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“…And then a throb hits you on the left side of the head so hard that your head bobs to the right…There's no way that came from inside your head, you think. That's no metaphysical crisis. God just punched you in the face.” --Andrew Levy, A Brain Wider Than the Sky: A Migraine Diary
Migraine Prevention LT Sara Pope, MD 7 February 2013
Objectives • Briefly reviewed treatment of migraines • Explored the importance of prophylaxis • Assessed when to start prophylaxis • Discussed treatment types
Migraines: In Brief • Common, complex and recurrent • >30 million people have 1+ migraines/year • 13% prevalence, 75% female • 80% have a 1st degree relative with a history • Environmental, behavioral triggers
Migraines: Sensitive CNS? • Intracranial vasoconstriction + rebound dilation • Neurogenic process w/2°changes in cerebral perfusion • Classic: +AURA, gradual, unilateral, pulsating, +sensory • Common: NO AURA, episodic vs. chronic
True Migraine? • Head pain + nausea + sensory sx • >4 h, <72h • Starts young, rare >50 yo • Common in reproductive years • Predictable triggers • Red flags
Why Prophylaxis? • Reduce frequency, severity and duration • Improve responsiveness to acute tx • Improve function, reduce disability, +QOL • Reduce costs • Only 13% on preventive therapy
When to Start? • Recurrent, interfere w/ADL’s despite tx • >4 attacks/month • Contraindications or failure/overuse of acute tx • Adverse events to acute tx • Hemiplegic, basilar, prolonged aura, infarction • Menstrual: mini-prophylaxis
How? • Several medications • Varied mechanisms of action • No ‘gold standard’, pt specific • Success: reduction in migraine frequency by 50% in first 3 months
Small Groups • Three Groups • Three Medication Categories • Three Teaching Points • Three Cases
Anti-Hypertensives • Propanolol, metoprolol,timolol: Effective • Verapamil, nimodipine: Insufficient • Lisinopril, candesarta: Possibly effective • Telmisartan: Possibly not effective
Anti-Convulsants • Topiramate: Effective, as good as BB, VA, TCA • Divalproex, valproate: Effective • Gabapentin: Insufficient • Lamotrigine, oxcarbazepine: Ineffective
Anti-Depressants • Fluoxetine: Limited, conflicting data • Venlafaxine: Probably Effective • Amitriptyline: Probably Effective, as good as topiramate, maybe Venlafaxine
Others… • Triptans • Botox • Butterbur • Co-enzyme q10 • Feverfew • Magnesium • Methylsergide • Riboflavin • Acupuncture • Relaxation, biofeedback • CBT • Hypnosis • TENs • Hyperbaric oxygen
Principles of Prophylaxis • Start low, go slow • Adequate trial in duration, dosage • Avoid overuse: analgesics, opioids, triptans • Caution: women of child bearing age • Address expectations, preferences, side effects, commitment • Slowly taper w/improvement, recommend 6-9 months
Objectives • Briefly reviewed treatment of migraines • Explored the importance of prophylaxis • Assessed when to start prophylaxis • Discussed treatment types