Extrapyramidal symptoms
Akathisia,Dystonia,Muscle stiffness,Neuroleptic malignant syndrome (NMS; infrequent but serious),Parkinsonism,Tardive dyskinesia
Common
Anticholinergic effects,Sedation,Weight gain,Erectile dysfunction,Oligomenorrhea or amenorrhea
Less common
Orthostatic hypotension (after IM injection), tachycardia
Agitation, anxiety, cerebral edema, depression, dizziness, euphoria, headache, insomnia, poikilothermia, restlessness, weakness, confusion
Anorexia, constipation, dyspepsia, ileus, decreased gag reflex
Lens opacities (prolonged use)
Uncommon
ECG changes,Photosensitivity,Pruritus,Diarrhea,Blood dyscrasia,Ejaculatory disorder,Galactorrhea
Rare
Seizure,Cholestatic jaundice,Priapism
Potentially Fatal: Neuroleptic malignant syndrome