Pharmacodynamic

Drugs do not typically create new biological functions; instead, they modify existing biochemical processes. Most drugs achieve this by binding to specific target structures, primarily —specialized proteins on cell surfaces or within cells.

Beyond receptors, drugs may also target enzymes (such as NSAIDs inhibiting cyclooxygenase), transporters, or ion channels directly. Agonists, Antagonists, and Affinity pharmacodynamic

: Often involved in cell growth and metabolism. Drugs do not typically create new biological functions;