Analgesic Headache
BMJ 310:479-480, Olesen,J., 1995
Is There a Problem with Long Term Use of Sumatriptan in Acute Migraine?
BMJ 308:113, Osborne,M.J.,et al, 1994
Chronic headache:Appropriate Use of Opiate Analgesics
Neurol 44:S18-S24, Markley,H.G., 1994
Use of Benzodiazepines in Anxiety Disorders
NEJM 328:1398-1405, Shader,R.I.&Greenblatt,D.J., 1993