Bactrim is made up of sulfamethoxazole and trimethoprim. Both of these combinations are antibiotics that treat different kinds of bacterial infections.

Use this medication precisely as recommended by your physician. Follow the prescription of your doctor carefully. 

The medication dose your physician has given is based on your condition, other medications or food supplements you may take, and your reaction to treatment. To diminish your risks for adverse effects, don’t increase your dosage. Take it regularly, or take it as instructed by your physician. Adverse events may still happen even at usual prescription dosages. 

If your physician requests you to use this drug consistently, use it regularly to get the most benefits from it. To make you remember it better, take it at a fixed time every day. 

Your doctor may need to modify your dosages to ease your symptoms or if you develop adverse reactions. 

If you have any inquiries with regards to information, ask your physician or pharmacist.

Bactrim is used in the following conditions:

  • Bronchitis
  • Ear infections
  • Pneumocystis jiroveci pneumonia
  • Shigellosis
  • Traveler’s diarrhea
  • Urinary tract infections

This medicine may be recommended for different uses. Approach your physician or pharmacist for more information.

Do not use Bactrim in people with the following conditions:

  • Severe liver disease and kidney disease
  • Low platelets caused by using trimethoprim
  • Anemia caused by folic acid deficiency
  • Pregnant
  • Breastfeeding
  • Dofetilide

Bactrim may have the following side effects:

  • Severe stomach pain
  • Yellowing eyes or skin
  • Unusual joint pain
  • Irritation, bruising, or swelling around the IV needle
  • Worsening cough
  • Trouble breathing
  • Fever
  • Any skin rash
  • Seizure
  • Decreased or increased urination
  • High and low blood potassium
  • Low blood cell counts

Keep in mind that your physician has recommended this drug since he or she has known that the advantage to you is more noteworthy than the risk of adverse reactions. Many individuals utilizing this medicine don’t have serious side effects.  

A serious allergy to this medication is uncommon. In any case, seek emergency medical help if you see any manifestations of a serious allergic response, including a rash, tingling or swelling, particularly of the face or tongue or throat, dizziness, or difficulty in breathing. 

This is not a complete list of side effects. If you see other effects not recorded above, contact your physician or pharmacist.


Take extra caution in patients with the following medical conditions:

  • Hypersensitivity
  • Patients who have a history of drug-induced immunological thrombocytopenia due to trimethoprim and sulfonamide usage
  • Patients with documented megaloblastic anemia due to folate deficiency

Prior to taking this medicine, tell your physician or pharmacist if you are allergic to it, or if you have some other hypersensitivities. This drug may contain inert ingredients, which can cause unfavorable side effects or different issues. Talk with your pharmacist for more information.


Bactrim may interact with the following medicines:

  • Methotrexate
  • Phenytoin
  • Warfarin

Inform your physician about the drugs you take, including over-the-counter medications, prescribed drugs, supplements, and vitamins. 

This is not a complete list of drug interactions. Approach your physician or pharmacist for more details. 

The effects of certain medications can change if you consume different medications or herbal products simultaneously. This can build your risk for side effects or may cause your drugs not to work effectively. These interactions are conceivable, yet don’t generally happen. Your physician or pharmacist can prevent or oversee interactions by changing how you utilize your prescriptions or by close checking. 

While utilizing this drug, don’t start, stop, or change the dose of other medicines you are using without your physician’s advice. 

If an overdose is suspected, call your healthcare provider immediately.

Available Brands:

  • Bactrim DS
  • Septra
  • Septra DS

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