An herb is a substance of plant origin that, according to one’s desires, can be used for culinary or medicinal purposes. A typical herb may contain dozens of different compounds, so it has rarely been advantageous to separate an herb into its constituents.
An herbal preparation possesses the properties of a drug, albeit a mild one in many cases, should be treated as such. It is pharmacologically active and interacts with prescription drugs. Pharmacist should be cognizant of the truth that herbs are real drugs and that their patients may be self-medicating with them. This practice may be affect the outcomes of therapy with prescription drugs.