Hard to say without knowing more but if it's that severe, either mental health-wise or alcohol withdrawal-wise, then hospital is gonna be the safest bet.
I get why you don't want to do the hospital thing but if she's going through severe alcohol withdrawal then she risks seizures and in the worst case scenario even death. Alcohol and benzo withdrawal are the two withdrawals that are known to kill people. It ain't worth the risk. A hospital can manage the withdrawal and if shit goes sideways, being in hospital means they can respond immediately.
If she's not at the point of risking seizures or death from DTs but she's hallucinating for some other reasons then you're looking at the possibility of a psychotic break. And hospital is where a person needs to be in that situation so that the psychosis can be managed while mitigating the risk.
In all honesty though, it sounds like delirium tremens based off of your description. The mortality rate for untreated DTs is between 15-40% and those are not odds that anyone should gamble a life on.