I get opoid pain medication from my primary care doctor but have also seen a pain management doctor in the past. I have signed an agreement about my med use as well. All my test show rapid destruction of spine and all agree I need the drugs. Today I was drug tested when I went to pick up my oxy RX. Since I couldn t produce urine they stuck a cotton stick under my tongue for five minutes. I have several autoimmune diseases as well and have dry mouth often. What are they looking for with this test? What could go wrong?. I am getting annoyed at being painted a bad guy because of this medication use. I suffered so much for years with no relief. I feel as if I am being victimized by all this.