Cotri DS Tablet 160mg/800mg

About Cotri DS Tablet 160mg/800mg

Cotri DS Tablet Uses

• Urinary tract infections including cystitis and pyelonephritis
• Acute exacerbations of chronic bronchitis
• Traveler's diarrhea caused by susceptible bacteria
• Ear infections such as acute otitis media in adults
• Pneumocystis jirovecii pneumonia, including prevention in high risk patients

Cotri DS Tablet Benefits

• Works against a broad range of gram positive and gram negative bacteria
• Combines two antibiotics that block bacterial growth at two separate steps
• Available as a low cost option compared to many newer antibiotics
• Twice daily dosing makes it easier to complete the full course

What Experts Say

Trimethoprim and sulfamethoxazole work together as a synergistic pair inside this tablet. Each drug blocks a separate step in the folic acid pathway that bacteria depend on for growth, so the combination stops bacterial multiplication more completely than either ingredient could achieve on its own. This dual action is part of why the pairing has stayed in use for decades.

Clinical guidelines still list this combination among first line options for uncomplicated urinary tract infections in regions where local resistance rates remain low. Doctors typically check local susceptibility patterns before prescribing it, since resistance to this combination varies widely between hospitals, clinics, and even between seasons in the same facility.

Decades of clinical use have built a strong safety record for this combination, though clinicians still watch closely for allergic skin reactions and changes in blood counts during longer courses of treatment. Regular lab monitoring is recommended for patients on extended therapy, older adults, and anyone with reduced kidney function.

Drug Class

• Sulfonamide antibiotic combination
• Folate synthesis inhibitor
• Dihydrofolate reductase inhibitor

Cotri DS Tablet 160mg/800mg formula

• Trimethoprim
• Sulfamethoxazole

Available forms

• Tablet

How to use Cotri DS Tablet 160mg/800mg?

• Cotri DS Tablet is usually taken twice a day, roughly twelve hours apart, unless a doctor advises a different schedule.
• The tablet works best when taken with a full glass of water and plenty of fluids throughout the day.
• The full course should be completed even if symptoms improve within a few days, since stopping early can allow the infection to return.
• Food does not need to be taken with this tablet, though it can be taken with a light meal if it causes stomach upset.
• Missed doses are best taken as soon as remembered, unless the next dose is already close, in which case the missed one is skipped.

Drug Interactions

• Warfarin: This tablet can raise warfarin levels in the blood and increase bleeding risk, so clotting tests need closer monitoring.
• Methotrexate: The combination increases methotrexate toxicity and the risk of bone marrow suppression.
• ACE Inhibitors and ARBs: Combined use can raise potassium levels, particularly in older adults and those with kidney disease.
• Phenytoin: This tablet can slow the breakdown of phenytoin and raise its blood levels.
• Diuretics: Thiazide diuretics taken alongside this tablet raise the risk of low platelet counts in older patients.

Risks and warnings

• Allergic Reactions: Sulfonamide antibiotics can trigger severe skin reactions such as Stevens Johnson syndrome, and any rash should be reported to a doctor right away.
• Blood Disorders: Long courses may lower blood cell counts, so periodic blood tests are advised for extended treatment.
• Kidney Function: Patients with reduced kidney function need a lower dose, since the drug is cleared through the kidneys.
• Pregnancy: This combination is generally avoided in the first trimester and near term due to risks to the developing baby.
• G6PD Deficiency: People with this enzyme deficiency face a higher risk of red blood cell breakdown while on this medicine.

Cotri DS Tablet Side Effects

Most people tolerate this tablet well, though some mild reactions can appear during treatment.

• Nausea and stomach upset
• Loss of appetite
• Headache
• Mild skin rash
• Diarrhea

A smaller number of patients experience reactions that need urgent medical attention.

• Severe skin peeling or blistering
• Yellowing of the skin or eyes
• Unusual bleeding or bruising
• Severe sore throat with fever
• Difficulty breathing or facial swelling

Storage Conditions

• Store at room temperature, between 15 and 30 degrees Celsius.
• Keep the strip away from direct sunlight and moisture.
• Keep the tablet out of reach of children.
• Discard any tablet past its printed expiry date.