my mother has dpld diseases. she is 54 years old. we found this diseases before 3 years.from the 3 years she is taking medrol 4 to 16 mg. deponds on her worsen. but she have lot of problem on her body.like head ache, bone pain breathing problem, throat pain,throat block,dry cough.we took ct scan.digital x ray.the doctors said the lung affected about 80%.we want she will be without pain.less suffering to her life. please suggest any pain killer or medicine to her . she is taking oxygen 6hours in home.