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fishywiki t1_ivxhbo6 wrote

When I first started donating in College, many moons ago, it was normal to be given a Guinness afterwards. I never heard of that causing any negative episodes, although I suppose it's possible. It sounds like you had plenty to eat and had only a single beer, so I suspect this is a good example of conflating correlation with causation.

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FloridaMomm t1_ivxtrm7 wrote

Wrong wrong wrongity wrong. This is not an issue of correlation and causation being confused, it’s well established scientific fact that drinking after blood donation changes your tolerance to alcohol. For one thing you have less blood to dilute the alcohol in your system, so BAC gets higher than it normally would from the same drink. The other problem is that blood donation increases the risk of dehydration, which can lead to passing out (or a massive hangover if you drink)

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I_love_misery t1_ivy29fj wrote

Last sentence I have definitely experienced first hand. I donated blood then went walking to the store on a hot day (about 1 mile round trip) and almost passed out. So yeah don’t do anything that increases the dehydration after blood donation.

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