Effect of Local Anaesthetics on Barbiturate Sleeping Time

Abstract
The effect of certain local anaesthetics on barbiturate sleep in the mouse and the guinea pig is described. One of a series of new local anaesthetics 1-(1-methyl-2-phenylcarbamoylethyl)pyrrolidine (WS 10) prolongs barbiturate sleep in the guinea pig 2.3 times at the optimal dose without obvious side effects; other closely related members of the same series diminish barbiturate sleep.