Stomach pain. ? is there a cure to this?

Respected Sir, My father is having stomach pain for the past 2 days. What ever little he is eating, he is throwing up right away. Although he is an active consumer of alcohol and bidi, this kind of situation was normal at least once in a month. But this time, he said he is not feeling well. Are there any easily digestible foods I should give him? Or any prescribed medicines that I should give him (although he rarely takes medicines)? Or should I go for a hospitalisation (it doesn't look that worse)?? He has no previous medical history of any operations or treatments. Once thing I am doubtful with him is that he never takes any cold foods or drinks, so his stomach is always burning. Is there a cure to this??? Thank you for taking the time to look after this report.