title: Parkinsonian syndrome and calcium channel blockers.
abstract: (1) Parkinsonian syndromes have occasionally been attributed to diltiazem, a calcium channel blocker, sometimes with a positive rechallenge. (2) Verapamil and amlodipine have also been implicated. (3) Prescribers should be aware of the possible role of these drugs in patients presenting with a parkinsonian syndrome.
mesh_terms: D017311:Amlodipine / Q000009:adverse effects; D002121:Calcium Channel Blockers / Q000009:adverse effects*; D004110:Diltiazem / Q000009:adverse effects; D006801:Humans; D020734:Parkinsonian Disorders / Q000139:chemically induced*; D014700:Verapamil / Q000009:adverse effects
chemical_list: D002121:Calcium Channel Blockers; D017311:Amlodipine; D014700:Verapamil; D004110:Diltiazem