<s>[INST] have high blood pressure and take medication twice a day have not been feeling well so took my blood pressure and saw a huge change in my pulse which was at 108 and had not be excerising or any thing at the time why is my pulse suddenly going up when it normally sits at 80 [/INST] HelloYou need to check which antihypertensive medicine you are taking. If you are taking any Calcium channel blockers like Amlodipine then it could be the cause of your increased pulse rate.Kindly consult with your doctor for review of your bp medicines.Wish you good health </s>