Hi, I recently failed a drug test for amphedimines. I do not do any drugs, I just take what is prescribed to me. Can you tell me what medications of mine may have caused this. I take Xanax, Seroquel, Norco, Trazadone, Estrogen, Pregabalin, Levothyroxine, Ranitidine, and Meloxicam. Please help me, I can't get any answers from my doctor now because I am labeled as a drug user.