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Brand Names: Lasix

Generic Name: furosemide (Pronunciation: fur OH se mide)

• What is furosemide (Lasix)?
• What are the possible side effects of furosemide
• What is the most important information I should know about furosemide (Lasix)?
• What should I discuss with my healthcare provider before taking furosemide (Lasix)?
• How should I take furosemide (Lasix)?
• What happens if I miss a dose (Lasix)?
• What happens if I overdose (Lasix)?
• What should I avoid while taking furosemide (Lasix)?
• What other drugs will affect furosemide (Lasix)?
• Where can I get more information?

What is furosemide (Lasix)?

Furosemide is a loop diuretic (water pill) that prevents your body from absorbing too much salt, allowing the salt to instead be passed in your urine.

Furosemide treats fluid retention (edema) in people with congestive heart failure, liver disease, or a kidney disorder such as nephrotic syndrome. This medication is also used to treat high blood pressure (hypertension).

Furosemide may also be used for other purposes not listed in this medication guide.

Furosemide 20 mg-GG

round, white, imprinted with GG 21

Furosemide 20 mg-IVA

round, white, imprinted with Logo 2908

Furosemide 20 mg-MYL

round, white, imprinted with M2

Furosemide 20 mg-ROX

round, white, imprinted with 54 840

Furosemide 20 mg-WAT

oval, white, imprinted with 3436, WATSON

Furosemide 40 mg-GG

round, white, imprinted with GG 201

Furosemide 40 mg-IVA

round, white, imprinted with Logo 2907

Furosemide 40 mg-MYL

round, white, imprinted with MYLAN 216, 40

Furosemide 40 mg-ROX

round, white, imprinted with 54 583

Furosemide 40 mg-WAT

round, white, imprinted with WATSON 3437

Furosemide 80 mg-GG

round, white, imprinted with GG 80

Furosemide 80 mg-MYL

round, white, imprinted with MYLAN 232, 80

Furosemide 80 mg-ROX

round, white, imprinted with 54 533

Furosemide 80 mg-WAT

round, white, imprinted with WATSON 3438

Lasix 20 mg

oval, white, imprinted with LASIX (R), HOECHST

Lasix 40 mg

round, white, imprinted with LASIX (R) 40, HOECHST

Lasix 80 mg

round, white, imprinted with LASIX (R) 80, HOECHST

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 any of these serious side effects:

• dry mouth, thirst, nausea, vomiting;
• feeling weak, drowsy, restless, or light-headed;
• fast or uneven heartbeat;
• muscle pain or weakness;
• urinating less than usual or not at all;
• easy bruising or bleeding, unusual weakness;
• a red, blistering, peeling skin rash;
• hearing loss; or
• nausea, stomach pain, low fever, loss of appetite, dark urine, clay-colored stools, jaundice (yellowing of the skin or eyes).

Less serious side effects may include:

• diarrhea, constipation, or stomach pain;
• headache;
• numbness, burning, pain, or tingly feeling;
• 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. You may report side effects to FDA at 1-800-FDA-1088.

What is the most important information I should know about furosemide (Lasix)?

Do not use this medication if you are unable to urinate.

Before using this medication, tell your doctor if you have kidney disease, liver disease, gout, lupus, diabetes, or an allergy to sulfa drugs.

To be sure this medication is not causing harmful effects, your blood will need to be tested on a regular basis. Your kidney or liver function may also need to be tested. Do not miss any scheduled appointments.

Furosemide will make you urinate more often and you may get dehydrated easily. Follow your doctor's instructions about using potassium supplements or getting enough salt and potassium in your diet.

Avoid becoming dehydrated. Follow your doctor's instructions about the type and amount of liquids you should drink while you are taking furosemide.

If you are being treated for high blood pressure, keep using this medication even if you feel fine. High blood pressure often has no symptoms.