Hi Salmaan, Tablet metacard or any tablet containing metoprolol can make one get this symptom of epigastric discomfort or dizziness. But now if your mother has stopped taking the tablet, she should not have this symptom continuously. So either it can be acid peptic disease which can be reduced with antacid treatment. But rather serious condition like myocardial infarction is also one of the reasons for such symptoms, especially when you say her symptoms exagerate while walking (exertion). Some local infection in the armpit or musculo-skeletal disturbance can be another reasons. But all these possibilities mean you must show her to good physician to get her evaluated. With such a high BP she needs alternative anti hypertensive medications, so please go and see a physician for both these reasons. All the best.