Frovatriptan as a Transitional Therapy in Medication Overuse Headache

Inclusion Criteria: * MOH diagnosed by IHS criteria * Diagnosis of migraine (with or without aura) in past by IHS criteria * If patients do not have a baseline diary, then a prospective diary for a 10-day period will be done to confirm medication overuse before study entry. * Patients aged 18 to 65 years. * Normal neurological examination. * Patient is willing and able (in terms of capacity) to sign informed consent. * Patient is able to understand and complete study protocol, including completion of headache diaries. * Patient has a stable medical condition. Exclusion Criteria: * Headache not meeting IHS criteria for MOH. * Presence of hemiplegic, basilar, ophthalmoplegic migraine or migrainous infarction. * Findings on history, neurological exam, or neuroimaging suggestive of secondary causes of headache. * Post-whiplash or post-traumatic headaches. * Contraindications to triptans (such as heart disease, peripheral vascular disease or uncontrolled hypertension) or previous serious side effects/intolerance. * Major psychiatric conditions (such as major depression, bipolar disorder, schizophrenia, addiction), either diagnosed by a physician or positive on standard clinic assessment tools (e.g. BDI questionnaire). * Major medical conditions or treatments that may interfere with the patient's ability to participate in the study, such as dementia, advanced or terminal cancer, chemotherapy, etc. * Patient is pregnant, breastfeeding, or is expecting to conceive within the time …