I started off taking these doses most people mention 20-30mg and I noticed the negative side effects feeling like I had too much caffiene irritability overstimulation some nausea and the like I didn't really like it much.

Then I started taking like 5-10 mg and that was the sweet spot, increased clarity, higher functioning, a sense of well being, better focus and concentrations, better memory recall, all the good stuff and none of the bad. I just wanted to point out to those that who are having a bad experience with it you may simply be sensitive like myself and overdosing on it by taking the recommended dosage.

It seems to intensify the effects of caffeine so I try to go easy on that combination. I also find it combines wonderfully with meditation making it easier to focus on the practice and go deeper and facilitating a greater and longer lasting sense of well being than either does alone.

I take it very infrequently once every few weeks or so.