title: Calcium channel blockers and headache.
authors.forename: M R
authors.initials: MR
authors.lastname: Law
authors.forename: J K
authors.initials: JK
authors.lastname: Morris
authors.forename: N J
authors.initials: NJ
authors.lastname: Wald
mesh_terms: D002121:Calcium Channel Blockers / Q000627:therapeutic use*; D006261:Headache / Q000188:drug therapy*; D006801:Humans; D016032:Randomized Controlled Trials as Topic; D014665:Vasodilator Agents / Q000627:therapeutic use*
chemical_list: D002121:Calcium Channel Blockers; D014665:Vasodilator Agents