title: Antagonism to calcium antagonists.
authors.forename: B M
authors.initials: BM
authors.lastname: Psaty
authors.forename: M A
authors.initials: MA
authors.lastname: Sevick
mesh_terms: D002121:Calcium Channel Blockers / Q000009:adverse effects*; D006471:Gastrointestinal Hemorrhage / Q000139:chemically induced* / Q000191:economics; D006801:Humans
chemical_list: D002121:Calcium Channel Blockers