Hello. I am a 49 y.o. female. My neurologist started me on Nortriptyline 25mg., 2 tabs daily for migraines/daily headaches. I was unable to tolerate 50mg. so I have been taking 25mg. daily x 2 &1/2 months. I have noticed a rapid heart rate (high 90 s). My heart feels like it s always racing . Also, the last few days, I decided to check my Blood pressure and my usual B/P is in the 120 s/70 s. The last few days, my B/P is high 130 s/88-90. No other symptoms. I generally don t check B/P but wanted to check it since my heart has been racing. Could this possibly be caused by the Nortriptyline? Thank you.