High pulse bit. The medicines for now?

My father has been taking Stamlo beta for the last 2 years He has been taking zolam 0.25 for the last 10days, esmoprazole for gas for 10 days and antacid for 6 days. He visited the doctor recently for check up with USG wnl,fbs81, hb14.2 , lft wnl, ecg wnl reports.The reports were normal.The doctor checked the pressure with omron digital blood pressure machine and the result was 156/96.Though my father checked the pressure at home that day and it was 125/75. The doctor then discontinued Stamlo beta and prescribed two other medicines - Asomex 5 and Metocard xl 12.5 and told to take these with 1 hour interval.Today my father took these medicines but after some time his pulse rate continues to increase and reaches upto 100 till now.Though blood pressure is 132/77. What can be the reason for this high pulse rate?Is it a matter to be worried about? Should we discontinue the medicines for now? P.S. I have a blood pressure machine that gives almost accurate results that of mercury machine.