Key takeaways
Furosemide (Lasix) and chlorthalidone (Thalitone) are both diuretics, but they belong to different classes and have some key differences. Furosemide is a loop diuretic, while chlorthalidone is a thiazide-like diuretic. Furosemide is typically used to relieve swelling from extra fluids and can also lower blood pressure, though it's not a first-choice option for hypertension. In contrast, chlorthalidone is primarily used to treat high blood pressure and can also help with swelling. Furosemide is available in both tablet and oral solution forms, whereas chlorthalidone is only available as a tablet. Furosemide works quickly, within about an hour, and its effects last for about 6 to 8 hours, while chlorthalidone takes 2 to 3 hours to start working and can last up to 3 days. Both medications can cause you to urinate more often and may lead to dizziness, but chlorthalidone has a higher risk of causing gout attacks. Additionally, both medications are not suitable for people with sulfa allergies.
