could cyclobenzaprine hci cause a failed drug test?

My friend has been using cyclobenzaprine for two weeks now and he is very worried. Not just for hid injured leg, but also about the fact that cyclobenmzaprine might cause some serious almost addiction effects. Is that true? Could that drug cause a failed drug test? I am worried for him and I want to help him.

That drug is the last one I would use when it comes to the choosing a pain killer. I have used it for a month and doctor simply forgot to tell me that three weeks is the maximum period of usage. After that, only doctor may prolong the therapy. So, I had hallucinations, could not drive at all and had nausea too. I guess this would be enough for your friend to change the therapy.