Anti-histamines suppress the histamine-induced wheal response (swelling) and flare response (vasodilation) by blocking the binding of histamine to its receptors or reducing histamine receptor activity on nerves, vascular smooth muscle, glandular cells, endothelium, and mast cells.

Anti-allergic agents helps the prevention of activation and release of mediators of inflammation.

Anti-hypertensives are agents that are used to treat hypertension (high blood pressure).

A vitamin is a micronutrient that is used in coenzymes in organisms such as humans.

Anesthetics is a drug used to induce anesthesia. It results in a temporary loss of sensation or awareness. This may be divided into two broad classes: general anesthetics, which result in a reversible loss of consciousness, and local anesthetics, which cause a reversible loss of sensation for a limited region of the body without necessarily affecting consciousness.

Agents that increase uric acid excretion by the kidney (uricosuric agents), decrease uric acid production (antihyperuricemics), or alleviate the pain and inflammation of acute attacks of gout.