Hi, My Mother Had Undergone Chemotherapy Treatment Under The Advice

Hi, my mother had undergone chemotherapy treatment under the advice of dr. Senthil rajappa , for stage 4 cancer that affected the breast , lungs, liver and bones.
She is currently on hormone therapy for the last 5 months . She is now in Bangalore and is having cough and asthma kind of symptoms, and has nausea too at times. She can't walk for more than 5 mins after which she is breathless . Please Advise what I can give her for immediate relief as the cough is draining her out.