Furosemide is in a class of drugs called loop diuretics (water pills). It decreases the amount of fluid in the body by increasing the amount of salt and water lost in the urine. Furosemide is used to reduce swelling in the body caused by congestive heart failure, liver disease, or kidney disease. Furosemide may also be used for purposes other than those listed in this medication guide.
Important information :

To reduce nighttime urination, take furosemide early in the day unless otherwise directed by your doctor.

Promptly report any muscle weakness or cramps to your doctor.


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LASIX may cause dizziness and lightheadedness especially during the first few days as your body adjusts to it. Rise slowly from a seated or lying position. It may also increase sensitivity to sunlight. Blurred vision, loss of appetite, itching, stomach upset, headache and weakness may also occur during initial therapy as your body adjusts to the medication. Inform your doctor if you develop muscle cramps, pain, nausea or vomiting while taking LASIX. It may be a sign of low blood potassium. Contact your doctor if you experience dry mouth, thirst, unusual bleeding or bruising, rash, yellow eyes or skin, severe nausea or vomiting, or ringing in ears. LASIX increases urination. Expect this effect. In the unlikely event you have an allergic reaction to this drug, seek medical attention immediately. Symptoms of an allergic reaction include rash, itching, swelling, dizziness or trouble breathing. If you notice other effects not listed above, contact your doctor or pharmacist.

LASIX: May take with food or milk if stomach upset occurs. If LASIX is taken in the late afternoon or evening, you may need to get up during the night to urinate. Consult with your doctor regarding your dosing schedule.

LASIX WARNING:

LASIX is a strong "water pill" (diuretic). Using too much of LASIX can lead to serious water and mineral loss. Therefore, it is important you be monitored by your doctor. Promptly notify your doctor if you become very thirsty, have a dry mouth, become confused, or develop muscle cramps/weakness.

LASIX PRECAUTIONS:

Before using LASIX, tell your doctor your medical history especially of kidney problems, unusual decrease in urine output, liver disease, diabetes and of any drug allergies. LASIX may reduce the potassium levels in your blood. Ask your doctor about adding potassium to your diet. A potassium supplement may be prescribed by your doctor. Furosemide may make you more sensitive to sunlight. Use a sunscreen and wear protective clothing. Alcohol may intensify side effects. Limit your alcohol intake. Furosemide should be used only when clearly needed during pregnancy. Discuss the risks and benefits with your doctor. LASIX is excreted into breast milk. Though, to date, no problems have been reported to nursing infants, consult your doctor before breast-feeding.

Tell your doctor of all prescription and nonprescription drugs you may use, especially of "blood thinner" drugs such as warfarin, lithium, aminoglycosides (e.g., neomycin, kanamycin, gentamicin), large doses of salicylates (aspirin and aspirin-like drugs), sucralfate, ethacrynic acid or other diuretics ("water pills"), digoxin, diabetic medication, NSAID (e.g., ibuprofen, naproxen), cisplatin, blood pressure medication, probenecid, cyclosporine, nasal decongestants and diet-control medicines. Do not start or stop any medicine without doctor or pharmacist approval.

If overdose is suspected, contact your local poison control center or emergency room immediately. Symptoms of overdose may include dry mouth, dizziness, excessive urination followed by a decrease in amount of urine, muscle cramps, weakness, and weak or irregular heartbeat.

If you miss a dose, take as soon as remembered; do not take if it is almost time for the next dose, instead, skip the missed dose and resume your usual dosing schedule. Do not "double-up" the dose to catch up.