Some drugs used to treat nausea and vomiting can also cause NMS, because they block dopamine. These include:
People who take drugs for Parkinson's disease, like levodopa, can get NMS if they stop taking their medicine too quickly.
Domperidone (Motilium)
Droperidol (Inapsine)
Metoclopramide (Reglan)
Prochlorperazine (Compazine)
Promethazine (Phenergan)