Ibizan is right. when my dad drink he would drink his self in to a state were he would not eat he would go days and days without eating only drinking liquor. My mom after a few weeks would have to take him to a detox unit at a hospital when this happened and it happened quit a few times so get him to a detox take the pill bottle with you so they will no what he has been taking. Good luck.
Ur dad is playing w/his life mixing alcohol and opiate painkillers.He could very easily go in2 cardiac arrest.Vitamins will not help him.......he needs a medically monitored inpatient detox and treatment for his drinking and painkiller abuse.