Even if the disorder is from the environment, if a person waits too long to get help, they can end up needing medication due to complex PTSD. When I first went to a psychologist (about 8 years ago), I was extremely suicidal. I was prescribed Bupropion and Xanax (much more than I take now--he said I could take it every 4 hours if necessary and I was given four doses a day! Plus, I had no idea how addictive it was) and my suicidal thoughts stopped. I do wish I hadn't been prescribed the Xanax and another antidepressant might have worked better (the Bupropion made me more hyper and I was able to sleep much less on it--I needed the Xanax to come down from the Bupropion!). Also, I sometimes wonder if the meds change our brain chemistry to the point that we now need them permanently. When I stopped the Bupropion (I had lost my medical insurance) in 2015, it was one of many things that led to my attempt that put me in the hospital that year.