FIELD: drug preparation. SUBSTANCE: lactulose of crystalline structure contains 0.8 per cent of water. Agent 1: lactulose syrup of 65.3 per cent of initial concentration. Condition for the reaction: boiling at decreased pressure less than 0.2 bar, temperature below 60 C down to concentration of about 85 per cent by weight followed by seeding crystalline lactulose and boiling down in progress at 65 to 75 C. EFFECT: high quality of drug preparation. 4 cl
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