<prompt> Action of which of the following drug is rapidly terminated:SuccinylcholineAtracuriumPancuroniumD-tubocurarine  <response>: Ans: a Succinylcholine Ref: KDT, 6 344, Ajay Yadav, 2 ed, p. 86Succinylcholine is the shortest acting skeletal muscle relaxant.Succinylcholine3-6 minAtracurium20-35 minPancuronium40-80 minD-tubocurarine30-60 minMetabolism of succinylcholine:Metabolised in plasma by psendocholinesterase whieh is synthesised by liverShould be given at a faster rate.Rapid, complete, predictable paralysis with spontaneous recovery in 5 min.Friends, study this well. The following list may look exhaustive, but is extremely worthwhileFrequently asked questions regarding SMR:Shortest acting non-depolarizing SMR- mi vacurium 10- 20 minShortest acting depolarizing SMR- succinylcholine 3-6 minOverall shortest acting SMR- succinylcholineLongest acting SMR- pipecuroniumMost potent nondepolarizing SMR- doxacuriumLeast potent nondepolarizing SMR- gallamineSMR to undergo Hoffmans elimination- atracuriumSMR safe in renal failure hepatic failure- atracuriumSMR CI in pregnancy renal failure- gallamineSMR with maximum histamine release- D-tubocurarineSMR with minimum histamine release- vecuroniumSMR used in bronchial asthma- atracurium. vecuroniumSMR CI in hepatic failure- d-Tc, succinylcholine, pancuroniumSMR used to reduce BP- d-TcSMR used to maintain BP- pancuronium 