I experimented with Modafinil back in 2013 when I was working on a startup like project, where I had a lot to do in different areas (hardware, software, backend

I experimented with Modafinil back in 2013 when I was working on a startup like project, where I had a lot to do in different areas (hardware, software, backend, frontend etc etc). Modafinil really helped me concentrate. But sometimes it was also a "miss". That is, I would focus on something totally unrelated to my project. For instance, one day I spent 6 hours comparing Vegas hotel room prices over different days of a month. The side effects were annoying, to say the least. Itchy ears and eyes, dry mouth, occasional anxiety, talkativeness etc.