Which of the following drugs is hydrolyzed by a plasma esterase that is abnormally low in activity in about 1 in every 2500 humans?
* SCh is the shoest acting muscle relaxant due to its metabolism by pseudocholinesterase. * Some patients contain an atypical pseudocholinesterase (which has abnormally low activity) and are susceptible to develop apnea with the use of this drug.
Ethanol
Rifampicin
Cimetidine
Succinylcholine
Anaesthesia