Compare Lasix vs. Demadex

Furosemide (Lasix) and torsemide (Demadex, Soaanz) are both loop diuretics, also known as water pills, used to relieve swelling from extra fluid and sometimes to lower blood pressure. Furosemide is available in both tablet and oral solution forms, while torsemide is only available as a tablet. Furosemide is typically taken once or twice daily, whereas torsemide is usually taken once daily. Both medications start working in about an hour and last 6 to 8 hours. Both medications can cause side effects like dizziness, headaches, and tinnitus. Both medications can cause low potassium, and you may need to take potassium supplements. Both medications require laboratory monotoring and are available as lower-cost generics.