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I was told it raises your heart rate. It goes away within a few minutes, my best friend's son has that happen to him too. I don't think I am allergic to it but thanks for the info! I have always had that reaction with it and I think it has something to do with being upside down when they give it as well. One time they had to give me juice to make me less shaky as it lasted more than a few minutes. I'm just sensitive to it I guess.
I've heard that the reason you get shaky is because they have adrenaline in the Novocaine to make it work faster. They're supposed to carry some without adrenaline for people who have a bad reaction to it. It takes longer for it to work though, so most dentists don't bother to offer it to you as they want you in and out as quickly as possible. Ask your dentist about it next time.
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