Adulteration* Adulteration is defined as a practice of substituting the original drug,partially or wholly with similar looking inferior substances which may have low therapeutic and chemical properties. different types of adulterations are- a)Substitution with substandard commercial varieties b)Substitution with superficially similar inferior drugs. c)Substitution with artificially manufactured substances d)Substitution of exhausted drugs e)Substitution with synthetic materials f)Harmful adulterants And many more... References- *C.K. Kokate, A.P. Purohit, S.B. Gokhale; Pharmacognosy; Nirali Prakashan; Fourth edition ;Page no-(105-107)