Medication		Typical dosage	Cost per month*	Main adverse effects
Amitriptyline†				Weight gain, dry mouth, sedation
	Generic	10 to 150 mg per day	$7
Divalproex				Liver toxicity, sedation, nausea, weight gain, tremor, teratogenicity, possible drug toxicity
	Depakote	250 to 500 mg twice per day	78
	Extended-release (Depakote ER)	500 to 1,000 mg per day	69
Propranolol				Fatigue, exercise intolerance
	Generic	80 to 240 mg per day, in three or four divided doses	9
	Sustained-release (Inderal LA)	80 to 240 mg per day	46
Timolol				Fatigue, exercise intolerance
	Generic	10 to 15 mg twice per day	23
	Blocadren	As generic	37
Topiramate				Paresthesia, fatigue, nausea
	Topamax	50 mg twice per day (titrate from 15 to 25 mg)	211
Valproic acid†				Liver toxicity, sedation, nausea, weight gain, tremor, teratogenicity, possible drug toxicity
	Generic	250 to 500 mg twice per day	30–60
	Depakene	As generic	136