Hello thanks for asking from HCM for your health related queries I can understand your concern. You are suffering from Depression and Generalised anxiety disorder and are on Wellbutrin (Bupropion) and Concerta (Amphetamine drug). You have problems in falling asleep and this is further potentiating your anxiety. Most of sleep medicines are not working. You have been taking Hydrocodone for back problems. As per my opinion many other medicines like Quetiapine or Olanzapine can help you in falling asleep. These medicines in low doses help individuals to sleep. Xanax or many other sleep medicines are not working properly so as per my opinion benzodiazepines conventional sleep medicines would not work. Other drugs like Mirtazapine, Trazodon which are anti-depressants and these drugs can help to sleep you better. Discuss with your psychiatrist to substitute Wellbutrin with either of these anti-depressants and you will see improvement. You have taken hydrocodone also and this has caused dependence most probably. In such case medicines like Pregabalin, Gabapentin can also help. Both these medicines not only help to reduce the symptoms of mild withdrawal but also help in reducing anxiety and cause sleep. Please discuss with your psychiatrist for these drugs. Thanks, Take care