Lasix^® (furosemide) is licensed to treat high blood pressure and fluid retention. The medication helps to decrease blood volume by increasing the amount of salt and water that the kidneys remove from the blood. Lasix comes in a tablet form that is usually taken once or twice daily. The Lasix dosage your healthcare provider prescribes will vary depending on several factors, such as how you respond to Lasix, other medical conditions you may have, and other medications you are taking. Prior to taking Lasix, be sure to tell your healthcare provider if you have liver or kidney disease, diabetes, or any allergies.