Approach to the evaluation and management of suspected drug-induced parkinsonism

DaTscan: striatal dopamine transporter imaging using 123I-FP-CIT single-photon emission tomography; PD: Parkinson disease.
* Common causes of drug-induced parkinsonism:

• Antipsychotic drugs
• Antiemetic/promotility agents (eg, metoclopramide)
• Dopamine-depleting agents (eg, reserpine)
• Cinnarizine/flunarizine
• Valproic acid

Refer to UpToDate topics on drug-induced parkinsonism for other less common causes.