I have a serious question as the situation is very concerning to me. I have been on pain management for several years now, being prescribed Oxycodone HCI 10mg 4x a day. I ve been dealing with legal matters that have been requiring me to do Hair Follicle testing. The first one they gave me came out negative. I didn t think much of it at first. But after a long hospital stay in which I was given Demerol, Dilaudid, Morhpine, Oxycodone, and Fentinyl, I was sure that my Hair Follicle 3 weeks later would provide a positive result. But my Hair Follicle came out NEGATIVE. The only medical condition that I have that I would think could possibly cause this is Type 1 Diabetes. But through all my research I have found nothing. How is it possible that my hair follicle came out negative, having been given such heavy narcotics?