Symptoms: Headache, nausea, vomiting, epigastric pain, gastrointestinal bleeding, rarely diarrhea, disorientation, agitation, coma, drowsiness, dizziness, tinnitus, fainting, and occasionally seizures. In severe cases of poisoning, acute renal failure and liver failure may occur.
Management: Symptomatic treatment and supportive care. Within one hour of ingestion of a potentially toxic amount, gastric lavage, and activated charcoal should be administered. Ensure good urinary output, closely monitor liver and kidney function and observe the patient for at least 4 hours. If seizures occur, intravenous diazepam may be administered. Diuresis, dialysis, or hemofiltration are not effective in removing the drug from the body.