Source of drug

""  Source of drug ""

(1)  Natural source:-

                 i.  Plant –

Ø  Digitalis

Ø  Morphine

Ø  Atropine

Ø  Reserpine

                 ii.  Animal –

Ø  Insulin

Ø  Heparin

Ø  Gonadotropin

                 iii. Microorganism –

Ø  Penicillin

Ø  Chloramphenicol

Ø  Bacitracin

Ø  Tetracycline

                 iv. Minerals –

Ø  MgSO₄. 7H₂O

Ø  Ferrous sulphate

Ø  Liquid paraffin

(2) Synthetic source:-

Ø  Aspirin

Ø  Anti-malarial drugs

Ø  Sulphonamides

Ø  Paracetamol

(3) Semi-synthetic source:-

Ø  Ampicillin

Ø  Tetracycline

(4)  Recombinant DNA technology:-

Ø  Human insulin.

Definition of Drug

 

 

Definition of Drug: A drug is a chemical that has medicinal, performance-enhancing or intoxicating effects when introduced into the body of a human or other animal. Substances which are foods are not considered to be drugs, although active ingredients from foods make are purified for use as drugs. Also, some chemicals used as drugs are identical to substances made in the body (e.g., insulin, testosterone). The chemical is considered a drug only if it is introduced into the body from the outside, such as by ingestion, injection or topical application.

Definition of Drug

Definition of Drug: Any substance or product that is used or intended to be used to modify or explore physiological or pathological states for the benefit of the recipient is called drug.

Example : morphine, atropine, insulin, aspirin etc.

Definition of Pharmacology

Definition of Pharmacology: Pharmacology embraces the knowledge of history, source, physical and chemical properties, compounding, biological and physiological effects, mechanism of action, absorption, distribution, biotransformation, excretion therapeutic and other uses of drugs.