Hi there ~Nikoran
is a medication that is used to treat high blood pressure
as a preventative measure against effects of hypertension
and cardiac ischemia
and sometimes arrhythmias of the heart. Since the kind of pain your mother is experiencing is similar to the cardiac pain experienced by many patients in my practice, it might be wise to get a cardiac profile done after consulting with a doctor, just to rule out any cardiac origin. If all is fine then we might be reassured about the seriousness of the pain. I hope this helps.
Take care and have a lovely day!