We went through the same thing with my aunt. She was on 24 different medications. When she started throwing up non-stop we took her to the doctor and to the hospital. They could find nothing wrong. Released her and we took her home. We took her off her meds and within 6 hours she was no longer throwing up. The medication level had reached toxic levels in her system. After that, if a medication was prescribed we would ask what it was for and why she needed it. She lived another 10 years in relatively good health and wasn’t really sick much after that.
I’m convinced all those meds are doing her more harm than good.