GENERIC NAME: FUROSEMIDE 500MG TABLET - ORAL (fyou-ROW-seh-mide)
WARNING: This is a very potent medication. Using too much of this drug can lead to serious water and mineral loss. Therefore, it is important that you are closely monitored by your doctor. Tell your doctor immediately if you become very thirsty or confused, or develop muscle cramps/weakness while taking this medication. See also Side Effects section.
USES: Furosemide is a "water pill" (diuretic) that increases the amount of urine you make, which causes your body to get rid of excess water. This drug is used on a short-term basis in a hospital setting. It is used to treat adults with severe kidney disease who have not responded to usual doses of furosemide.
HOW TO USE: Take this medication by mouth with or without food, as directed by your doctor. The dosage is based on your medical condition and response to therapy. Only 1 or 2 doses are usually needed to see a benefit. In children, doses greater than 6 mg per kilogram of body weight are not recommended. Sucralfate, cholestyramine, and colestipol can decrease the absorption of furosemide. If you are taking any of these drugs, separate them from furosemide by at least 2 hours. If your condition persists or worsens, contact your doctor or pharmacist.
SIDE EFFECTS: Dizziness, lightheadedness, headache, blurred vision, loss of appetite, stomach upset, diarrhea, or constipation may occur as your body adjusts to the medication. If any of these effects persist or worsen, notify your doctor or pharmacist promptly. This medication may lead to excessive loss of body water and minerals (including potassium). Tell your doctor immediately if you have any of these unlikely but serious symptoms of dehydration or mineral loss: muscle cramps or weakness, confusion, severe dizziness, drowsiness, unusual dry mouth or thirst, nausea or vomiting, fast/irregular heartbeat, unusual decrease in the amount of urine, fainting, seizures. Tell your doctor immediately if any of these unlikely but serious side effects occur: numbness/tingling of the arms/legs, ringing in the ears, hearing loss. Tell your doctor immediately if any of these highly unlikely but very serious side effects occur: signs of infection (e.g., fever, persistent sore throat), easy bleeding or bruising, stomach/abdominal pain, persistent nausea/vomiting, yellowing of eyes/skin. A serious allergic reaction to this drug is unlikely, but seek immediate medical attention if it occurs. Symptoms of a serious allergic reaction include: rash, itching, swelling, severe dizziness, trouble breathing. If you notice other effects not listed above, contact your doctor or pharmacist.
PRECAUTIONS: Before taking furosemide, tell your doctor or pharmacist if you are allergic to it; or to sulfa medications; or if you have any other allergies. This medication should not be used if you have certain medical conditions. Before using this medicine, consult your doctor or pharmacist if you have: the inability to make urine (anuria). Before using this medication, tell your doctor or pharmacist your medical history, especially of: kidney disease, liver disease, untreated mineral imbalance (e.g., sodium, potassium), gout, lupus. If you have diabetes, furosemide may worsen control of blood glucose levels. Monitor your blood glucose levels regularly and inform your doctor of the results. This drug may reduce the potassium levels in your blood. Ask your doctor about adding potassium to your diet. A potassium supplement may be prescribed by your doctor. This medication may make you more sensitive to the sun. Avoid prolonged sun exposure, use a sunscreen, and wear protective clothing when outdoors. This drug may make you dizzy, drowsy, or cause blurred vision; use caution engaging in activities requiring alertness such as driving or using machinery. Limit alcoholic beverages. To minimize dizziness and lightheadedness, get up slowly when rising from a seated or lying position. Caution is advised when using this drug in the elderly because they may be more sensitive to its effects, especially dizziness. Furosemide should be used only when clearly needed during pregnancy. Discuss the risks and benefits with your doctor. This drug passes into breast milk. Consult your doctor before breast-feeding.
DRUG INTERACTIONS: See also the How to Use section. This drug should not be used with the following medications because very serious interactions may occur: cisapride, ethacrynic acid. If you are currently using any of these medications, tell your doctor or pharmacist before starting furosemide. Before using this medication, tell your doctor or pharmacist of all prescription and nonprescription/herbal products you may use, especially of: other drugs that can affect hearing/balance (e.g., aminoglycoside antibiotics such as gentamicin, tobramycin), amphotericin B, cholestyramine, cisplatin, colestipol, corticosteroids (e.g., prednisone), digoxin, lithium, nonsteroidal anti-inflammatory drugs (NSAIDs such as ibuprofen, indomethacin), large doses of aspirin and aspirin-like drugs (salicylates), sucralfate. Check the labels on all your medicines (e.g., cough-and-cold products, diet aids, NSAIDs for pain/fever reduction) because they may contain ingredients that could increase your blood pressure or swelling (edema). Ask your pharmacist about the safe use of those products. Do not start or stop any medicine without doctor or pharmacist approval.
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OVERDOSE: If overdose is suspected, contact your local poison control center or emergency room immediately. US residents can call the US national poison hotline at 1-800-222-1222. Canadian residents should call their local poison control center directly. Symptoms of overdose may include fainting or severe weakness.
NOTES: Do not share this medication with others. Laboratory and/or medical tests (e.g., kidney and liver function, uric acid, blood mineral levels such as potassium) should be performed periodically to monitor your progress or check for side effects. Consult your doctor for more details. Have your blood pressure checked regularly while taking this medication. Discuss with your doctor how to monitor your own blood pressure.
MISSED DOSE: If you miss a dose, use it as soon as you remember. If it is near the time of the next dose, skip the missed dose and resume your usual dosing schedule. Do not double the dose to catch up.
STORAGE: Store at room temperature between 59-86 degrees F (15-30 degrees C) away from light and moisture. Do not store in the bathroom. Keep all medicines away from children and pets.
MEDICAL ALERT: Your condition can cause complications in a medical emergency. For enrollment information call MedicAlert at 1-800-854-1166 (USA), or 1-800-668-1507 (Canada).
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