sulfamethoxazole and trimethoprim

How long does Sulfamethoxazole and Trimethoprim stay in your body?

The elimination half-life of sulfamethoxazole and trimethoprim is about 10 hours — the time it takes the body to clear about half of it. As a rule of thumb, a medicine is mostly gone after roughly 4 to 5 half-lives, though this varies from person to person with age and kidney or liver function. The FDA label states the mean serum half-life of sulfamethoxazole is 10 hours (co-formulated with trimethoprim, whose half-life is 8 to 10 hours). Half-life is prolonged in patients with severely impaired renal function, requiring dosage adjustment; the elderly, who often have reduced kidney function, may also clear it more slowly. Sulfamethoxazole is not a prodrug; it is partly metabolized to an inactive N-acetylated metabolite that does not outlast the parent. Half-life is not the same as a drug-test detection window — the drug can remain detectable longer than a single half-life implies.

This is general information, not medical advice. It doesn’t tell you when a drug test would read negative (tests detect substances for different, often longer, windows) or when it’s safe to take another dose — ask your pharmacist or prescriber. Source: DailyMed - Sulfamethoxazole and Trimethoprim Tablet (FDA label).

Frequently asked questions

How is Sulfamethoxazole and Trimethoprim rated?

pharmaranks gives Sulfamethoxazole and Trimethoprim a composite score of 3.6 out of 5, currently based on 1 weighted source (FDA regulatory recall-safety data weighted highest). See our methodology at /how-we-rate.

Is there a coupon or discount for Sulfamethoxazole and Trimethoprim?

pharmaranks is an independent ratings site, not a pharmacy — we don't issue coupons or sell Sulfamethoxazole and Trimethoprim. To pay less, Sulfamethoxazole and Trimethoprim is already a generic — usually the lowest-cost version — so the main levers are comparing cash prices between pharmacies and using a pharmacy discount-card service. Prices vary by pharmacy, insurance, and location, so always confirm at the counter. This is general reference, not medical or financial advice.

Who makes Sulfamethoxazole and Trimethoprim?

Sulfamethoxazole and Trimethoprim is marketed by Hikma. You can see Hikma's full profile, rating, and other products on pharmaranks.

Is Sulfamethoxazole and Trimethoprim a brand-name or generic drug?

Sulfamethoxazole and Trimethoprim is a generic medication; its active ingredient is Sulfamethoxazole and Trimethoprim. Generics contain the same active ingredient as the brand-name original and are usually lower cost.

Is Sulfamethoxazole and Trimethoprim available over the counter?

No. Sulfamethoxazole and Trimethoprim is a prescription (Rx) medication in the US — you need a prescription from a licensed clinician (in person or via telehealth); it isn't sold over the counter. For some conditions there are OTC alternatives — ask your pharmacist.

What forms does Sulfamethoxazole and Trimethoprim come in?

Sulfamethoxazole and Trimethoprim is currently marketed as injectable, suspension and tablet, per the FDA's National Drug Code Directory.

Is Sulfamethoxazole and Trimethoprim FDA-registered?

Sulfamethoxazole and Trimethoprim is on record with the U.S. FDA under application number ANDA070627. You can verify this on its official FDA label.

Has Sulfamethoxazole and Trimethoprim been recalled by the FDA?

Sulfamethoxazole and Trimethoprim has no FDA recalls recorded under its own application in the openFDA enforcement database. Its recall-safety score reflects its manufacturer's overall recall record. This is general reference, not medical advice — check the FDA recall database for the latest alerts.

Is Sulfamethoxazole and Trimethoprim safe?

There's no single safe-or-not verdict. pharmaranks gives Sulfamethoxazole and Trimethoprim a recall-safety score of 72/100, based on its FDA recall history (no recalls under its own FDA application) — not an efficacy or side-effect rating. Review its FDA-label side effects and warnings before use, and always consult a licensed professional.