Hi, Trazodone undergoes breakdown and metabolism in the liver. The metabolites, at least one of which is pharmacologically active, are excreted by the kidney. However, elderly patients are more likely to have hyponatremia (low sodium in the blood), which may require caution in patients receiving trazodone. Therapy with trazodone should be administered cautiously in patients with significantly impaired renal or liver function. Since you have written about over dose, it is important to study blood tests involving liver and kidney functions. Sudden death may not happen with an occasional overdose but long term effects of several incidents involving overdose can be harmful.