Talk to General Physician on Blood Pressure Query

My mother is on covam tab once a day since February. Previously her blood pressure was very random sometimes it was normal while the other time it was high like 130/90 140/90 140/100 etc. Now in Feb her bp was high for like a week and then she consulted a general physician and started her medicine since then. Now while she is on her medicine her bp maintained to 110/70 or so in like two months and then our apparatus stopped working, now we got another one and I'm checking her bp since three days on the same timings once a day, which is 90/60 100/70 please tell me what to do. Should she stop taking her medicine? She has no other problem Alhamdulilah