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Sulfatrim DS (Trimethoprim / Sulfamethoxazole)

Prescription requiredOnly Available By Prescription
What is a Generic Drug?

A generic drug is a copy of the brand-name drug with the same dosage, safety, strength, quality, consumption method, performance, and intended use. Before generics become available on the market, the generic company must prove it has the same active ingredients as the brand-name drug and works in the same way and in the same amount of time in the body.

The only differences between generics and their brand-name counterparts is that generics are less expensive and may look slightly different (eg. different shape or color), as trademarks laws prevent a generic from looking exactly like the brand-name drug.

Generics are less expensive because generic manufacturers don't have to invest large sums of money to develop a drug. When the brand-name patent expires, generic companies can manufacture a copy of the brand-name and sell it at a substantial discount.


Sulfatrim DS (Double Strength) is a potent antibiotic combination medication that aims to combat many bacterial infections. This prescription drug effectively treats urinary tract infections, bronchitis, pneumonia, and gastrointestinal tract infections, among others. It operates by inhibiting the growth and spread of bacteria, ensuring effective management and resolution of infections. The 'DS' in its name signifies 'Double Strength,' indicating a higher dosage of the active ingredients than regular Sulfatrim, thus providing a more aggressive approach to combating severe bacterial infections.

Before you buy Sulfatrim DS, you must talk to your healthcare provider about potential side effects and affordability.

Buy Sulfatrim DS (Trimethoprim / Sulfamethoxazole) online from online Canadian Pharmacy |


It is crucial to consult a healthcare professional before beginning treatment with Sulfatrim DS. Sulfatrim DS dosage and duration of the therapy will depend on the severity of the infection and the patient's overall health condition. Sulfatrim DS is available in tablet form and should be taken orally with a full glass of water. Taking the medication with food or milk may help prevent stomach upset.


Sulfatrim DS tablet combines two active ingredients: sulfamethoxazole and trimethoprim.


Sulfatrim DS is not suitable for everyone. Individuals with a history of allergic reactions to sulfonamide drugs or trimethoprim should not use it.

Patients with severe kidney or liver disease, anemia caused by folic acid deficiency, or a history of low blood platelets caused by taking trimethoprim or sulfa drugs should avoid this medication.

Pregnant women, especially those near-term and breastfeeding mothers, should use Sulfatrim DS only if necessary and under the guidance of a healthcare provider due to the potential risk to the fetus or infant.


Sulfatrim DS may interact with several medications, including blood thinners (warfarin), certain diabetes medications (oral hypoglycemics), digoxin, phenytoin, and methotrexate. Such interactions can increase the risk of side effects or affect the efficacy of either drug.

It is also essential to avoid taking Sulfatrim DS with dofetilide, as this can cause serious heart problems. Consuming alcohol during the treatment can increase the risk of specific side effects, such as an upset stomach or dizziness. Inform your healthcare provider about all your medications, supplements, and herbs before starting treatment with Sulfatrim DS to prevent potential interactions.

Side Effects

While Sulfatrim DS is effective in treating bacterial infections, it may cause side effects in some individuals. Common side effects include:

  • Nausea
  • Vomiting
  • Diarrhea
  • Loss of appetite
  • Mild itching or rash

Frequently Asked Questions about Sulfatrim DS (Trimethoprim / Sulfamethoxazole)

What is Sulfatrim DS (Trimethoprim / Sulfamethoxazole)?

Sulfatrim DS is a combination antibiotic used to treat various types of bacterial infections. It contains two antibiotics: sulfamethoxazole and trimethoprim.

What conditions is Sulfatrim DS approved for?

Sulfatrim DS treats ear infections, urinary tract infections, bronchitis, traveler's diarrhea, shigellosis, and Pneumocystis jiroveci pneumonia. It may also be used for purposes not listed in the medication guide.

How does Sulfatrim DS work?

The two antibiotics in Sulfatrim DS work together to inhibit the growth of bacteria, thereby treating the infection.

How is Sulfatrim DS administered?

Sulfatrim DS is administered orally. The dosage and length of treatment are based on your medical condition and response to treatment.

What is the typical regimen of Sulfatrim DS?

The regimen varies depending on the type and severity of the infection. Always follow your healthcare provider's instructions.

What should I do if I miss a dose?

If you miss a dose, take it as soon as you remember. If it's near the time of your next dose, skip the missed dose and continue with your regular dosing schedule.

What may interact with Sulfatrim DS?

Sulfatrim DS can interact with several other medications, so it's important to tell your healthcare provider about all the medicines you're currently taking.

Can Sulfatrim DS be used for other purposes?

Yes, physicians may prescribe Sulfatrim DS for conditions other than those the FDA has approved.

Is Sulfatrim DS safe during pregnancy?

If you are pregnant or planning to become pregnant, you should inform your doctor, as the safety of Sulfatrim DS during pregnancy is not known.

IMPORTANT NOTE: The above information is intended to increase awareness of health information and does not suggest treatment or diagnosis. This information is not a substitute for individual medical attention and should not be construed to indicate that use of the drug is safe, appropriate, or effective for you. See your health care professional for medical advice and treatment.