In the event of overdosage, dactinomycin therapy should be withdrawn immediately. Limited information is available on overdosage in humans. Manifestations of overdose have included nausea, vomiting, diarrhoea, mucositis including stomatitis, gastrointestinal ulceration, severe skin disorders including skin exfoliation, exanthema, desquamation and epidermolysis, severe haemopoietic depression, veno-occlusive disease, acute renal failure, sepsis (including neutropenic sepsis) with fatal outcome and death. Treatment should be symptomatic and supportive. There is no known antidote. It is advisable to check skin and mucous membrane integrity as well as renal, hepatic and bone-marrow functions frequently.
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