How Long Does Flexeril Stay In Your System Via A Urine Test?

The number of days Flexeril stays in your system is dependent on your body metabolism and the amount of medicine you took. However, it can stay in your system from 6-7 days. And can be detected via a urinalysis.

Karen Lee Richards

Yes, Flexeril will show up in a drug screening.



How long a drug stays in your blood and/or urine is usually determined by its half-life.  The half-life of a drug is the time it takes your body to metabolize and excrete the medication so that half of it is removed from your body.  Generally speaking, it takes five half-lives to fully eliminate a drug from your blood or urine.  Flexeril has a half-life of 18 hours, so it would take 3.75 days for it to clear out of your body completely.



Keep in mind that half-life can vary from patient to patient, so this is not a hard and fast rule.  Half-life is also affected if the patient has altered kidney or liver function.

Flexible Will Stay In Your System For 2-4 weeks I work at the doctors office