From my observation... for many it's just more and more meds are thrown at the mess. I have theory that your brain tries to adjust to its "normal" so one gets used to meds.... so up and up the dosages go and more meds roll on. Some cause more problems. So more meds come. Hard to get off, because withdrawal is very long. You need to ajdust back to being free of the mind altering substance. Many are not able to do it, for many reasons, so they are stuck with meds that are not working so great anymore and need something more....

Just my view though.