Hi jimi - I commend you on your concern for your mother. It's always nice to see a patient that has family behind them advocating for the best care possible.
As Leon said, we can't give medical advice, but whatever your concerns are should certainly be taken up with her healthcare team. One of things I will say though is that COPD can bring with it much anxiety and panic due to the inability to catch ones breath. Very often a doctor will prescibe a drup similiar to Xanax to "take the edge off" and make the person feel more comfortable. I'm sure your main concern is making sure that your mom is as relaxed and untroubled as possible.
Most doctors are aware of concerns related to side effects of medications and are ususally willing to give you the pros and cons.
I wish you and your family the best in caring for your mom.
Regards,
Lyn (site moderator)