I have been taking some meds for pain in my back and neck because of a car accident. In the process i have put on some weight because of different drugs and lack of activities. I have been suffering depression which i feel is part of the weight gain . I don't sleep well and have been prescribed this drug for both. I just have a fear of weight gain, i cant put on more weight because its making me stressed out. Please let me know any weight side effects ??? I am prescribed 50-100mg at night