Antitumor activity of sodium phenylbutyrate was studied on 120 outbred female mice with transplanted Ehrlich ascites carcinoma. The animals received the drug in doses of 400, 800, and 1200 mg/kg with drinking water daily for 21 days. The antitumor effect was evaluated by tumor growth inhibition and lifespan prolongation. Phenylbutyrate in the dose of 800 mg/kg was most effective. The drug inhibited the tumor growth by 71%, prolonged the lifespan of animals by 28, and was low-toxic.
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