Hi Dr. My Dad Was Diagnose Last Week His Kidney

Hi Dr. my dad was diagnose last week his kidney has 2 stones 1cm each. but i cannot see the result only his dr. inform me about the stone. he is taking his medicine for urine and to remove his stone.

when he take a food he feels to vomit thats why somethimes even if he really want to eat he cannot continue eating his food.

can you please advise what to do to stop the vomiting.