Suggest Treatment For Chronic Obstructive Pulmonary Disease

I am a 78 year old man, I have COPD, CHF and a multitude of other issues. I take up to 3 lasix daily and use lactolose and prune juice to regulate my bowels because I am on a 75mg Duragesic patch and supplement Oxycodone for pain from back surgery which cause severe constipation. I am in a wheelchair but able to ambulate to and from a sitting position. I am experiencing a number of new symptoms such as muscle weakness, hot forehead, overwhelming weakness to the point where I cannot get out of my chair, lethargy, and weight gain. My urine flow has greatly decreased even with the increased dosage of lasix. I have very hard stools which end up with severe diarhea. I am concerned about my electrolyte balance. Could any of my new symptoms be caused by and electrolyte balance? I am under the care of a cardiologists and multiple other specialist but haven t talked to them about these new symptoms.