Acquired methemoglobinemia is a dyshaemoglobinemia which results from exposure to various oxidizing agents, results in impaired oxygen delivery to the tissues and can be potentially fatal if untreated. Deliberate ingestion of certain herbicides, insecticides, and pesticides may produce this condition. We report 2 cases of methemoglobinemia due to intentional ingestion of pesticides which were marketed to be safe and contain only biological extracts and fillers. Methylene blue, ascorbic acid, blood transfusion and exchange transfusion are the various modalities of treatment.