Long-acting opioids and headache: a response.
Department of Neurology, Dartmouth Hitchcock Medical Center, Lebanon, NH, USA.
Morris
M
Levin
D000701:Analgesics, Opioid / Q000627:therapeutic use*; D000818:Animals; D006261:Headache / Q000188:drug therapy*; D006801:Humans
D000701:Analgesics, Opioid