Sulfa/TMP 800mg/160mg
Generic For: Bactrim DS
Sulfa/TMP 800mg/160mg (Bactrim DS) is a combination antibiotic containing sulfamethoxazole and trimethoprim. It is used to treat bacterial infections such as urinary tract infections, acute exacerbations of chronic bronchitis, and traveler's diarrhea. After a licensed provider reviews your prescription, your order ships from a licensed U.S. pharmacy.
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Buy Sulfa/TMP 800mg/160mg (Bactrim DS) Online
A sulfonamide antibiotic combination for urinary tract infections, bronchitis, and traveler's diarrhea
Sulfa/TMP 800mg/160mg Quick Facts
| Drug class | Sulfonamide antibiotic combination |
|---|---|
| Treats | Urinary tract infections, bronchitis exacerbations, traveler's diarrhea, shigellosis |
| Form | Tablet |
| Typical dosing | Take 1 tablet by mouth twice a day for 7 days. |
| Prescription required | Yes — prescription only |
What Is Sulfa/TMP 800mg/160mg?
Sulfa/TMP is a combination antibiotic that contains two medicines: sulfamethoxazole (800mg) and trimethoprim (160mg). Sold under the brand name Bactrim DS, it works by blocking two sequential steps bacteria need to make folic acid, which stops bacterial growth. It is prescribed for a range of bacterial infections, including urinary tract infections and certain respiratory and intestinal infections. Like all antibiotics, it treats bacterial infections only and is not effective against viruses such as colds or flu.
What Does Sulfa/TMP 800mg/160mg Treat?
Urinary tract infections (UTIs)
Acute exacerbations of chronic bronchitis
Acute otitis media (middle ear infection)
Traveler's diarrhea
Shigellosis (Shigella enteritis)
Pneumocystis jirovecii pneumonia (treatment and prevention)
Sulfa/TMP 800mg/160mg Dosage
UTI: 1 tablet by mouth every 12 hours for 10–14 days
Acute exacerbation of chronic bronchitis: 1 tablet by mouth every 12 hours for 14 days
Traveler's diarrhea or shigellosis: 1 tablet by mouth every 12 hours for 5 days
Your prescriber will determine the dose and duration that are right for you. Always follow the directions on your prescription label.
Sulfa/TMP 800mg/160mg Side Effects
Common side effects
- Nausea
- Vomiting
- Loss of appetite
- Skin rash
- Itching
- Headache
- Dizziness
Serious side effects
Stop taking this medication and seek medical attention right away if you experience:
- Severe skin reactions (Stevens-Johnson syndrome, toxic epidermal necrolysis)
- Signs of allergic reaction (swelling, difficulty breathing, hives)
- Unusual bleeding or bruising, or signs of low blood counts
- Severe or persistent diarrhea (possible C. difficile infection)
- Yellowing of skin or eyes (liver problems)
- High potassium levels (irregular heartbeat, muscle weakness)
Warnings & Interactions
Do not use if allergic to sulfa drugs or trimethoprim
Contraindicated in pregnancy near term and in nursing mothers of infants under 2 months
Avoid with significant liver disease or severe kidney impairment
Can increase bleeding risk with warfarin — close monitoring required
May raise potassium, especially with ACE inhibitors, ARBs, or spironolactone
Use caution in patients with folate deficiency or G6PD deficiency
Stay well hydrated to reduce the risk of crystals in the urine
Tell your prescriber about all medications, supplements, and health conditions before starting sulfa/tmp 800mg/160mg.
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