Theophylline is a caffeine analogue used to treat asthma that is also a stimulant like caffeine. If anyone here has taken it, did it have noticeable stimulant effects? How do the effects compare to caffeine?
Yes, but I've heard it's a very small amount. I'm sort of surprised it's not more because I used to think it might be what accounts for the somewhat different effects of tea(it's more agitating for me).