Feel sick when I drink (even when not drunk)Watch
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Everyone has 2 copies of the ALDH2 gene that is responsible for producing the enzyme that decomposes alcohol, but some people have 1 defective copy, and some people have 2 defective copies.
People with 2 working copies can drink all day. People with 1 working copy can drink moderately, but will have mild flush reaction, and definitely can't drink as much as people with 2 working copies. People with 0 working copies will feel very uncomfortable after having just 1 or 2 drinks, due to acetaldehyde buildup. Usually they aren't drunk (because the actual amount of alcohol consumed is small).
Alcohol first gets converted into acetaldehyde by another enzyme (this most people don't have problem with), and then acetaldehyde gets converted into acetic acid (harmless) by ALDH2.
Acetaldehyde is toxic, and acetaldehyde build up is what's responsible for both flush reaction and nausea, etc.
Judging by your description, unless you are allergic to alcohol (which is totally different and much less common), you probably have 0 working copy of ALDH2.
Most Asians have 0 or 1 working copy, and most Caucasians have 2. Don't know about other races.
The last 2 times I've had alcohol I've felt like I was close to physically being sick. However what made it really weird was that I knew I was 100% sober. Not even the tiniest bit tipsy. It's annoying because I wanted to drink more but my body wasn't letting me. Any idea what this is? It's felt like this with different types of drinks
Inb4 "just half a bottle of vodka."
Ok I can drink a LOT (naturally I've always been like that). But I get this sick feeling with anything... beers/lagers/ciders, vodka, rum, whiskey, gin. It's nothing to do with being drunk as it comes after not a lot and i know i'm way better than most people with alcohol.
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This wouldn't look out of place if 'alcohol' and 'drink' was replaced with 'heroin' and 'shoot up'. Just stop drinking alcohol then FFS.
Heroin is illegal and incredibly harmful and addictive, even in small amounts.
Alcohol can be used responsibly and be very positive for the person.
I agree that he should stop drinking alcohol, at least for now, but maybe an investigation into why this is happening would be a good idea.