One major confounder is that caffeine is also a painkiller, many people have mild chronic pain, and I think there’s a very plausible mechanism by which painkillers improve productivity, i.e. just allowing someone to focus better.
Anecdotally, I’ve noticed that “resetting” caffeine tolerance is very quick compared to most drugs, taking something like 2-3 days without caffeine for several people I know, including myself.
I’m under the impression that there’s no general evidence for stimulants increasing productivity, although there are several specific cases, such as e.g. treating ADHD.
One major confounder is that caffeine is also a painkiller, many people have mild chronic pain, and I think there’s a very plausible mechanism by which painkillers improve productivity, i.e. just allowing someone to focus better.
Anecdotally, I’ve noticed that “resetting” caffeine tolerance is very quick compared to most drugs, taking something like 2-3 days without caffeine for several people I know, including myself.
The studies I could find on caffeine are highly contradictory, e.g. from Wikipedia, “Caffeine has been shown to have positive, negative, and no effects on long-term memory.”
I’m under the impression that there’s no general evidence for stimulants increasing productivity, although there are several specific cases, such as e.g. treating ADHD.