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Lasix

Last reviewed on RxList: 6/15/2020
Lasix Side Effects Center

What Is Lasix?

Lasix (furosemide) is an anthranilic acid derivative that is used as a strong diuretic in adults and children to treat excessive fluid accumulation (edema) caused by congestive heart failure, liver failure, renal failure, and nephritic syndrome. Lasix may be used with antihypertensive drugs to control high blood pressure (hypertension). Lasix is available as a generic.

What Are Side Effects of Lasix?

Side effects of Lasix include:

  • increased urination,
  • thirst,
  • muscle cramps,
  • itching or rash,
  • weakness,
  • dizziness,
  • spinning sensation,
  • diarrhea,
  • stomach pain, and
  • constipation.

Serious side effects of Lasix include:

Dosage for Lasix

Lasix is available in tablet (20 to 80 mg) and IV forms. Dosage is determined by the patient's physician and varies according to how much fluid and how fast the fluid should be removed. Patients with poor renal function usually require higher doses; doses in children are weight-based.

What Drugs, Substances, or Supplements Interact with Lasix?

Lasix may interact with sucralfate, cisplatin, cyclosporine, ethacrynic acid, lithium, methotrexate, phenytoin, antibiotics, heart or blood pressure medications, laxatives, salicylates such as aspirin, or steroids. Tell your doctor all medications and supplements you use.

Lasix During Pregnancy and Breastfeeding

Tell your doctor if you are pregnant or plan to become pregnant while using Lasix; it is unknown if it will harm a fetus. Lasix passes into breast milk and may harm a nursing baby. Lasix may also slow breast milk production. Consult your doctor before breastfeeding.

Additional Information

Our Lasix Side Effects Drug Center provides a comprehensive view of available drug information on the potential side effects when taking this medication.

This is not a complete list of side effects and others may occur. Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088.

SLIDESHOW

Heart Disease: Symptoms, Signs, and Causes See Slideshow
Lasix Consumer Information

Get emergency medical help if you have signs of an allergic reaction (hives, difficult breathing, swelling in your face or throat) or a severe skin reaction (fever, sore throat, burning in your eyes, skin pain, red or purple skin rash that spreads and causes blistering and peeling).

Call your doctor at once if you have:

  • a light-headed feeling, like you might pass out;
  • ringing in your ears, hearing loss;
  • muscle spasms or contractions;
  • pale skin, easy bruising, unusual bleeding;
  • high blood sugar--increased thirst, increased urination, dry mouth, fruity breath odor;
  • kidney problems--little or no urination, swelling in your feet or ankles, feeling tired or short of breath;
  • signs of liver or pancreas problems--loss of appetite, upper stomach pain (that may spread to your back), nausea or vomiting, dark urine, jaundice (yellowing of the skin or eyes); or
  • signs of an electrolyte imbalance--dry mouth, thirst, weakness, drowsiness, feeling jittery or unsteady, vomiting, irregular heartbeats, fluttering in your chest, numbness or tingling, muscle cramps, muscle weakness or limp feeling.

Common side effects may include:

  • diarrhea, constipation, loss of appetite;
  • numbness or tingling;
  • headache, dizziness; or
  • blurred vision.

This is not a complete list of side effects and others may occur. Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088.

Read the entire detailed patient monograph for Lasix (Furosemide)

QUESTION

In the U.S., 1 in every 4 deaths is caused by heart disease. See Answer
Lasix Professional Information

SIDE EFFECTS

Adverse reactions are categorized below by organ system and listed by decreasing severity.

Gastrointestinal System Reactions

  1. hepatic encephalopathy in patients with hepatocellular insufficiency
  2.  pancreatitis
  3.  jaundice (intrahepatic cholestatic jaundice)
  4. increased liver enzymes
  5. anorexia
  6. oral and gastric irritation
  7. cramping
  8. diarrhea
  9. constipation
  10. nausea
  11. vomiting

Systemic Hypersensitivity Reactions

  1. Severe anaphylactic or anaphylactoid reactions (e.g. with shock)
  2. systemic vasculitis
  3. interstitial nephritis
  4. necrotizing angiitis

Central Nervous System Reactions

  1. tinnitus and hearing loss
  2. paresthesias
  3. vertigo
  4. dizziness
  5. headache
  6. blurred vision
  7. xanthopsia

Hematologic Reactions

  1. aplastic anemia
  2. thrombocytopenia
  3. agranulocytosis
  4. hemolytic anemia
  5. leukopenia
  6. anemia
  7. eosinophilia

Dermatologic-Hypersensitivity Reactions

  1. toxic epidermal necrolysis
  2. Stevens-Johnson Syndrome
  3. erythema multiforme
  4. drug rash with eosinophilia and systemic symptoms
  5. acute generalized exanthematous pustulosis
  6. exfoliative dermatitis
  7. bullous pemphigoid
  8. purpura
  9. photosensitivity
  10. rash
  11. pruritis
  12. urticaria

Cardiovascular Reaction

  1. Orthostatic hypotension may occur and be aggravated by alcohol, barbiturates or narcotics.
  2. Increase in cholesterol and triglyceride serum levels

Other Reactions

  1. hyperglycemia
  2. glycosuria
  3. hyperuricemia
  4. muscle spasm
  5. Weakness
  6. restlessness
  7. urinary bladder spasm
  8. thrombophlebitis
  9. fever

Whenever adverse reactions are moderate or severe, LASIX dosage should be reduced or therapy withdrawn.

Read the entire FDA prescribing information for Lasix (Furosemide)

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