Risdon Risperidone Tetrabenazine
MajorAdditive QT prolongation and extrapyramidal effects, with risk of neuroleptic malignant syndrome.
These medicines can affect each other in a serious way. Do not start taking them together unless your doctor has said it is OK. If you already take both, do not stop either one on your own: speak to your doctor or pharmacist soon.
Clinical management: Monitor ECG and for movement disorder symptoms; use lowest doses.