<s>[INST] My mother was in the hospital for a couple of days with trouble breathing. She has been home a week now and has been using oxygen while she waits to have a copd test. She seems fine other than she is really weak. What could be causing this extreme weakness [/INST] thanks for your question I completely understand your question COPD is a disease of lungs with many extrapulmonary manifestations like muscle weakness , cardiac disorders, anxiety , osteoporosis etcgereralised weakness can be due ti copd as well as other secondary infection caused in a copd patients which leads to exacerbation.you need to give her a protein rich diet and treating physician will prescribe some inhaled bronchodilators and antibiotics needed.thanks/ regardsfeel free to ask more questionsmay god bless your family with good health </s>