My father is in hospice care for heart failure and stage 5 kidney failure. if we stopped his anti rejection pill for liver transplant - the only medicine he takes- what would exactly would happen and in what time frame? its been 4 months on hospice?

Stopping the anit-rejection medications can lead to acute rejection, chronic transplant damage and ultimately the failure of a transplant. The liver would fail. Liver failure has symptoms of yellowing of your skin and eyeballs, pain in your upper right abdomen, a swollen belly, nausea, vomiting, general sense of feeling unwell, confusion and sleepiness. It is uncertain how long that will take.

The best to weigh in and by having access to details of his case will be the transplant team, his current prescribers. However, if increasing difficulties swallowing with risk for aspiration, treatment should be stopped regardless of consequences, symptoms will be addressed with the help of the hospice team.