Thanks for the query to H.C.M. Forum.
If I were your treating doctor for this underweight
and cough I would come up these measures , includes as.
1 First of all get rid of smoking
as you are already having smokers cough . May be this cough due to tuberculosis
. As you are having cough from month, with loss of weight loss
5 kg . Diagnosis can be confirmed by X ray
chest . If no tuberculosis then get rid of cough.
2 I advise you take appetizer stimulant as buclizine
hydrochloride syrup as well as tablets for at least one month.
3 As you are complaining that there develops acidity in stomach . Try raising the head of bed 4 inches with blocks. It also might help to avoid eating or drinking for 2 hours before you lie down .To help control the stomach acid,one should not drinks with caffeine in them or spicy food or greasy food.
Presumed that your cough is under control take 3500 calories in food .
Protein 5-6 calories /gm, fat 9 calories/ gm carbohydrate
If you take ghee 100 gm i.e. 900 calories .
For digestion you have to work very hard ( physical work )
Active exercise is necessary for you if you want to gain weight .
Good luck. Dr. HET