ZYFLO CR (zileuton) extended-release tablets, 600 mg, 120-count bottles, Rx only, Distributed by Chiesi USA, Inc., Cary, NC 27518, NDC 10122-902-12.
Failed Dissolution Specifications: Out of specification result for dissolution.
Nationwide in the USA.
https://www.accessdata.fda.gov/scripts/ires/index.cfm?Product=D-1341-2019