I Was Having Blood Pressure 180/120 Eight Months Back. I

I was having blood pressure 180/120 eight months back. I was advised by the doctor to start tazloc 80 in the morning after breakfast. My weight at that time was 120 kg. After starting tazloc 80, now my blood pressure reads as 120/70 and have lost 20 kgs of weight during these eight months and I am not feeling any disconfort. Should I continue taking tazloc 80 or reduce it to tazloc 40 or any other medicine. During these 8 months I started going morning walk for half an hour which I was not doing earlier. Please reply.
Thanks and regard, Arun Gupta age 58 years