Arintrim: A Brand of Sulfamethoxazole and Trimethoprim (Co-Trimoxazole)

What it is

Arintrim is a brand of sulfamethoxazole and trimethoprim (also called co-trimoxazole). This is a combination antibiotic that contains a sulfonamide (sulfamethoxazole) and a trimethoprim, working together to kill susceptible bacteria. It belongs to a class of medicines called antibacterials.

What it's used for

Arintrim is used to treat infections that are proven or strongly suspected to be caused by bacteria that are sensitive to sulfamethoxazole and trimethoprim. These infections include urinary tract infections, shigellosis (a type of diarrheal infection), and acute otitis media (middle ear infection) in children. It is important to use this medicine only when prescribed by a doctor to reduce the risk of antibiotic resistance.

How it's taken

Arintrim tablets are taken by mouth. The typical dosing schedule is every 12 hours. For urinary tract infections in adults, the usual course is 10 to 14 days; for shigellosis, it is 5 days. Doses for children are based on body weight and must be determined by a doctor or pharmacist. This medicine should not be given to infants under 2 months of age.

Common side effects

The most common side effects of Arintrim include nausea, vomiting, loss of appetite, and skin rashes or hives. Rare but serious side effects have been reported, including severe allergic reactions like Stevens-Johnson syndrome, toxic epidermal necrolysis, liver damage, and blood disorders such as agranulocytosis and aplastic anemia. Seek immediate medical attention if you develop a severe rash, yellowing of the eyes, unusual bleeding, or signs of infection.

Important cautions

Do not use Arintrim if you are allergic to sulfonamides or trimethoprim, have a history of drug-induced immune thrombocytopenia, or have megaloblastic anemia caused by folate deficiency. It is also contraindicated in children under 2 months of age and patients with severe liver damage. Use during pregnancy may increase the risk of birth defects; if you are pregnant or become pregnant while taking this medicine, tell your doctor immediately. Always complete the full course as prescribed, even if you feel better, to prevent resistance.

Frequently asked questions