Will Tizanidine show up on a 12 panel drug screen? It was taken 6 days ago. 4mg.

Tizanidine should. not be tested as an illicit drug. It may interfere with conventional drug tests, though that is only anecdotal, i.e. hearsay and unproven. I would wait before I do a drug test to make sure there is absolutely no substance in your body that can potentially give you false positives.