I wish I could use Modafinil but the standard dose leaves me with an intense migraines! I have increased choline to try and counter this but with the same dose it did help much. I'm revisiting the idea of taking it, or trying to take it, again after reading your post! I might cut the dose in half and see how that works for me. I did want to share that some nootropics can leave you with extreme anxiety. I would recommend doing a bit of research on the specific ingredients (if you're taking a pre-made stack) to see if you might be at risk for that side effect. I personally had anxiety with Huperzine A. and it was not fun! I have tried Alpha Brain by Onnit with some mild benefits, Adaptogen Blend by Foursigmatic (kept me calm and focused) , Advanced Nootropic by Nexus (nice 'flow' state), and then some! :) I am going to compile a list and review all of the ones I have tried. Some are definitely better than others!