How long do the effects of alcohol poisoning last?

Depends on levels: A naive individual who drinks as little as a pint of 80 proof liquor (chugging, as in fraternity/sorority hazings) may die with an alcohol level of 250 mg%. More tolerant individuals may need alcohol levels two to three times that level to experience poisoning. Alcohol is metabolized at 10-15 mg%/hour, so about a day would be required to fully metabolize a level of 300 mg%.