Diuretics, Loop (Systemic)

Side Effects of This Medicine

Along with its needed effects, a medicine may cause some unwanted effects. Although not all of these side effects may occur, if they do occur they may need medical attention.

Check with your doctor as soon as possible if any of the following side effects occur:

Rare

Black, tarry stools; blood in urine or stools; cough or hoarseness; fever or chills; joint pain; lower back or side pain; painful or difficult urination; pinpoint red spots on skin; ringing or buzzing in ears or any loss of hearing - more common with ethacrynic acid; skin rash or hives; stomach pain (severe) with nausea and vomiting; unusual bleeding or bruising; yellow eyes or skin; yellow vision - for furosemide only

Signs and symptoms of too much potassium loss

Dryness of mouth; increased thirst; irregular heartbeat; mood or mental changes; muscle cramps or pain; nausea or vomiting; unusual tiredness or weakness; weak pulse

Other side effects may occur that usually do not need medical attention. These side effects may go away during treatment as your body adjusts to the medicine. However, check with your doctor if any of the following side effects continue or are bothersome:

More common

Dizziness or lightheadedness when getting up from a lying or sitting position

Less common or rare

Blurred vision; chest pain - with bumetanide only; confusion - with ethacrynic acid only; diarrhea - more common with ethacrynic acid; headache; increased sensitivity of skin to sunlight - with furosemide only; loss of appetite - more common with ethacrynic acid; nervousness - with ethacrynic acid only; premature ejaculation or difficulty in keeping an erection - with bumetanide only; redness or pain at place of injection; stomach cramps or pain

Other side effects not listed above may also occur in some patients. If you notice any other effects, check with your doctor.