Letter: Treatment of migraine with piracetam and clonidine.
D003000:Clonidine / Q000627:therapeutic use*; D004359:Drug Therapy, Combination; D006801:Humans; D008297:Male; D008881:Migraine Disorders / Q000188:drug therapy*; D010889:Piracetam / Q000627:therapeutic use*; D011760:Pyrrolidinones / Q000627:therapeutic use*
D011760:Pyrrolidinones; D003000:Clonidine; D010889:Piracetam