Plants are used as a source for many potent
drugs, as plants synthesize lower molecular weight organic compounds which possess
various biological activities.
A large number of medicinal plants and their
purified constituents have shown therapeutic activities, and have proved as
safe and effective therapeutic agents.
Many plant
species have been used in folklore medicine to treat various ailments. The
development of pharmaceuticals begins with identification of active principles,
detailed biological assays and dosage formulations followed by clinical studies
to establish safety, efficacy and pharmacokinetic profile of the new drug.
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