Prednisolone contains lactose, you have been told by your doctor that you have an intolerance to some sugars, contact them before taking this medicine.
There are no interactions between Doxycycline or Amoxicillin and food though it is recommended you avoid alcohol.
It also goes without saying that smoking should be completely avoided if you have COPD.
We advise that you consult with either your doctor or prescriber before you buy a COPD rescue pack.