What is this medicine?

FUROSEMIDE (fyoor OH se mide) is a diuretic. It helps you make more urine and to lose salt and excess water from your body. This medicine is used to treat high blood pressure, and edema or swelling from heart, kidney, or liver disease.

This medicine may be used for other purposes; ask your health care provider or pharmacist if you have questions.

COMMON BRAND NAME(S): Active-Medicated Specimen Kit, Delone, Diuscreen, Lasix, RX Specimen Collection Kit, Specimen Collection Kit, URINX Medicated Specimen Collection

What should I tell my health care provider before I take this medicine?

They need to know if you have any of these conditions:

  • abnormal blood electrolytes
  • diarrhea or vomiting
  • gout
  • heart disease
  • kidney disease, small amounts of urine, or difficulty passing urine
  • liver disease
  • thyroid disease
  • an unusual or allergic reaction to furosemide, sulfa drugs, other medicines, foods, dyes, or preservatives
  • pregnant or trying to get pregnant
  • breast-feeding

How should I use this medicine?

Take this medicine by mouth with a glass of water. Follow the directions on the prescription label. You may take this medicine with or without food. If it upsets your stomach, take it with food or milk. Do not take your medicine more often than directed. Remember that you will need to pass more urine after taking this medicine. Do not take your medicine at a time of day that will cause you problems. Do not take at bedtime.

Talk to your pediatrician regarding the use of this medicine in children. While this drug may be prescribed for selected conditions, precautions do apply.

Overdosage: If you think you have taken too much of this medicine contact a poison control center or emergency room at once.

NOTE: This medicine is only for you. Do not share this medicine with others.

What if I miss a dose?

If you miss a dose, take it as soon as you can. If it is almost time for your next dose, take only that dose. Do not take double or extra doses.

What may interact with this medicine?

  • aspirin and aspirin-like medicines
  • certain antibiotics
  • chloral hydrate
  • cisplatin
  • cyclosporine
  • digoxin
  • diuretics
  • laxatives
  • lithium
  • medicines for blood pressure
  • medicines that relax muscles for surgery
  • methotrexate
  • NSAIDs, medicines for pain and inflammation like ibuprofen, naproxen, or indomethacin
  • phenytoin
  • steroid medicines like prednisone or cortisone
  • sucralfate
  • thyroid hormones

This list may not describe all possible interactions. Give your health care provider a list of all the medicines, herbs, non-prescription drugs, or dietary supplements you use. Also tell them if you smoke, drink alcohol, or use illegal drugs. Some items may interact with your medicine.

What should I watch for while using this medicine?

Visit your doctor or health care provider for regular checks on your progress. Check your blood pressure regularly. Ask your doctor or health care provider what your blood pressure should be, and when you should contact him or her. If you are a diabetic, check your blood sugar as directed.

This medicine may cause serious skin reactions. They can happen weeks to months after starting the medicine. Contact your health care provider right away if you notice fevers or flu-like symptoms with a rash. The rash may be red or purple and then turn into blisters or peeling of the skin. Or, you might notice a red rash with swelling of the face, lips or lymph nodes in your neck or under your arms.

You may need to be on a special diet while taking this medicine. Check with your doctor. Also, ask how many glasses of fluid you need to drink a day. You must not get dehydrated.

You may get drowsy or dizzy. Do not drive, use machinery, or do anything that needs mental alertness until you know how this drug affects you. Do not stand or sit up quickly, especially if you are an older patient. This reduces the risk of dizzy or fainting spells. Alcohol can make you more drowsy and dizzy. Avoid alcoholic drinks.

This medicine can make you more sensitive to the sun. Keep out of the sun. If you cannot avoid being in the sun, wear protective clothing and use sunscreen. Do not use sun lamps or tanning beds/booths.

What side effects may I notice from receiving this medicine?

Side effects that you should report to your doctor or health care professional as soon as possible:

  • blood in urine or stools
  • dry mouth
  • fever or chills
  • hearing loss or ringing in the ears
  • irregular heartbeat
  • muscle pain or weakness, cramps
  • rash, fever, and swollen lymph nodes
  • redness, blistering, peeling or loosening of the skin, including inside the mouth
  • skin rash
  • stomach upset, pain, or nausea
  • tingling or numbness in the hands or feet
  • unusually weak or tired
  • vomiting or diarrhea
  • yellowing of the eyes or skin

Side effects that usually do not require medical attention (report to your doctor or health care professional if they continue or are bothersome):

  • headache
  • loss of appetite
  • unusual bleeding or bruising

This list may not describe all possible side effects. Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088.

Where should I keep my medicine?

Keep out of the reach of children.

Store at room temperature between 15 and 30 degrees C (59 and 86 degrees F). Protect from light. Throw away any unused medicine after the expiration date.

NOTE: This sheet is a summary. It may not cover all possible information. If you have questions about this medicine, talk to your doctor, pharmacist, or health care provider.

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