My Mom's dementia seems much better since she was put on breathing treatments and allergy pills. Anyone else experience this?

My mother age 90 seems much more peaceful and content after her breathing treatments and being put on an allergy tablet. Huge difference! She was remembering things that happened days before and hours before. It was like she was a complete nice person. She only hurt my feelings once on our last visit. She can lash out like a snake but this time I could tell she had an attitude of gratitude for once. She seemed to always be so self absorbed but this time it was very different. I was very sad to leave. Love this change and hope it lasts. Anyone else have this experience?