No matter how much ibuprofen, acetaminophen or naproxen I have, it does absolutely nothing for me. No matter how much coffee I drink, I'm just as sleepy as ever. What gives?
This isn't just drugs in general. Melatonin puts me to sleep. Alcohol gets me drunk. Cigarettes make me jittery sometimes (although I've never, ever been addicted no matter how hard I "tried"... even a pack a day in college for a few months had no effect on me when I abruptly stopped).
I should point out a few things:
1) I do drink coffee a lot, but it's the same as with cigarettes. I can stop drinking it for weeks or months at a time, and I never feel any kind of withdrawal. When I start up again, it doesn't give me the intended effect at all.
2) Don't worry, I'm not popping entire bottles of Tylenol. I rarely take painkillers at all because they don't have an effect on me, so I don't think I have built up a resistance. Occasionally, when I get a truly horrible, brainsplitting headache, I try to take a painkiller in the hopes that something will happen. At that point, even when I take several times the recommended dosage, nothing happens to me at all.
3) I saw this post
, but I don't think it answers my question.