Psychoses: 0.5-5 mg 2-3 times/day, up to 100 mg/day in severe cases. Maintenance: 3-10 mg/day.
Severe tics; Tourette's syndrome. Initial: 0.5-1.5 mg 3 times/day, up to 10 mg/day in Tourette's syndrome.
Adjunct in severe anxiety or behavioral disturbances: 0.5 mg twice daily.
Restlessness and confusion: 1-3 mg 8 hrly.
Intractable hiccup: 1.5 mg 3 times/day.
Acute psychosis: 2-10 mg hrly or 4-8 hrly until symptoms are controlled. Max: 18 mg/day.
Nausea and vomiting: 0.5-2 mg/day.
Restlessness and confusion: 5-15 mg over 24 hr.
Adverse drug reactions
: tardive dyskinesia, extrapyramidal reactions, anxiety, drowsiness, depression, anorexia, transient tachycardia, postural hypotension, leukopenia; anticholinergic side effects.
Adapted from CIMS Drug Information System. Internet. Accessed on January 10, 2016.