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In this Article

• 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 happens if I miss a dose (Gantrisin)?

Take the missed dose as soon as you remember. If it is almost time for your next dose, skip the missed dose and take the medicine at your next regularly scheduled time. Do not take extra medicine to make up the missed dose.

What happens if I overdose (Gantrisin)?

Seek emergency medical attention if you think you have used too much of this medicine.

Overdose symptoms may include headache, drowsiness, nausea, vomiting, stomach pain, loss of appetite, fever, blood in your urine, pale skin, easy bruising or bleeding, flu-like symptoms, feeling light-headed, or fainting.

What should I avoid while taking sulfisoxazole (Gantrisin)?

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.

Sulfisoxazole can cause side effects that may impair your thinking or reactions. Be careful if you drive or do anything that requires you to be awake and alert.

Avoid exposure to sunlight or artificial UV rays (sunlamps or tanning beds). Sulfisoxazole can make your skin more sensitive to sunlight and sunburn may result. Use a sunscreen (minimum SPF 15) and wear protective clothing if you must be out in the sun.

What other drugs will affect sulfisoxazole (Gantrisin)?

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

• a blood thinner such as warfarin (Coumadin);
• methotrexate (Rheumatrex, Trexall); or
• diabetes medications you take by mouth, such as acetohexamide (Dymelor), chlorpropamide (Diabinese), glimepiride (Amaryl, Avandaryl, Duetact), glipizide (Glucotrol), glyburide (DiaBeta, Glynase PresTab, Micronase), tolazamide (Tolinase), or tolbutamide (Orinase).

This list is not complete and there may be other drugs that can interact with sulfisoxazole. 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.

Where can I get more information?

Your pharmacist can provide more information about sulfisoxazole.

Remember, keep this and all other medicines out of the reach of children, never share your medicines with others, and use this medication only for the indication prescribed.

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