External, in the form of a solution of 35 PE / ml, depending on the thickness of the scab. The contents of the vial are diluted in 10 ml of 0.5% novocaine solution or 0.9% % solution of sodium chloride. The solution is prepared immediately before use. A tissue moistened with a drug is applied to the burn surface, covered with a waterproof bandage, which is changed once a day or every other day, removing the exfoliated necrotic tissue. At the same time, no more than 30% of the total body surface is treated. The course of treatment is from 4 to 12 days.