Pharmacokinetics

Pharmacokinetics:

Absorption and transport of drugs—

o  Biological membranes are lipid bi-layer structure.

o  The ability of a drug to diffuse across the cell membrane depends upon the lipid : H₂O proportion co-efficient.

o  There are pores or channels in the membranes which impose less restriction and permits low molecular weight drugs to pass through.

General Pharmacology Basics

Drugs—these are chemical substances used or intended to be used to modify or explore the physiological condition or pathological state for the benefit of the recipient. Drugs may be used for prevention, diagnosis and treatment.

Prevention—BCG vaccine, Anti-malarial drugs for malarial prophylaxis.

Diagnosis—Barium meal for Peptic ulcer diagnosis.

Treatment—Anti-biotic, Anti-TB drugs.

Medicine—these are chemical substances or mixtures of one or more substances used in suitable convenient form for treatment of diseases.