This is sort of incomplete information.
Is your mother diabetic? Or has blood pressure issues? Or any other health issues?
Is the pain continuous or appears on its own? Is there any night pain?
Was an x-ray taken? If not, one needs to be taken
Meanwhile, if the medicines are giving relief, please continue with those
Next Steps
Continue with medicines and then get the tooth removed
Visit a dentist if the pain or discomfort worsens