Olsalazine affects substances in the body that cause inflammation, tissue damage, and diarrhea.

Olsalazine is used to treat ulcerative colitis.

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

You should not use this medication if you are allergic to olsalazine or to salicylates such as aspirin, Novasal, Doan's Extra Strength, Salflex, Tricosal, and others.

Before taking olsalazine, tell your doctor if you have asthma or other allergies, kidney disease, or liver disease.

Call your doctor at once if your colitis symptoms get worse, or if you have chest pain, shortness of breath, fast or pounding heartbeats, nausea, stomach pain, loss of appetite, itching, dark urine, clay-colored stools, jaundice (yellowing of the skin or eyes).

You should not use this medication if you are allergic to olsalazine or to salicylates such as aspirin, Novasal, Doan's Extra Strength, Salflex, Tricosal, and others.

Before taking olsalazine, tell your doctor if you are allergic to any drugs, or if you have:

• asthma or other allergies;

• kidney disease; or

• liver disease.

If you have any of these conditions, you may need a dose adjustment or special tests to safely take olsalazine.

FDA pregnancy category C. This medication may be harmful to an unborn baby. Tell your doctor if you are pregnant or plan to become pregnant during treatment.

Olsalazine can pass into breast milk and may harm a nursing baby. Do not use this medication without telling your doctor if you are breast-feeding a baby.