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(acetyl sulfisoxazole) Pediatric Suspension


Gantrisin (acetyl sulfisoxazole pediatric suspension) (sulfisoxazole) is an antibacterial sulfonamide available as a pediatric suspension for oral administration. Each teaspoonful (5 mL) of the pediatric suspension contains the equivalent of approximately 0.5 gm sulfisoxazole in the form of acetyl sulfisoxazole in a vehicle containing 0.3% alcohol, carboxymethylcellulose (sodium), citric acid, methylcellulose, parabens (methyl and propyl), partial invert sugar, sodium citrate, sorbitan monolaurate, sucrose, flavors and water.

Acetyl sulfisoxazole, the tasteless form of sulfisoxazole, is N1-acetyl sulfisoxazole and must be distinguished from N4-acetyl sulfisoxazole, which is a metabolite of sulfisoxazole. Acetyl sulfisoxazole is a white or slightly yellow, crystalline powder that is slightly soluble in alcohol and practically insoluble in water. Acetyl sulfisoxazole has a molecular weight of 309.34 and the following structural formula:

GANTRISIN®  (sulfisoxazole)  Structural Formula Illustration

What are the possible side effects of sulfisoxazole ()?

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 a serious side effect such as:

  • 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...

Read All Potential Side Effects and See Pictures of Gantrisin »

Last reviewed on RxList: 9/16/2008
This monograph has been modified to include the generic and brand name in many instances.

Report Problems to the Food and Drug Administration


You are encouraged to report negative side effects of prescription drugs to the FDA. Visit the FDA MedWatch website or call 1-800-FDA-1088.

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