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Lasix

"What are diuretics and how do they work?

The amount of fluid (water) retained by the body is controlled primarily by the kidneys. This occurs due to the kidney's ability to control the retention and elimination of sodium and chlorid"...

Lasix

LASIX®
(furosemide) Tablets 20, 40, and 80 mg

WARNING

LASIX® (furosemide) is a potent diuretic which, if given in excessive amounts, can lead to a profound diuresis with water and electrolyte depletion. Therefore, careful medical supervision is required and dose and dose schedule must be adjusted to the individual patient's needs. (See DOSAGE AND ADMINISTRATION.)

DRUG DESCRIPTION

LASIX® is a diuretic which is an anthranilic acid derivative. LASIX tablets for oral administration contain furosemide as the active ingredient and the following inactive ingredients: lactose monohydrate NF, magnesium stearate NF, starch NF, talc USP, and colloidal silicon dioxide NF. Chemically, it is 4-chloro-N-furfuryl-5-sulfamoylanthranilic acid. LASIX is available as white tablets for oral administration in dosage strengths of 20, 40 and 80 mg. Furosemide is a white to off-white odorless crystalline powder. It is practically insoluble in water, sparingly soluble in alcohol, freely soluble in dilute alkali solutions and insoluble in dilute acids.

The CAS Registry Number is 54-31-9.

The structural formula is as follows:

LASIX® (furosemide) Structural Formula Illustration

What are the possible side effects of furosemide

Get emergency medical help if you have any of these signs of an allergic reaction: hives; difficulty breathing; swelling of your face, lips, tongue, or throat.

Stop using furosemide and call your doctor at once if you have a serious side effect such as:

  • ringing in your ears, hearing loss;
  • itching, loss of appetite, dark urine, clay-colored stools, jaundice (yellowing of the skin or eyes);
  • severe pain in your upper stomach spreading to your back, nausea and vomiting;
  • weight loss, body aches, numbness;
  • swelling, rapid weight gain, urinating less than...

Read All Potential Side Effects and See Pictures of Lasix »

What are the precautions when taking furosemide (Lasix)?

Before taking furosemide, tell your doctor or pharmacist if you are allergic to it; or if you have any other allergies. This product may contain inactive ingredients, which can cause allergic reactions or other problems. Talk to your pharmacist for more details.

Before using this medication, tell your doctor or pharmacist your medical history, especially of: kidney problems, liver problems, inability to make urine, gout, lupus.

If you have diabetes, furosemide may affect your blood sugar level. Check your blood sugar level regularly as directed and share the results with your doctor. Your doctor may need to adjust your diabetes medication or diet.

Furosemide may reduce the potassium level in your blood. Your doctor may instruct you to add potassium-rich foods to...

Read All Potential Precautions of Lasix »

Last reviewed on RxList: 4/11/2012
This monograph has been modified to include the generic and brand name in many instances.

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Lasix - User Reviews

Lasix User Reviews

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Here is a collection of user reviews for the medication Lasix sorted by most helpful. Patient Discussions FAQs

Report Problems to the Food and Drug Administration

 

You are encouraged to report negative side effects of prescription drugs to the FDA. Visit the FDA MedWatch website or call 1-800-FDA-1088.


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