Question 1

Who makes trimethoprim + sulfamethoxazole?

Accepted Answer

Trimethoprim + Sulfamethoxazole is a fixed-dose combination of Trimethoprim and Sulfamethoxazole. There is no combination-level drug master file; it is sourced as a finished combination or built from its component APIs. Its component-API makers are listed below; each holds its own regulatory filing.

Question 2

Where do the APIs in trimethoprim + sulfamethoxazole come from?

Accepted Answer

Trimethoprim: 11 verified API manufacturers. Sulfamethoxazole: 7 verified API manufacturers. Each links to its own ranked supplier page.

Question 3

What strengths does trimethoprim + sulfamethoxazole come in?

Accepted Answer

Common marketed ratios include 400/80, 800/160, 200/40, 80/16, 40/40 (mg per component). Ratios come from the finished-product records as at 29 July 2026.

Trimethoprim + Sulfamethoxazole FDC suppliers and manufacturers

Component APIs — where each ingredient comes from

Trimethoprim API manufacturers

Sulfamethoxazole API manufacturers

Source this combination

Component molecule pages