If I am quite honest I am most surprised, nay, shocked, and appalled that it is still in use. All the APs are somewhat iffy, but haldol is specifically toxic in a malignant kind of way, not merely nasty but actual poison IMO. It has a toxic metabolite, HPP that gets metabolised by MAO-b (sorry but the MAOI you take is specific to the type A isoform) to a charged metabolite, HPP+ once uptaken by DAT into dopaminergic neurones, and thence goes about killing them. Can't leave the cell because its charged, so it gets stuck there frying the neurones. Nasty shit. Loperamide, the antidiarrhea drug does something similar, only the nasty metabolite, LPP/LPP+ is restricted to the periphery because p-glycoprotein, a multi-drug efflux pump localized to the blood-brain barrier craps it out again as fast as it can enter. In infants or baby swine whos BBB has not developed yet, loperamide is pretty toxic.