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Acetaminophen Reduces Both Pain and Pleasure, Study Finds

An anonymous reader writes: Researchers studying the commonly used pain reliever acetaminophen found it has a previously unknown side effect: It blunts positive emotions (abstract). Acetaminophen, the main ingredient in the over-the-counter pain reliever Tylenol, has been in use for more than 70 years in the United States, but this is the first time that this side effect has been documented.

38 of 187 comments (clear)

  1. Headache by irrational_design · · Score: 5, Funny

    There is surely a joke about "Not tonight dear, I have a headache" here somewhere.

    1. Re:Headache by JanneM · · Score: 4, Funny

      "Not tonight dear, I don't have a headache"?

      --
      Trust the Computer. The Computer is your friend.
    2. Re:Headache by kuzb · · Score: 5, Funny

      The most common problem here is that men open with the wrong question.

      "Would you like some Aspirin, dear?"

      "No, I don't have a headache"

      "Eeeexcellent"

      --
      BeauHD. Worst editor since kdawson.
    3. Re:Headache by davester666 · · Score: 3, Funny

      or rather "Not tonight dear, I had a headache"

      --
      Sleep your way to a whiter smile...date a dentist!
    4. Re:Headache by Njorthbiatr · · Score: 2

      Orgasms are, at least. So long as it's not an orgasm induced headache.

      In my opinion, copious amounts of caffeine and aspirin are better for treating headaches.

  2. Tradeoffs by Tablizer · · Score: 5, Interesting

    Perhaps this is why they are sold over the counter. If they didn't also deaden pleasure, they may otherwise be too addictive to be allowed over the counter. To be non-addictive, they may have to reduce pleasure to compensate for reduced pain. They could be (relatively) non-addictive because the overall affect averages out to neutral feelings so that a "pill=good" feedback cycle is not produced in the brain.

    1. Re:Tradeoffs by rtb61 · · Score: 4, Interesting

      Yep, because feeling good via any other means than mass consumption is bad. Although the principles mass consumption are very bad psychologically and do drive a need for feel better drugs. Mass consumption is also very bad for the environment, so what exactly are we doing by favouring it of simpler less environmentally taxing feel good methods, especially when the need for the feel good methods is driven by the feel bad nature of mass consumption ie you are not consuming enough so the engines of mass consumption purposefully sets out to make you feel bad in you failure to consume, which you can only alleviate via consuming more and more and more. The feedback cycle on mass consumption seems to be far worse all around, individually and environmentally.

      --
      Chaos - everything, everywhere, everywhen
    2. Re:Tradeoffs by rahvin112 · · Score: 3, Insightful

      Why do you believe it is the job of government to regulate pleasure inducing substances?

    3. Re:Tradeoffs by Shakrai · · Score: 3, Insightful

      Within reasonable (cannabis, alcohol, tobacco, caffeine, peyote) limits I don't view it as the job of the Government to regulate pleasure inducing substances. If you want to talk about the extremes (heroin and other opiates, cocaine, barbiturates), then yes, I think the use thereof should be regulated.

      --
      I want peace on earth and goodwill toward man.
      We are the United States Government! We don't do that sort of thing.
    4. Re:Tradeoffs by TheReaperD · · Score: 2

      Regulated, sure, but, banned seems to be doing more harm than good. Not saying they're good things, they're not but, banning them is just making criminals rich and powerful rather than keeping them off the streets. Not a good policy in my book.

      --
      "Be particularly skeptical when presented with evidence confirming what you already believe." -
    5. Re:Tradeoffs by whoever57 · · Score: 4, Funny

      That should be the next 'go back in time' movie, send the Puritans to colonize Krakatoa and let the good-timing criminals colonize America

      We know where that leads: Australia.

      --
      The real "Libtards" are the Libertarians!
    6. Re:Tradeoffs by CrimsonAvenger · · Score: 2

      Within reasonable (cannabis, alcohol, tobacco, caffeine, peyote) limits I don't view it as the job of the Government to regulate pleasure inducing substances. If you want to talk about the extremes (heroin and other opiates, cocaine, barbiturates), then yes, I think the use thereof should be regulated.

      It should, perhaps, be noted that what is defined as "extreme" depends largely on personal opinion.

      If you give the government the power to regulate something, THEY define what is extreme. And the next Congress gets to redefine "extreme" to suit them, ad infinitum....

      --

      "I do not agree with what you say, but I will defend to the death your right to say it"
    7. Re:Tradeoffs by TheCarp · · Score: 3, Interesting

      Funny, as a pot smoker myself, who would love to see the terrible jobs program known as our drug war ended, I actually think its MORE important to legalize the harder drugs, even though they have a lot less users.

      Fact is, drug laws have not been found even marginally effective at their intended purpose. Addiction rates do NOT go down as a result of them. In fact, about the only things drug laws have accomplished are filling prisons and creating law enforcement jobs. They also did a pretty good job making sure any violent street gangs that formed had easy access to lots of money, making them more lucrative and more able to expand and war with eachother.

      There is ample evidence that drug addiction is not the cause of criminality either. However, criminality is the entirely predictable result of raising the price of people's addictions beyond their ability to pay and causing them to make irrational decisions like choosing between drugs and food or criminal acts and starvation.

      Do you blame the drug addict who knows a little chemistry and knows he can feed his own addiction and maybe make some money cooking meth? Or do you blame the policy makers who created the black market for meth in the first place? No (or exceedingly few, there is always one of anything) homes burned before drug laws came to town. Now? Now half the people in burn units are there as a result of meth cooking..... and.,... the laws haven't even reduced drug use!

      Whats worst, if you go back, its pretty clear all this hubub started as a jobs program after alcohol prohibition. It was the very people like Harry Anslinger who were facing possible loss of funding and their jobs with it, if new drug laws were not created..... they lied to congress like it was their job. Seriously, google good old Harry, you will see.

      On the other hand, we have the swiss heroin study that looked at EXACTLY these issues. What did they do? Very simply....they provided heroin to junkies at what they believed would be an open market rate without prohibition and a safe place to use their drug. The result? well, they continued to use heroin, but there was a reported 90% drop in all other forms of criminality.

      Drugs are not the problem, idiots who think they can solve all problems by just making laws against anything they dislike who are the problem.

      --
      "I opened my eyes, and everything went dark again"
  3. The song was wrong! by dohzer · · Score: 3, Insightful

    So there *isn't* a fine line between pleasure and pain. At least in this case.

  4. It's true! by slashmydots · · Score: 4, Funny

    I took some Tylenol this morning for a headache and when I showed up, the support tickets were still bullshit, someone still claims I didn't fix something correctly, and I still hate my job and everyone there. Now I know why :P

    1. Re:It's true! by Anonymous Coward · · Score: 2, Funny

      You should take some happy pills and dismiss all bugs as WORKSFORME! It works for me.

  5. = paracetamol by ebcdic · · Score: 5, Informative

    Most of the world calls this drug paracetamol.

    1. Re:= paracetamol by mjwx · · Score: 4, Informative

      are you sure not Tylenol? also Panadol, Mapap, Tempra, Feverall, Ofirmev, Acephen, Mejoralito, Xl-dol, Bf-paradac, Aypanal, Aphen, Nortemp, Apap, Ringl

      Paracetamol == drug name.

      Panadol == brand name.

      I never ask for a pain reliever by it's brand name as brand name pain killers are more expensive than generics and the generics are just as effective.

      --
      Calling someone a "hater" only means you can not rationally rebut their argument.
    2. Re:= paracetamol by mjwx · · Score: 4, Informative

      Before dispensing pharmaceutical or medical advice please be aware of the limitations of what you say.

      You really need to start taking your own advice.

      Your sources come from brand name manufacturers. Of course they're going to claim generics dont work as well.

      The FDA and it's counterparts in every other western country has a requirement that all generic pharmaceuticals are as safe and effective as the brand name pharmaceuticals they're competing against.

      Studies have shown that generics are not only bioequivalent, but the lower cost leads to better adherence (I.E. patients "forget" to take the brand name medication more often).

      --
      Calling someone a "hater" only means you can not rationally rebut their argument.
    3. Re:= paracetamol by Malc · · Score: 5, Informative

      Growing up in the UK, I'd never heard of Tylenol until I moved to Canada as an adult. You occasionally hear it on American TV shows these days, but unless you know what the characters are referring to, it will just pass most people by. Even "acetaminophen" is an unknown term in the UK, it's always just "paracetamol"

      Tylenol is most definitely a N. American thing that nobody else knows about. Panadol seems to be the generic antipodean headache drug - I know this because my wife is Aussie and after six years in London she's still confusing people by saying "panadol" instead of "paracetamol" :)

    4. Re:= paracetamol by bsolar · · Score: 2

      Not sure about how it works in the USA but in Europe source is not generics' manufacturers, it's the European Medicines Agency which mandates that generics have to be manufactured with exaclty the same quality and active component dosages than the brand reference medicine: only name, packaging and inactive components can differ (and obviously, price).

  6. Re:Zoloft is a 1000 times worse by ProzacPatient · · Score: 4, Insightful

    I had depression in college. They put me on Zoloft. It makes your head feel like its in a cave. While I'm sure the intent is to make sure your lows are less, it also makes your highs less. How was I supposed to get undepressed if I can experience as much happiness as before? I guess its for people who experience lows way more often than they experience highs.

    How long were you on Zoloft? Sometimes the first few weeks can have very strange side effects that will diminish over time but on the other hand everyone's chemistry is different and perhaps Sertraline just isn't as compatible with your body as much as other people's bodies. Sometimes Prozac will work for a person who didn't get much benefit from Zoloft or perhaps Zoloft will work for someone who didn't get much benefit from Effexor. For me, personally, Zoloft has been a life saver; it elevates my moods and helps me control my anxiety.

    I also have this theory formulated from both my own personal experiences and my observations of other people is that people who have depression, or other mental disorders, are so used to such extreme emotions that taking a drug that brings them down to an emotionally nominal level feels like being turned into a zombie to them because they're only used to feeling everything to such an extreme.

  7. I'll bet the effect is very mild. by mjwx · · Score: 4, Insightful

    The article reported a "reduction" in responses to "pleasant and disturbing photos". So I wouldn't start claiming that it's having a very negative effect, or much of an effect at all. When I'm in enough pain to necessitate a pain killer I'm not usually worried about being as happy as I could be (9 times out of 10, it's so I can get to sleep). I typically use Ibuprofen (with a bit of codeine) as most of my pain is a result of inflammation and paracetamol isn't a good anti-inflamatory.

    --
    Calling someone a "hater" only means you can not rationally rebut their argument.
    1. Re:I'll bet the effect is very mild. by Shados · · Score: 3, Interesting

      Don't forget that in North America, people pop these pain killers like candies the moment their head feels a little stuffy.

      That makes it a bigger deal (of course the fact that they're overused in the first place is an issue in itself)

    2. Re:I'll bet the effect is very mild. by Shadow+of+Eternity · · Score: 2

      I was thinking the same thing. Maybe the real measurement here is that when you feel shitty you're not gonna be as happy even if you're on a painkiller.

      --
      A bullet may have your name on it but splash damage is addressed "To whom it may concern."
  8. Re:Laugh by newcastlejon · · Score: 3, Funny

    Doctor: Oh you're feeling suicidal... and so on and so on.

    I'm sorry, but I don't get it. Did they manage to kill the fly in the end?

    --
    If God forks the Universe every time you roll a die, he'd better have a damned good memory.
  9. Re:Zoloft is a 1000 times worse by Shakrai · · Score: 5, Informative

    The best anti-depressant I have found is distance running. The second best is other forms of cardio exercise. SSRIs or SNRIs? Been there, done that, they did very little to help me with depression. I don't even think they took the edge off, although it's hard to prove that negative. Tried Celexa, Zoloft, Effexor, Prozac, and a few other ones. Not only did they fail to address (or even make manageable) the depression, they all came with a lovely side effect and then six months of the other extreme when I discontinued them.

    --
    I want peace on earth and goodwill toward man.
    We are the United States Government! We don't do that sort of thing.
  10. Re:Aspirin is much better for you by Shakrai · · Score: 2

    Aspirin isn't a sliver bullet either....

    My preference is ibuprofen for head or muscle aches, followed by naproxen, and then aspirin. I'd concur with you about the liver impact of acetaminophen, I had my MD tell me once upon a time that I needed to cut back on the drinking, because of my liver results; I hadn't had a drink in over a month but had been on a regime of acetaminophen + codine following wisdom tooth surgery. That was a wake up call. :)

    --
    I want peace on earth and goodwill toward man.
    We are the United States Government! We don't do that sort of thing.
  11. Re: Zoloft is a 1000 times worse by Anonymous Coward · · Score: 5, Insightful

    Doctors lack a fundamental understanding of the effect the drugs they prescribe for mental health treatment, and are effectively guessing as to what they think will work.

    I came to this idea after a psychiatrist told me that the drugs were about balancing the chemicals in the brain, but I eventually realized that he had taken no measurements or anything before throwing any of them at me.

    So what balance was out of whack? What effect would the medications have? Oh wait, he didn't know. These concerns were dismissed and antagonized. I was merely a patient, I needed to learn to obey the doctor. So what did I learn?

    That the doctor, while purportedly concerned, was hardly treating me in a sound and reasonable manner, but was behaving in a way that worsened my problems and caused me several more issues.

    Only sheer chance got me out with relatively little harm.

    Maybe Zoloft, or Prozac, or whatever is serving you. There are others who are being damaged by the worst kind of treatment. One with delusions of grandeur.

    I'd have been safer going to an herb shop and inhaling a potpourri.

  12. Re:Positive emotions are a myth by TheReaperD · · Score: 2

    Than they are really out of luck as they're out double. I wanted to say doubly screwed but, it just didn't seem likely.

    --
    "Be particularly skeptical when presented with evidence confirming what you already believe." -
  13. Re:Zoloft is a 1000 times worse by Hartree · · Score: 2

    One of the problems is that depression isn't a single process. It's a symptom, and we lump a lot of things under that name.

    The exact details vary from patient to patient. Also, the differences in the way the drugs used to treat it are metabolized in different people can be pretty significant.

    I've taken Prozac for nearly as long as it's been available. It works well for me. When I've gone off of it to see if I could do without, the depression came back on a pretty predictable timeline. I tried another antidepressant, Effexor, and that didn't work so well for me. The additional effect it has on norepinephrine as well as the serotonin system (I'm guessing that's what it was based on what we know about how it works. YMMV) made me a bit too up, i.e. slightly hypomanic.

    The SSRIs don't work for everyone. It's usually taken about 3 tries for most of those I know who are taking them for definitely diagnosed depression to find the right one/the right dose. For a goodly number, they just don't work that well.

    The certainly aren't the only class of drugs that are like that. Blood pressure medications often have to be tailored in dose and kind before they lower the pressure enough without too many side effects.

    As another anon (maybe you) mentioned, regular exercise works very well for many people. But again, not so well for all, either due to inability to exercise, or just not working as well as in other people. (In fact, regular exercise programs are an excellent thing to try first in depression, IMHO as soon as other common medical causes like hypothyroidism are ruled out).

    As others have mentioned, when you're first starting a new antidepressant changing dosage, you need to be monitored by a health professional (which I'm not, thus take this as one man's views.). Mood changes and the possibility of suicidality aren't something to try to watch for by yourself as you're the one whose judgement is being impacted by them.

  14. Re:Positive emotions are a myth by narcc · · Score: 3, Funny

    Well, this is Slashdot...

  15. Re:Hmmmm by Mashiki · · Score: 3, Informative

    As someone who was prescribed acetaminophen with codeine(Tylenol 3) as a starter treatment for migraines I can say in my experience it does both. In the last 15 years I've since moved onto ultram and fiorinal c 1/2 which is it's own fucked up ball of wax. Why this is news though I have no idea, it was well known in the 1920's an 30's that both acetaminophen and codeine depressed the nervous system and they used it to treat shell shocked troops.

    --
    Om, nomnomnom...
  16. Re:Positive emotions are a myth by dunkelfalke · · Score: 2

    You jest, but people with major depression don't feel happy after either. Somewhat relaxed, sure, but still mostly miserable. That is, what a clinical depression does to people - they just can't enjoy anything anymore.

    --
    "It's such a fine line between stupid and clever" -- David St. Hubbins, Spinal Tap
  17. Re:Hmmmm by xanthines-R-yummy · · Score: 2

    No, they are not, as all good scientists are. From the actual journal article:

    "Some limitations of our work should be noted. Specifically, we cannot ascertain from the current studies whether acetaminophen might blunt individuals’ attention or motivation to process emotionally evocative stimuli instead of (or in addition to) their evaluative processing of these stimuli."

    Honestly, it's a pretty weak self-critique. I wish they had talked more about how meaningful the differences they found were. Yes, the p values were low, so they were statistically significant, but their graphs aren't so impressive to me. Then again, I'm not a psychologist (although I am a MD) and I'm not familiar with their assessment tools (the IAPS picture database?). So what do I know? :)

  18. Re:Zoloft is a 1000 times worse by grumling · · Score: 2, Interesting

    Yea, I used to think the same thing until I dated a woman who was bipolar. There are people out there with real problems, problems that aren't easily solved by "shake it off and take a lap." You probably went to the wrong doctor, who instead of taking the time to find out what your problem was (or wasn't), put you on the pharma cure.

    --
    "Well, good luck finding a judge that doesn't run a bestiality site."
  19. Re: Zoloft is a 1000 times worse by Sarten-X · · Score: 4, Interesting

    ...a psychiatrist told me that the drugs were about balancing the chemicals in the brain, but I eventually realized that he had taken no measurements or anything before throwing any of them at me.

    So what balance was out of whack? What effect would the medications have? Oh wait, he didn't know.

    He's likely even more annoyed about it than you are.

    The problem is that the imbalances may be located in a small part of the brain, and may be on the order of a few dozen molecules, from any of a few thousand chemicals. Thanks to the blood-brain barrier and the localized nature, the only way to actually measure such chemicals is with very invasive (and probably-lethal) brain surgery. There just isn't a simple test where the doctor can prick your finger, put a drop of blood in a magic machine, and tell you which of your neurons are misbehaving.

    For much the same reasons, there are no direct treatments. We can't just poke your amygdala until it works like everyone else - and even if we could, the rest of your brain may not accept the change, and your problems could get worse.

    Psychopharmacology is not engineering. The cause-and-effect relationships are not simple or direct. Rather than study in vain all of the chemical interactions in your brain, your doctor has studied in depth all of the medications he prescribes, memorizing all of their many side effects (with incidence rates) and known relationships to other medications.

    For the actual treatment, yes, it is purely educated guesswork. In your particular case, you may have showed symptoms of X but not Y, so you're a good candidate for treatment 1. That didn't work at all, so treatments 2 and 3 are ruled out, because they work on the same principles. Treatment 4 might be an option, but it only treats symptom Z, which you don't have, but in a certain percentage of cases it does absolutely nothing for Z and causes inverse symptoms to X and Y. Now, that treatment only begins to work after a three-month buildup, so let's start you on that while also trying treatment 5, which starts working immediately and doesn't interfere with treatment 4. Unfortunately the improvement from treatment 5 is very mild, but it can be improved with treatment 6 which amplifies the effects of 5, but does interact negatively with 4.

    These concerns were dismissed and antagonized. I was merely a patient, I needed to learn to obey the doctor. So what did I learn?

    We learned that you think you know psychopharmacology better than the person who's studied it for several years.

    Only sheer chance got me out with relatively little harm.

    Or your stubborn attitude provided the push to develop a coping mechanism on your own, which is also a perfectly valid (though sometimes risky) treatment. When done intentionally (usually involving the field of psychiatry, rather than psychopharmacology), it's more an attempt to change the person to fit their condition, rather than fixing the condition to fit the person.

    --
    You do not have a moral or legal right to do absolutely anything you want.
  20. Re:Zoloft is a 1000 times worse by facetube · · Score: 3, Informative

    The anti-depressant response to endurance exercise may be genotype-dependent. Read up on the OPRM1 A118G SNP (a genetic mutation of the mu opioid receptor); it's fascinating: http://www.nature.com/npp/jour....