“Registered with” is doing an enormous amount of work in that sentence. Side effects was my main issue with DHL too.

A plausible mechanism is not an outcome, and this class is the textbook example. How long have you been on adrafinil?

You have two changes at once here. You cannot attribute anything until one of them moves.

Log dose, time and sleep. Ten seconds a day and it turns the anecdote into something you can look at.