A 35-year-old member asked:
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i have not took flexeril (cyclobenzaprine hcl) in four days will it show up in a drug test?

1 doctor answer
Dr. Robert Olsen
50 years experience Psychiatry
Possibly: The rate of drug elimination from the body is called the half life; it is the time for half of the dosage to be eliminated. After two half lives, only 1/4 of the amount will be present. The half life of cyclobenzaprine ranges fro 8 to 37 hours, and is affected by many other medications however, cyclobenzaprine is not a drug of common abuse, and would not likely show up n a drug abuse screen.
Answered on Dec 13, 2015
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