Clinical Pharmacology and Toxicology

Bio-availability is defined as the measurement of the rate and amount of the therapeutically active substance or drug or medicine that reaches the systemic circulation and that is available in the particular site of infection, the disease in our body. It can be simply defined as the degree of absorption of the drug by our body. Bioavailability completely depends on the route of administration and formulation of the drug. There are two types of bio-availability, absolute bioavailability, and relative bioavailability. We can get 100% bioavailability through intravenous administration.

• Absolute bioavailability Relative bioavailability