In India insecticidal poisoning containing organophosphorous is most commonly seen. Poisoning due to plant yield booster containing nitrobenzene is also on the rise. A 35 year old male patient was admitted with ingestion of plant yield booster (Boom Flower) showed the symptoms and signs of nitrobenzene poisoning with methaemoglobinemia. Timely use of mechanical ventilation and repeated parenteral methylene blue help to save a life.