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If you take sucralfate (Carafate), take it at least 2 hours before or after you take furosemide.

Before taking this medication, tell your doctor if you are using any of the following drugs:

• lithium;

• digoxin (Lanoxin);

• steroids (prednisone and others);

• ethacrynic acid (Edecrin);

• diet pills or cold medicine;

• other blood pressure medications;

• amikacin (Amikin), gentamicin (Garamycin), netilmicin (Netromycin), streptomycin, tobramycin (Nebcin, Tobi);

• salicylates such as aspirin, Disalcid, Doan's Pills, Dolobid, Salflex, Tricosal, and others; or

• indomethacin.

This list is not complete and there may be other drugs that can interact with furosemide. Tell your doctor about all the prescription and over-the-counter medications you use. This includes vitamins, minerals, herbal products, and drugs prescribed by other doctors. Do not start using a new medication without telling your doctor.

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. Tell your doctor about any unusual or bothersome side effect.