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MigrainePhase 2NCT01952574

Study to Evaluate the Efficacy and Safety of Erenumab (AMG 334) in Migraine Prevention

A Phase 2 study testing Erenumab, Erenumab PFS and Erenumab AI/Pen in people with Migraine, run by Amgen at 66 sites in 7 countries.

Completed

Finished. The study has ended and is not enrolling. Results may be posted on the official record.

Official record
Search all trials

Trial summary

A study to evaluate the effect of erenumab compared to placebo on the change from baseline in monthly migraine days in participants with episodic migraine. Read more about this study

Who is it for?
Ages 18 to 60 years
Conditions the study is for
Migraine
What is being tested?
Erenumab, Erenumab PFS and Erenumab AI/Pen
Type of treatment
Injection or infusion
Could I receive a placebo?
Yes, some participants may receive a placebo
How many people
483 participants
Where
66 sitesin 7 countries
Study dates
6 Aug 2013to 12 Nov 2019
Phase
Phase 2
Are there results?
Yes, posted in the registrySummary in the doctors' view

Key requirements

Who can take part, as listed by the sponsor. Only the study team can confirm whether you are eligible, so take this list to your doctor.

  • Ages 18 to 60 years
  • All sexes
  • No healthy volunteers
  • Adult

Who may be able to join

  • History of migraine for more than12 months prior to screening
  • Migraine frequency: ≥ 4 and ≤ 14 migraine days per month in each of the 3 months prior to screening and during baseline phase
  • Headache frequency: < 15 headache days per month (with > 50% of the headache days being migraine days) in each of the 3 months prior to screening and during baseline phase
  • Demonstrated at least 80% compliance with the eDiary during baseline phase

Who cannot join

  • Older than 50 years of age at migraine onset
  • History of cluster headache or basilar or hemiplegic migraine headache
  • Unable to differentiate migraine from other headaches
  • No therapeutic response with > 2 of the following eight medication categories for prophylactic treatment of migraine after an adequate therapeutic trial. Medication categories are:
  • Category 1: Divalproex sodium, sodium valproate
  • Category 2: Topiramate
Show all 13Show fewer
  • Category 3: Beta blockers (for example: atenolol, bisoprolol, metoprolol, nadolol, nebivolol, pindolol, propranolol, timolol)
  • Category 4: Tricyclic antidepressants (for example: amitriptyline, nortriptyline, protriptyline)
  • Category 5: Venlafaxine, desvenlafaxine, duloxetine, milnacipran
  • Category 6: Flunarizine, verapamil
  • Category 7: Lisinopril, candesartan
  • Category 8: Butterbur, feverfew, magnesium (≥ 600 mg/day), riboflavin (≥ 100 mg/day)
  • Overuse of acute migraine medications in any month during the 3 months prior to screening or during screening

Trial locations and contacts

66 sites in 7 countries.

66 sites in 7 countries

United States41 sites
  • Research Site

    Ann Arbor, Michigan, 48104

  • Research Site

    Arlington, Texas, 76017

  • Research Site

    Austin, Texas, 78731

  • Research Site

    Bradenton, Florida, 34205

  • Research Site

    Dallas, Texas, 75214

  • Research Site

    Dallas, Texas, 75231

  • Research Site

    Danbury, Connecticut, 06810

  • Research Site

    Decatur, Georgia, 30033

  • Research Site

    Fairfield, Connecticut, 06824

  • Research Site

    Falls Church, Virginia, 22042

  • Research Site

    Greensboro, North Carolina, 27405

  • Research Site

    Houston, Texas, 77074

  • Research Site

    Kalamazoo, Michigan, 49009

  • Research Site

    Lexington, Kentucky, 40513

  • Research Site

    Long Beach, California, 90806

  • Research Site

    Louisville, Kentucky, 40213

  • Research Site

    Melbourne, Florida, 32935

  • Research Site

    Nashville, Tennessee, 37203

  • Research Site

    National City, California, 91950

  • Research Site

    Newport Beach, California, 92663

  • Research Site

    Palm Beach Gardens, Florida, 33410

  • Research Site

    Philadelphia, Pennsylvania, 19107

  • Research Site

    Phoenix, Arizona, 85032

  • Research Site

    Plymouth, Minnesota, 55441

  • Research Site

    Raleigh, North Carolina, 27612

  • Research Site

    Rochester, New York, 14609

  • Research Site

    Salt Lake City, Utah, 84106

  • Research Site

    Salt Lake City, Utah, 84124

  • Research Site

    San Francisco, California, 94109

  • Research Site

    Santa Monica, California, 90404

  • Research Site

    Sherman Oaks, California, 91403

  • Research Site

    Southfield, Michigan, 48034

  • Research Site

    Spring Valley, California, 91978

  • Research Site

    Springfield, Missouri, 65807

  • Research Site

    St Louis, Missouri, 63141

  • Research Site

    Stamford, Connecticut, 06905

  • Research Site

    Virginia Beach, Virginia, 23454

  • Research Site

    Watertown, Massachusetts, 02472

  • Research Site

    West Palm Beach, Florida, 33407

  • Research Site

    Wichita, Kansas, 67207

  • Research Site

    Worcester, Massachusetts, 01605

Other trials in United States

Germany7 sites
  • Research Site

    Berlin, 10117

  • Research Site

    Berlin, 10409

  • Research Site

    Berlin, 10435

  • Research Site

    Bochum, 44789

  • Research Site

    Essen, 45133

  • Research Site

    Hamburg, 20246

  • Research Site

    Leipzig, 04107

Other trials in Germany

Finland5 sites
  • Research Site

    Helsinki, 00100

  • Research Site

    Mikkeli, 50100

  • Research Site

    Oulu, 90220

  • Research Site

    Tampere, 33100

  • Research Site

    Turku, 20100

Other trials in Finland

Sweden5 sites
  • Research Site

    Falköping, 521 37

  • Research Site

    Lund, 222 22

  • Research Site

    Stockholm, 112 45

  • Research Site

    Stockholm, 114 33

  • Research Site

    Vällingby, 162 68

Other trials in Sweden

Norway4 sites
  • Research Site

    Ålesund, 6003

  • Research Site

    Hamar, 2317

  • Research Site

    Sandvika, 1337

  • Research Site

    Stavanger, 4005

Other trials in Norway

Canada2 sites
  • Research Site

    Montreal, Quebec, H2L 4M1

  • Research Site

    Toronto, Ontario, M4S 1Y2

Other trials in Canada

Denmark2 sites
  • Research Site

    Aarhus C, 8000

  • Research Site

    Glostrup Municipality, 2600

Other trials in Denmark

About this study

Official title: A Phase 2, Randomized, Double-blind, Placebo-controlled Study to Evaluate the Efficacy and Safety of AMG 334 in Migraine Prevention

A study to evaluate the effect of erenumab compared to placebo on the change from baseline in monthly migraine days in participants with episodic migraine.

Read the detailed description

The study is composed of an initial screening phase (up to 3 weeks), a 4-week baseline phase, a 12-week double-blind treatment phase (DBTP), an open-label treatment phase (OLTP) for up to 256 weeks, and an 8-week safety follow-up (12 weeks after the last dose of investigational product [IP]).

In the DBTP participants were to be randomized in a 3:2:2:2 ratio to placebo, erenumab 7 mg, erenumab 21 mg, or erenumab 70 mg.

During the open-label treatment phase, participants were to receive erenumab 70 mg QM from week 12 to week 264. After implementation of Protocol Amendment 3 (07 April 2016), participants remaining in the OLTP increased their dose to erenumab 140 mg QM up to week 264. The safety follow-up increased from an 8-week safety follow-up to a 12-week safety follow-up (16 weeks after the last dose of investigational product).

During the OLTP participants enrolled at sites in the United States could enroll in an optional clinical home use (CHU) substudy, per a country-specific protocol amendment dated 20 June 2016. Participants in the CHU substudy were to be randomized 1:1 into 1 of 2 treatment groups: erenumab 140 mg using a prefilled syringe or erenumab 140 mg using an autoinjector/pen. Day 1 of the CHU substudy corresponded with any OLTP study visit up through Week 256, as long as the participant had received at least 2 doses of erenumab 140 mg. During the CHU substudy, participants initially self-administered IP under site supervision on substudy day 1, and then self-administered IP at home on substudy days 29 and 57.

Conditions
Migraine
Being tested
Erenumab, Placebo, Erenumab PFS, Erenumab AI/Pen
Keywords
migraine, headache, prevention, prophylaxis
Medical subject headings
Migraine Disorders, Headache

What participants receive

What participants receive. In a randomised study each person is assigned to one group by chance.

  • ErenumabDrug

    Also called AMG 334, Aimovig™

    Administered by study site staff once a month (QM) as a subcutaneous injection

  • PlaceboDrug

    Administered by study site staff once a month (QM) as a subcutaneous injection

  • Erenumab PFSDrug

    Erenumab supplied in a single-use prefilled syringe for self-administration in the CHU substudy

  • Erenumab AI/PenDrug

    Erenumab supplied in a single-use autoinjector/pen for self-administration in the CHU substudy

Study groups in NCT01952574
Study groupRoleWhat they receive
PlaceboPlacebo comparatorParticipants received placebo on day 1 and at weeks 4 and 8 by subcutaneous injection during the double-blind treatment phase. In the open-label treatment phase participants received 70 mg erenumab QM from week 12 to week 264 (last dose). After Protocol Amendment 3, participants still on study had their dose increased to 140 mg QM.
Receives: Drug: Erenumab; Drug: Placebo
Erenumab 7 mg QMExperimentalParticipants received erenumab 7 mg on day 1 and at weeks 4 and 8 by subcutaneous injection during the double-blind treatment phase. In the open-label treatment phase participants received 70 mg erenumab QM from week 12 to week 264 (last dose). After Protocol Amendment 3, participants still on study had their dose increased to 140 mg QM.
Receives: Drug: Erenumab
Erenumab 21 mg QMExperimentalParticipants received erenumab 21 mg on day 1 and at weeks 4 and 8 by subcutaneous injection during the double-blind treatment phase. In the open-label treatment phase participants received 70 mg erenumab QM from week 12 to week 264 (last dose). After Protocol Amendment 3, participants still on study had their dose increased to 140 mg QM.
Receives: Drug: Erenumab
Erenumab 70 mg QMExperimentalParticipants received erenumab 70 mg on day 1 and at weeks 4 and 8 by subcutaneous injection during the double-blind treatment phase. In the open-label treatment phase participants received 70 mg erenumab QM from week 12 to week 264 (last dose). After Protocol Amendment 3, participants still on study had their dose increased to 140 mg QM.
Receives: Drug: Erenumab
CHU Substudy: Erenumab 140 mg PFSExperimentalParticipants in the open-label treatment phase in the United States randomized to self-administer 140 mg erenumab via two 70 mg injections using a prefilled syringe (PFS) on CHU substudy day 1 (under study site supervision), and at home on day 29 (week 4) and day 57 (week 8).
Receives: Drug: Erenumab PFS
CHU Substudy: Erenumab 140 mg AI/PenExperimentalParticipants in the open-label treatment phase in the United States randomized to self-administer 140 mg erenumab via two 70 mg injections using an autoinjector/pen (AI)/pen) on CHU substudy day 1 (under study site supervision), and at home on day 29 (week 4) and day 57 (week 8).
Receives: Drug: Erenumab AI/Pen

What is being measured

The primary outcome is the main question the study is designed to answer.

  1. Change From Baseline in Monthly Migraine Days at Week 12

    A migraine day was any calendar day in which the participant experienced a qualified migraine headache (onset, continuation, or recurrence of the migraine headache). A qualified migraine headache was defined as a migraine with or without aura. The change from baseline in monthly migraine days was calculated as the number of migraine days during the last 4 weeks of the 12-week double-blind treatment phase - the number of migraine days during the 4-week baseline phase.

    Measured: 4-week baseline phase and the last 4 weeks of the 12-week double-blind treatment phase

  2. CHU Substudy: Number of Participants Who Self-administered a Full Dose, Partial Dose, or No Dose of Erenumab

    To assess participants ability to administer a full dose of erenumab in home-use at day 29 (week 4) and day 57 (week 8), site staff called participants and asked whether the participant administered a full, partial, or no dose of erenumab. A full dose means that the entire volume of both prefilled syringes or autoinjector/pens were injected. Discontinued prior to dosing day indicates participants who had discontinued the investigational product and did not attempt to self-administer on day 29 or 57.

    Measured: CHU substudy day 29 (week 4) and day 57 (week 8)

Secondary outcomes (7)
  1. Percentage of Participants With at Least a 50% Reduction From Baseline in Monthly Migraine Days at Week 12

    A migraine day was any calendar day in which the participant experienced a qualified migraine headache (onset, continuation, or recurrence of the migraine headache). A qualified migraine headache was defined either as a migraine without aura or a migraine with aura. Monthly migraine days were calculated as the number of migraine days in the 4-week baseline phase and during the last 4 weeks of double-blind treatment. At least a 50% reduction from baseline in monthly migraine days was determined if the change in monthly migraine days from the 4-week baseline phase to the last 4 weeks of the 12-week double-blind treatment phase * 100 / baseline monthly migraine days was less than or equal to -50%.

    Measured: 4-week baseline phase and the last 4 weeks of the 12-week double-blind treatment phase

  2. Change From Baseline in Monthly Migraine Attacks at Week 12

    A migraine attack is an episode of any qualified migraine headache or migraine specific medication intakes for aura only. A migraine attack that was interrupted by sleep or that temporarily remits and then recurs within 48 hours or an attack treated successfully with medication but that relapses within 48 hours was considered to be one attack.

    The change from baseline in monthly migraine attacks was calculated as the number of migraine attacks during the last 4 weeks of the 12-week double-blind treatment phase - the number of migraine attacks during the 4-week baseline phase.

    Measured: 4-week baseline phase and the last 4 weeks of the 12-week double-blind treatment phase

  3. Number of Participants With Treatment-emergent Adverse Events in the Double-blind Treatment Phase

    An adverse event (AE) is any untoward medical occurrence in a clinical trial subject, including worsening of a pre-existing medical condition and laboratory value changes that require treatment or adjustment in current therapy.

    AEs were graded using the Common Terminology Criteria for Adverse Events (CTCAE) version 4.03:

    1. Mild; asymptomatic or mild symptoms
    2. Moderate; minimal, local or noninvasive intervention indicated; limiting daily activities
    3. Severe or medically significant but not immediately life-threatening; hospitalization indicated; disabling; limiting self-care
    4. Life-threatening consequences; urgent intervention indicated
    5. Death related to AE

    A serious adverse event is an AE that meets at least 1 of the following criteria:

    • fatal
    • life threatening
    • requires in-patient hospitalization or prolongation of existing hospitalization
    • results in persistent or significant disability/incapacity
    • congenital anomaly/birth defect
    • other medically important serious event

    Measured: From first dose of study drug in the double-blind treatment phase until the first dose of study drug in the open-label treatment phase (12 weeks) or up to 12 weeks after last dose for participants who did not enter the open-label treatment phase.

  4. Number of Participants With Treatment-emergent Adverse Events in the Open-label Treatment Phase

    An adverse event (AE) is any untoward medical occurrence in a clinical trial subject, including worsening of a pre-existing medical condition and laboratory value changes that require treatment or adjustment in current therapy.

    AEs were graded using the Common Terminology Criteria for Adverse Events (CTCAE) version 4.03:

    1. Mild; asymptomatic or mild symptoms
    2. Moderate; minimal, local or noninvasive intervention indicated; limiting daily activities
    3. Severe or medically significant but not immediately life-threatening; hospitalization indicated; disabling; limiting self-care
    4. Life-threatening consequences; urgent intervention indicated
    5. Death related to AE

    A serious adverse event is an AE that meets at least 1 of the following criteria:

    • fatal
    • life threatening
    • requires in-patient hospitalization or prolongation of existing hospitalization
    • results in persistent or significant disability/incapacity
    • congenital anomaly/birth defect
    • other medically important serious event

    Measured: From first dose in the open-label treatment phase up to 12 weeks (participants receiving 70 mg only) or 16 weeks (participants with dose increased to 140 mg) after the last dose; a maximum of 268 weeks.

  5. CHU Substudy: Number of Participants With Treatment-emergent Adverse Events During the CHU Substudy

    AEs were graded using the CTCAE version 4.03:

    1. Mild; asymptomatic or mild symptoms
    2. Moderate; minimal, local or noninvasive intervention indicated; limiting daily activities
    3. Severe or medically significant but not immediately life-threatening; hospitalization indicated; disabling; limiting self-care
    4. Life-threatening consequences; urgent intervention indicated
    5. Death related to AE

    A serious adverse event is an AE that meets at least 1 of the following criteria:

    • fatal
    • life threatening
    • requires in-patient hospitalization or prolongation of existing hospitalization
    • results in persistent or significant disability/incapacity
    • congenital anomaly/birth defect
    • other medically important serious event An adverse device effect is any AE related to the use of a medical device, including AEs resulting from insufficient or inadequate instructions for use, any malfunction of the device, or use error or from intentional misuse of the device.

    Measured: From first dose in the CHU substudy to end of substudy (up to 12 weeks)

  6. Number of Participants Who Developed Anti-erenumab Antibodies During the Double-blind Treatment Phase

    Two validated assays were used to detect the presence of anti-erenumab antibodies. First, an electrochemiluminescent bridging immunoassay was used to detect binding antibodies (screening assay) and confirm antibodies (confirmatory assay) capable of binding erenumab. Second, a cell-based bioassay was used to test positive binding antibody samples for neutralizing activity against erenumab.

    Participants who developed anti-erenumab antibodies are participants who were negative or had no result at baseline but positive at any time postbaseline during the DBTP.

    If a sample was positive for binding antibodies and demonstrated neutralizing activity at the same time point, the participant was defined as positive for neutralizing antibodies.

    Measured: 12 weeks

  7. Number of Participants Who Developed Anti-erenumab Antibodies During the Open-label Treatment Phase

    Two validated assays were used to detect the presence of anti-erenumab antibodies. First, an electrochemiluminescent bridging immunoassay was used to detect binding antibodies (screening assay) and confirm antibodies (confirmatory assay) capable of binding erenumab. Second, a cell-based bioassay was used to test positive binding antibody samples for neutralizing activity against erenumab.

    Participants who developed anti-erenumab antibodies are participants who were negative prior to the first OLTP dose but positive at any time during the OLTP, or participants with no data prior to first dose in OLTP with any post-baseline positive results.

    If a sample was positive for binding antibodies and demonstrated neutralizing activity at the same time point, the participant was defined as positive for neutralizing antibodies.

    Measured: From week 12 up to 12 weeks (participants receiving 70 mg only) or 16 weeks (participants with dose increased to 140 mg) after the last dose; maximum 268 weeks.

Timeline

From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.

  1. First posted30 Sep 2013 (estimated)
  2. Study start6 Aug 2013
  3. Primary completion25 Sep 2014
  4. Study completion12 Nov 2019

Resources

More details

For doctors and researchers: how the study is designed, who runs it, and its registry IDs.

Study design
Study type
Interventional
Phase
Phase 2
Primary purpose
Prevention
Allocation
Randomised
Intervention model
Parallel groups
Model description
In the DBTP participants were randomized to one of four arms. In the optional CHU substudy participants were randomized into one of two treatment groups.
Masking
Triple blind
Who is masked
Participant, Investigator, Outcomes assessor
Enrolment
483 participants (actual)
IDs, dates and publications
ClinicalTrials.gov ID
NCT01952574
Sponsor's protocol ID
20120178
Other IDs
2012-005331-90
Status last verified
Oct 2022
First submitted
30 Aug 2013
Last updated
12 Oct 2022
Data monitoring committee
No
Individual data sharing
Yes: De-identified individual patient data for variables necessary to address the specific research question in an approved data sharing request

Publications

  • Sun H, Dodick DW, Silberstein S, Goadsby PJ, Reuter U, Ashina M, Saper J, Cady R, Chon Y, Dietrich J, Lenz R. Safety and efficacy of AMG 334 for prevention of episodic migraine: a randomised, double-blind, placebo-controlled, phase 2 trial. Lancet Neurol. 2016 Apr;15(4):382-90. doi: 10.1016/S1474-4422(16)00019-3. Epub 2016 Feb 12.

    PubMed 26879279
  • Ashina M, Dodick D, Goadsby PJ, Reuter U, Silberstein S, Zhang F, Gage JR, Cheng S, Mikol DD, Lenz RA. Erenumab (AMG 334) in episodic migraine: Interim analysis of an ongoing open-label study. Neurology. 2017 Sep 19;89(12):1237-1243. doi: 10.1212/WNL.0000000000004391. Epub 2017 Aug 23.

    PubMed 28835404
  • Ashina M, Goadsby PJ, Reuter U, Silberstein S, Dodick D, Rippon GA, Klatt J, Xue F, Chia V, Zhang F, Cheng S, Mikol DD. Long-term safety and tolerability of erenumab: Three-plus year results from a five-year open-label extension study in episodic migraine. Cephalalgia. 2019 Oct;39(11):1455-1464. doi: 10.1177/0333102419854082. Epub 2019 May 30.

    PubMed 31146544
  • Cheng S, Picard H, Zhang F, Eisele O, Mikol DD. Efficacy and safety of erenumab for migraine prevention: an overview. Japanese Journal of Headache. 2019; 45 : 493-505.

  • Ashina M, Goadsby PJ, Reuter U, Silberstein S, Dodick DW, Xue F, Zhang F, Paiva da Silva Lima G, Cheng S, Mikol DD. Long-term efficacy and safety of erenumab in migraine prevention: Results from a 5-year, open-label treatment phase of a randomized clinical trial. Eur J Neurol. 2021 May;28(5):1716-1725. doi: 10.1111/ene.14715. Epub 2021 Jan 20.

    PubMed 33400330
  • Zhou Y, Zhang F, Starcevic Manning M, Hu Z, Hsu CP, Chen PW, Peng C, Loop B, Mytych DT, Paiva da Silva Lima G. Immunogenicity of erenumab: A pooled analysis of six placebo-controlled trials with long-term extensions. Cephalalgia. 2022 Jul;42(8):749-760. doi: 10.1177/03331024221075621. Epub 2022 Mar 10.

    PubMed 35272533
  • Ashina M, Kudrow D, Reuter U, Dolezil D, Silberstein S, Tepper SJ, Xue F, Picard H, Zhang F, Wang A, Zhou Y, Hong F, Klatt J, Mikol DD. Long-term tolerability and nonvascular safety of erenumab, a novel calcitonin gene-related peptide receptor antagonist for prevention of migraine: A pooled analysis of four placebo-controlled trials with long-term extensions. Cephalalgia. 2019 Dec;39(14):1798-1808. doi: 10.1177/0333102419888222. Epub 2019 Nov 10.

    PubMed 31707815
  • Kudrow D, Pascual J, Winner PK, Dodick DW, Tepper SJ, Reuter U, Hong F, Klatt J, Zhang F, Cheng S, Picard H, Eisele O, Wang J, Latham JN, Mikol DD. Vascular safety of erenumab for migraine prevention. Neurology. 2020 Feb 4;94(5):e497-e510. doi: 10.1212/WNL.0000000000008743. Epub 2019 Dec 18.

    PubMed 31852816
  • Sakai F, Takeshima T, Tatsuoka Y, Hirata K, Cheng S, Numachi Y, Peng C, Xue F, Mikol DD. Long-term efficacy and safety during open-label erenumab treatment in Japanese patients with episodic migraine. Headache. 2021 Apr;61(4):653-661. doi: 10.1111/head.14096. Epub 2021 Mar 25.

    PubMed 33764538
  • Ashina M, Goadsby PJ, Dodick DW, Tepper SJ, Xue F, Zhang F, Brennan F, Paiva da Silva Lima G. Assessment of Erenumab Safety and Efficacy in Patients With Migraine With and Without Aura: A Secondary Analysis of Randomized Clinical Trials. JAMA Neurol. 2022 Feb 1;79(2):159-168. doi: 10.1001/jamaneurol.2021.4678.

    PubMed 34928306

Questions about this trial

What is this clinical trial studying?

A Phase 2 study testing Erenumab, Erenumab PFS and Erenumab AI/Pen in people with Migraine, run by Amgen at 66 sites in 7 countries.

The full registered description is in the About this study section and the official record.

Who may be eligible to take part?

The sponsor lists 4 inclusion and 13 exclusion criteria. Eligibility is decided by the study team after screening, so read the full criteria and contact a listed site.

Is this clinical trial currently recruiting?

The record says: finished, as of the sponsor's last update on 12 Oct 2022. Status can change between updates, so confirm with the study contact before making plans.

Where is the study taking place?

The record lists 66 sites in United States, Germany, Finland, Sweden, Norway and 2 more countries. Whether a site is taking part right now should be confirmed with that site. See every site.

What are the possible benefits and risks?

They depend on the study and the treatment, and no study can promise a benefit. Some participants in this study may receive a placebo. The study team explains the known risks during informed consent, before anyone joins; the record itself does not list them.

What does this phase mean?

Phase 2 studies give the treatment to a larger group to see whether it has the intended effect and to keep checking safety.

Not every study follows the same path, and some studies (observational studies, device studies) have no phase.

Are results available for this study?

Yes. Results are posted in the registry (first posted 10 Jul 2018). A summary is in the For doctors view, and the full results are on ClinicalTrials.gov.

How can a doctor refer a patient or contact the research team?

The record lists no contact. The official record names the sponsor, who can be asked directly. AzTrials does not enrol participants or take referrals.

What does the primary outcome measure?

Change From Baseline in Monthly Migraine Days at Week 12 (time frame: 4-week baseline phase and the last 4 weeks of the 12-week double-blind treatment phase). The study lists 2 primary outcomes in all. It is what the study was designed to measure, not a finding.

Where can I read the original study information?

On the ClinicalTrials.gov record for NCT01952574, which also lists 10 linked publications.

Does a listing mean the treatment is approved or proven to work?

No. A listing means the study is registered. It does not show that the treatment is safe, works, or is approved by a regulator.

How often is this information updated?

AzTrials copies changed records from ClinicalTrials.gov every night and reloads the whole registry every week. The sponsor last updated this record on 12 Oct 2022.

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