLE (Subject, Investigator)

Eligibility

Sex/Gender
ALL
Age
18 Years to 55 Years
Healthy volunteers
Yes

Inclusion criteria

Key Inclusion Criteria: * Healthy female subjects of non-childbearing potential and/or male subjects between the ages of 18 and 55 years, inclusive (Healthy is defined as no clinically relevant abnormalities identified by a detailed medical history, full physical examination, including blood pressure and pulse rate measurement, 12-lead ECG and clinical laboratory tests). * Body Mass Index (BMI) of 17.5 to 30.5 kg/m2; and a total body weight \>55 kg Key

Exclusion criteria

* Evidence or history of clinically significant hematological, renal, endocrine, pulmonary, gastrointestinal, cardiovascular, hepatic, psychiatric, neurologic, or allergic disease (including drug allergies, but excluding untreated, asymptomatic, seasonal allergies at time of dosing). * Other severe acute or chronic medical or psychiatric condition or laboratory abnormality that may increase the risk associated with study participation or investigational product administration or may interfere with the interpretation of study results and, in the judgment of the investigator, would make the subject inappropriate for entry into this study. NOTE: Other protocol defined Inclusion/

Design outcomes

Primary

MeasureTime frameDescription
Number of Participants With Categorical Scores on the Columbia Suicide Severity Rating Scale (C-SSRS) Post-BaselineBaseline up to Day 10The C-SSRS (mapped to Columbia Classification Algorithm of Suicide Assessment \[C-CASA\]) is an interview-based rating scale to systematically assess suicidal ideation and suicidal behavior. C-SSRS assessed whether participant experienced the following: completed suicide (1), suicide attempt (2) (response of Yes on actual attempt), preparatory acts toward imminent suicidal behavior (3)(Yes on preparatory acts or behavior), suicidal ideation (4) (Yes on wish to be dead, non-specific active suicidal thoughts, active suicidal ideation with methods without intent to act or some intent to act, without specific plan or with specific plan and intent), any suicidal behavior or ideation, self-injurious behavior (7)(Yes on Has participant engaged in non-suicidal self-injurious behavior).
Number of Participants With Treatment-Emergent Adverse Events (AEs) and Serious Adverse Events (SAEs)Baseline up to 28 days after last study drug administration.An AE was any untoward medical occurrence in a participant who received study drug. An 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/incapacity; congenital anomaly. Treatment-emergent are events between first dose of study drug and up to 28 days after last dose that were absent before treatment or that worsened relative to pre-treatment state. AEs included both SAEs and non-SAEs.
Number of Participants With Laboratory Abnormalities Meeting the Criteria for Potential Clinical ConcernBaseline up to Day 10The following laboratory parameters were analyzed: hematology (hemoglobin, hematocrit, red blood cell \[RBC\] count, mean corpuscular volume \[MCV\], mean corpuscular hemoglobin \[MCH\], mean corpuscular hemoglobin concentration \[MCHC\], platelet count, white blood cell \[WBC\] count, total neutrophils, eosinophils, monocytes, basophils, lymphocytes); blood chemistry (blood urea nitrogen \[BUN\], creatinine, glucose, calcium, sodium, potassium, chloride, total bicarbonate, aspartate aminotransferase \[AST\], alanine aminotransferase \[ALT\], total bilirubin, alkaline phosphatase, uric acid, albumin, and total protein; urinalysis (pH, glucose, protein, blood, ketones, nitrites, leukocyte esterase, urobilinogen, urine bilirubin and microscopy \[if urine dipstick was positive for blood, protein, nitrites or leukocyte esterase\]); others (follicle stimulating hormone \[FSH\], and urine drug screening).
Number of Participants With Potentially Clinically Significant Vital Signs FindingsBaseline up to Day 10Vital signs assessment included pulse rate and blood pressure. Criteria for vital sign values meeting potential clinical concern included: supine/sitting pulse rate \<40 or \>120 beats per minute (bpm), standing pulse rate \<40 or \>140 bpm; systolic blood pressure (SBP) \>=30 millimeters of mercury (mm Hg) change from baseline in same posture or SBP \<90 mm Hg, diastolic blood pressure (DBP) \>=20 mm Hg change from baseline in same posture or DBP \<50 mm Hg. IFB = increase from baseline; DFB = decrease from baseline.
Number of Participants With Potentially Clinically Significant Electrocardiogram (ECG) FindingsBaseline up to Day 10ECG parameters included pulse rate (PR) interval, QRS interval, corrected QT interval using Bazett's formula (QTcB)and corrected QT interval using Fridericia's formula (QTcF). Criteria for ECG changes meeting potential clinical concern included: PR interval greater than or equal to (\>=)300 milliseconds (msec) or \>=25% increase when baseline is greater than (\>)200 msec and \>=50% increase when baseline is less than or equal to (=\<)200 msec; QRS interval \>=140 msec or \>=50% increase from baseline (IFB); and QTcF \>=450 msec or \>=30 msec increase. The number of participants with potentially clinically significant ECG findings at any visit were reported.
Number of Participants With Abnormal Physical Examination FindingsBaseline up to Day 10A full physical examination included head, ears, eyes, nose, mouth, skin, heart and lung examinations, lymph nodes, gastrointestinal, musculoskeletal, and neurological systems. The brief physical examination focused on general appearance, the respiratory and cardiovascular systems, as well as towards participant reported symptoms.
Number of Participants With Abnormal Neurological Examination FindingsBaseline up to Day 10The extended neurological examination, performed by a board certified neurologist, included observation for cerebellar (intention) tremor and for non-cerebellar tremors (eg, resting or positional), finger nose, heel shin, Romberg, tandem walking, positional and gaze evoked nystagmus, reflexes, muscle strength, cranial nerves, sensory function of upper and lower extremities. The brief neurological examination included an assessment of motor and sensory function, cranial nerves, reflexes, non-cerebellar tremor (eg, resting or positional) and cerebellar function. The assessment of cerebellar function were complemented by the Scale for Assessment and Rating of Ataxia (SARA)

Secondary

MeasureTime frameDescription
Dose Normalized Cmax (Cmax[dn])0, 0.25, 0.5, 0.75, 1, 1.5, 2, 3, 4, 8, 12, 24, 36, 48, 72, 96, 120, 168 and 216 hours post-dose
Maximum Observed Plasma Concentration (Cmax)0, 0.25, 0.5, 0.75, 1, 1.5, 2, 3, 4, 8, 12, 24, 36, 48, 72, 96, 120, 168 and 216 hours post-dose
Dose Normalized AUCinf (AUCinf[dn])0, 0.25, 0.5, 0.75, 1, 1.5, 2, 3, 4, 8, 12, 24, 36, 48, 72, 96, 120, 168 and 216 hours post-dose
Dose Normalized AUClast (AUClast[dn])0, 0.25, 0.5, 0.75, 1, 1.5, 2, 3, 4, 8, 12, 24, 36, 48, 72, 96, 120, 168 and 216 hours post-dose
Time to Reach Maximum Observed Plasma Concentration (Tmax)0, 0.25, 0.5, 0.75, 1, 1.5, 2, 3, 4, 8, 12, 24, 36, 48, 72, 96, 120, 168 and 216 hours post-dose
Area Under the Curve From Time Zero to Last Quantifiable Concentration (AUClast)0, 0.25, 0.5, 0.75, 1, 1.5, 2, 3, 4, 8, 12, 24, 36, 48, 72, 96, 120, 168 and 216 hours post-dose
Area Under the Curve From Time Zero to Extrapolated Infinite Time (AUCinf)0, 0.25, 0.5, 0.75, 1, 1.5, 2, 3, 4, 8, 12, 24, 36, 48, 72, 96, 120, 168 and 216 hours post-dose
Apparent Clearance (CL/F)0, 0.25, 0.5, 0.75, 1, 1.5, 2, 3, 4, 8, 12, 24, 36, 48, 72, 96, 120, 168 and 216 hours post-dose
Apparent Volume of Distribution (Vz/F)0, 0.25, 0.5, 0.75, 1, 1.5, 2, 3, 4, 8, 12, 24, 36, 48, 72, 96, 120, 168 and 216 hours post-dose
Terminal Elimination Half-Life (t1/2)0, 0.25, 0.5, 0.75, 1, 1.5, 2, 3, 4, 8, 12, 24, 36, 48, 72, 96, 120, 168 and 216 hours post-doseTerminal elimination half-life is the time measured for the plasma concentration to decrease by one half.

Countries

United States

Participant flow

Pre-assignment details

Twelve participants were assigned study treatment. All participants received the assigned PF-04958242 doses during 3 periods (6 participants each received 0.35 mg, 0.6 mg and 0.8 mg doses, respectively). Nine participants received placebo. Three participants did not complete the study and they were replaced during the conduct of the study.

Participants by arm

ArmCount
All Participants
Included all participants who received at least 1 dose of study treatment in any of the intervention periods
12
Total12

Withdrawals & dropouts

PeriodReasonFG000FG001FG002
First Intervention PeriodNo longer willing to participate100
First Intervention PeriodUnable to comply with study dates011

Baseline characteristics

CharacteristicAll Participants
Age, Continuous35.8 years
STANDARD_DEVIATION 11.1
Sex: Female, Male
Female
0 Participants
Sex: Female, Male
Male
12 Participants

Adverse events

Event typeEG000
affected / at risk
EG001
affected / at risk
EG002
affected / at risk
EG003
affected / at risk
deaths
Total, all-cause mortality
— / —— / —— / —— / —
other
Total, other adverse events
4 / 64 / 62 / 64 / 9
serious
Total, serious adverse events
0 / 60 / 60 / 60 / 9

Outcome results

Primary

Number of Participants With Abnormal Neurological Examination Findings

The extended neurological examination, performed by a board certified neurologist, included observation for cerebellar (intention) tremor and for non-cerebellar tremors (eg, resting or positional), finger nose, heel shin, Romberg, tandem walking, positional and gaze evoked nystagmus, reflexes, muscle strength, cranial nerves, sensory function of upper and lower extremities. The brief neurological examination included an assessment of motor and sensory function, cranial nerves, reflexes, non-cerebellar tremor (eg, resting or positional) and cerebellar function. The assessment of cerebellar function were complemented by the Scale for Assessment and Rating of Ataxia (SARA)

Time frame: Baseline up to Day 10

ArmMeasureValue (NUMBER)
PF-04958242 0.35 mgNumber of Participants With Abnormal Neurological Examination Findings0 participants
PF-04958242 0.6 mgNumber of Participants With Abnormal Neurological Examination Findings0 participants
PF-04958242 0.8 mgNumber of Participants With Abnormal Neurological Examination Findings0 participants
PlaceboNumber of Participants With Abnormal Neurological Examination Findings0 participants
Primary

Number of Participants With Abnormal Physical Examination Findings

A full physical examination included head, ears, eyes, nose, mouth, skin, heart and lung examinations, lymph nodes, gastrointestinal, musculoskeletal, and neurological systems. The brief physical examination focused on general appearance, the respiratory and cardiovascular systems, as well as towards participant reported symptoms.

Time frame: Baseline up to Day 10

ArmMeasureValue (NUMBER)
PF-04958242 0.35 mgNumber of Participants With Abnormal Physical Examination Findings0 participants
PF-04958242 0.6 mgNumber of Participants With Abnormal Physical Examination Findings0 participants
PF-04958242 0.8 mgNumber of Participants With Abnormal Physical Examination Findings0 participants
PlaceboNumber of Participants With Abnormal Physical Examination Findings0 participants
Primary

Number of Participants With Categorical Scores on the Columbia Suicide Severity Rating Scale (C-SSRS) Post-Baseline

The C-SSRS (mapped to Columbia Classification Algorithm of Suicide Assessment \[C-CASA\]) is an interview-based rating scale to systematically assess suicidal ideation and suicidal behavior. C-SSRS assessed whether participant experienced the following: completed suicide (1), suicide attempt (2) (response of Yes on actual attempt), preparatory acts toward imminent suicidal behavior (3)(Yes on preparatory acts or behavior), suicidal ideation (4) (Yes on wish to be dead, non-specific active suicidal thoughts, active suicidal ideation with methods without intent to act or some intent to act, without specific plan or with specific plan and intent), any suicidal behavior or ideation, self-injurious behavior (7)(Yes on Has participant engaged in non-suicidal self-injurious behavior).

Time frame: Baseline up to Day 10

Population: The safety analysis population included all participants who received the study medication.

ArmMeasureGroupValue (NUMBER)
PF-04958242 0.35 mgNumber of Participants With Categorical Scores on the Columbia Suicide Severity Rating Scale (C-SSRS) Post-BaselineSuicidal ideation0 participants
PF-04958242 0.35 mgNumber of Participants With Categorical Scores on the Columbia Suicide Severity Rating Scale (C-SSRS) Post-BaselineSuicide attempt0 participants
PF-04958242 0.35 mgNumber of Participants With Categorical Scores on the Columbia Suicide Severity Rating Scale (C-SSRS) Post-BaselineSelf-injurious behavior, no suicidal intent0 participants
PF-04958242 0.35 mgNumber of Participants With Categorical Scores on the Columbia Suicide Severity Rating Scale (C-SSRS) Post-BaselinePreparatory acts to imminent suicidal behavior0 participants
PF-04958242 0.35 mgNumber of Participants With Categorical Scores on the Columbia Suicide Severity Rating Scale (C-SSRS) Post-BaselineComplete suicide0 participants
PF-04958242 0.6 mgNumber of Participants With Categorical Scores on the Columbia Suicide Severity Rating Scale (C-SSRS) Post-BaselinePreparatory acts to imminent suicidal behavior0 participants
PF-04958242 0.6 mgNumber of Participants With Categorical Scores on the Columbia Suicide Severity Rating Scale (C-SSRS) Post-BaselineSuicidal ideation0 participants
PF-04958242 0.6 mgNumber of Participants With Categorical Scores on the Columbia Suicide Severity Rating Scale (C-SSRS) Post-BaselineSelf-injurious behavior, no suicidal intent0 participants
PF-04958242 0.6 mgNumber of Participants With Categorical Scores on the Columbia Suicide Severity Rating Scale (C-SSRS) Post-BaselineSuicide attempt0 participants
PF-04958242 0.6 mgNumber of Participants With Categorical Scores on the Columbia Suicide Severity Rating Scale (C-SSRS) Post-BaselineComplete suicide0 participants
PF-04958242 0.8 mgNumber of Participants With Categorical Scores on the Columbia Suicide Severity Rating Scale (C-SSRS) Post-BaselinePreparatory acts to imminent suicidal behavior0 participants
PF-04958242 0.8 mgNumber of Participants With Categorical Scores on the Columbia Suicide Severity Rating Scale (C-SSRS) Post-BaselineComplete suicide0 participants
PF-04958242 0.8 mgNumber of Participants With Categorical Scores on the Columbia Suicide Severity Rating Scale (C-SSRS) Post-BaselineSuicide attempt0 participants
PF-04958242 0.8 mgNumber of Participants With Categorical Scores on the Columbia Suicide Severity Rating Scale (C-SSRS) Post-BaselineSuicidal ideation0 participants
PF-04958242 0.8 mgNumber of Participants With Categorical Scores on the Columbia Suicide Severity Rating Scale (C-SSRS) Post-BaselineSelf-injurious behavior, no suicidal intent0 participants
PlaceboNumber of Participants With Categorical Scores on the Columbia Suicide Severity Rating Scale (C-SSRS) Post-BaselineSuicidal ideation0 participants
PlaceboNumber of Participants With Categorical Scores on the Columbia Suicide Severity Rating Scale (C-SSRS) Post-BaselineSuicide attempt0 participants
PlaceboNumber of Participants With Categorical Scores on the Columbia Suicide Severity Rating Scale (C-SSRS) Post-BaselineComplete suicide0 participants
PlaceboNumber of Participants With Categorical Scores on the Columbia Suicide Severity Rating Scale (C-SSRS) Post-BaselinePreparatory acts to imminent suicidal behavior0 participants
PlaceboNumber of Participants With Categorical Scores on the Columbia Suicide Severity Rating Scale (C-SSRS) Post-BaselineSelf-injurious behavior, no suicidal intent0 participants
Primary

Number of Participants With Laboratory Abnormalities Meeting the Criteria for Potential Clinical Concern

The following laboratory parameters were analyzed: hematology (hemoglobin, hematocrit, red blood cell \[RBC\] count, mean corpuscular volume \[MCV\], mean corpuscular hemoglobin \[MCH\], mean corpuscular hemoglobin concentration \[MCHC\], platelet count, white blood cell \[WBC\] count, total neutrophils, eosinophils, monocytes, basophils, lymphocytes); blood chemistry (blood urea nitrogen \[BUN\], creatinine, glucose, calcium, sodium, potassium, chloride, total bicarbonate, aspartate aminotransferase \[AST\], alanine aminotransferase \[ALT\], total bilirubin, alkaline phosphatase, uric acid, albumin, and total protein; urinalysis (pH, glucose, protein, blood, ketones, nitrites, leukocyte esterase, urobilinogen, urine bilirubin and microscopy \[if urine dipstick was positive for blood, protein, nitrites or leukocyte esterase\]); others (follicle stimulating hormone \[FSH\], and urine drug screening).

Time frame: Baseline up to Day 10

Population: The safety analysis population included all participants who received the study medication.

ArmMeasureValue (NUMBER)
PF-04958242 0.35 mgNumber of Participants With Laboratory Abnormalities Meeting the Criteria for Potential Clinical Concern1 participants
PF-04958242 0.6 mgNumber of Participants With Laboratory Abnormalities Meeting the Criteria for Potential Clinical Concern2 participants
PF-04958242 0.8 mgNumber of Participants With Laboratory Abnormalities Meeting the Criteria for Potential Clinical Concern1 participants
PlaceboNumber of Participants With Laboratory Abnormalities Meeting the Criteria for Potential Clinical Concern3 participants
Primary

Number of Participants With Potentially Clinically Significant Electrocardiogram (ECG) Findings

ECG parameters included pulse rate (PR) interval, QRS interval, corrected QT interval using Bazett's formula (QTcB)and corrected QT interval using Fridericia's formula (QTcF). Criteria for ECG changes meeting potential clinical concern included: PR interval greater than or equal to (\>=)300 milliseconds (msec) or \>=25% increase when baseline is greater than (\>)200 msec and \>=50% increase when baseline is less than or equal to (=\<)200 msec; QRS interval \>=140 msec or \>=50% increase from baseline (IFB); and QTcF \>=450 msec or \>=30 msec increase. The number of participants with potentially clinically significant ECG findings at any visit were reported.

Time frame: Baseline up to Day 10

Population: The safety analysis population included all participants who received the study medication; n=number of participants evaluated against criteria.

ArmMeasureGroupValue (NUMBER)
PF-04958242 0.35 mgNumber of Participants With Potentially Clinically Significant Electrocardiogram (ECG) FindingsPR Interval >=300 msec0 participants
PF-04958242 0.35 mgNumber of Participants With Potentially Clinically Significant Electrocardiogram (ECG) FindingsQRS Complex >=140 msec0 participants
PF-04958242 0.35 mgNumber of Participants With Potentially Clinically Significant Electrocardiogram (ECG) FindingsQTcF Interval 450-<480 msec0 participants
PF-04958242 0.35 mgNumber of Participants With Potentially Clinically Significant Electrocardiogram (ECG) FindingsQTcF Interval 480-<500 msec0 participants
PF-04958242 0.35 mgNumber of Participants With Potentially Clinically Significant Electrocardiogram (ECG) FindingsQTcF Interval >=500 msec0 participants
PF-04958242 0.35 mgNumber of Participants With Potentially Clinically Significant Electrocardiogram (ECG) FindingsQTcB Interval >=500 msec0 participants
PF-04958242 0.35 mgNumber of Participants With Potentially Clinically Significant Electrocardiogram (ECG) FindingsPR Interval >=25/50% IFB0 participants
PF-04958242 0.35 mgNumber of Participants With Potentially Clinically Significant Electrocardiogram (ECG) FindingsQRS Interval >=50% IFB0 participants
PF-04958242 0.35 mgNumber of Participants With Potentially Clinically Significant Electrocardiogram (ECG) FindingsQTcF Interval 30-<60 msec IFB0 participants
PF-04958242 0.35 mgNumber of Participants With Potentially Clinically Significant Electrocardiogram (ECG) FindingsQTcF Interval >=60 msec IFB0 participants
PF-04958242 0.6 mgNumber of Participants With Potentially Clinically Significant Electrocardiogram (ECG) FindingsQTcF Interval 450-<480 msec0 participants
PF-04958242 0.6 mgNumber of Participants With Potentially Clinically Significant Electrocardiogram (ECG) FindingsQTcF Interval 30-<60 msec IFB0 participants
PF-04958242 0.6 mgNumber of Participants With Potentially Clinically Significant Electrocardiogram (ECG) FindingsQTcF Interval 480-<500 msec0 participants
PF-04958242 0.6 mgNumber of Participants With Potentially Clinically Significant Electrocardiogram (ECG) FindingsQTcF Interval >=500 msec0 participants
PF-04958242 0.6 mgNumber of Participants With Potentially Clinically Significant Electrocardiogram (ECG) FindingsQTcB Interval >=500 msec0 participants
PF-04958242 0.6 mgNumber of Participants With Potentially Clinically Significant Electrocardiogram (ECG) FindingsPR Interval >=25/50% IFB0 participants
PF-04958242 0.6 mgNumber of Participants With Potentially Clinically Significant Electrocardiogram (ECG) FindingsQTcF Interval >=60 msec IFB0 participants
PF-04958242 0.6 mgNumber of Participants With Potentially Clinically Significant Electrocardiogram (ECG) FindingsQRS Interval >=50% IFB0 participants
PF-04958242 0.6 mgNumber of Participants With Potentially Clinically Significant Electrocardiogram (ECG) FindingsPR Interval >=300 msec0 participants
PF-04958242 0.6 mgNumber of Participants With Potentially Clinically Significant Electrocardiogram (ECG) FindingsQRS Complex >=140 msec0 participants
PF-04958242 0.8 mgNumber of Participants With Potentially Clinically Significant Electrocardiogram (ECG) FindingsQRS Interval >=50% IFB0 participants
PF-04958242 0.8 mgNumber of Participants With Potentially Clinically Significant Electrocardiogram (ECG) FindingsPR Interval >=25/50% IFB0 participants
PF-04958242 0.8 mgNumber of Participants With Potentially Clinically Significant Electrocardiogram (ECG) FindingsQTcF Interval >=60 msec IFB0 participants
PF-04958242 0.8 mgNumber of Participants With Potentially Clinically Significant Electrocardiogram (ECG) FindingsPR Interval >=300 msec0 participants
PF-04958242 0.8 mgNumber of Participants With Potentially Clinically Significant Electrocardiogram (ECG) FindingsQTcF Interval 480-<500 msec0 participants
PF-04958242 0.8 mgNumber of Participants With Potentially Clinically Significant Electrocardiogram (ECG) FindingsQTcB Interval >=500 msec0 participants
PF-04958242 0.8 mgNumber of Participants With Potentially Clinically Significant Electrocardiogram (ECG) FindingsQTcF Interval 30-<60 msec IFB0 participants
PF-04958242 0.8 mgNumber of Participants With Potentially Clinically Significant Electrocardiogram (ECG) FindingsQRS Complex >=140 msec0 participants
PF-04958242 0.8 mgNumber of Participants With Potentially Clinically Significant Electrocardiogram (ECG) FindingsQTcF Interval >=500 msec0 participants
PF-04958242 0.8 mgNumber of Participants With Potentially Clinically Significant Electrocardiogram (ECG) FindingsQTcF Interval 450-<480 msec0 participants
PlaceboNumber of Participants With Potentially Clinically Significant Electrocardiogram (ECG) FindingsQTcF Interval >=500 msec0 participants
PlaceboNumber of Participants With Potentially Clinically Significant Electrocardiogram (ECG) FindingsQRS Interval >=50% IFB0 participants
PlaceboNumber of Participants With Potentially Clinically Significant Electrocardiogram (ECG) FindingsQTcB Interval >=500 msec0 participants
PlaceboNumber of Participants With Potentially Clinically Significant Electrocardiogram (ECG) FindingsQTcF Interval >=60 msec IFB0 participants
PlaceboNumber of Participants With Potentially Clinically Significant Electrocardiogram (ECG) FindingsPR Interval >=25/50% IFB0 participants
PlaceboNumber of Participants With Potentially Clinically Significant Electrocardiogram (ECG) FindingsQRS Complex >=140 msec0 participants
PlaceboNumber of Participants With Potentially Clinically Significant Electrocardiogram (ECG) FindingsQTcF Interval 450-<480 msec0 participants
PlaceboNumber of Participants With Potentially Clinically Significant Electrocardiogram (ECG) FindingsQTcF Interval 480-<500 msec0 participants
PlaceboNumber of Participants With Potentially Clinically Significant Electrocardiogram (ECG) FindingsPR Interval >=300 msec0 participants
PlaceboNumber of Participants With Potentially Clinically Significant Electrocardiogram (ECG) FindingsQTcF Interval 30-<60 msec IFB0 participants
Primary

Number of Participants With Potentially Clinically Significant Vital Signs Findings

Vital signs assessment included pulse rate and blood pressure. Criteria for vital sign values meeting potential clinical concern included: supine/sitting pulse rate \<40 or \>120 beats per minute (bpm), standing pulse rate \<40 or \>140 bpm; systolic blood pressure (SBP) \>=30 millimeters of mercury (mm Hg) change from baseline in same posture or SBP \<90 mm Hg, diastolic blood pressure (DBP) \>=20 mm Hg change from baseline in same posture or DBP \<50 mm Hg. IFB = increase from baseline; DFB = decrease from baseline.

Time frame: Baseline up to Day 10

Population: The safety analysis population included all participants who received the study medication.

ArmMeasureGroupValue (NUMBER)
PF-04958242 0.35 mgNumber of Participants With Potentially Clinically Significant Vital Signs FindingsSupine Pulse Rate <40 bpm0 participants
PF-04958242 0.35 mgNumber of Participants With Potentially Clinically Significant Vital Signs FindingsStanding SBP <90 mm Hg0 participants
PF-04958242 0.35 mgNumber of Participants With Potentially Clinically Significant Vital Signs FindingsSupine DBP <50 mm Hg0 participants
PF-04958242 0.35 mgNumber of Participants With Potentially Clinically Significant Vital Signs FindingsStanding DBP <50 mm Hg0 participants
PF-04958242 0.35 mgNumber of Participants With Potentially Clinically Significant Vital Signs FindingsSupine SBP <90 mm Hg0 participants
PF-04958242 0.35 mgNumber of Participants With Potentially Clinically Significant Vital Signs FindingsSupine Pulse >120 bpm0 participants
PF-04958242 0.35 mgNumber of Participants With Potentially Clinically Significant Vital Signs FindingsStanding Pulse Rate <40 bpm0 participants
PF-04958242 0.35 mgNumber of Participants With Potentially Clinically Significant Vital Signs FindingsStanding Pulse Rate >140 bpm0 participants
PF-04958242 0.35 mgNumber of Participants With Potentially Clinically Significant Vital Signs FindingsSupine SBP >=30 mm Hg IFB0 participants
PF-04958242 0.35 mgNumber of Participants With Potentially Clinically Significant Vital Signs FindingsStanding SBP >=30 mm Hg IFB0 participants
PF-04958242 0.35 mgNumber of Participants With Potentially Clinically Significant Vital Signs FindingsSupine DBP >=20 mm Hg IFB0 participants
PF-04958242 0.35 mgNumber of Participants With Potentially Clinically Significant Vital Signs FindingsStanding DBP >=20 mm Hg IFB1 participants
PF-04958242 0.35 mgNumber of Participants With Potentially Clinically Significant Vital Signs FindingsSupine SBP >=30 mm Hg DFB0 participants
PF-04958242 0.35 mgNumber of Participants With Potentially Clinically Significant Vital Signs FindingsStanding SBP >=30 mm Hg DFB0 participants
PF-04958242 0.35 mgNumber of Participants With Potentially Clinically Significant Vital Signs FindingsSupine DBP >=20 mm Hg DFB0 participants
PF-04958242 0.35 mgNumber of Participants With Potentially Clinically Significant Vital Signs FindingsStanding DBP >=20 mm Hg DFB0 participants
PF-04958242 0.6 mgNumber of Participants With Potentially Clinically Significant Vital Signs FindingsSupine Pulse >120 bpm0 participants
PF-04958242 0.6 mgNumber of Participants With Potentially Clinically Significant Vital Signs FindingsSupine SBP >=30 mm Hg IFB0 participants
PF-04958242 0.6 mgNumber of Participants With Potentially Clinically Significant Vital Signs FindingsStanding DBP >=20 mm Hg DFB0 participants
PF-04958242 0.6 mgNumber of Participants With Potentially Clinically Significant Vital Signs FindingsStanding DBP >=20 mm Hg IFB0 participants
PF-04958242 0.6 mgNumber of Participants With Potentially Clinically Significant Vital Signs FindingsSupine DBP >=20 mm Hg DFB0 participants
PF-04958242 0.6 mgNumber of Participants With Potentially Clinically Significant Vital Signs FindingsStanding SBP >=30 mm Hg IFB0 participants
PF-04958242 0.6 mgNumber of Participants With Potentially Clinically Significant Vital Signs FindingsSupine DBP <50 mm Hg0 participants
PF-04958242 0.6 mgNumber of Participants With Potentially Clinically Significant Vital Signs FindingsSupine DBP >=20 mm Hg IFB0 participants
PF-04958242 0.6 mgNumber of Participants With Potentially Clinically Significant Vital Signs FindingsSupine Pulse Rate <40 bpm1 participants
PF-04958242 0.6 mgNumber of Participants With Potentially Clinically Significant Vital Signs FindingsStanding Pulse Rate <40 bpm0 participants
PF-04958242 0.6 mgNumber of Participants With Potentially Clinically Significant Vital Signs FindingsStanding DBP <50 mm Hg0 participants
PF-04958242 0.6 mgNumber of Participants With Potentially Clinically Significant Vital Signs FindingsStanding SBP <90 mm Hg0 participants
PF-04958242 0.6 mgNumber of Participants With Potentially Clinically Significant Vital Signs FindingsSupine SBP >=30 mm Hg DFB0 participants
PF-04958242 0.6 mgNumber of Participants With Potentially Clinically Significant Vital Signs FindingsStanding Pulse Rate >140 bpm0 participants
PF-04958242 0.6 mgNumber of Participants With Potentially Clinically Significant Vital Signs FindingsStanding SBP >=30 mm Hg DFB1 participants
PF-04958242 0.6 mgNumber of Participants With Potentially Clinically Significant Vital Signs FindingsSupine SBP <90 mm Hg0 participants
PF-04958242 0.8 mgNumber of Participants With Potentially Clinically Significant Vital Signs FindingsSupine Pulse >120 bpm0 participants
PF-04958242 0.8 mgNumber of Participants With Potentially Clinically Significant Vital Signs FindingsSupine Pulse Rate <40 bpm0 participants
PF-04958242 0.8 mgNumber of Participants With Potentially Clinically Significant Vital Signs FindingsStanding SBP >=30 mm Hg DFB0 participants
PF-04958242 0.8 mgNumber of Participants With Potentially Clinically Significant Vital Signs FindingsStanding Pulse Rate <40 bpm0 participants
PF-04958242 0.8 mgNumber of Participants With Potentially Clinically Significant Vital Signs FindingsStanding Pulse Rate >140 bpm0 participants
PF-04958242 0.8 mgNumber of Participants With Potentially Clinically Significant Vital Signs FindingsStanding DBP >=20 mm Hg DFB0 participants
PF-04958242 0.8 mgNumber of Participants With Potentially Clinically Significant Vital Signs FindingsSupine SBP >=30 mm Hg IFB0 participants
PF-04958242 0.8 mgNumber of Participants With Potentially Clinically Significant Vital Signs FindingsStanding SBP >=30 mm Hg IFB1 participants
PF-04958242 0.8 mgNumber of Participants With Potentially Clinically Significant Vital Signs FindingsSupine DBP >=20 mm Hg DFB0 participants
PF-04958242 0.8 mgNumber of Participants With Potentially Clinically Significant Vital Signs FindingsSupine DBP >=20 mm Hg IFB0 participants
PF-04958242 0.8 mgNumber of Participants With Potentially Clinically Significant Vital Signs FindingsStanding DBP >=20 mm Hg IFB0 participants
PF-04958242 0.8 mgNumber of Participants With Potentially Clinically Significant Vital Signs FindingsSupine SBP <90 mm Hg0 participants
PF-04958242 0.8 mgNumber of Participants With Potentially Clinically Significant Vital Signs FindingsStanding SBP <90 mm Hg0 participants
PF-04958242 0.8 mgNumber of Participants With Potentially Clinically Significant Vital Signs FindingsSupine SBP >=30 mm Hg DFB0 participants
PF-04958242 0.8 mgNumber of Participants With Potentially Clinically Significant Vital Signs FindingsSupine DBP <50 mm Hg0 participants
PF-04958242 0.8 mgNumber of Participants With Potentially Clinically Significant Vital Signs FindingsStanding DBP <50 mm Hg0 participants
PlaceboNumber of Participants With Potentially Clinically Significant Vital Signs FindingsStanding DBP >=20 mm Hg DFB0 participants
PlaceboNumber of Participants With Potentially Clinically Significant Vital Signs FindingsStanding Pulse Rate >140 bpm0 participants
PlaceboNumber of Participants With Potentially Clinically Significant Vital Signs FindingsSupine DBP <50 mm Hg0 participants
PlaceboNumber of Participants With Potentially Clinically Significant Vital Signs FindingsSupine SBP <90 mm Hg0 participants
PlaceboNumber of Participants With Potentially Clinically Significant Vital Signs FindingsStanding SBP >=30 mm Hg DFB0 participants
PlaceboNumber of Participants With Potentially Clinically Significant Vital Signs FindingsStanding Pulse Rate <40 bpm0 participants
PlaceboNumber of Participants With Potentially Clinically Significant Vital Signs FindingsSupine SBP >=30 mm Hg DFB0 participants
PlaceboNumber of Participants With Potentially Clinically Significant Vital Signs FindingsStanding SBP <90 mm Hg0 participants
PlaceboNumber of Participants With Potentially Clinically Significant Vital Signs FindingsSupine Pulse Rate <40 bpm0 participants
PlaceboNumber of Participants With Potentially Clinically Significant Vital Signs FindingsStanding SBP >=30 mm Hg IFB0 participants
PlaceboNumber of Participants With Potentially Clinically Significant Vital Signs FindingsSupine Pulse >120 bpm0 participants
PlaceboNumber of Participants With Potentially Clinically Significant Vital Signs FindingsSupine DBP >=20 mm Hg IFB0 participants
PlaceboNumber of Participants With Potentially Clinically Significant Vital Signs FindingsSupine DBP >=20 mm Hg DFB0 participants
PlaceboNumber of Participants With Potentially Clinically Significant Vital Signs FindingsSupine SBP >=30 mm Hg IFB0 participants
PlaceboNumber of Participants With Potentially Clinically Significant Vital Signs FindingsStanding DBP <50 mm Hg0 participants
PlaceboNumber of Participants With Potentially Clinically Significant Vital Signs FindingsStanding DBP >=20 mm Hg IFB1 participants
Primary

Number of Participants With Treatment-Emergent Adverse Events (AEs) and Serious Adverse Events (SAEs)

An AE was any untoward medical occurrence in a participant who received study drug. An 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/incapacity; congenital anomaly. Treatment-emergent are events between first dose of study drug and up to 28 days after last dose that were absent before treatment or that worsened relative to pre-treatment state. AEs included both SAEs and non-SAEs.

Time frame: Baseline up to 28 days after last study drug administration.

Population: The safety analysis population included all participants who received the study medication.

ArmMeasureGroupValue (NUMBER)
PF-04958242 0.35 mgNumber of Participants With Treatment-Emergent Adverse Events (AEs) and Serious Adverse Events (SAEs)AEs4 participants
PF-04958242 0.35 mgNumber of Participants With Treatment-Emergent Adverse Events (AEs) and Serious Adverse Events (SAEs)SAEs0 participants
PF-04958242 0.6 mgNumber of Participants With Treatment-Emergent Adverse Events (AEs) and Serious Adverse Events (SAEs)SAEs0 participants
PF-04958242 0.6 mgNumber of Participants With Treatment-Emergent Adverse Events (AEs) and Serious Adverse Events (SAEs)AEs4 participants
PF-04958242 0.8 mgNumber of Participants With Treatment-Emergent Adverse Events (AEs) and Serious Adverse Events (SAEs)AEs2 participants
PF-04958242 0.8 mgNumber of Participants With Treatment-Emergent Adverse Events (AEs) and Serious Adverse Events (SAEs)SAEs0 participants
PlaceboNumber of Participants With Treatment-Emergent Adverse Events (AEs) and Serious Adverse Events (SAEs)AEs4 participants
PlaceboNumber of Participants With Treatment-Emergent Adverse Events (AEs) and Serious Adverse Events (SAEs)SAEs0 participants
Secondary

Apparent Clearance (CL/F)

Time frame: 0, 0.25, 0.5, 0.75, 1, 1.5, 2, 3, 4, 8, 12, 24, 36, 48, 72, 96, 120, 168 and 216 hours post-dose

Population: The PK analysis population included all participants randomized and treated who had at least 1 of the PK parameters of primary interest in at least 1 treatment period.

ArmMeasureValue (GEOMETRIC_MEAN)Dispersion
PF-04958242 0.35 mgApparent Clearance (CL/F)128.6 milliliters per minute (mL/min)Geometric Coefficient of Variation 40
PF-04958242 0.6 mgApparent Clearance (CL/F)126.0 milliliters per minute (mL/min)Geometric Coefficient of Variation 28
PF-04958242 0.8 mgApparent Clearance (CL/F)146.9 milliliters per minute (mL/min)Geometric Coefficient of Variation 26
Secondary

Apparent Volume of Distribution (Vz/F)

Time frame: 0, 0.25, 0.5, 0.75, 1, 1.5, 2, 3, 4, 8, 12, 24, 36, 48, 72, 96, 120, 168 and 216 hours post-dose

Population: The PK analysis population included all participants randomized and treated who had at least 1 of the PK parameters of primary interest in at least 1 treatment period.

ArmMeasureValue (GEOMETRIC_MEAN)Dispersion
PF-04958242 0.35 mgApparent Volume of Distribution (Vz/F)367.9 litersGeometric Coefficient of Variation 45
PF-04958242 0.6 mgApparent Volume of Distribution (Vz/F)327.0 litersGeometric Coefficient of Variation 40
PF-04958242 0.8 mgApparent Volume of Distribution (Vz/F)337.2 litersGeometric Coefficient of Variation 43
Secondary

Area Under the Curve From Time Zero to Extrapolated Infinite Time (AUCinf)

Time frame: 0, 0.25, 0.5, 0.75, 1, 1.5, 2, 3, 4, 8, 12, 24, 36, 48, 72, 96, 120, 168 and 216 hours post-dose

Population: The PK analysis population included all participants randomized and treated who had at least 1 of the PK parameters of primary interest in at least 1 treatment period.

ArmMeasureValue (GEOMETRIC_MEAN)Dispersion
PF-04958242 0.35 mgArea Under the Curve From Time Zero to Extrapolated Infinite Time (AUCinf)45.34 ng*h/mLGeometric Coefficient of Variation 40
PF-04958242 0.6 mgArea Under the Curve From Time Zero to Extrapolated Infinite Time (AUCinf)79.34 ng*h/mLGeometric Coefficient of Variation 28
PF-04958242 0.8 mgArea Under the Curve From Time Zero to Extrapolated Infinite Time (AUCinf)90.78 ng*h/mLGeometric Coefficient of Variation 26
Secondary

Area Under the Curve From Time Zero to Last Quantifiable Concentration (AUClast)

Time frame: 0, 0.25, 0.5, 0.75, 1, 1.5, 2, 3, 4, 8, 12, 24, 36, 48, 72, 96, 120, 168 and 216 hours post-dose

Population: The PK analysis population included all participants randomized and treated who had at least 1 of the PK parameters of primary interest in at least 1 treatment period.

ArmMeasureValue (GEOMETRIC_MEAN)Dispersion
PF-04958242 0.35 mgArea Under the Curve From Time Zero to Last Quantifiable Concentration (AUClast)42.79 nanograms*hours per milliliter (ng*h/mL)Geometric Coefficient of Variation 36
PF-04958242 0.6 mgArea Under the Curve From Time Zero to Last Quantifiable Concentration (AUClast)76.00 nanograms*hours per milliliter (ng*h/mL)Geometric Coefficient of Variation 22
PF-04958242 0.8 mgArea Under the Curve From Time Zero to Last Quantifiable Concentration (AUClast)88.27 nanograms*hours per milliliter (ng*h/mL)Geometric Coefficient of Variation 23
Secondary

Dose Normalized AUCinf (AUCinf[dn])

Time frame: 0, 0.25, 0.5, 0.75, 1, 1.5, 2, 3, 4, 8, 12, 24, 36, 48, 72, 96, 120, 168 and 216 hours post-dose

Population: The PK analysis population included all participants randomized and treated who had at least 1 of the PK parameters of primary interest in at least 1 treatment period.

ArmMeasureValue (GEOMETRIC_MEAN)Dispersion
PF-04958242 0.35 mgDose Normalized AUCinf (AUCinf[dn])129.7 ng*h/mL/mgGeometric Coefficient of Variation 40
PF-04958242 0.6 mgDose Normalized AUCinf (AUCinf[dn])132.3 ng*h/mL/mgGeometric Coefficient of Variation 28
PF-04958242 0.8 mgDose Normalized AUCinf (AUCinf[dn])113.6 ng*h/mL/mgGeometric Coefficient of Variation 26
Secondary

Dose Normalized AUClast (AUClast[dn])

Time frame: 0, 0.25, 0.5, 0.75, 1, 1.5, 2, 3, 4, 8, 12, 24, 36, 48, 72, 96, 120, 168 and 216 hours post-dose

Population: The PK analysis population included all participants randomized and treated who had at least 1 of the PK parameters of primary interest in at least 1 treatment period.

ArmMeasureValue (GEOMETRIC_MEAN)Dispersion
PF-04958242 0.35 mgDose Normalized AUClast (AUClast[dn])122.4 ng*h/mL/mgGeometric Coefficient of Variation 37
PF-04958242 0.6 mgDose Normalized AUClast (AUClast[dn])126.6 ng*h/mL/mgGeometric Coefficient of Variation 22
PF-04958242 0.8 mgDose Normalized AUClast (AUClast[dn])110.5 ng*h/mL/mgGeometric Coefficient of Variation 24
Secondary

Dose Normalized Cmax (Cmax[dn])

Time frame: 0, 0.25, 0.5, 0.75, 1, 1.5, 2, 3, 4, 8, 12, 24, 36, 48, 72, 96, 120, 168 and 216 hours post-dose

Population: The PK analysis population included all participants randomized and treated who had at least 1 of the PK parameters of primary interest in at least 1 treatment period.

ArmMeasureValue (GEOMETRIC_MEAN)Dispersion
PF-04958242 0.35 mgDose Normalized Cmax (Cmax[dn])8.923 mg/mL/mgGeometric Coefficient of Variation 23
PF-04958242 0.6 mgDose Normalized Cmax (Cmax[dn])9.331 mg/mL/mgGeometric Coefficient of Variation 29
PF-04958242 0.8 mgDose Normalized Cmax (Cmax[dn])7.745 mg/mL/mgGeometric Coefficient of Variation 24
Secondary

Maximum Observed Plasma Concentration (Cmax)

Time frame: 0, 0.25, 0.5, 0.75, 1, 1.5, 2, 3, 4, 8, 12, 24, 36, 48, 72, 96, 120, 168 and 216 hours post-dose

Population: The pharmacokinetic (PK) parameter analysis set included all participants randomized and treated who had at least 1 of the PK parameters of interest in at least 1 treatment period.

ArmMeasureValue (GEOMETRIC_MEAN)Dispersion
PF-04958242 0.35 mgMaximum Observed Plasma Concentration (Cmax)3.119 nanograms per milliliter (ng/mL)Geometric Coefficient of Variation 22
PF-04958242 0.6 mgMaximum Observed Plasma Concentration (Cmax)5.602 nanograms per milliliter (ng/mL)Geometric Coefficient of Variation 29
PF-04958242 0.8 mgMaximum Observed Plasma Concentration (Cmax)6.193 nanograms per milliliter (ng/mL)Geometric Coefficient of Variation 24
Secondary

Terminal Elimination Half-Life (t1/2)

Terminal elimination half-life is the time measured for the plasma concentration to decrease by one half.

Time frame: 0, 0.25, 0.5, 0.75, 1, 1.5, 2, 3, 4, 8, 12, 24, 36, 48, 72, 96, 120, 168 and 216 hours post-dose

Population: The PK analysis population included all participants randomized and treated who had at least 1 of the PK parameters of primary interest in at least 1 treatment period.

ArmMeasureValue (MEAN)Dispersion
PF-04958242 0.35 mgTerminal Elimination Half-Life (t1/2)37.33 hoursStandard Deviation 27.17
PF-04958242 0.6 mgTerminal Elimination Half-Life (t1/2)34.10 hoursStandard Deviation 20.533
PF-04958242 0.8 mgTerminal Elimination Half-Life (t1/2)29.07 hoursStandard Deviation 14.691
Secondary

Time to Reach Maximum Observed Plasma Concentration (Tmax)

Time frame: 0, 0.25, 0.5, 0.75, 1, 1.5, 2, 3, 4, 8, 12, 24, 36, 48, 72, 96, 120, 168 and 216 hours post-dose

Population: The PK analysis population included all participants randomized and treated who had at least 1 of the PK parameters of primary interest in at least 1 treatment period.

ArmMeasureValue (MEDIAN)
PF-04958242 0.35 mgTime to Reach Maximum Observed Plasma Concentration (Tmax)1.29 hours
PF-04958242 0.6 mgTime to Reach Maximum Observed Plasma Concentration (Tmax)1.80 hours
PF-04958242 0.8 mgTime to Reach Maximum Observed Plasma Concentration (Tmax)1.50 hours

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