Repeated administration of suxamethonium in a patient with atypical plasma cholinesterase.

The response to a range of small doses of suxamethonium was evaluated in a patient with an atypical plasma cholinesterase who required a course of electroconvulsive therapy. A dose of 0.05-0.1 mg/kg of suxamethonium is suggested as a suitable test dose in patients suspected of having an atypical plasma cholinesterase.