I covered some of it over in the thread "Do you feel like you're no longer yourself", but I'm happy to recount it here as well. I've fought with Tourettes syndrome and some associated anxiety and depression for most of my life, so I've been on one or two meds for that since my pre-teen years. For the most part, that was without issue and I always went to a neurologist for those meds, not a psychiatrist. I have nothing bad to say about any of my neurologists, I feel like they all knew what they were doing and I was well cared for.
Things really started to fall apart for me a little over a decade ago when I was in a serious car accident, which left me with a mild traumatic brain injury and PTSD. I complained to my neurologist that the meds for my anxiety and depression "just weren't working" for me any more, and that's when I had my first experience with a psychiatrist. I got put on and off of a lot of powerful meds in the first few years after the accident, including things like depakote, lithium, seroquel, benzos including lorazepam and valium. I was tried on mood stabilizers including lamictal and a number of antidepressants including wellbutrin, effexor, and luvox. I know I'm leaving things out. At one point I was on 7 or 8 meds at once. That's when I was pretty much sleeping all of the time.
Early on after the accident I was still "working" for a large software company, though I spent most of my time on disability leave, unable to code due to the effects of the meds. About 3 years out from the accident I found a more reasonable psychiatrist who realized that I was very much over-medicated and was able to pare down to just 3 meds (sertraline, topamax, and olanzapine). I did quite well on this combination for a handful of years. I had been laid off from my software job but started taking in freelance coding jobs. I was also teaching myself electrical engineering in my spare time, and working on some fulfilling projects in that domain. I felt like I was finally healing.
Then about two years ago, my pharmacy changed the brand/supplier of the sertraline I was getting, and I started getting violently angry about an hour after taking my dose. I had always struggled with my temper while on that med, but this was much worse than I was used to. My psychiatrist decided that I needed to be off of it ASAP, so we did the "prozac taper", by way of switching me to prozac because of its longer halflife, for about 4 days, then quitting that cold turkey. In hindsight, it was not a good decision with how long I had been on the sertraline for. In the following months I developed severe anxiety, panic, insomnia, and depression. I slowly lost my confidence in my ability to do the things I'd always done. My psychiatrist added a couple of new meds (doxepin and gabapentin) that got me sleeping again and got the panic under control, but since then, I've felt like a zombie. I'm depressed, anhedonic, foggy, and fatigued. All I do is sit around and browse the web. I don't have the executive function to solve problems or code like I used to, and I don't have the motivation or confidence to do other things I would like to like work on cars or projects around my house. I moved last year and most of my stuff is still in boxes, because I can't figure out how to unpack and arrange it in the new space.
I hope that gives you an idea of my journey. I definitely do NOT trust psychiatrists. I am currently seeing one, but it's one who listens to me and we're working on a plan to slowly taper me off of my current cocktail of meds. I still have to fight him from time to time whenever he suggests "maybe if we just try adding this med..." I had to go through a number of different ones after I moved before I found somebody who would work with me and listen to my input. I just hope I have the patience to see this through. I'm on 4 meds still, and tapering all of them properly could take a number of years.