What supplements to take with antibiotics?

[Guest guest]

My son who has just started this diet because he can not absorb any

food has just gotten pneumonia again. He had it two months ago, was put

on antibiotics, and we started the diet shortly after that. He is so

thin 83 pounds and 5' 11 " , that whenever he gets a cold it just sits in

his lungs and turns to pneumonia. He has no muscles in his chest to

cough properly, and so it can not get out. I am really worried, he was

put on Zithromax this time, and I understand that is one of the

antibiotics that causes the bacteria to mutate and turn even worse. Can

anyone tell me what supplements to give while he is on these

antibiotics so I can prevent bad things happening in his gut? Any

advice would be appreciated, Thanks!