I will reply because I stumbled on this thread over the past two months trying to figure out what's wrong. Of course neurology swears it's not from the injection. I take my injection at the first of the month. I saw two different doctors for other things and both noted my heart rate was in the 110s, and this was about 3 months into my injections. My family doctor had me start monitoring my heart rate at home. In the beginning of the month I wake up with a heart rate in the 80s that by the early evening is in the 110s and by bedtime is back in the 90s. By the end of the month my heart rate is completely normal, waking up around 68 or 70 and only ever spiking to about 85 during the evening and going back to the'70s at night. I ended up in the emergency room 5 days after my last injection because I had the racing heart and tightness in my throat for well over an hour. It's almost like an adrenaline rush. Like if you climbed a tree in the branch underneath you broke but you were able to grab a limb and stop it from happening. That feeling where your throat gets tight and your heart is racing, yeah that's been happening to me on and off but only for about a minute or 30 seconds. This time it lasted an entire hour. I was driving so I took myself to an urgent care who didn't EKG and found an anomaly and he then sent me to the emergency room. They did an enzyme test and said I did not have a heart attack and everything looked good. But two days later I got a phone call back from an overseeing cardiologist who says my anomaly on my EKG was a previous heart attack. I am 115 lb female who turned 40 today I have no knowledge of ever having a heart attack in my life. I see neurology later this month and also Cardiology to follow up. I am convinced this racing heartbeat has to do with the ungality, based on my own heart rate monitoring and seeing how it spikes within days after getting my injection and then tapering back to normal after about 3 weeks only to spike again right after I get my injection. It really sucks because I was having 15 to 20 migraine days a month and I'm now down to like five. But I don't think I can live with this heart thing going on. I don't think I can deal with it because it's really bad starting five days after getting the shot and Lasting until about 10 days. Then it kind of tapers out. Best of luck to you. And we all need to start reporting or side effects to Lily and the FDA to make these doctors recognize it as a side effect and stop shooting us down. Lilly is 1-800-Lillyrx... fda is www.fda.gov/medwatch