I've tried Modafinil several times, all of those times I also ended up with a terrible headache. At first I thought it was just me focussing on something and no

I've tried Modafinil several times, all of those times I also ended up with a terrible headache. At first I thought it was just me focussing on something and not drink for 4 hours, but even after forcing myself to drink a 1.5L bottle it kept on happening. I bought Ritalin and have used that multiple times without headache, I also prefer the 'state' of Ritalin over Modafinil. That being said, I don't have AD(H)D or anything, I just use it if I _have_ to focus or finish something late at night. This happens maybe a few times a year. I do owe my Bachelors degree to those substances, the last night before the deadline I pulled an allnigher on Ritalin.