Hey there Charlie   I began to research your question and right away I was finding people talking about a link between the Trazadone and hair loss.  Sometimes the hair loss did not stop even after stopping the medication.  Here is one forum where people discuss this side effect.   I would not be surprised if your weight gain is the result of one of these meds as well.    I think the best thing for you to do is to take these concerns to your doctor and pronto.  You may have to decide if these side effects are worth the gains from the meds.   Let us know what the doctor tells you.  And thank you for your question.