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Furosemide Side Effects

Call your doctor right away if you notice any of these side effects:

Allergic reaction: Itching or hives, swelling in your face or hands, swelling or tingling in your mouth or throat, chest tightness, trouble breathing

Blistering, peeling, red skin rash

Chest pain, shortness of breath

Confusion, weakness, muscle twitching

Dry mouth, increased thirst, muscle cramps, nausea or vomiting, uneven heartbeat

Sudden and severe stomach pain, nausea, vomiting, fever, lightheadedness

Hearing loss, ringing in the ears

Lightheadedness, dizziness, fainting

Severe diarrhea

Unusual bleeding or bruising

Yellow skin or eyes

If you notice these less serious side effects, talk with your doctor:

Loss of appetite, stomach cramps

If you notice other side effects that you think are caused by this medicine, tell your doctor.

Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088.

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 immediately if any of the following side effects occur:

Rare

  • Chest pain
  • chills
  • cough or hoarseness
  • general feeling of tiredness or weakness
  • lower back or side pain
  • painful or difficult urination
  • shortness of breath
  • sore throat
  • sores, ulcers, or white spots on the lips or in the mouth
  • swollen or painful glands
  • tightness in the chest
  • unusual bleeding or bruising
  • unusual tiredness or weakness
  • wheezing

Incidence not known

  • Back or leg pains
  • black, tarry stools
  • blistering, peeling, or loosening of the skin
  • bloating
  • blood in the urine or stools
  • blurred vision
  • burning, crawling, itching, numbness, prickling, "pins and needles", or tingling feelings
  • changes in skin color, pain, tenderness, or swelling of the foot or leg
  • clay-colored stools
  • cloudy urine
  • cold sweats
  • confusion
  • continuing ringing or buzzing or other unexplained noise in the ears
  • cracks in the skin
  • darkened urine
  • difficulty breathing
  • dizziness, faintness, or lightheadedness when getting up from a lying or sitting position
  • dry mouth
  • fast heartbeat
  • flushed, dry skin
  • fruit-like breath odor
  • greatly decreased frequency of urination or amount ofurine
  • hearing loss
  • increased hunger
  • increased thirst
  • indigestion
  • itching
  • loss of appetite
  • nosebleeds
  • pain in the joints or muscles
  • pains in the stomach, side, or abdomen, possibly radiating to the back
  • pale skin
  • pinpoint red spots on the skin
  • red, irritated eyes
  • red, swollen skin
  • spots on your skin resembling a blister or pimple
  • sweating
  • swelling of the feet or lower legs
  • trouble breathing with exertion
  • unusual weight loss
  • yellow eyes or skin

Get emergency help immediately if any of the following symptoms of overdose occur:

Symptoms of overdose

Some 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. Also, your health care professional may be able to tell you about ways to prevent or reduce some of these side effects. Check with your health care professional if any of the following side effects continue or are bothersome or if you have any questions about them:

Incidence not known

  • Feeling of constant movement of self or surroundings
  • hives or welts
  • increased sensitivity of the skin to sunlight
  • redness or other discoloration of the skin
  • restlessness
  • sensation of spinning
  • severe sunburn
  • weakness

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

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