My Father Is 55 Years Old.He Has Extreme Backache And

My father is 55 years old.He has extreme backache and had been advised to take tablet for osteoporosis since last September.Last day he got admitted in hospital for left kidney hydronephrosis and kidney stone was flushed.He was told to take Angiotensin,Cyclopam,Syp.Cital and Nexpro.Also to monitor his Calcium levels alternatively.What type of food should he take?He has extreme bad ache too,what about that also?