I have never had that cigarette rush, heart palpitations, sweats, and that rush feeling, with any pipe tobacco. However, when I smoke a twist at night or large bowl of Dark Flake, I get a slowed heart rate, queasy stomach, a dizziness like I would get from a sleeping pill that I was forcing myself to stay awake on. I will just take a small bite of chocolate and a big glass of ice water and then crawl into bed. Then I sleep like a baby. This has been my routine since I have discovered pipes. The water ensures that I get up to pee in the morning, so that I don't oversleep, and it keeps me hydrated, offsetting any possible heart conditions (according to my doctor), and the chocolate just offsets any uncomfortableness with the nicotine. But, I used to have a big problem with insomnia. I have gone as long as five days without sleep in the past, just working around the clock at my workbench or strings of marathon book reading. I've always had a problem with this. In school, I used to have stacks of books all over my room where I had read a book every night and then went off to school. Then, when I would get to sleep, it was never good sleep. Then I took about every sleeping aid known to mankind. Some would make me sleep walk or sleep eat, and some just didn't work. But, since smoking strong blends before bed, I haven't had an issue at all. I get about 5 or 6 uninterrupted hours of sleep a night.
My Grandfather used to have this problem too. He built wooden boats as a hobby, and he would stay up all night every night and build some of the most exotic wooden motorboats, and then shower and go to his engineering job. Everyone kept telling him that it would decrease his lifespan, but he lived to be 92. I think he stayed alive just to spite everyone, ha ha.