Concerta is timed-release Ritalin, so it’s also an amphetamine. Which makes it all the more weird! No elevated heart rate (as far as I can tell), no anxiety, no euphoria, nothing you’d expect from stimulants.

Some additional context, 25yo, 195cm tall, just under 90kg. Medication normally needs a bit more of an oomph to work on me, but I still expected some effect you know?