It's not that common, but it has long been known that a small number of people faint after an injection. It is a panic reaction. Your blood pressure goes up out of fear, and then it drops afterwards, leading to a faint.
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Medical assistant here. I’ve given hundreds of vaccines (Covid and others) and drawn blood on hundreds of patients. Can confirm—It just happens sometimes—especially if the patient hasn’t eaten recently and/or is dehydrated
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I'm that patient during at every blood draw, it's very unpleasant!
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Fear of needles is real. I have a 6' tall, perfectly healthy son that I have told never to give blood for this reason. I don't want some poor phlebotomist to have to deal with him freaking out. (I give blood all the time.)
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This training presentation doesn’t give precise rates for syncope but notes that it’s common but so is anxiety (may be linked). I’m highly likely to experience syncope during blood draws but not for intramuscular injections. I don’t know that it’s fear per se.
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I’m most anxious about potential sycope. With blood draws it seems partly due to the sensations. A cold needle makes it more likely as does them having trouble hitting the vein. Talking about it makes it more likely. I also have sycope with certain pain experiences but not all.
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Indeed. Even my youngster witnessed several of her peers fainting during a round of HPV vaccinations at school. It's as though Ms Wolf has no idea what she's talking about...
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