Influence of tetrahydro-aminacrine on muscle pains after suxamethonium

The incidence and severity of muscle pains were investigated in patients who had been given suxamethonium and thiopentone anesthesia for bronchoscopy. Group I patients received no other drugs. Groups II and III received d-tubocurarine and THA respectively before suxamethonium. Administration of these drugs resulted in a highly significant reduction in the incidence of severe and moderate pains. The use of d-tubocurarine necessitated a significantly greater amount of suxamethonium to maintain paralysis.