Evaluation of a drug ensures the identity of a drug and determines the quality and purity of drugs. The main reasons behind the need for evaluation of drugs are biochemical variation in the drug, effect of treatment and storage of drugs, and the adulterations and substitutions. Microscopic evaluation of drugs allows more detailed examination of a drug and it can be used to identify the organised drugs by their known histological characters. It is typically used for qualitative evaluation of organised crude drugs in entire and powdered forms. It is necessary for the detection of adulterants and contaminants of the herbal preparations and thus provides means for assessing the authenticity and quality of herbal drugs. The evaluation is done by studying its various properties like organoleptic, microscopic, physical, chemical and biological evaluation. In this regards microscopic evaluation is of importance as it is the most reliable and suitable technique to check the quality of the drug. The presentation will help you to understand the topic in detail.

Neethu K Prasanth

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