Dose: Too much has already been written about this. My prescription is for 250 mg tablets. I’m too scared to take a whole one. I usually take a sixth of a 500 mg tablet, or about 0.08 g, meaning I consume 40 mg of active ingredient.

Result: You will not feel the kind of tiredness that is a wanting-to-sleep. You can lay and enjoy resting—vegging out; but you will not feel pulled into sleep. There is none of that wanting-to-go-under.

Well, it turns out, unsurprisingly, that making you feel that also brings raises your baseline alertness, specifically, your willingness to exert cognitive effort. The fatigue of continuous methodical ratiocination never comes. Only a desire to let go (of sustaining imaginary objects and their relations) and rest occasionally.

Tips:Take it right after waking. It will keep you up 18 hours.

Reflections: It takes away the sleep-pull and that’s all I’ve noticed. I’ve not noticed any cognitive enhancement except for this: stabilizing the identity and arrangement of concepts and images is more automatic. So if “clarity” means that (1) your concepts don’t evaporate and (2) multi-part structures don’t fall apart, then it improves clarity.

It does not have a motivation enhancing effect of Adderall.