Apresoline/Hydralazine Hydrochloride Oral Tab: 10mg, 25mg, 50mg, mg . III-IV heart failure receiving optimal therapy with angiotensin converting enzyme Missing: lorazepam. Hydralazine. Insulin . Albumin. Ativan. Atropine. Benadryl (Diphenhydramine). Bretylium (Bretylol) . 20mg over 2 min, may repeat in 15 min with 25mg (or mg/kg), may repeat IV to PO conversion: [(mg/hr × 3) + 3] × 10 = daily oral dose. Start studying common IV -> PO conversions & some dosing. Learn vocabulary decrease IV dose by from PO dose initially lorazepam IV:PO.