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Brand Names: Gantrisin Pediatric

Generic Name: sulfisoxazole (Pronunciation: sul fi SOX a zole)

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

What is sulfisoxazole (Gantrisin)?

Sulfisoxazole is a sulfonamide ("sulfa") antibiotic that helps keep bacteria from growing in your body.

Sulfisoxazole is used to treat or prevent many different types of infections caused by bacteria, such as bladder infections, ear infections, or meningitis.

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

What are the possible side effects of sulfisoxazole (Gantrisin)?

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.

Call your doctor at once if you have any of these serious side effects:

• diarrhea that is watery or bloody;
• fever, chills, body aches, flu symptoms;
• cough, feeling short of breath, pale skin, joint pain, unusual bruising;
• fast or pounding heartbeat;
• blue lips or fingernails, feeling light-headed, fainting;
• swelling around your neck or throat;
• urinating more or less than usual;
• severe pain in your side or lower back, blood in your urine;
• nausea, stomach pain, low fever, loss of appetite, dark urine, clay-colored stools, jaundice (yellowing of the skin or eyes);
• fever, sore throat, and headache with a severe blistering, peeling, and red skin rash;
• agitation, confusion, unusual thoughts or behavior; or
• seizure (black-out or convulsions).

Less serious side effects may include:

• mild stomach pain, bloating, gas;
• headache, dizziness;
• ringing in your ears; or
• swollen, black, or "hairy" tongue.

This is not a complete list of side effects and others may occur. Tell your doctor about any unusual or bothersome side effect. You may report side effects to FDA at 1-800-FDA-1088.

What is the most important information I should know about sulfisoxazole (Gantrisin)?

Take this medication for the entire length of time prescribed by your doctor. Your symptoms may get better before the infection is completely treated. Sulfisoxazole will not treat a viral infection such as the common cold or flu.

Do not give this medication to another person, even if they have the same symptoms you do.

Antibiotic medicines can cause diarrhea, which may be a sign of a new infection. If you have diarrhea that is watery or has blood in it, call your doctor. Do not use any medicine to stop the diarrhea unless your doctor has told you to.