indication

An indication is simply the answer to 'what is this drug for?' If a drug is a tool, the indication is the specific job it is officially meant to do, such as lowering blood pressure or treating a particular cancer.

Defined precisely, it is the specific disease or condition a drug is intended to treat or prevent. Regulators approve a drug for named indications based on trial evidence, and a single drug may carry several approved indications gathered over time.

Choosing an indication is a strategic decision that affects which patients are studied, how the trials are designed, and how big the eventual market is. When a drug turns out to help with a disease beyond its original use, pursuing that new indication is called repurposing or repositioning.