<p>Cases of deliberate overdose are unknown but excessive toxicity because of the hematological effects as described above. There is no specific antidote to 5-fluorouracil toxicity; treatment consists in supportive care. In addition to the hematological toxicity other toxicities will occur with overdose. Sign and symptoms are qualitatively similar to the side effects. Treatment should be performed promptly and appropriate drugs are given to control symptoms of overdose.</p>