Bactrim DS Tablet

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What is Bactrim DS Tablet

Bactrim DS is a prescription medicine containing two active ingredients, Sulfamethoxazole and Trimethoprim. It is classified as an antibiotic known as Sulfonamides.

This medicine treats various bacterial diseases such as urinary tract infections, respiratory tract infections, and certain skin and intestinal infections. 

Additionally, it is used to prevent and treat a specific type of Pneumonia (Pneumocystis Jiroveci). 

This medicine only works for specific types of infection. It is ineffective against viral infections (such as flu).

Abbott Healthcare Pvt. Ltd. is a well-known pharmaceutical company that manufactures this medicine.

Bactrim DS Tablet Uses 

Bactrim DS Tablets are prescribed to treat certain infections caused by bacteria and Pneumocystis Jiroveci Pneumonia. 

Bacterial infections: Bactrim DS is an antibiotic helpful for bacterial infections of the lungs, throat, urinary tract, ear, and stomach. It treats infections by inhibiting bacterial growth. 

Pneumocystis Jiroveci Pneumonia (PJP): It is characterized by a sudden onset of fever, cough, difficulty breathing, dry cough with little or no mucus, and chest pain.

Bactrim targets the microorganism responsible for PJP, helping in the prevention and treatment of the condition.

How does Bactrim DS Tablet work

Bactrim DS contains the active ingredients, Sulfamethoxazole and Trimethoprim. 

Sulfamethoxazole stops the production of Dihydrofolic acid, which is responsible for bacterial growth. Trimethoprim inhibits the Folic acid synthesis pathway.

These components combine to target and inhibit enzymes responsible for bacterial replication. They help suppress bacterial growth and assist in eliminating the infection.

The dual-action mechanism of Bactrim allows it to combat a variety of bacterial pathogens effectively to. 

Following the prescribed instructions for using Bactrim is important to ensure its effectiveness.

Dosage of Bactrim DS

The dosage of Bactrim DS may vary based on factors such as the type and severity of the infection. 

The typical dosage of Bactrim is one tablet a day. However, this strength may be adjusted based on your health and individual response to the medicine.

It is important to adhere to the recommended dosage as prescribed by your healthcare provider.

How to take Bactrim DS

  • Take this medicine orally, as advised by your doctor 
  • You may take it with or without food. However, if it makes your stomach upset, take it with food or milk
  • Drink plenty of water while taking this medicine to stay hydrated
  • It is recommended to finish the full course of treatment, even if symptoms improve before finishing the medication
  • For optimal effectiveness of this antibiotic, it is recommended to take it at evenly spaced intervals
  • Take this medicine at the same time daily. This will help you remember

Missed dose

If you miss a dose, take it as soon as you remember. 

If it's almost time for the next dose, skip the missed dose and continue with the regular schedule. 

Do not double up on doses to make up for a missed one.


Taking more than the recommended dose of Bactrim DS can lead to dangerous effects. 

If you suspect an overdose, seek immediate medical assistance. 

The symptoms of an overdose may include vomiting, nausea, dizziness, confusion, and loss of consciousness. 

It is essential to adhere to the prescribed dosage to avoid potential risks associated with an overdose. 

Always consult a healthcare professional if you have concerns about your medication.

Bactrim DS Tablet side effects

Bactrim may cause certain side effects. However, you can avoid them if you follow your doctor's instructions.

Some side effects include:

  • Vomiting
  • Loss of appetite
  • Mild itching or rash
  • Nausea
  • Stomach pain
  • Unusual joint pain
  • Dry mouth
  • Increased or decreased urination

These are temporary side effects. Consult your doctor if they cause you discomfort.


Bactrim DS may interfere with specific diseases and medicines. Talk to your doctor to learn about all possible interactions.

Some common interaction of Bactrim DS include:

Drug Interaction

Disease Interaction

Food interactions



Processed foods

Azilsartan Medoxomil

Renal dysfunction

Soft drinks


Folate deficiency



Hematologic toxicity



Liver disease



Hypersensitivity reactions


Folic acid














When taking Bactrim DS; it is important to follow specific precautions to avoid any harm. Consult your doctor to know about all the potential warnings.

  • Inform your physician if you are allergic to sulfa medications, Trimethoprim, or if you have any other allergies
  • Be cautious of any inactive ingredients in this product that may cause allergic reactions or other concerns
  • Discuss your medical history with your doctor before taking Bactrim, especially if you have kidney disease, liver disease, or certain blood disorders 
  • Inform your doctor about any history of blood disorders caused by Trimethoprim or sulfa medications, a vitamin deficiency (folate or folic acid), severe allergies, Asthma, bone marrow suppression
  • This medicine may reduce the effectiveness of live bacterial vaccines, such as the typhoid vaccine. Inform your doctor before getting vaccinated or immunized
  • You might be more sensitive to the sun if you take this medicine. Don't stay out in the sun too long. Don't use tanning beds or sun lamps
  • If you have Diabetes, this product might change sugar levels in your blood. Get your blood sugar levels checked more often
  • The side effects of this medicine may be worse for older people, especially skin reactions, blood disorders, easy bleeding or bruising, and a high blood potassium level
  • People with AIDS may be more sensitive to this medicine's side effects, especially skin reactions, fever, and problems with the blood


Prevent the medicine from exposure to direct sunlight and moisture. Always keep it in its original packing at room temperature. 

Keep this medicine away from children and pets

Frequently Asked Questions

What does Bactrim treat?

Bactrim DS treats several bacterial infections, including urinary tract infections, middle ear infections (Otitis Medium), Bronchitis, Traveler's Diarrhea, and Shigellosis.

What class of antibiotic does Bactrim represent?

Bactrim contains two medications: Sulfamethoxazole and Trimethoprim. It belongs to the category of antibiotics known as Sulfonamides. 

Bactrim inhibits the growth of certain types of infection-causing bacteria.

Is Bactrim a steroid or antibiotic?

Bactrim belongs to a medicinal class called antibiotics. It contains the active ingredients, Sulfamethoxazole and Trimethoprim, which help kill bacteria. 

Why do you have to drink a lot of water with Bactrim?

It is essential to drink enough water with Bactrim to avoid dehydration and support kidney function. 

Some ingredients in Bactrim can crystallize in the kidneys, leading to the formation of kidney stones. Staying hydrated can help avoid this side effect.

Can I take Bactrim if I'm pregnant or breastfeeding?

If you are pregnant, intending to become pregnant, or breastfeeding, consult your healthcare provider, as they will evaluate the potential risks and benefits.

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