Not an issue: Urine tests do not test for Flexeril (cyclobenzaprine hcl).
Answered 4/7/2016
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90 hours.: The drug has a half-life of 18 hours, which means it will probably stay active in your body for 90 hours. Therefore, it will show up on drug tests for 3.75 days after you have taken it, but this time period may vary by individual. If a person has a bad liver or a kidney problem, the drug may stay in their bodies longer.
Answered 3/27/2016
4k views
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