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A Multicenter Assessment of ALD403 in Chronic Migraine

A Parallel Group, Double-Blind, Randomized, Placebo Controlled, Dose-Ranging Phase 2 Trial to Evaluate the Efficacy, Safety, and Pharmacokinetics of ALD403 Administered Intravenously in Patients With Chronic Migraine

Status
Completed
Phases
Phase 2
Study type
Interventional
Source
ClinicalTrials.gov
Registry ID
NCT02275117
Enrollment
665
Registered
2014-10-27
Start date
2014-10-31
Completion date
2016-11-30
Last updated
2020-04-08

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

Conditions

Migraine Disorders

Keywords

Migraine Disorders, ALD403

Brief summary

The purpose of this study is to assess ALD403 in the prevention of migraine headache in chronic migraineurs.

Interventions

BIOLOGICALALD403
BIOLOGICALPlacebo

Sponsors

Alder Biopharmaceuticals, Inc.
Lead SponsorINDUSTRY

Study design

Allocation
RANDOMIZED
Intervention model
PARALLEL
Primary purpose
PREVENTION
Masking
DOUBLE (Subject, Investigator)

Eligibility

Sex/Gender
ALL
Age
18 Years to 55 Years
Healthy volunteers
No

Inclusion criteria

* Diagnosis of migraine at ≤ 35 years of age with history of chronic migraine ≥ 1 year * During the 28 day screening period, must have ≥ 15 headache days of which ≥ 8 days were assessed as migraine days with at least 5 migraine attacks as recorded in the eDiary * Headache eDiary was completed on at least 22 of the 28 days prior to randomization

Exclusion criteria

* Confounding pain syndromes (e.g. fibromyalgia, chronic low back pain, complex regional pain syndrome) or any pain syndrome that requires regular analgesia * Psychiatric conditions that are uncontrolled and untreated, including conditions that are not controlled for a minimum of 6 months prior to screening. * History or diagnosis of complicated migraine (ICHD-III beta version, 2013), chronic tension-type headache, hypnic headache, cluster headache, hemicrania continua, new daily persistent headache, migraine with brainstem aura, sporadic and familial hemiplegic migraine * Unable to differentiate migraine from other headaches * Subject has received botulinum toxin for migraine or for any other medical/cosmetic reasons requiring injections in the head, face, or neck within 4 months prior to screening. * Have any clinically significant concurrent medical condition * Receipt of any monoclonal antibody treatment within 6 months of screening (within or outside a clinical trial) * Previously dosed with ALD403 or any monoclonal antibody targeting the CGRP pathway

Design outcomes

Primary

MeasureTime frameDescription
75% Migraine Responder Rate12 WeeksParticipants with an average reduction in migraine days of at least 75% over Weeks 1 to 12, as compared with baseline.

Secondary

MeasureTime frameDescription
50% Headache Responder RateWeeks 1-12Participants with an average reduction in headache days of at least 50% over Weeks 1 to 12, as compared with baseline
100% Headache Responder RateWeeks 1-12Participants with an average reduction in headache days of at least 100% over Weeks 1 to 12, as compared with baseline
100% Migraine Responder RateWeeks 1-12Participants with an average reduction in migraine days of at least 100% over Weeks 1 to 12, as compared with baseline
The Change From Baseline in Monthly Headache Days, Weeks 1-12Weeks 1-12Monthly headache days, as measured by eDiary. 4-weekly intervals averaged across weeks 1-12.
The Change From Baseline in Monthly Migraine Days, Weeks 1-12Weeks 1-12Monthly migraine days, as measured by eDiary. 4-weekly intervals averaged across weeks 1-12.
Change From Baseline in Percentage of Severe MigrainesWeeks 1-12The change from baseline in percentage of migraines that are classified as severe over Weeks 1-12
Change From Baseline in Percentage of Severe HeadachesWeeks 9-12The change from baseline in percentage of headaches that are classified as severe over Weeks 9-12
The Change From Baseline to Week 12 in HIT-6 Total ScoreBaseline to 12The HIT-6 measures the impact of headache on the participant's functional health and well-being in 6 domains: pain; role functioning (ability to carry out usual activities); social functioning; energy or fatigue; cognition; and emotional distress assessed over the prior 12-week period. The total possible scores range from 36 (no impact) to 78 (worst impact). A score of 60 or above is labeled as severe.
Percent Change From Baseline in Headache DaysWeeks 1-12Monthly headache days, as measured by eDiary. 4-weekly intervals averaged across weeks 1-12.
50% Migraine Responder RateWeeks 1-12Participants with an average reduction in migraine days of at least 50% over Weeks 1 to 12, as compared with baseline
Time to First Migraine After DosingBaseline to Week 49 (End of Study)The median number of days after dosing a participant had the next migraine using the eDiary as the recall method
Change From Baseline in Monthly Migraine Attacks, Weeks 1-12Weeks 1-12The number of monthly migraine attacks summarized over Weeks 1-12. A migraine attack is defined as 1 continuously recorded migraine. One attack may result in multiple migraine days
Change From Baseline in Monthly Headache Episodes, Weeks 1-12Weeks 1-12The number of monthly headache episodes as summarized over Weeks 1-12. A headache episode is defined as 1 continuously recorded headache. One episode may result in multiple headache days
Change From Baseline in Monthly Migraine Hours, Weeks 1-12Weeks 1-12Migraine hours are the sum of the duration of migraines within 4 week intervals, and the average 4 week duration within 12 week intervals.
Change From Baseline in Monthly Headache Hours, Weeks 1-12Weeks 1-12Headache hours are the sum of the duration of headaches within 4 week intervals, and the average 4 week duration within 12 week intervals.
Change From Baseline to Weeks 9-12 in Percentage of Migraines With Use of Acute MedicationWeeks 9-12The percent of migraines with acute medication usage. Participants with no migraines will be included with a rate of zero.
Change From Baseline to Weeks 9-12 in Percentage of Headaches With Use of Acute MedicationWeeks 9-12The percent of headaches with acute medication usage. Participants with no headaches will be included with a rate of zero.
Baseline and Change From Baseline in Short Form Health Survey (SF-36, Version 2.0) at Week 12Baseline to Week 12The SF-36 is a health survey containing 36 questions consisting of eight scaled scores to measure quality of life over the past 4 weeks (range: 0=worst to 100=best). Increases from baseline indicate improvement.
Percent Change From Baseline in Migraine DaysWeeks 1-12Monthly migraine days, as measured by eDiary. 4-weekly intervals averaged across weeks 1-12.

Countries

Australia, Georgia, New Zealand, United States

Participant flow

Pre-assignment details

A total of 1552 participants signed the ICF, of which 665 participants met the entry criteria and were randomized into the trial.

Participants by arm

ArmCount
300 mg ALD403
Participants received a single 300 mg IV infusion of ALD403 on Day 0
121
100 mg ALD403
Participants received a single 100 mg IV infusion of ALD403 on Day 0
122
30 mg ALD403
Participants received a single 30 mg IV infusion of ALD403 on Day 0
122
10 mg ALD403
Participants received a single 10 mg IV infusion of ALD403 on Day 0
130
Placebo
Participants received a single placebo IV infusion on Day 0
121
Total616

Withdrawals & dropouts

PeriodReasonFG000FG001FG002FG003FG004
Overall StudyAdverse Event00001
Overall StudyLack of Efficacy675210
Overall StudyLost to Follow-up111615168
Overall StudyOther10002
Overall StudyPhysician Decision01101
Overall StudyProtocol Violation10110
Overall StudyStudy Burden54757
Overall StudyTerminated by Sponsor44464
Overall StudyWithdrawal by Subject64733
Overall StudyWorsening of Study Indication01200

Baseline characteristics

Characteristic300 mg ALD403100 mg ALD40330 mg ALD40310 mg ALD403PlaceboTotal
Age, Continuous37.2 years
STANDARD_DEVIATION 10
36.7 years
STANDARD_DEVIATION 9.4
35.7 years
STANDARD_DEVIATION 9.4
36.4 years
STANDARD_DEVIATION 10.3
37.2 years
STANDARD_DEVIATION 9.2
36.6 years
STANDARD_DEVIATION 19.7
Baseline Migraine Days
< 20 days
84 Participants85 Participants87 Participants90 Participants84 Participants430 Participants
Baseline Migraine Days
≥ 20 days
37 Participants37 Participants35 Participants40 Participants37 Participants186 Participants
Ethnicity (NIH/OMB)
Hispanic or Latino
18 Participants23 Participants17 Participants27 Participants16 Participants101 Participants
Ethnicity (NIH/OMB)
Not Hispanic or Latino
103 Participants99 Participants105 Participants103 Participants105 Participants515 Participants
Ethnicity (NIH/OMB)
Unknown or Not Reported
0 Participants0 Participants0 Participants0 Participants0 Participants0 Participants
Medication Overuse Status
No
56 Participants62 Participants57 Participants64 Participants57 Participants296 Participants
Medication Overuse Status
Yes
65 Participants60 Participants65 Participants66 Participants64 Participants320 Participants
Race (NIH/OMB)
American Indian or Alaska Native
0 Participants0 Participants1 Participants2 Participants1 Participants4 Participants
Race (NIH/OMB)
Asian
1 Participants0 Participants0 Participants1 Participants1 Participants3 Participants
Race (NIH/OMB)
Black or African American
4 Participants12 Participants14 Participants12 Participants7 Participants49 Participants
Race (NIH/OMB)
More than one race
0 Participants0 Participants0 Participants0 Participants0 Participants0 Participants
Race (NIH/OMB)
Native Hawaiian or Other Pacific Islander
0 Participants0 Participants1 Participants0 Participants0 Participants1 Participants
Race (NIH/OMB)
Unknown or Not Reported
2 Participants2 Participants3 Participants2 Participants3 Participants12 Participants
Race (NIH/OMB)
White
114 Participants108 Participants103 Participants113 Participants109 Participants547 Participants
Region of Enrollment
Australia
2 participants6 participants1 participants5 participants5 participants19 participants
Region of Enrollment
Georgia
11 participants9 participants14 participants9 participants15 participants58 participants
Region of Enrollment
New Zealand
7 participants1 participants0 participants1 participants2 participants11 participants
Region of Enrollment
United States
101 participants106 participants107 participants115 participants99 participants528 participants
Sex: Female, Male
Female
98 Participants104 Participants111 Participants113 Participants109 Participants535 Participants
Sex: Female, Male
Male
23 Participants18 Participants11 Participants17 Participants12 Participants81 Participants

Adverse events

Event typeEG000
affected / at risk
EG001
affected / at risk
EG002
affected / at risk
EG003
affected / at risk
EG004
affected / at risk
deaths
Total, all-cause mortality
0 / 1210 / 1220 / 1220 / 1300 / 121
other
Total, other adverse events
40 / 12138 / 12226 / 12235 / 13037 / 122
serious
Total, serious adverse events
7 / 1214 / 1220 / 1221 / 1301 / 121

Outcome results

Primary

75% Migraine Responder Rate

Participants with an average reduction in migraine days of at least 75% over Weeks 1 to 12, as compared with baseline.

Time frame: 12 Weeks

Population: Modified Full Analysis Population - Randomized participants who received investigational product or placebo, excluding participants from a site that was terminated by the Sponsor.

ArmMeasureValue (COUNT_OF_PARTICIPANTS)
300 mg ALD40375% Migraine Responder Rate38 Participants
100 mg ALD40375% Migraine Responder Rate37 Participants
30 mg ALD40375% Migraine Responder Rate33 Participants
10 mg ALD40375% Migraine Responder Rate33 Participants
Placebo75% Migraine Responder Rate24 Participants
p-value: 0.03395% CI: [1.3, 24]Cochran-Mantel-Haenszel
p-value: 0.071595% CI: [-0.5, 21.8]Cochran-Mantel-Haenszel
p-value: 0.201395% CI: [-3.5, 18.5]Cochran-Mantel-Haenszel
p-value: 0.293895% CI: [-4.6, 16.9]Cochran-Mantel-Haenszel
Secondary

100% Headache Responder Rate

Participants with an average reduction in headache days of at least 100% over Weeks 1 to 12, as compared with baseline

Time frame: Weeks 1-12

Population: Modified Full Analysis Population - Randomized participants who received investigational product or placebo, excluding participants from a site that was terminated by the Sponsor.

ArmMeasureValue (COUNT_OF_PARTICIPANTS)
300 mg ALD403100% Headache Responder Rate4 Participants
100 mg ALD403100% Headache Responder Rate0 Participants
30 mg ALD403100% Headache Responder Rate0 Participants
10 mg ALD403100% Headache Responder Rate1 Participants
Placebo100% Headache Responder Rate1 Participants
Secondary

100% Migraine Responder Rate

Participants with an average reduction in migraine days of at least 100% over Weeks 1 to 12, as compared with baseline

Time frame: Weeks 1-12

Population: Modified Full Analysis Population - Randomized participants who received investigational product or placebo, excluding participants from a site that was terminated by the Sponsor.

ArmMeasureValue (COUNT_OF_PARTICIPANTS)
300 mg ALD403100% Migraine Responder Rate9 Participants
100 mg ALD403100% Migraine Responder Rate6 Participants
30 mg ALD403100% Migraine Responder Rate5 Participants
10 mg ALD403100% Migraine Responder Rate10 Participants
Placebo100% Migraine Responder Rate3 Participants
Secondary

50% Headache Responder Rate

Participants with an average reduction in headache days of at least 50% over Weeks 1 to 12, as compared with baseline

Time frame: Weeks 1-12

Population: Modified Full Analysis Population - Randomized participants who received investigational product or placebo, excluding participants from a site that was terminated by the Sponsor.

ArmMeasureValue (COUNT_OF_PARTICIPANTS)
300 mg ALD40350% Headache Responder Rate59 Participants
100 mg ALD40350% Headache Responder Rate55 Participants
30 mg ALD40350% Headache Responder Rate55 Participants
10 mg ALD40350% Headache Responder Rate48 Participants
Placebo50% Headache Responder Rate39 Participants
Secondary

50% Migraine Responder Rate

Participants with an average reduction in migraine days of at least 50% over Weeks 1 to 12, as compared with baseline

Time frame: Weeks 1-12

Population: Modified Full Analysis Population - Randomized participants who received investigational product or placebo, excluding participants from a site that was terminated by the Sponsor.

ArmMeasureValue (COUNT_OF_PARTICIPANTS)
300 mg ALD40350% Migraine Responder Rate65 Participants
100 mg ALD40350% Migraine Responder Rate65 Participants
30 mg ALD40350% Migraine Responder Rate65 Participants
10 mg ALD40350% Migraine Responder Rate54 Participants
Placebo50% Migraine Responder Rate47 Participants
Secondary

Baseline and Change From Baseline in Short Form Health Survey (SF-36, Version 2.0) at Week 12

The SF-36 is a health survey containing 36 questions consisting of eight scaled scores to measure quality of life over the past 4 weeks (range: 0=worst to 100=best). Increases from baseline indicate improvement.

Time frame: Baseline to Week 12

Population: Modified Full Analysis Population - Randomized participants who received investigational product or placebo, excluding participants from a site that was terminated by the Sponsor.

ArmMeasureGroupValue (MEAN)Dispersion
300 mg ALD403Baseline and Change From Baseline in Short Form Health Survey (SF-36, Version 2.0) at Week 12Social Functioning - Baseline45.0 SF-36 ScoreStandard Deviation 10.8
300 mg ALD403Baseline and Change From Baseline in Short Form Health Survey (SF-36, Version 2.0) at Week 12Role Emotional - Baseline50.2 SF-36 ScoreStandard Deviation 9.1
300 mg ALD403Baseline and Change From Baseline in Short Form Health Survey (SF-36, Version 2.0) at Week 12Bodily Pain -Baseline42.7 SF-36 ScoreStandard Deviation 9.5
300 mg ALD403Baseline and Change From Baseline in Short Form Health Survey (SF-36, Version 2.0) at Week 12Physical Component Score - Baseline45.5 SF-36 ScoreStandard Deviation 8.4
300 mg ALD403Baseline and Change From Baseline in Short Form Health Survey (SF-36, Version 2.0) at Week 12Physical Functioning - Week 1253.6 SF-36 ScoreStandard Deviation 5
300 mg ALD403Baseline and Change From Baseline in Short Form Health Survey (SF-36, Version 2.0) at Week 12Mental Component Score - Baseline50.4 SF-36 ScoreStandard Deviation 9.4
300 mg ALD403Baseline and Change From Baseline in Short Form Health Survey (SF-36, Version 2.0) at Week 12Role Physical - Baseline43.9 SF-36 ScoreStandard Deviation 9.5
300 mg ALD403Baseline and Change From Baseline in Short Form Health Survey (SF-36, Version 2.0) at Week 12Bodily Pain - Week 1248.9 SF-36 ScoreStandard Deviation 8.4
300 mg ALD403Baseline and Change From Baseline in Short Form Health Survey (SF-36, Version 2.0) at Week 12Social Functioning - Week 1250.5 SF-36 ScoreStandard Deviation 8.1
300 mg ALD403Baseline and Change From Baseline in Short Form Health Survey (SF-36, Version 2.0) at Week 12Physical Component Score - Week 1251.2 SF-36 ScoreStandard Deviation 6.8
300 mg ALD403Baseline and Change From Baseline in Short Form Health Survey (SF-36, Version 2.0) at Week 12Mental Health - Week 1252.1 SF-36 ScoreStandard Deviation 8.8
300 mg ALD403Baseline and Change From Baseline in Short Form Health Survey (SF-36, Version 2.0) at Week 12Physical Functioning - Baseline50.5 SF-36 ScoreStandard Deviation 8.7
300 mg ALD403Baseline and Change From Baseline in Short Form Health Survey (SF-36, Version 2.0) at Week 12General Health - Baseline50.4 SF-36 ScoreStandard Deviation 9.2
300 mg ALD403Baseline and Change From Baseline in Short Form Health Survey (SF-36, Version 2.0) at Week 12Mental Health - Baseline51.4 SF-36 ScoreStandard Deviation 8.4
300 mg ALD403Baseline and Change From Baseline in Short Form Health Survey (SF-36, Version 2.0) at Week 12Mental Component Score - Week 1251.2 SF-36 ScoreStandard Deviation 9
300 mg ALD403Baseline and Change From Baseline in Short Form Health Survey (SF-36, Version 2.0) at Week 12General Health - Week 1251.8 SF-36 ScoreStandard Deviation 8.7
300 mg ALD403Baseline and Change From Baseline in Short Form Health Survey (SF-36, Version 2.0) at Week 12Vitality - Week 1251.3 SF-36 ScoreStandard Deviation 7.8
300 mg ALD403Baseline and Change From Baseline in Short Form Health Survey (SF-36, Version 2.0) at Week 12Role Physical - Week 1250.9 SF-36 ScoreStandard Deviation 7.2
300 mg ALD403Baseline and Change From Baseline in Short Form Health Survey (SF-36, Version 2.0) at Week 12Role Emotional - Week 1251.4 SF-36 ScoreStandard Deviation 8.2
300 mg ALD403Baseline and Change From Baseline in Short Form Health Survey (SF-36, Version 2.0) at Week 12Vitality - Baseline48.3 SF-36 ScoreStandard Deviation 8.9
100 mg ALD403Baseline and Change From Baseline in Short Form Health Survey (SF-36, Version 2.0) at Week 12Role Emotional - Baseline49.4 SF-36 ScoreStandard Deviation 9.6
100 mg ALD403Baseline and Change From Baseline in Short Form Health Survey (SF-36, Version 2.0) at Week 12Vitality - Baseline50.1 SF-36 ScoreStandard Deviation 10.6
100 mg ALD403Baseline and Change From Baseline in Short Form Health Survey (SF-36, Version 2.0) at Week 12Social Functioning - Week 1248.7 SF-36 ScoreStandard Deviation 10.1
100 mg ALD403Baseline and Change From Baseline in Short Form Health Survey (SF-36, Version 2.0) at Week 12Vitality - Week 1250.9 SF-36 ScoreStandard Deviation 10.5
100 mg ALD403Baseline and Change From Baseline in Short Form Health Survey (SF-36, Version 2.0) at Week 12Physical Functioning - Week 1251.2 SF-36 ScoreStandard Deviation 8.3
100 mg ALD403Baseline and Change From Baseline in Short Form Health Survey (SF-36, Version 2.0) at Week 12Social Functioning - Baseline46.3 SF-36 ScoreStandard Deviation 10.1
100 mg ALD403Baseline and Change From Baseline in Short Form Health Survey (SF-36, Version 2.0) at Week 12Physical Component Score - Week 1249.0 SF-36 ScoreStandard Deviation 8.6
100 mg ALD403Baseline and Change From Baseline in Short Form Health Survey (SF-36, Version 2.0) at Week 12Mental Component Score - Week 1250.5 SF-36 ScoreStandard Deviation 9.7
100 mg ALD403Baseline and Change From Baseline in Short Form Health Survey (SF-36, Version 2.0) at Week 12Role Physical - Baseline45.2 SF-36 ScoreStandard Deviation 9.3
100 mg ALD403Baseline and Change From Baseline in Short Form Health Survey (SF-36, Version 2.0) at Week 12Mental Component Score - Baseline50.9 SF-36 ScoreStandard Deviation 9.7
100 mg ALD403Baseline and Change From Baseline in Short Form Health Survey (SF-36, Version 2.0) at Week 12Role Physical - Week 1248.9 SF-36 ScoreStandard Deviation 9.3
100 mg ALD403Baseline and Change From Baseline in Short Form Health Survey (SF-36, Version 2.0) at Week 12Physical Functioning - Baseline50.6 SF-36 ScoreStandard Deviation 7.8
100 mg ALD403Baseline and Change From Baseline in Short Form Health Survey (SF-36, Version 2.0) at Week 12Bodily Pain -Baseline42.7 SF-36 ScoreStandard Deviation 9.6
100 mg ALD403Baseline and Change From Baseline in Short Form Health Survey (SF-36, Version 2.0) at Week 12General Health - Baseline50.7 SF-36 ScoreStandard Deviation 9.8
100 mg ALD403Baseline and Change From Baseline in Short Form Health Survey (SF-36, Version 2.0) at Week 12Mental Health - Week 1250.8 SF-36 ScoreStandard Deviation 10.1
100 mg ALD403Baseline and Change From Baseline in Short Form Health Survey (SF-36, Version 2.0) at Week 12Bodily Pain - Week 1246.5 SF-36 ScoreStandard Deviation 9.9
100 mg ALD403Baseline and Change From Baseline in Short Form Health Survey (SF-36, Version 2.0) at Week 12Mental Health - Baseline52.0 SF-36 ScoreStandard Deviation 9.3
100 mg ALD403Baseline and Change From Baseline in Short Form Health Survey (SF-36, Version 2.0) at Week 12Role Emotional - Week 1250.2 SF-36 ScoreStandard Deviation 9
100 mg ALD403Baseline and Change From Baseline in Short Form Health Survey (SF-36, Version 2.0) at Week 12General Health - Week 1250.7 SF-36 ScoreStandard Deviation 10.2
100 mg ALD403Baseline and Change From Baseline in Short Form Health Survey (SF-36, Version 2.0) at Week 12Physical Component Score - Baseline46.1 SF-36 ScoreStandard Deviation 8.4
30 mg ALD403Baseline and Change From Baseline in Short Form Health Survey (SF-36, Version 2.0) at Week 12Mental Component Score - Week 1250.7 SF-36 ScoreStandard Deviation 9.4
30 mg ALD403Baseline and Change From Baseline in Short Form Health Survey (SF-36, Version 2.0) at Week 12General Health - Baseline50.9 SF-36 ScoreStandard Deviation 8.7
30 mg ALD403Baseline and Change From Baseline in Short Form Health Survey (SF-36, Version 2.0) at Week 12Physical Functioning - Baseline51.1 SF-36 ScoreStandard Deviation 7.6
30 mg ALD403Baseline and Change From Baseline in Short Form Health Survey (SF-36, Version 2.0) at Week 12Physical Functioning - Week 1252.5 SF-36 ScoreStandard Deviation 7.2
30 mg ALD403Baseline and Change From Baseline in Short Form Health Survey (SF-36, Version 2.0) at Week 12Role Physical - Baseline45.6 SF-36 ScoreStandard Deviation 9.3
30 mg ALD403Baseline and Change From Baseline in Short Form Health Survey (SF-36, Version 2.0) at Week 12Role Physical - Week 1249.9 SF-36 ScoreStandard Deviation 7.7
30 mg ALD403Baseline and Change From Baseline in Short Form Health Survey (SF-36, Version 2.0) at Week 12Bodily Pain -Baseline44.5 SF-36 ScoreStandard Deviation 9.9
30 mg ALD403Baseline and Change From Baseline in Short Form Health Survey (SF-36, Version 2.0) at Week 12Bodily Pain - Week 1248.1 SF-36 ScoreStandard Deviation 9.2
30 mg ALD403Baseline and Change From Baseline in Short Form Health Survey (SF-36, Version 2.0) at Week 12General Health - Week 1250.7 SF-36 ScoreStandard Deviation 9.2
30 mg ALD403Baseline and Change From Baseline in Short Form Health Survey (SF-36, Version 2.0) at Week 12Vitality - Baseline49.6 SF-36 ScoreStandard Deviation 9.8
30 mg ALD403Baseline and Change From Baseline in Short Form Health Survey (SF-36, Version 2.0) at Week 12Vitality - Week 1250.6 SF-36 ScoreStandard Deviation 11.3
30 mg ALD403Baseline and Change From Baseline in Short Form Health Survey (SF-36, Version 2.0) at Week 12Social Functioning - Baseline46.8 SF-36 ScoreStandard Deviation 10.7
30 mg ALD403Baseline and Change From Baseline in Short Form Health Survey (SF-36, Version 2.0) at Week 12Social Functioning - Week 1249.5 SF-36 ScoreStandard Deviation 9
30 mg ALD403Baseline and Change From Baseline in Short Form Health Survey (SF-36, Version 2.0) at Week 12Role Emotional - Baseline49.4 SF-36 ScoreStandard Deviation 9.7
30 mg ALD403Baseline and Change From Baseline in Short Form Health Survey (SF-36, Version 2.0) at Week 12Role Emotional - Week 1251.2 SF-36 ScoreStandard Deviation 7.2
30 mg ALD403Baseline and Change From Baseline in Short Form Health Survey (SF-36, Version 2.0) at Week 12Mental Health - Baseline51.8 SF-36 ScoreStandard Deviation 9.5
30 mg ALD403Baseline and Change From Baseline in Short Form Health Survey (SF-36, Version 2.0) at Week 12Mental Health - Week 1251.2 SF-36 ScoreStandard Deviation 9.5
30 mg ALD403Baseline and Change From Baseline in Short Form Health Survey (SF-36, Version 2.0) at Week 12Mental Component Score - Baseline50.5 SF-36 ScoreStandard Deviation 9.6
30 mg ALD403Baseline and Change From Baseline in Short Form Health Survey (SF-36, Version 2.0) at Week 12Physical Component Score - Baseline47.1 SF-36 ScoreStandard Deviation 7.7
30 mg ALD403Baseline and Change From Baseline in Short Form Health Survey (SF-36, Version 2.0) at Week 12Physical Component Score - Week 1250.1 SF-36 ScoreStandard Deviation 7
10 mg ALD403Baseline and Change From Baseline in Short Form Health Survey (SF-36, Version 2.0) at Week 12Vitality - Baseline49.4 SF-36 ScoreStandard Deviation 10.1
10 mg ALD403Baseline and Change From Baseline in Short Form Health Survey (SF-36, Version 2.0) at Week 12Physical Component Score - Baseline46.1 SF-36 ScoreStandard Deviation 8.3
10 mg ALD403Baseline and Change From Baseline in Short Form Health Survey (SF-36, Version 2.0) at Week 12Role Emotional - Baseline49.8 SF-36 ScoreStandard Deviation 10.3
10 mg ALD403Baseline and Change From Baseline in Short Form Health Survey (SF-36, Version 2.0) at Week 12General Health - Week 1252.7 SF-36 ScoreStandard Deviation 9.8
10 mg ALD403Baseline and Change From Baseline in Short Form Health Survey (SF-36, Version 2.0) at Week 12Role Emotional - Week 1250.9 SF-36 ScoreStandard Deviation 8.4
10 mg ALD403Baseline and Change From Baseline in Short Form Health Survey (SF-36, Version 2.0) at Week 12General Health - Baseline51.1 SF-36 ScoreStandard Deviation 9.5
10 mg ALD403Baseline and Change From Baseline in Short Form Health Survey (SF-36, Version 2.0) at Week 12Physical Functioning - Baseline50.3 SF-36 ScoreStandard Deviation 8.4
10 mg ALD403Baseline and Change From Baseline in Short Form Health Survey (SF-36, Version 2.0) at Week 12Mental Health - Baseline51.4 SF-36 ScoreStandard Deviation 9.5
10 mg ALD403Baseline and Change From Baseline in Short Form Health Survey (SF-36, Version 2.0) at Week 12Bodily Pain - Week 1246.6 SF-36 ScoreStandard Deviation 9.3
10 mg ALD403Baseline and Change From Baseline in Short Form Health Survey (SF-36, Version 2.0) at Week 12Mental Health - Week 1252.2 SF-36 ScoreStandard Deviation 9.5
10 mg ALD403Baseline and Change From Baseline in Short Form Health Survey (SF-36, Version 2.0) at Week 12Bodily Pain -Baseline43.0 SF-36 ScoreStandard Deviation 9.6
10 mg ALD403Baseline and Change From Baseline in Short Form Health Survey (SF-36, Version 2.0) at Week 12Mental Component Score - Baseline50.4 SF-36 ScoreStandard Deviation 9.9
10 mg ALD403Baseline and Change From Baseline in Short Form Health Survey (SF-36, Version 2.0) at Week 12Role Physical - Baseline44.9 SF-36 ScoreStandard Deviation 9.9
10 mg ALD403Baseline and Change From Baseline in Short Form Health Survey (SF-36, Version 2.0) at Week 12Role Physical - Week 1247.9 SF-36 ScoreStandard Deviation 9.9
10 mg ALD403Baseline and Change From Baseline in Short Form Health Survey (SF-36, Version 2.0) at Week 12Mental Component Score - Week 1251.3 SF-36 ScoreStandard Deviation 9.3
10 mg ALD403Baseline and Change From Baseline in Short Form Health Survey (SF-36, Version 2.0) at Week 12Physical Functioning - Week 1251.3 SF-36 ScoreStandard Deviation 7.9
10 mg ALD403Baseline and Change From Baseline in Short Form Health Survey (SF-36, Version 2.0) at Week 12Social Functioning - Baseline45.5 SF-36 ScoreStandard Deviation 10.4
10 mg ALD403Baseline and Change From Baseline in Short Form Health Survey (SF-36, Version 2.0) at Week 12Vitality - Week 1250.7 SF-36 ScoreStandard Deviation 10.6
10 mg ALD403Baseline and Change From Baseline in Short Form Health Survey (SF-36, Version 2.0) at Week 12Physical Component Score - Week 1248.8 SF-36 ScoreStandard Deviation 8.5
10 mg ALD403Baseline and Change From Baseline in Short Form Health Survey (SF-36, Version 2.0) at Week 12Social Functioning - Week 1247.7 SF-36 ScoreStandard Deviation 9.8
PlaceboBaseline and Change From Baseline in Short Form Health Survey (SF-36, Version 2.0) at Week 12Social Functioning - Week 1248.1 SF-36 ScoreStandard Deviation 8.7
PlaceboBaseline and Change From Baseline in Short Form Health Survey (SF-36, Version 2.0) at Week 12General Health - Week 1250.6 SF-36 ScoreStandard Deviation 10
PlaceboBaseline and Change From Baseline in Short Form Health Survey (SF-36, Version 2.0) at Week 12Role Physical - Baseline44.3 SF-36 ScoreStandard Deviation 9.6
PlaceboBaseline and Change From Baseline in Short Form Health Survey (SF-36, Version 2.0) at Week 12Physical Component Score - Week 1248.4 SF-36 ScoreStandard Deviation 8.1
PlaceboBaseline and Change From Baseline in Short Form Health Survey (SF-36, Version 2.0) at Week 12Role Emotional - Baseline50.9 SF-36 ScoreStandard Deviation 8.1
PlaceboBaseline and Change From Baseline in Short Form Health Survey (SF-36, Version 2.0) at Week 12Vitality - Week 1251.1 SF-36 ScoreStandard Deviation 10.2
PlaceboBaseline and Change From Baseline in Short Form Health Survey (SF-36, Version 2.0) at Week 12General Health - Baseline50.7 SF-36 ScoreStandard Deviation 9.8
PlaceboBaseline and Change From Baseline in Short Form Health Survey (SF-36, Version 2.0) at Week 12Physical Component Score - Baseline45.5 SF-36 ScoreStandard Deviation 7.9
PlaceboBaseline and Change From Baseline in Short Form Health Survey (SF-36, Version 2.0) at Week 12Mental Component Score - Baseline50.5 SF-36 ScoreStandard Deviation 9
PlaceboBaseline and Change From Baseline in Short Form Health Survey (SF-36, Version 2.0) at Week 12Role Emotional - Week 1251.0 SF-36 ScoreStandard Deviation 8.3
PlaceboBaseline and Change From Baseline in Short Form Health Survey (SF-36, Version 2.0) at Week 12Physical Functioning - Baseline50.2 SF-36 ScoreStandard Deviation 6.5
PlaceboBaseline and Change From Baseline in Short Form Health Survey (SF-36, Version 2.0) at Week 12Bodily Pain - Week 1246.0 SF-36 ScoreStandard Deviation 9.5
PlaceboBaseline and Change From Baseline in Short Form Health Survey (SF-36, Version 2.0) at Week 12Physical Functioning - Week 1251.9 SF-36 ScoreStandard Deviation 6.1
PlaceboBaseline and Change From Baseline in Short Form Health Survey (SF-36, Version 2.0) at Week 12Vitality - Baseline48.1 SF-36 ScoreStandard Deviation 10.9
PlaceboBaseline and Change From Baseline in Short Form Health Survey (SF-36, Version 2.0) at Week 12Mental Health - Baseline50.8 SF-36 ScoreStandard Deviation 9.8
PlaceboBaseline and Change From Baseline in Short Form Health Survey (SF-36, Version 2.0) at Week 12Social Functioning - Baseline45.4 SF-36 ScoreStandard Deviation 10.3
PlaceboBaseline and Change From Baseline in Short Form Health Survey (SF-36, Version 2.0) at Week 12Bodily Pain -Baseline42.5 SF-36 ScoreStandard Deviation 9.4
PlaceboBaseline and Change From Baseline in Short Form Health Survey (SF-36, Version 2.0) at Week 12Role Physical - Week 1248.5 SF-36 ScoreStandard Deviation 8.3
PlaceboBaseline and Change From Baseline in Short Form Health Survey (SF-36, Version 2.0) at Week 12Mental Component Score - Week 1251.5 SF-36 ScoreStandard Deviation 8.9
PlaceboBaseline and Change From Baseline in Short Form Health Survey (SF-36, Version 2.0) at Week 12Mental Health - Week 1252.4 SF-36 ScoreStandard Deviation 8.8
Secondary

Change From Baseline in Monthly Headache Episodes, Weeks 1-12

The number of monthly headache episodes as summarized over Weeks 1-12. A headache episode is defined as 1 continuously recorded headache. One episode may result in multiple headache days

Time frame: Weeks 1-12

Population: Modified Full Analysis Population - Randomized participants who received investigational product or placebo, excluding participants from a site that was terminated by the Sponsor.

ArmMeasureValue (MEAN)Dispersion
300 mg ALD403Change From Baseline in Monthly Headache Episodes, Weeks 1-12-8.2 Headache EpisodesStandard Deviation 5.54
100 mg ALD403Change From Baseline in Monthly Headache Episodes, Weeks 1-12-8.0 Headache EpisodesStandard Deviation 5.37
30 mg ALD403Change From Baseline in Monthly Headache Episodes, Weeks 1-12-8.3 Headache EpisodesStandard Deviation 5.55
10 mg ALD403Change From Baseline in Monthly Headache Episodes, Weeks 1-12-7.3 Headache EpisodesStandard Deviation 5.37
PlaceboChange From Baseline in Monthly Headache Episodes, Weeks 1-12-7.0 Headache EpisodesStandard Deviation 5.13
Secondary

Change From Baseline in Monthly Headache Hours, Weeks 1-12

Headache hours are the sum of the duration of headaches within 4 week intervals, and the average 4 week duration within 12 week intervals.

Time frame: Weeks 1-12

Population: Modified Full Analysis Population - Randomized participants who received investigational product or placebo, excluding participants from a site that was terminated by the Sponsor.

ArmMeasureValue (MEAN)Dispersion
300 mg ALD403Change From Baseline in Monthly Headache Hours, Weeks 1-12-73.9 Headache HoursStandard Deviation 101.53
100 mg ALD403Change From Baseline in Monthly Headache Hours, Weeks 1-12-60.9 Headache HoursStandard Deviation 114.77
30 mg ALD403Change From Baseline in Monthly Headache Hours, Weeks 1-12-62.9 Headache HoursStandard Deviation 81.89
10 mg ALD403Change From Baseline in Monthly Headache Hours, Weeks 1-12-47.5 Headache HoursStandard Deviation 102.84
PlaceboChange From Baseline in Monthly Headache Hours, Weeks 1-12-38.7 Headache HoursStandard Deviation 99.26
Secondary

Change From Baseline in Monthly Migraine Attacks, Weeks 1-12

The number of monthly migraine attacks summarized over Weeks 1-12. A migraine attack is defined as 1 continuously recorded migraine. One attack may result in multiple migraine days

Time frame: Weeks 1-12

Population: Modified Full Analysis Population - Randomized participants who received investigational product or placebo, excluding participants from a site that was terminated by the Sponsor.

ArmMeasureValue (MEAN)Dispersion
300 mg ALD403Change From Baseline in Monthly Migraine Attacks, Weeks 1-12-6.8 Migraine AttacksStandard Deviation 5.4
100 mg ALD403Change From Baseline in Monthly Migraine Attacks, Weeks 1-12-6.5 Migraine AttacksStandard Deviation 4.9
30 mg ALD403Change From Baseline in Monthly Migraine Attacks, Weeks 1-12-6.9 Migraine AttacksStandard Deviation 5
10 mg ALD403Change From Baseline in Monthly Migraine Attacks, Weeks 1-12-6.2 Migraine AttacksStandard Deviation 5.2
PlaceboChange From Baseline in Monthly Migraine Attacks, Weeks 1-12-5.5 Migraine AttacksStandard Deviation 5
Secondary

Change From Baseline in Monthly Migraine Hours, Weeks 1-12

Migraine hours are the sum of the duration of migraines within 4 week intervals, and the average 4 week duration within 12 week intervals.

Time frame: Weeks 1-12

Population: Modified Full Analysis Population - Randomized participants who received investigational product or placebo, excluding participants from a site that was terminated by the Sponsor.

ArmMeasureValue (MEAN)Dispersion
300 mg ALD403Change From Baseline in Monthly Migraine Hours, Weeks 1-12-70.9 Migraine HoursStandard Deviation 100.34
100 mg ALD403Change From Baseline in Monthly Migraine Hours, Weeks 1-12-64.2 Migraine HoursStandard Deviation 114.58
30 mg ALD403Change From Baseline in Monthly Migraine Hours, Weeks 1-12-63.1 Migraine HoursStandard Deviation 84.56
10 mg ALD403Change From Baseline in Monthly Migraine Hours, Weeks 1-12-49.2 Migraine HoursStandard Deviation 103.83
PlaceboChange From Baseline in Monthly Migraine Hours, Weeks 1-12-34.9 Migraine HoursStandard Deviation 100.87
Secondary

Change From Baseline in Percentage of Severe Headaches

The change from baseline in percentage of headaches that are classified as severe over Weeks 9-12

Time frame: Weeks 9-12

Population: Modified Full Analysis Population - Randomized participants who received investigational product or placebo, excluding participants from a site that was terminated by the Sponsor.

ArmMeasureValue (MEAN)Dispersion
300 mg ALD403Change From Baseline in Percentage of Severe Headaches-19.91 percentage of severe headachesStandard Deviation 25.8
100 mg ALD403Change From Baseline in Percentage of Severe Headaches-10.36 percentage of severe headachesStandard Deviation 28.004
30 mg ALD403Change From Baseline in Percentage of Severe Headaches-12.17 percentage of severe headachesStandard Deviation 30.197
10 mg ALD403Change From Baseline in Percentage of Severe Headaches-11.42 percentage of severe headachesStandard Deviation 30.517
PlaceboChange From Baseline in Percentage of Severe Headaches-6.48 percentage of severe headachesStandard Deviation 27.211
Secondary

Change From Baseline in Percentage of Severe Migraines

The change from baseline in percentage of migraines that are classified as severe over Weeks 1-12

Time frame: Weeks 1-12

Population: Modified Full Analysis Population - Randomized participants who received investigational product or placebo, excluding participants from a site that was terminated by the Sponsor.

ArmMeasureValue (MEAN)Dispersion
300 mg ALD403Change From Baseline in Percentage of Severe Migraines-20.7 percentage of severe migrainesStandard Deviation 29.47
100 mg ALD403Change From Baseline in Percentage of Severe Migraines-15.9 percentage of severe migrainesStandard Deviation 27.38
30 mg ALD403Change From Baseline in Percentage of Severe Migraines-17.2 percentage of severe migrainesStandard Deviation 26.98
10 mg ALD403Change From Baseline in Percentage of Severe Migraines-16.1 percentage of severe migrainesStandard Deviation 29.8
PlaceboChange From Baseline in Percentage of Severe Migraines-9.7 percentage of severe migrainesStandard Deviation 27.32
Secondary

Change From Baseline to Weeks 9-12 in Percentage of Headaches With Use of Acute Medication

The percent of headaches with acute medication usage. Participants with no headaches will be included with a rate of zero.

Time frame: Weeks 9-12

Population: Modified Full Analysis Population - Randomized participants who received investigational product or placebo, excluding participants from a site that was terminated by the Sponsor.

ArmMeasureValue (MEAN)Dispersion
300 mg ALD403Change From Baseline to Weeks 9-12 in Percentage of Headaches With Use of Acute Medication-5.98 percentage of acute medication headachesStandard Deviation 34.144
100 mg ALD403Change From Baseline to Weeks 9-12 in Percentage of Headaches With Use of Acute Medication-3.27 percentage of acute medication headachesStandard Deviation 34.419
30 mg ALD403Change From Baseline to Weeks 9-12 in Percentage of Headaches With Use of Acute Medication1.52 percentage of acute medication headachesStandard Deviation 30.013
10 mg ALD403Change From Baseline to Weeks 9-12 in Percentage of Headaches With Use of Acute Medication-3.14 percentage of acute medication headachesStandard Deviation 32.853
PlaceboChange From Baseline to Weeks 9-12 in Percentage of Headaches With Use of Acute Medication-3.42 percentage of acute medication headachesStandard Deviation 32.89
Secondary

Change From Baseline to Weeks 9-12 in Percentage of Migraines With Use of Acute Medication

The percent of migraines with acute medication usage. Participants with no migraines will be included with a rate of zero.

Time frame: Weeks 9-12

ArmMeasureValue (MEAN)Dispersion
300 mg ALD403Change From Baseline to Weeks 9-12 in Percentage of Migraines With Use of Acute Medication-15.43 percentage of acute medication migrainesStandard Deviation 39.121
100 mg ALD403Change From Baseline to Weeks 9-12 in Percentage of Migraines With Use of Acute Medication-10.36 percentage of acute medication migrainesStandard Deviation 43.89
30 mg ALD403Change From Baseline to Weeks 9-12 in Percentage of Migraines With Use of Acute Medication-4.44 percentage of acute medication migrainesStandard Deviation 37.746
10 mg ALD403Change From Baseline to Weeks 9-12 in Percentage of Migraines With Use of Acute Medication-10.03 percentage of acute medication migrainesStandard Deviation 40.46
PlaceboChange From Baseline to Weeks 9-12 in Percentage of Migraines With Use of Acute Medication-9.60 percentage of acute medication migrainesStandard Deviation 37.451
Secondary

Percent Change From Baseline in Headache Days

Monthly headache days, as measured by eDiary. 4-weekly intervals averaged across weeks 1-12.

Time frame: Weeks 1-12

Population: Modified Full Analysis Population - Randomized participants who received investigational product or placebo, excluding participants from a site that was terminated by the Sponsor.

ArmMeasureValue (MEAN)Dispersion
300 mg ALD403Percent Change From Baseline in Headache Days-46.12 percentage of headache daysStandard Deviation 31.481
100 mg ALD403Percent Change From Baseline in Headache Days-43.09 percentage of headache daysStandard Deviation 33.912
30 mg ALD403Percent Change From Baseline in Headache Days-44.37 percentage of headache daysStandard Deviation 28.62
10 mg ALD403Percent Change From Baseline in Headache Days-37.20 percentage of headache daysStandard Deviation 34.112
PlaceboPercent Change From Baseline in Headache Days-34.02 percentage of headache daysStandard Deviation 30.97
Secondary

Percent Change From Baseline in Migraine Days

Monthly migraine days, as measured by eDiary. 4-weekly intervals averaged across weeks 1-12.

Time frame: Weeks 1-12

Population: Modified Full Analysis Population - Randomized participants who received investigational product or placebo, excluding participants from a site that was terminated by the Sponsor.

ArmMeasureValue (MEAN)Dispersion
300 mg ALD403Percent Change From Baseline in Migraine Days-48.88 percentage of migraine daysStandard Deviation 41.243
100 mg ALD403Percent Change From Baseline in Migraine Days-46.79 percentage of migraine daysStandard Deviation 40.983
30 mg ALD403Percent Change From Baseline in Migraine Days-46.74 percentage of migraine daysStandard Deviation 36.588
10 mg ALD403Percent Change From Baseline in Migraine Days-40.80 percentage of migraine daysStandard Deviation 40.133
PlaceboPercent Change From Baseline in Migraine Days-35.37 percentage of migraine daysStandard Deviation 41.1
Secondary

The Change From Baseline in Monthly Headache Days, Weeks 1-12

Monthly headache days, as measured by eDiary. 4-weekly intervals averaged across weeks 1-12.

Time frame: Weeks 1-12

Population: Modified Full Analysis Population - Randomized participants who received investigational product or placebo, excluding participants from a site that was terminated by the Sponsor.

ArmMeasureValue (MEAN)Dispersion
300 mg ALD403The Change From Baseline in Monthly Headache Days, Weeks 1-12-9.6 daysStandard Deviation 6.94
100 mg ALD403The Change From Baseline in Monthly Headache Days, Weeks 1-12-8.9 daysStandard Deviation 6.79
30 mg ALD403The Change From Baseline in Monthly Headache Days, Weeks 1-12-9.2 daysStandard Deviation 6.33
10 mg ALD403The Change From Baseline in Monthly Headache Days, Weeks 1-12-7.5 daysStandard Deviation 6.93
PlaceboThe Change From Baseline in Monthly Headache Days, Weeks 1-12-6.9 daysStandard Deviation 6.37
Secondary

The Change From Baseline in Monthly Migraine Days, Weeks 1-12

Monthly migraine days, as measured by eDiary. 4-weekly intervals averaged across weeks 1-12.

Time frame: Weeks 1-12

Population: Modified Full Analysis Population - Randomized participants who received investigational product or placebo, excluding participants from a site that was terminated by the Sponsor.

ArmMeasureValue (MEAN)Dispersion
300 mg ALD403The Change From Baseline in Monthly Migraine Days, Weeks 1-12-8.2 daysStandard Deviation 7
100 mg ALD403The Change From Baseline in Monthly Migraine Days, Weeks 1-12-7.7 daysStandard Deviation 6.87
30 mg ALD403The Change From Baseline in Monthly Migraine Days, Weeks 1-12-7.9 daysStandard Deviation 6.38
10 mg ALD403The Change From Baseline in Monthly Migraine Days, Weeks 1-12-6.7 daysStandard Deviation 6.8
PlaceboThe Change From Baseline in Monthly Migraine Days, Weeks 1-12-5.6 daysStandard Deviation 6.56
Secondary

The Change From Baseline to Week 12 in HIT-6 Total Score

The HIT-6 measures the impact of headache on the participant's functional health and well-being in 6 domains: pain; role functioning (ability to carry out usual activities); social functioning; energy or fatigue; cognition; and emotional distress assessed over the prior 12-week period. The total possible scores range from 36 (no impact) to 78 (worst impact). A score of 60 or above is labeled as severe.

Time frame: Baseline to 12

Population: Modified Full Analysis Population - Randomized participants who received investigational product or placebo, excluding participants from a site that was terminated by the Sponsor.

ArmMeasureValue (NUMBER)
300 mg ALD403The Change From Baseline to Week 12 in HIT-6 Total Score-60.4 percentage of HIT-6 total score
100 mg ALD403The Change From Baseline to Week 12 in HIT-6 Total Score-43.4 percentage of HIT-6 total score
30 mg ALD403The Change From Baseline to Week 12 in HIT-6 Total Score-34.9 percentage of HIT-6 total score
10 mg ALD403The Change From Baseline to Week 12 in HIT-6 Total Score-34.8 percentage of HIT-6 total score
PlaceboThe Change From Baseline to Week 12 in HIT-6 Total Score-28.4 percentage of HIT-6 total score
Secondary

Time to First Migraine After Dosing

The median number of days after dosing a participant had the next migraine using the eDiary as the recall method

Time frame: Baseline to Week 49 (End of Study)

Population: Modified Full Analysis Population - Randomized participants who received investigational product or placebo, excluding participants from a site that was terminated by the Sponsor.

ArmMeasureValue (NUMBER)
300 mg ALD403Time to First Migraine After Dosing4.0 Days
100 mg ALD403Time to First Migraine After Dosing4.0 Days
30 mg ALD403Time to First Migraine After Dosing3.0 Days
10 mg ALD403Time to First Migraine After Dosing4.0 Days
PlaceboTime to First Migraine After Dosing2.0 Days

Source: ClinicalTrials.gov · Data processed: Feb 21, 2026