Researchers from the Department of Pharmacology and Pharmacy of the LKS Faculty of Medicine at The University of Hong Kong found intramuscular olanzapine to be a cost-effective drug for treating acute agitation in Accident and Emergency departments in Hong Kong. Compared to haloperidol, olanzapine is similarly cost-effective and has a more benign cardiovascular profile, with fewer movement disorder side effects. The research team conducted a cost-effectiveness analysis comparing olanzapine, midazolam, and haloperidol for emergency use.