Yes its a muscle relaxer and if they use urine or mouth swaps barbiturates ar 1 of th 15 major markers on fast techs.....the test has 8 10 13 15 and most all well 3 out 4 have it so depends on that but we have 3 were I work an lowest is 10 markers and in that 1 to the 8 marker dosent but that is used at half way houses an job testing there super cheep and most state drug testing we do is 13 markers and 93% for mouth swabs an (^ fior urine so you need to use 4 days an detox good luck...ps if you r healthy drink lots of good fluids water and Gatorade stuff like that if uused it only 1 or 2 times you might get away with 24hoyrs but I wouildnt bet freedom on it...1 or 2 baby asprin to in am and lots fliuds over the day never all at 1 time