Is there any kind of an over the counter drug test that will indicate or ID the presence of zanaflex in urine? I am missing some pills from my bottle and I just picked up the script on April 1st. I do not believe the pharmacy made an error... I have reason to believe my teen daughter may have taken them and I want to drug test her to be certain... it worries me sick, and saddens me I am going to have to actually lock my neds up!