My Son Age 21 Was Infected Jaundice Last Month,his Bilrubin

My son age 21 was infected jaundice last month,his bilrubin was 5.6 ,direct bilrubin was 3 at that time ,it came to2and 1 after 4 weeks.when scanned hisleft liver lobe was smallin size,he is also suffering from gallbladder stone,Is there any medicine for gallbladder stone and what is the diet he should follow after his jaundice infection what is the normal level of bilrubin