Certification of Pharmacy Technicians (ExCPT) Practice Exam

Which of the following medications is known to be a diuretic?

1. Furosemide

2. Lovastatin

3. Hydroxyzine

4. Hydralazine

The correct answer is: Furosemide

Furosemide is classified as a loop diuretic, which means it helps the body eliminate excess fluid by increasing urine production. Diuretics like furosemide work by inhibiting the reabsorption of sodium and chloride in the kidneys, specifically within the ascending loop of Henle. This action leads to increased excretion of water, thereby reducing blood volume and lowering blood pressure. It is often prescribed for conditions such as hypertension, heart failure, and edema. In contrast, lovastatin is a medication used to lower cholesterol levels; hydroxyzine is an antihistamine often used for anxiety and allergies; and hydralazine is a vasodilator generally prescribed to treat high blood pressure. Each of these medications serves different purposes and mechanisms of action, making furosemide the clear choice as a diuretic among the options provided.