Thanks for posting your query.
Kivipride may cause frequent bowel movements but never cause difficulty in swallowing, nausea
You mother may have acute gastroenteritis
as her symptoms suggest.
Does she has spasmodic abdominal pain/ fever/ loss of appetite?
You should consult with physician and gastro-physician.
You should go for endoscopy
and stool examination, complete blood count
If all investigations are normal then you should go complete antibiotic course.
Get well soon,
Dr. Mayank Bhargava