<s>[INST] Had blood pressure checked and doctor decided to prescribe lisinopril. This is the first time I ve had to use medication. Im an otherwise healthy 54 year old man. My type of hypertension is borderline as my BP has been normal as recently as one year ago. No other history of chest pains and I had an EKG last year during my annual physical that was normal. Not sure if I want to continue with the drug, took the first dosage last night before bed, I am physically active, working out 3 times plus per week. Do not have any pain or shortness of breath while excercising. Have a good diet. [/INST] Greetings. Welcome to Chat Doctor, and thank you for your question. I understand your concern. Lisinopril is a safe and effective Chat Doctor.  Normal blood pressure standardized worldwide is: systolic 100-139 mmHg and diastolic 60-89 mmHg. Figures higher than this, found on three consecutive measurements in both arms, in three different times of day, can be considered as hypertension. Although, this means cannot be precise, but a 24-hour blood pressure monitor is. You can discontinue the lisinopril, if you feel like you do not need it, but based on blood pressure figures. If you discontinue it, you should take the upper mentioned measures, to confirm or exclude the diagnosis of hypertension precisely. It is a good thing that you are physically active, but I would suggest you to engage in physical activity for 60 minutes a day, seven days a week, like walking, swimming, biking etc. Also, a diet low on salt. I hope I was helpful with my answer. Take care. Kind regards,  </s>