That depends on the test.
Cyclobenzaprine (Flexeril) has some potential for abuse but I don't believe this is common. Use as a treatment for fibromyalgia is "off-label". Legitimately, it's a muscle relaxant, approved by the US FDA, to treat skeletal muscle spasms, for which there are several possible causes.
Important:
We hope you find this general health information helpful. Please note however, that this Q&A is meant to support not replace the professional medical advice you receive from your doctor. No information in the Answers above is intended to diagnose or treat any condition. The views expressed in the Answers above belong to the individuals who posted them and do not necessarily reflect the views of Remedy Health Media. Remedy Health Media does not review or edit content posted by our community members, but reserves the right to remove any material it deems inappropriate.