Actinomycin 0.5 mg injection specifically is an actinomycin prescribed for treating a wide range of cancers. This drug is an intravenously administered, antineoplastic antibiotic. The actinomycin 0.5 mg is used to treat cancer like Wilms' tumor, childhood rhabdomyosarcoma, Ewing's sarcoma, and metastatic, nonseminomatous testicular cancer as part of combination chemo or multi-modality treatment regimen. Actinomycin 0.5 mg comes as a powder to be mixed with liquid to be injected into a vein by a health specialist in a medical facility. The time period of therapy depends on the nature of cancer you have, the sorts of other drugs you are taking, and how well your disease responds to treatment.