Butorphanol (Stadol) :A Study in Problems of Current Drug Information and Control
Neurol 48:1156-1160, Fisher,M.A.&Glass,S., 1997
Drugs for Migraine
The Medical Letter 37:17-20, , 1995
Migraine:A Pharmacologic Review with Newer Options and Delivery Modalities
Neurol 44:S13-S17, Baumel,B., 1994
Chronic headache:Appropriate Use of Opiate Analgesics
Neurol 44:S18-S24, Markley,H.G., 1994