My Husband Had Major Brain Surgery For A 6m Acoustic

My husband had major brain surgery for a 6m acoustic neuroma. He survived but now has progressed from between 1 and a half to 2 bottles of wine a day to bourbon. in 10 days he drand 2 1 litre bottles of wild turkey and a 750 ml of other. He also consumed wine but tells people he is not drinking much. I am conceerned but he won't do anything to change. He also has eye pain in the dropped side of his face, and seems flat.