There may be other brand names for this medicine.
You should not use this medicine if you have had an allergic reaction to trimethoprim, sulfamethoxazole, or any sulfa drug. Do not use this medicine if you are pregnant or breast feeding. You should not use this medicine if you have anemia (a problem with your blood) caused by not having enough folic acid in your body. This medicine should not be given to infants under 2 months of age.