[thelettere]

Yes it does mention it - scholar gives you direct quotes in the subheading, which for this one is: "alter one type of pain (eg, Tylenol reduces physical pain) can alter the other as well (eg, Tylenol reduces social pain)."

I did a paper on this subject some years ago, so I know the info is legit. I didn't expend a ton of effort because information on human beings in hacker news is almost always shockingly lacking and so if I bother to write a high quality post it almost always gets either ignored or downvoted - because the "experts" here don't have the knowledge base to recognize what is true.

And as for scholar, if you type in the right terms, 99% of the time it gives good results. So in this case obviously "tylenol" is not a good search term because that's a brand name. What you want is the active ingredient, which in this case is Acetaminophen. If you type "Acetaminophen rejection" into scholar what are the results?

I just did and there's a wealth of highly cited studies backing up OP's claim, including the very first result.