"Taking one or two capsules in the morning has a similar wakefulness-promoting effect to drinking a cup or two of coffee in the morning
I’ve taken one capsule around 4-5pm a handful of times, which did not interfere with going to sleep at 10-11pm
Taking a capsule at 7pm gave me enough energy to do some work in the evening, and did not interfere with going to sleep at 11:30pm
Subjectively the peak effects of 100mg paraxanthine feel similar or weaker than those of 100mg caffeine, while 200mg paraxanthine feels stronger than 100mg caffeine
The effects seem to peak within an hour of dosing (maybe 30-45 minutes)
I sometimes feel a bit of an energy crash 2-3 hours after dosing when I take paraxanthine in the morning, but not in the afternoon/evening
But in the comments, Tomas B says:
I tried it for a few weeks."
Framing: assertive ·
First seen: 2026-08-18 ·
Last seen: 2026-08-20 ·
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