They will more than likely refer to you as "non-compliant" and they will try and take your children into states custody. They don't take to kindly to people that don't do things their way. TRUST ME! If you do tell them you are willing to sumit a urine screen and are clean they shouldnt bother you for too long,but if you try and get by with not taking them they will assume you have something to hide and come on to you 10xs harder than before. My advice, call them and apologize...say you were just scared of what was going on and that you are willing to comply to do whats best for your children. They will be much more easy on you over time. AND don't piss them off...they will come after you. They are control freaks that like to take kids for no reason. Some children need to be taken out of the home but most that are don't need to be, and the ones that do need it they never bother...somethings wrong with that.FOR REAL.
You have the right to refuse a drug test from the cops, however it is a guarantee that they will call the Judge and have a warrant issued immediately for a blood draw, in which you will be taken to the local hospital, unless clinicians are on staff at the jail that can draw blood. You will be forced to have a blood draw, same goes with refusing a Breathalyzer. You can always say no, but a judge can always say yes.