What type of substance is Hydrochlorothiazide classified as?

Hydrochlorothiazide is classified as an antihypertensive drug, specifically a thiazide diuretic. Its primary use is to manage hypertension (high blood pressure) and edema (fluid retention) caused by various conditions, including heart failure and kidney disorders.

Thiazide diuretics like hydrochlorothiazide work by promoting the excretion of sodium and water through the urine, leading to a decrease in blood volume. This reduction in blood volume helps lower blood pressure, making it effective in the treatment of hypertension.

In contrast, anticoagulants are substances that prevent blood clotting, anticancer drugs are used to treat various forms of cancer, and hallucinogens are substances that alter perception and consciousness. None of these classifications apply to hydrochlorothiazide, which is why its designation as an antihypertensive drug is accurate.