What is the main purpose of diuretics?

Diuretics are primarily used to reduce fluid volume in the body by promoting the excretion of sodium and water through the kidneys. This mechanism is essential in managing conditions such as hypertension (high blood pressure), heart failure, and edema (swelling due to excess fluid). By decreasing fluid volume, diuretics help to lower blood pressure and reduce the workload on the heart.

The focus of diuretics is specifically on fluid regulation rather than affecting cardiac output directly, blocking norepinephrine receptors, or influencing blood sugar levels. While they can indirectly impact blood pressure and heart function, their main and most recognized purpose is to facilitate the removal of excess fluid from the body.