Q.2 Define Drug. What are its types?

Q.2 Define Drug. What are its types?
Answer:
Definition
Any substance that is absorbed into the body of a living organism, alters normal body function is known as a drug.
Types
Drugs are broadly classified into two types
i. Pharmaceutical drug
OR
Medicinal drug
It is defined as any chemical substance used in the diagnosis, cure, treatment or prevention of diseases.
ii. Addictive drugs
Some drugs often make person dependent on them, or addicted. These may be called as addictive drugs.