Propranolol and related '-olol' drugs: usage "olol" is just two backwards lower case b's. Backward b's stand for "beta blocker". • Beta blockers include acebutolol, betaxolol, bisoprolol, oxprenolol, propranolol. Succinylcholine: action, use Succinylcholine gets Stuck to Ach receptor, then Sucks ions in through open pore. You ^*&^* stuff in through a mouth-tube, and drug is used for intubation.