Antidote | Pharmacare Academy Antidote DEFINITION It is defined as the " drug or chemical agents which is used to reverse or stop the action of poisons are known as antidote". Poisoning may occur due to the presence of lead, heavy metal, arsenic, overdose of drug,contamination of food and water etc. Antidotes are applied according to the following: local antidote: Local antidote or drug react with poison in the stomach and inactivate it's absorptions. Systematically Systematic antidote use to alter or reverse the action of absorb poison. Some common example of antidotes are: Sodium nitrite (NaNO2) Magnesium sulphate (MgSO4) Sodium thiosulphate ( Na2S2O3) & Kaolin. Classification of antidotes: Antidotes are classified on the basis of their mechanism of action , on the basis of mechanism of action they are c...