Get emergency medical help if you have signs of an allergic reaction to furosemide: hives; difficulty breathing; swelling of your face, lips, tongue, or throat.
Call your doctor at once if you have:
- ringing in your ears, hearing loss;
- confusion, drowsiness, problems with memory or speech;
- jaundice (dark urine, yellowing of the skin or eyes);
- severe pain in your upper stomach spreading to your back;
- nausea, vomiting, loss of appetite, sweet or musty breath odor;
- pale skin, easy bruising or bleeding;
- sudden weakness or ill feeling, fever, chills, sore throat;
- signs of an electrolyte imbalance – dry mouth, increased thirst, mood changes, muscle pain or weakness, lack of energy, fast heartbeats, little or no urination;
- kidney problems – little or no urination, painful or difficult urination, swelling in your feet or ankles, feeling tired or short of breath; or
- severe skin reaction – fever, sore throat, swelling in your face or tongue, burning in your eyes, skin pain followed by a red or purple skin rash that spreads (especially in the face or upper body) and causes blistering and peeling.
Common furosemide side effects may include:
- numbness or tingling;
- headache, dizziness; or
- blurred vision.
This is not a complete list of side effects and others may occur.