my doctor prescribed Lisinopril 20mg I took it for the first time today my resting heart rate prior was 103-107 bpm. My thryroid isn t functioning properly its extremely low. I have candida as well, my throat has been swollen since I tried going back on my thyroid meds, I developed an allergic reaction. The Doctor has not prescribed a replacement for that yet. nor the antibiotics for candida which causes me massive stomach pain. my blood pressure was 145 over 112 prior to this new medicine but now my heart rate is 112 bpm after taking it. as well as my face and tongue going numb. I am afraid to take this medicine again tomorrow because I feel like I will have a heart attack if I do.