1 What is Gantrisin?

Brand: Gantrisin

Generic: Acetyl Sulfisoxazole

Gantrisin is a drug used in the treatment of urinary tract infections (primarily pyelonephritis, pyelitis and cystitis) due to microorganisms such as Escherichia coli, Klebsiella-Enterobacter, staphylococcus and Proteus spp bacteria. It is also used in meningitis, otitis media (ear infection), trachoma, inclusion conjunctivitis, nocardiosis, chancroid, toxoplasmosis and malaria.

This drug is available as a suspension containing acetyl sulfisoxazole 0.5 gram in 5 milliliter.


You should read the product information leaflet before using this medication. If you have any questions, ask your doctor or pharmacist.

This medication should be taken by mouth as instructed by your doctor. Use a measuring spoon instead of an ordinary household spoon.

Your dosage is based on your medical condition and the way you will respond to treatment. Take this drug regularly to experience the most benefits. You should also take this drug at the same time each day.

If you miss a dose, use it as soon as you remember. Continue to use it as prescribed by your doctor or as stated on the package label.


Gantrisin may interact with medications such as:

  • Anticoagulants including warfarin
  • Thiopental
  • Methotrexate
  • Sulfonylureas

Side Effects

There are no side effects known aside from a possible allergic reaction in people who have previous or unknown hypersensitivity to the drug.

Watch out for signs of allergic reactions such as:

  • Rash
  • Itching
  • Swelling


Before taking this medication, tell your doctor or pharmacist if you have the following:

  • Allergy to sulfisoxazole or other sulfonamides
  • Impaired renal or hepatic function
  • Bronchial asthma
  • Glucose-6-phosphate dehydrogenase deficiency
  • Pregnancy or lactation