Question 1

Who makes isoniazid + rifampin?

Accepted Answer

Isoniazid + Rifampin is a fixed-dose combination of Isoniazid and Rifampin. 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 isoniazid + rifampin come from?

Accepted Answer

Isoniazid: 6 verified API manufacturers. Rifampin: 6 verified API manufacturers. Each links to its own ranked supplier page.

Question 3

What strengths does isoniazid + rifampin come in?

Accepted Answer

Common marketed ratios include 150/150, 150/300 (mg per component). Ratios come from the finished-product records as at 29 July 2026.

Isoniazid + Rifampin FDC suppliers and manufacturers

Component APIs — where each ingredient comes from

Isoniazid API manufacturers

Rifampin API manufacturers

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Component molecule pages