Question 1

Which urinary antispasmodics molecule has the most API manufacturers?

Accepted Answer

Solifenacin, with 36 manufacturers holding an active regulatory filing, of which 30 hold an active US DMF or a valid CEP. Counts come from the FDA drug master file list and the EDQM certificate database, as at 9 July 2026.

Question 2

How many API manufacturers cover the urinary antispasmodics class?

Accepted Answer

Across the 3 urinary antispasmodics molecules tracked here (ATC G04BD), 78 active filings are held by manufacturers worldwide. Some companies file for several molecules in the class, so the per-molecule pages name each holder.

Urinary antispasmodics: API manufacturers by molecule

Solifenacin API manufacturers

Mirabegron API manufacturers

Oxybutynin API manufacturers

Map any of these molecules

Other therapeutic classes