<prompt> Muscle relaxant excreted exclusively by kidney is:ScolineAtracuriumVecuroniumGallamine  <response>: Ans. is d i.e. Gallamine Urinary Excretion of Gallamine is95. Its biliary excretion is 1 .-Lee, 12eGallamineIt is nephrotoxic so CI in Renal Failure .It crosses placenta so CI in Pregnancy .Some important facts about Muscle Relaxants which are frequently asked:M.R. undergone Hoffmans elimination - AtracuriumM.R. of choice in Ranal failure Hepatic failure - AtracuriumM.R. causing maximum Histamine release - d-TCM.R. causing minimum Histamine release - VecuroniumM.R. CI in Hepatic failure - d-TCPancuroniumScolineM.R. used in Bronchial Asthma - Atracurium Vecuronium 