The most convenient way to assess the quality of a drug substance is to determine the melting rate of the drug. The solubility of a solid drug is defined as the percentage of the drug that passes into the solution over a period of time. It is convenient to evaluate the solubility of drugs to compare different forms of the drug and to control the quality during the production process. Many methods and devices have been developed to determine the rate of melting.

Relatively little, and in most cases, pharmacological and technological parameters

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