Acetaminophen - N Acetyl Cysteine, Benzodiazepine - Flumazenil and organophosphate - Atropine, Pralidoxime.
Acetaminophen - Gastric cleansing before 2 hours, activated carbon before 6 hours and 18 doses of N-AcetylCysteine after 6 hours of overdose. Benzodiazepines - Flumazenil until effects disappear. Organophosphate - Atropine