Efficacy and Safety of Cyclobenzaprine Hydrochloride Extended Release for the Treatment of Chronic Migraine

Study Overview
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Brief Summary
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The primary objective of the study is to evaluate the effectiveness and safety of cyclobenzaprine hydrochloride extended release (Amrix 15mg/day) for the prophylaxis of chronic migraine compared to a placebo medication. A second objective, is to find out whether there is an improvement in quality of sleep and self-reported depression in patients taking Amrix 15mg daily. The hypothesis is that the number of migraine days per month of patients treated with Amrix 15mg daily will be significantly lower than those patients treated with placebo.

Official Title
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Efficacy and Safety of Cyclobenzaprine Hydrochloride Extended Release for the Treatment of Chronic Migraine: A Randomized, Double-Blind, Placebo-Controlled Trial

Conditions
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Chronic Migraine

Intervention / Treatment
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* Drug: cyclobenzaprine hydrochloride
* Drug: placebo


Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: males and females, aged 18 to 65, with headaches longer than 30 minutes per day for at least 15 days per month (28 days) meeting ICHD-IIR criteria for chronic migraine. Subjects must have headaches at least 8 days per month which are alleviated with triptans or ergots AND/OR which have at least 1 migrainous feature (unilaterality of headache or pain more prominent on 1 side of the head, throbbing, nausea, vomiting, photophobia, phonophobia, increased pain with physical exertion or avoidance of exertion) subjects willing and able to perform all study-related measures including accurately completing study diaries and instruments, maintaining stable doses of headache preventative medications, completing study visits and obtaining blood testing as indicated. women of childbearing potential must use an acceptable method of birth control for the duration of the study (oral contraceptives, IUD, injectable or intravaginal contraception or barrier methods combined with spermicide) Exclusion Criteria: subjects <18 and >65 years of age pregnancy or attempted pregnancy during the study nursing females psychiatric condition which, in the investigator's opinion will influence trial safety or data collection new daily persistent headache, hemicrania continua, chronic tension-type headache or cluster headache diagnoses. headache suspicious for and not investigated to rule out secondary headache disorder angle closure glaucoma urinary retention hepatic impairment felt by the investigator to interfere with study safety (as determined from history and/or prerequisite liver function testing within 1 year of study enrollment) within 14 days of MAO inhibitor use or discontinuation known hypersensitivity to cyclobenzaprine hydrochloride or any component of Amrix formulation concomitant tramadol or tricyclic antidepressant use history of myocardial infarction or congestive heart failure hyperthyroidism new start of daily preventative medication (which may influence headaches) less than 2 months preceding enrollment dosage change or discontinuation of daily preventative medication (which may influence headaches) within 1 month of trial enrollment -

Ages Eligible for Study
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Minimum Age: 18 Years
Maximum Age: 65 Years

Sexes Eligible for Study
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All

Accepts Healthy Volunteers
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No

Study Plan
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How is the study designed?
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Design Details

Primary Purpose: Prevention
Allocation: Randomized
Intervention Model: Parallel Assignment
Masking: Triple


Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| Active Comparator: cyclobenzaprine hydrochloride<br> | Drug: cyclobenzaprine hydrochloride<br>* 15mg daily for 3 months<br>* Other names: cyclobenzaprine hydrochloride is Amrix 15mg/daily;|
| Placebo Comparator: placebo<br> | Drug: placebo<br>* placebo<br>|

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Mean total number of migraine/migrainous headache days per month | The principle outcome variable will be the mean total number of migraine/migrainous headache days which will be calculated for the month prior to enrollment in the study (pretreatment) and then calculated for the third month after study treatment (posttest) after taking 15mg of Amrix or the placebo. | 4 months | 

Secondary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Mean total number of headache days/month |  | 4 months | 
| mean peak daily and mean average daily pain intensity ratings/month |  | 4 months | 
| mean total number of abortive treatment days/month |  | 4 months | 

 Terms related to the study
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Keywords Provided by Centre Hospitalier Valida
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migraine