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Are you Looking to Buy Bactrim DS (Sulfamethoxazole/Trimethoprim) from OnlineCanadianPharmacy.

We don't sell this brand-version medication.

( Affordable Generic Alternatives )

Buy Generic Sulfamethoxazole/Trimethoprim

Prescription Prescription Required
Formulation : Tablet
Drug Name Dosage Quantity Price Buy Now
Sulfamethoxazole/Trimethoprim 800/160mg 100 $52.57 Add To Cart
Dosage: 800/160mg
Quantity: 100
Price: $52.57


  • Combination of sulfamethoxazole and trimethoprim.
  • Treats various bacterial infections (middle ear, urine, respiratory, intestinal).
  • Prevents and treats a specific pneumonia type (pneumocystis).
  • Not suitable for children under 2 months due to serious side effect risk.
  • Effective only against certain infections, not viral (e.g., flu).
  • Avoid unnecessary or misuse to prevent decreased antibiotic effectiveness.

Dosage and administration

  • Take medication orally with a full glass of water as directed by your doctor.
  • If stomach upset occurs, take with food or milk.
  • Drink plenty of fluids to reduce the unlikely risk of kidney stones, unless advised otherwise by your doctor.
  • Dosage based on medical condition and treatment response.
  • Take antibiotic at evenly spaced times for best effect.
  • Take at the same time(s) every day to help remember.
  • Complete the full prescribed amount even if symptoms improve before completion.
  • Inform doctor if condition persists or worsens.

Side effects

  • Possible side effects include nausea, vomiting, diarrhea, loss of appetite.
  • Inform doctor/pharmacist if these effects persist or worsen.
  • Medication prescribed based on doctor’s judgment of benefit outweighing risks.
  • Report serious side effects promptly: muscle weakness, mental/mood changes, signs of kidney problems, extreme drowsiness, signs of low blood sugar.
  • Seek immediate medical help for very serious side effects: persistent headache, neck stiffness, seizures, slow/irregular heartbeat.
  • Rarely may cause severe intestinal condition (C. difficile); inform doctor if persistent diarrhea, abdominal pain, blood/mucus in stool.
  • Avoid anti-diarrhea or opioid products if experiencing symptoms.
  • Prolonged/repeated use may lead to oral thrush or new yeast infection; contact doctor if new symptoms arise.
  • Rare but serious side effects include allergic reactions, severe skin rash, blood disorders, liver damage, lung injury.
  • Seek immediate medical help for symptoms like sore throat, persistent cough, skin rash/blisters, severe itching/swelling, difficulty breathing, yellowing eyes/skin, unusual tiredness, dark urine.
  • Not an exhaustive list; contact doctor/pharmacist for other effects.


  • Inform doctor/pharmacist of sulfamethoxazole, trimethoprim, sulfa medication allergies, or any other allergies.
  • Disclose medical history, especially kidney/liver disease, blood disorders, history of trimethoprim or sulfa medication-induced blood disorders, vitamin deficiency, severe allergies, asthma, bone marrow suppression, G6PD deficiency, underactive thyroid, mineral imbalances.
  • This medication may affect live bacterial vaccines; inform healthcare professional before immunizations/vaccinations.
  • Inform surgeon/dentist of all products used before surgery.
  • May increase sensitivity to the sun; limit sun exposure, avoid tanning booths, use sunscreen and protective clothing; seek medical help for sunburn or skin issues
  • Check blood sugar regularly if diabetic; report low blood sugar symptoms to doctor.
  • Older adults more sensitive to side effects, especially skin reactions, blood disorders, bleeding/bruising, high potassium
  • AIDS patients may be more sensitive to side effects, including skin reactions, fever, blood disorders.
  • Inform doctor if pregnant or planning pregnancy; avoid becoming pregnant while using sulfamethoxazole/trimethoprim; discuss risks and benefits with doctor if pregnant.
  • Medication passes into breast milk; consult doctor before breastfeeding, especially for infants with certain conditions.


Additional information

Brand Name:

Bactrim DS

Scientific Name:


Other Names:

Sulf Trimethroprim



Quantities Available:




All product content included on is for information only. Please note that it is not a replacement for your individual professional medical care or advice. Always remember to speak with a qualified health professional before taking any prescription or non prescription medication.

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