Furosemide (Intramuscular Route, Intravenous Route)

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Side Effects

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 or nurse immediately if any of the following side effects occur:

• Chest pain
• Chills
• Cough or hoarseness
• Fever
• General feeling of tiredness or weakness
• Headache
• 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

• Back or leg pains
• Black, tarry stools
• Bladder spasm
• Bleeding gums
• Blistering, peeling, or loosening of the skin
• Bloating
• Bloody or cloudy urine
• Blurred vision
• Burning, crawling, itching, numbness, prickling, "pins and needles", or tingling feelings
• Changes in the skin color, pain, tenderness, or swelling of foot or leg
• Clay-colored stools
• Cold sweats
• Confusion
• Constipation
• Continuing ringing or buzzing or other unexplained noise in the ears
• Coughing up blood
• Cracks in the skin
• Darkened urine
• Diarrhea
• Difficulty with breathing or swallowing
• Dizziness
• Dizziness, faintness, or lightheadedness when getting up from a lying or sitting position
• Dry mouth
• Fast heartbeat
• Fever with or without chills
• Flushed, dry skin
• Fruit-like breath odor
• General body swelling
• Greatly decreased frequency of urination or amount of urine
• Hearing loss
• Hives
• Increased hunger
• Increased thirst
• Increased urination
• Indigestion
• Itching
• Joint stiffness or swelling
• Loss of appetite
• Loss of heat from the body
• Nausea or vomiting
• Nosebleeds
• Pain in the joints or muscles
• Pain where a shot was given
• Pains in the stomach, side, or abdomen, possibly radiating to the back
• Pale skin
• Pinpoint red spots on the skin
• Puffiness or swelling of the eyelids or around the eyes, face, lips, or tongue
• Red, irritated eyes
• Red, swollen skin
• Scaly skin
• Severe abdominal or stomach pain
• Skin rash
• Stomach cramps
• Sugar in the urine
• Sweating
• Swelling of the feet or lower legs
• Troubled breathing with exertion
• Unpleasant breath odor
• Unusual weight loss
• Vomiting of blood
• Yellow eyes or skin

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

• Decreased urination
• Drowsiness
• Fainting
• Increase in heart rate
• Irregular heartbeat
• Irritability
• Muscle cramps
• Numbness, tingling, pain, or weakness in the hands, feet, or lips
• Rapid breathing
• Seizures
• Sunken eyes
• Thirst
• Trembling
• Weak pulse
• Weakness and heaviness of the legs
• Wrinkled skin

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:

• Feeling of constant movement of self or surroundings
• Hives or welts
• Increased sensitivity of the skin to sunlight
• Muscle spasm
• 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.

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

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