Along with its needing effects, a drug 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 family doctor as soon as possible if any of the following side effects was happen
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
More common side effects may occur that usually do not need medical attention. These side effects may go away during treat as your body adjusts to the drug. However, check with your family 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
More common side effects not listed above may also occur in some diseaseds. If you have any other problems, check with your family doctor.