Generic name: trimethoprim [ trye-METH-oh-prim ]
Brand names: Primsol, Trimpex, Proloprim
Dosage forms: oral solution (50 mg/5 mL); oral tablet (100 mg)
Drug class:Urinary anti-infectives
What is trimethoprim?
Trimethoprim is an antibiotic that is used to treat bladder or kidney infections, or ear infections caused by certain bacteria.
Trimethoprim may also be used for purposes not listed in this medication guide.
Warnings
You should not use trimethoprim if you have anemia caused by a folate (folic acid) deficiency.
Before taking this medicine
You should not use trimethoprim if you are allergic to it, or if you have:
anemia (low red blood cells) caused by a folate (folic acid) deficiency.
Trimethoprim is not approved for use by anyone younger than 2 months old. Trimethoprim should not be used to treat an ear infection in a child younger than 6 months old.
Tell your doctor if you have ever had:
a folate deficiency;
liver or kidney disease; or
a blood disorder.
Tell your doctor if you are pregnant. Trimethoprim can interfere with your body's ability to metabolize folic acid, a form of vitamin B important in the development of the unborn baby's brain and spinal cord.
It may not be safe to breastfeed while using this medicine. Ask your doctor about any risk.
How should I take trimethoprim?
Follow all directions on your prescription label and read all medication guides or instruction sheets. Use the medicine exactly as directed.
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