<prompt> A person was given a muscle relaxant that competively blocks nicotinic receptors which of the following drug is used for reversal of muscle relaxation after surgery ?PHYSOSTIGMINENEOSTIGMINECARBACHOLSUCCINYL CHOLINE  <response>: Competitive blocker of nicotine receptor --- d Tubocuropive Neostigmine is ACh esterase inhibitor it increases ACh at the synapse and competitive inhibition can be overcome. ref : KD TRIPATHI 8TH ED 