title: Tachyphylaxis in migraine prophylaxis.
authors.forename: S
authors.initials: S
authors.lastname: Ali
authors.forename: N T
authors.initials: NT
authors.lastname: Mathew
mesh_terms: D006801:Humans; D008784:Methysergide / Q000627:therapeutic use; D008881:Migraine Disorders / Q000517:prevention & control*; D009248:Nadolol / Q000627:therapeutic use; D012189:Retrospective Studies; D013618:Tachyphylaxis
chemical_list: D009248:Nadolol; D008784:Methysergide