Tizanidine is the generic form of the brand-name medication Zanaflex. It is a muscle relaxant used to treat muscle spasms and reduce pain by blocking pain signals from reaching the brain.

Founded in 2010, Ingenus Pharmaceuticals distributes about 37 drugs in the U.S. The number of manufacturing locations was not readily available, but at least some are located in the U.S., India, and Switzerland.