Skip to content

Efficacy and Tolerability of Rimegepant for the Prevention of Migraine in Adults With History of Inadequate Response to Oral Preventive Medications

A Phase 4, Randomized, Double-blind, Placebo-controlled Study to Evaluate the Efficacy and Tolerability of Rimegepant for the Prevention of Migraine in Adults With a History of Inadequate Response to Oral Preventive Medications

Status
Completed
Phases
Phase 4
Study type
Interventional
Source
ClinicalTrials.gov
Registry ID
NCT05518123
Enrollment
962
Registered
2022-08-26
Start date
2022-11-07
Completion date
2025-07-08
Last updated
2026-05-22

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

Conditions

Migraine

Keywords

Migraine Prevention, Headache, Headache Prevention, Migraine Prevention in adults with inadequate response to oral preventative medications

Brief summary

This study is being conducted to evaluate the efficacy and tolerability of rimegepant for migraine prophylaxis in adults with a history of inadequate response to oral preventive medications

Interventions

DRUGRimegepant

Rimegepant 75 mg Oral Disintegrating Tablet (ODT) taken every other day during Double-blind Treatment (DBT) phase

DRUGPlacebo

Matching placebo with every other day dosing during DBT phase

Sponsors

Pfizer
Lead SponsorINDUSTRY

Study design

Allocation
RANDOMIZED
Intervention model
PARALLEL
Primary purpose
PREVENTION
Masking
QUADRUPLE (Subject, Caregiver, Investigator, Outcomes Assessor)

Eligibility

Sex/Gender
ALL
Age
18 Years to No maximum
Healthy volunteers
No

Inclusion criteria

1. Migraine attacks present for more than 1 year with the age of onset prior to 50 years of age. 2. Migraine attacks, on average, lasting about 4 - 72 hours, if untreated. 3. 4 to 14 migraine days per month, on average, across the 3 months prior to the Screening Visit (month is defined as 28-days for the purpose of this protocol). 4. Less than15 headache days (migraine or non-migraine) per month in each of the 3-months prior to the Screening Visit and throughout the Screening Phase. 5. Subjects must be able to distinguish migraine attacks from tension/cluster headaches. Prior inadequate response, within 10 years of the Screening Visit, to agents across 2-4 categories of recognized, orally-administered, migraine-preventive medications where at least one example of prior inadequate response is due to lack of efficacy or prior intolerance (not contraindication).

Exclusion criteria

1. History of cluster headaches, basilar migraine (migraine with brainstem aura), or hemiplegic migraine. 2. Current medication overuse headaches. 3. 15 or more headache days (migraine or non-migraine) per month in any of the 3-months prior to the Screening Visit or during the first 28- days of the Observation Phase. 4. Inadequate response (due to lack of efficacy, prior intolerance, or contraindication) to agents across \> 4 categories of recognized, orally administered, migraine-preventive medications. 5. Active chronic pain syndrome (such as fibromyalgia, chronic pelvic pain, complex regional pain syndrome \[CRPS\]). 6. Other pain syndromes (including trigeminal neuralgia), dementia, or significant neurological disorders (other than migraine) that, in the Investigator's opinion, interfere with study assessments of safety or efficacy.

Design outcomes

Primary

MeasureTime frameDescription
Mean Change From Observation Phase (OP) in the Number of Migraine Days Per Month Over the Entire DBT Phase (Weeks 1 to 12)Observation phase (28 days prior to randomization), DBT phase (through Month 3 [Week 1 to 12])A migraine day was defined as any calendar day in which participant (1) had a qualified migraine headache or (2) took acute migraine-specific medication (i.e., triptan, ergotamine, lasmiditan, or ubrogepant) to treat headache or aura. A qualified migraine headache was defined as a migraine with or without aura, lasting for \>=30 minutes, met criteria: \>=2 of pain features: unilateral location; pulsating quality (throbbing); moderate or severe pain intensity; aggravation by or causing avoidance of routine physical activity (e.g., walking or climbing stairs) or \>=1 of associated symptoms: nausea and/or vomiting; photophobia and phonophobia. Number of migraine days per month were prorated to 28 days.

Secondary

MeasureTime frameDescription
Percentage of Participants With >= 50 Percent (%) Reduction From OP in the Number of Moderate or Severe Migraine Days (MD) Per Month Over the Entire DBT Phase (Weeks 1 to 12)DBT phase (through Month 3 [Week 1 to 12])Moderate or severe MD: a MD of moderate or severe headache pain intensity. MD: any calendar day in which participant (1) had a qualified migraine headache or (2) took acute migraine-specific medication (i.e., triptan, ergotamine, lasmiditan, or ubrogepant) to treat headache or aura. Qualified migraine headache: migraine with or without aura, lasting for \>=30 minutes, met criteria: \>=2 of pain features: unilateral location; pulsating quality (throbbing); moderate or severe pain intensity; aggravation by or causing avoidance of routine physical activity (e.g., walking or climbing stairs) or \>=1 of associated symptoms: nausea and/or vomiting; photophobia and phonophobia. Number of moderate or severe MD per month were prorated to 28 days and derived from data in the on-DBT efficacy analysis period as follows: 28\*(total number of moderate or severe MD through Month 3 \[Weeks 1 to 12\])/(total number of e-diary efficacy data days through Month 3 \[Weeks 1 to 12\]).
Mean Change From OP in the Number of Migraine Days Per Month in the First 4 Weeks (Weeks 1 to 4) of the DBT PhaseObservation phase (28 days prior to randomization), Week 1 to Week 4 of the DBT phaseA migraine day was defined as any calendar day in which participant (1) had a qualified migraine headache or (2) took acute migraine-specific medication (i.e., triptan, ergotamine, lasmiditan, or ubrogepant) to treat headache or aura. A qualified migraine headache was defined as a migraine with or without aura, lasting for \>=30 minutes, met criteria: \>=2 of pain features: unilateral location; pulsating quality (throbbing); moderate or severe pain intensity; aggravation by or causing avoidance of routine physical activity (e.g., walking or climbing stairs) or \>=1 of associated symptoms: nausea and/or vomiting; photophobia and phonophobia. Number of migraine days per month were prorated to 28 days.
Mean Change From OP in the Number of Migraine Days Per Month in the Last 4 Weeks (Weeks 9 to 12) of the DBT PhaseObservation phase (28 days prior to randomization), Week 9 to Week 12 of the DBT phaseA migraine day was defined as any calendar day in which participant (1) had a qualified migraine headache or (2) took acute migraine-specific medication (i.e., triptan, ergotamine, lasmiditan, or ubrogepant) to treat headache or aura. A qualified migraine headache was defined as a migraine with or without aura, lasting for \>=30 minutes, met criteria: \>=2 of pain features: unilateral location; pulsating quality (throbbing); moderate or severe pain intensity; aggravation by or causing avoidance of routine physical activity (e.g., walking or climbing stairs) or \>=1 of associated symptoms: nausea and/or vomiting; photophobia and phonophobia. Number of migraine days per month were prorated to 28 days.
Mean Change From Baseline in the Migraine-Specific Quality-of-Life Questionnaire (MSQ) Version 2.1 Restrictive Role Function Domain Score at Week 12 of the DBT PhaseBaseline (Day 1) and Week 12 of the DBT phaseMSQ version 2.1 was a self-administered, 14-item instrument validated in 3 domains: role function-restrictive (7 items), role function-preventive (4 items), emotional function (3 items). The restrictive role function domain consisted of 7 items that described how migraine limited one's daily social and work-related activities. Each item was scored on a 6-point scale ranging from 1 to 6, where "1: none of the time," "2: a little bit of the time," "3: some of the time," "4: a good bit of the time," "5: most of the time," and "6: all of the time,". Item scores were recoded using (7 - original score). Raw dimension scores for restrictive role function domain were computed as a sum of recoded item scores and rescaled from a 0 to 100 scale such that lower score (0) indicated poor quality of life and higher scores (100) indicated better quality of life.
Mean Change From Baseline in the Migraine Interictal Burden Scale (MIBS) Score at Week 12 of the DBT PhaseBaseline (Day 1) and Week 12MIBS was a 4-item self-administered questionnaire that measures: impairment in work or school, impairment in family and social life, difficulty making plans or commitments, and emotional/affective and cognitive distress. Each item was rated on a 6-point scale as: don't know/ not applicable; never; rarely; some of the time; much of the time; most or all of the time. The MIBS score was the weighted sum of the item scores and ranged from 0 to 12. Higher scores indicated a greater impact of headaches on the participant's life between headache attacks.
Number of Participants With Any Adverse Events (AEs) by Worst Intensity in the DBT Phase.DBT Phase: From Day 1 to Week 12An AE was defined as any new untoward medical occurrence or worsening of a pre-existing medical condition in a participant or clinical investigation participant administered an investigational (medicinal) product and that did not necessarily have a causal relationship with this treatment. AE intensity included mild, moderate and severe, where Mild: usually transient and required only minimal treatment or therapeutic intervention. Event did not generally interfere with usual activities of daily living. Moderate: usually alleviated with additional specific therapeutic intervention. Event interfered with usual activities of daily living, causing discomfort but poses no significant or permanent risk of harm to participant. Severe: interrupted usual activities of daily living, significantly affected clinical status, or required intensive therapeutic intervention. Participants were counted once in each intensity category based on greatest intensity of unique adverse event preferred terms.
Number of Participants With Any AEs by Worst Intensity in the OLE PhaseOLE Phase: From Week 12 to Week 24An AE was defined as any new untoward medical occurrence or worsening of a pre-existing medical condition in a participant or clinical investigation participant administered an investigational (medicinal) product and that did not necessarily have a causal relationship with this treatment. AE intensity included mild, moderate and severe, where Mild: usually transient and required only minimal treatment or therapeutic intervention. Event did not generally interfere with usual activities of daily living. Moderate: usually alleviated with additional specific therapeutic intervention. Event interfered with usual activities of daily living, causing discomfort but poses no significant or permanent risk of harm to participant. Severe: interrupted usual activities of daily living, significantly affected clinical status, or required intensive therapeutic intervention. Participants were counted once in each intensity category based on greatest intensity of unique adverse event preferred terms.
Number of Participants With Serious AEs (SAEs) in the DBT PhaseDBT Phase: From Day 1 to Week 12A serious adverse event (SAE) was any event that met any of the following criteria at any dose: resulted in death; was life-threatening; required inpatient hospitalization or prolongation of existing hospitalization; resulted in persistent or significant disability/ incapacity; resulted in congenital anomaly/birth defect in the offspring who received rimegepant and other important medical events.
Number of Participants With SAEs in the OLE PhaseOLE Phase: From Week 12 to Week 24A SAE was any event that met any of the following criteria at any dose: resulted in death; was life-threatening; required inpatient hospitalization or prolongation of existing hospitalization; resulted in persistent or significant disability/ incapacity; resulted in congenital anomaly/birth defect in the offspring who received rimegepant and other important medical events.
Number of Participants With AEs Leading to Study Drug Discontinuation in the DBT PhaseDBT Phase: From Day 1 to Week 12An AE was defined as any new untoward medical occurrence or worsening of a pre-existing medical condition in a participant or clinical investigation participant administered an investigational (medicinal) product and that did not necessarily have a causal relationship with this treatment. In this outcome measure, participants with AEs leading to discontinuation of study drug were reported.
Number of Participants With AEs Leading to Study Drug Discontinuation in the OLE PhaseOLE Phase: From Week 12 to Week 24An AE was defined as any new untoward medical occurrence or worsening of a pre-existing medical condition in a participant or clinical investigation participant administered an investigational (medicinal) product and that did not necessarily have a causal relationship with this treatment. In this outcome measure, participants with AEs leading to discontinuation of study drug were reported.
Number of Participants With Grade 3 to 4 Laboratory Abnormalities: DBT PhaseDBT Phase: From Day 1 to Week 12Laboratory tests included hematology and serum chemistry. All laboratory tests except glucose were graded according to National Cancer Institute (NCI) Common Terminology Criteria for Adverse Events (CTCAE) version (v)5.0, where Grade 3=severe events which require hospitalization or prolongation of hospitalization and Grade 4=life-threatening consequences requiring urgent intervention. Glucose was graded according to Division of Acquired Immune Deficiency Syndrome table for Grading Severity of Adult and Pediatric Adverse Events v2.1. Only those Grade 3 or 4 laboratory tests with non-zero values in any of treatment arms are reported in this outcome measure.
Number of Participants With Grade 3 to 4 Laboratory Abnormalities: OLE PhaseOLE Phase: From Week 12 to Week 24Laboratory tests included hematology and serum chemistry. All laboratory tests except glucose were graded according to NCI CTCAE v5.0, where Grade 3=severe events which require hospitalization or prolongation of hospitalization and Grade 4=life-threatening consequences requiring urgent intervention. Glucose was graded according to Division of Acquired Immune Deficiency Syndrome table for Grading Severity of Adult and Pediatric Adverse Events v2.1. Only those Grade 3 or 4 laboratory tests with non-zero values in any of treatment arms are reported in this outcome measure.
Percentage of Participants With >= 50% Reduction From OP in the Number of Migraine Days Per Month (Regardless of Pain Intensity) Over the Entire DBT Phase (Weeks 1 to 12)DBT phase (through Month 3 [Week 1 to 12])A migraine day was defined as any calendar day in which participant (1) had a qualified migraine headache or (2) took acute migraine-specific medication (i.e., triptan, ergotamine, lasmiditan, or ubrogepant) to treat headache or aura. A qualified migraine headache was defined as a migraine with or without aura, lasting for \>=30 minutes, met criteria: \>=2 of pain features: unilateral location; pulsating quality (throbbing); moderate or severe pain intensity; aggravation by or causing avoidance of routine physical activity (e.g., walking or climbing stairs) or \>=1 of associated symptoms: nausea and/or vomiting; photophobia and phonophobia. Number of migraine days per month were prorated to 28 days and derived from data in the on-DBT efficacy analysis period as follows: 28\*(total number of migraine days through Month 3 \[Weeks 1 to 12\])/(total number of e-diary efficacy data days through Month 3 \[Weeks 1 to 12\]).
Mean Number of Acute Migraine-Specific Medication Days Per Month in Each Month and Over the Entire DBT Phase (Weeks 1 to 12)DBT phase Months 1, 2 and 3; overall DBT through Month 3 (Week 1 to 12)An acute migraine-specific medication day was defined as any calendar day during which a participant took a migraine-specific acute migraine medication (i.e., triptan, ergotamine, lasmiditan, or ubrogepant) to treat headache or aura. The number of acute migraine-specific medication days per month were prorated to 28 days.
Mean Change From Baseline in MIBS Scores at Weeks 4, 8, and 12 in the DBT PhaseDBT Phase: Baseline (Day 1), Weeks 4, 8, and 12MIBS was a 4-item self-administered questionnaire that measures: impairment in work or school, impairment in family and social life, difficulty making plans or commitments, and emotional/affective and cognitive distress. Each item was rated on a 6-point scale as: don't know/ not applicable; never; rarely; some of the time; much of the time; most or all of the time. The MIBS score was the weighted sum of the item scores and ranged from 0 to 12. Higher scores indicated a greater impact of headaches on the participant's life between headache attacks.
Mean Change From Baseline in MSQ Domain Scores at Weeks 4, 8, and 12 in the DBT PhaseDBT Phase: Baseline (Day 1), Weeks 4, 8, and 12MSQ was a self-administered, 14-item instrument validated in 3 domains: role function-restrictive (7 items), role function-preventive (4 items), emotional function (3 items). Each item was scored on a 6-point scale ranging from 1 to 6, where "1: none of the time," "2: a little bit of the time," "3: some of the time," "4: a good bit of the time," "5: most of the time," and "6: all of the time,". Item scores were recoded using (7 - original score). Raw domain scores are computed as a sum of item responses and rescaled to a 0 to 100 scale such that lower score (0) indicated poor quality of life and higher scores (100) indicated better quality of life.
Mean Change From Baseline in Migraine Functional Impact Questionnaire (MFIQ) Domain Scores in Each Month of the DBT PhaseDBT Phase: Baseline (Day 1), Months 1, 2, and 3MFIQ was a 26-item participant-report questionnaire. It is designed to measure the subjective impact of migraine on physical, social, and emotional functioning over 5 domains: physical function (5 items), usual activities (10 items), social function (5 items), emotional function (5 items) and overall impact on usual activities (16 items). Participants responded to items using a 5-point scale assigned scores from 1 to 5, with 5 representing the greatest burden. Each domain score was calculated as the sum of the item responses and rescaled to a 0 to 100 scale, with higher scores representing greater burden. The recall period was the past 7 days.
Change From Baseline in Work Productivity and Activity Impairment (WPAI) - Migraine Absenteeism Scores at Weeks 4, 8, and 12 in the DBT PhaseDBT Phase: Baseline (Day 1), Weeks 4, 8, and 12The WPAI was a 6-item participant-administered questionnaire used to capture work impairment due to migraine pain. The questions are as follows: Q1 = currently employed (yes/no); Q2 = hours missed due to health problems; Q3 = hours missed due to other reasons; Q4 = hours actually worked; Q5 = degree health affected productivity while working (0-10 scale, with higher numbers indicating less productivity); Q6 = degree health affected regular activities (0-10 scale, with higher numbers indicating greater impairment of regular activities). The absenteeism score was calculated from Q2 and Q4 for participants who responded "yes" to Q1 and ranged from 0 to 100 with higher score indicating greater impairment and less productivity.
Change From Baseline in WPAI - Migraine Presenteeism Scores at Weeks 4, 8, and 12 in the DBT PhaseDBT Phase: Baseline (Day 1), Weeks 4, 8, and 12The WPAI was a 6-item participant-administered questionnaire used to capture work impairment due to migraine pain. The questions are as follows: Q1 = currently employed (yes/no); Q2 = hours missed due to health problems; Q3 = hours missed due to other reasons; Q4 = hours actually worked; Q5 = degree health affected productivity while working (0-10 scale, with higher numbers indicating less productivity); Q6 = degree health affected regular activities (0-10 scale, with higher numbers indicating greater impairment of regular activities). The presenteeism score was calculated using Q5 for participants who responded "yes" to Q1 and had Q4\>0 and ranged from 0 to 100 with higher score indicating greater impairment and less productivity.
Change From Baseline in WPAI - Migraine Work Productivity Loss Scores at Weeks 4, 8, and 12 in the DBT PhaseDBT Phase: Baseline (Day 1), Weeks 4, 8, and 12The WPAI was a 6-item participant-administered questionnaire used to capture work impairment due to migraine pain. The questions are as follows: Q1 = currently employed (yes/no); Q2 = hours missed due to health problems; Q3 = hours missed due to other reasons; Q4 = hours actually worked; Q5 = degree health affected productivity while working (0-10 scale, with higher numbers indicating less productivity); Q6 = degree health affected regular activities (0-10 scale, with higher numbers indicating greater impairment of regular activities). The work productivity loss score was calculated using Q2, Q4, and Q5 for participants who responded "yes" to Q1 and ranged from 0 to 100 with higher score indicating greater impairment and less productivity.
Change From Baseline in WPAI - Migraine Activity Impairment Scores at Weeks 4, 8, and 12 in the DBT PhaseDBT Phase: Baseline (Day 1), Weeks 4, 8, and 12The WPAI was a 6-item participant-administered questionnaire used to capture work impairment due to migraine pain. The questions are as follows: Q1 = currently employed (yes/no); Q2 = hours missed due to health problems; Q3 = hours missed due to other reasons; Q4 = hours actually worked; Q5 = degree health affected productivity while working (0-10 scale, with higher numbers indicating less productivity); Q6 = degree health affected regular activities (0-10 scale, with higher numbers indicating greater impairment of regular activities). The activity impairment score was calculated using Q6 and ranged from 0 to 100 with higher score indicating greater impairment and less productivity.
Mean Change From Baseline in Patient Global Assessment (PGA) Score in Each Month of the DBT PhaseDBT Phase: Baseline (Day 1), Months 1, 2, and 3The PGA scale was a single item assessment that measured the participant's overall assessment of migraine on a 5-point scale as: (1) very good: asymptomatic and no limitation of normal activities; (2) good: mild symptoms and no limitation of normal activities; (3) fair: moderate symptoms and limitation of some normal activities; (4) poor: severe symptoms and inability to carry out most normal activities; (5) very poor: very severe symptoms which are intolerable and inability to carry out all normal activities. Lower scores indicated fewer symptoms and less disability to carry out normal activities.

Countries

Australia, Austria, Belgium, Canada, Denmark, Finland, Germany, Italy, Mexico, Poland, Spain, Sweden, United Kingdom, United States

Contacts

STUDY_DIRECTORPfizer CT.gov Call Center

Pfizer

Participant flow

Pre-assignment details

A total of 962 participants signed the informed consent form and were enrolled in the study. Of the enrolled participants, 658 participants were randomized in the study and 304 were not randomized (due to failure to meet eligibility criteria at screening \[282 participants\], withdrawal of consent \[21 participants\], or adverse event \[1 participant\]).

Baseline characteristics

Characteristic
Age, Continuous41.98 Years
STANDARD_DEVIATION 11.14
Ethnicity (NIH/OMB)
Hispanic or Latino
4 Participants
Ethnicity (NIH/OMB)
Not Hispanic or Latino
16 Participants
Ethnicity (NIH/OMB)
Unknown or Not Reported
0 Participants
Race (NIH/OMB)
American Indian or Alaska Native
0 Participants
Race (NIH/OMB)
Asian
2 Participants
Race (NIH/OMB)
Black or African American
1 Participants
Race (NIH/OMB)
More than one race
0 Participants
Race (NIH/OMB)
Native Hawaiian or Other Pacific Islander
0 Participants
Race (NIH/OMB)
Unknown or Not Reported
0 Participants
Race (NIH/OMB)
White
33 Participants
Sex: Female, Male
Female
561 Participants
Sex: Female, Male
Male
39 Participants

Adverse events

Event typeEG000
affected / at risk
EG001
affected / at risk
EG002
affected / at risk
EG003
affected / at risk
EG004
affected / at risk
EG005
affected / at risk
deaths
Total, all-cause mortality
0 / 3280 / 3240 / 3010 / 2940 / 3080 / 296
other
Total, other adverse events
43 / 32851 / 32422 / 30112 / 2941 / 3082 / 296
serious
Total, serious adverse events
1 / 3285 / 3242 / 3014 / 2941 / 3082 / 296

Outcome results

None listed

Source: ClinicalTrials.gov · Data processed: May 23, 2026