Sulfatrim Dosage

The recommended Sulfatrim dosage will vary, based on factors such as your weight and height, the type of infection, other medical conditions you have, and other medications you are taking. Sulfatrim comes in the form of an oral suspension (liquid) and is approved for use in children as young as two months old. If you have kidney disease, you may need a lower dosage of Sulfatrim.

Sulfatrim Dosage: An Introduction

The dose of Sulfatrim® (sulfamethoxazole/trimethoprim) your healthcare provider recommends will vary, depending on a number of factors, including:
  • Your height and weight (for some uses)
  • The type of infection and bacteria
  • Other medical conditions you may have
  • Other medications you are currently taking.
As is always the case, do not adjust your dosage unless your healthcare provider specifically instructs you to do so.

Dosing for Adults

The recommended Sulfatrim dosing for adults with normal kidney function is as follows:
  • Urinary tract infection (UTI) treatment -- four teaspoonfuls (20 mL) every 12 hours for 10 to 14 days
  • Pneumocystis carinii pneumonia treatment -- dosage based on weight, taken every 6 hours for 14 to 21 days
  • Pneumocystis carinii pneumonia prevention -- four teaspoonfuls (20 mL) once daily
  • Shigellosis or traveler's diarrhea treatment -- four teaspoonfuls (20 mL) every 12 hours for 5 days
  • Acute worsening of chronic bronchitis treatment -- four teaspoonfuls (20 mL) every 12 hours for 14 days.
Lower Sulfatrim dosages may be recommended for people with kidney disease.

Dosing for Children

The recommended dose of Sulfatrim for treating urinary tract infections, ear infections, or Pneumocystis carinii pneumonia in children is based on weight. For Pneumocystis carinii pneumonia prevention, the dose is based on body surface area (which your child's healthcare provider will calculate using your child's weight and height). Sulfatrim should never be used in children under the age of two months old.
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