Abstract
Summary
(1) N-allylnormorphine in amounts of 10 mg/kg or more, if given within one minute after an LD 50 of Demerol, provides significant protection in mice. (2) If N-allylnormorphine is given 5 minutes after the LD 50 of Demerol, it provides little protection even if 20 mg/kg is given.
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