Canvert-M (manufactured by Alasht Pharmed Co. Iran) is a topical roll-on formulation that contains cannabidiol, peppermint, lavender, rosemary, eucalyptus, wintergreen, basil oil, etc. This phase IV, single-arm, open-label clinical trial evaluated the efficacy and safety of Canvert-M in males and females aged 18 to 55 years diagnosed with migraine according to the International Classification of Headache Disorders, 3rd edition (ICHD-3), for the treatment of migraine attacks.

The primary objective was to assess the reduction in headache intensity using a 4-point scale (0=no headache, 1=mild headache, 2=moderate headache, 3=severe headache).

Secondary objectives included evaluating additional efficacy and safety outcomes of Canvert-M in managing migraine attacks.

In this study, participants are asked to:

• Apply an adequate amount of Canvert-M roll-on to the areas of the forehead, temporal, behind the ears, and base of the neck, at the onset of a migraine attack. (If the participant's headache persists after 30 minutes, a second dose can be used.)
• Record the date when the headache occurred.
• Record the severity of the headache at various time points (before using Canvert-M, and then at 30 minutes, 60 minutes, 120 minutes, 4 hours, and 24 hours after using the Canvert-M roll-on) based on the 4-point scale.
• As much as possible, avoid using any other analgesics for two hours after applying Canvert-M. However, if the headache persists after two hours, the participant may use another medication and should record the name(s) of the drug(s) taken.
• Record a general evaluation of the effectiveness of the investigational product using a simple Likert-type verbal scale.

Inclusion criteria:

1. Males and females with age of 18 to 55 years
2. Age of migraine onset ˂ 50 years
3. Having a diagnosis of migraine according to the International Classification of Headache Disorders 3rd edition (ICHD-3) for at least one year
4. Having a history of 2-8 attacks per month
5. Remaining stable on prophylactic medication (if used) during the 2 months prior to screening and throughout the study period
6. Using effective contraception by the women of childbearing potential during the study
7. Ability to provide written, informed consent and to be compliant with the schedule of protocol assessments

Exclusion criteria:

1. Having a diagnosis of other primary (cluster and tension) and secondary headache disorders
2. Having a history of chronic migraine headache
3. History of resistant or refractory migraine headaches based on European Headache Federation consensus
4. Receiving any abortive medication for the treatment of migraine within 48 hours before using Canvert-M
5. History of psychiatric and neurologic disorders (except migraine) or any medical comorbid conditions that interfere with the study results
6. History of nasal sensitivity or allergy to menthol, lavender, rosemary, eucalyptus, wintergreen and basil oil
7. The presence of any skin lesions in the areas where the product is used
8. Treatment with any investigational agent within 30 days prior to screening
9. History of substance use disorders
10. Nursing mothers, pregnant women, and women who plan to become pregnant during the study period
11. Taking carbamazepine, cilostazol, citalopram, clarithromycin, clobazam, colchicine, cyclosporine, digoxin, itraconazole, phenobarbital, phenytoin, rifampin, sirolimus, tacrolimus, tizanidine, and warfarin within 14 days of the study procedure

Data produced in the present study are available upon reasonable request from the investigators.