Concerned about my dads health?

My dad is in his early to mid 40's.

My dad drinks at least a half of case of coors light everyday. Dips about 5-10 cans a day. Eats health and then not healthy 50-50. He's a little over weight his stomach is a poking out a bit. But I'm really concerned because hes been having problems with swallowing food he says it gets stuck sometimes. He never goes to the doctor, dentist, etc. but he brushes his teeth daily and his hygiene is good. I mean he wouldnt know if he had cancer or root canal. How can I convice him to stop drugs and stuff that like.