For his allergy problem he should take an antiallergen like loratadine/cetrizin. For breathing difficulty, he should take inhalers in the form of MDI or DPI. These inhaler medicines should preferrably be combinations of long acting beta agonists and long acting steroids like foracort or seroflo -2 puffs twice a day.You have mentioned about swelling around lips for which you should be careful because he can develop angioneurotic edema
which can become an emergency. Hence he should preferrably take a short course of oral steroids like prednisolone
30 to 40 mgm once a day for 5 to 7 days.
As far as his fatty liver
goes, he should follow life style modifications like avoiding high fat diet (oily, fried stuff), white flour and stuff made out of it, take plenty of fruits, vegetables and nuts, he should reduce weight if overweight
and do regular exercises like walking and jogging. If his liver function is also abnormal, he should consult a gastroenterologist