This is a good controversial review in favor or against Intravenous haloperidol. It is important to know that IV haloperidol is not FDA approved. QT Prolongation, Torsades de pointes, and alternative agents for sedation always should be considered.
Intravenous Haloperidol Has a Limited Role in the Modern Emergency Department
Haloperidol May Be Safely Administered Intravenously in the Emergency Department