TLDR: Finding a good doctor is really the best way to figure out what is best for you. I also have ADD & tried Modafinil as an alternative. My doctor prescribe

TLDR: Finding a good doctor is really the best way to figure out what is best for you. I also have ADD & tried Modafinil as an alternative. My doctor prescribed me 200MG as well, and it gave me splitting headaches and, until I learned to eat first, stomach aches. My doctor suggested I try 50 MGs & 100MGs instead, which didn't give me headaches but, well, just weren't as effective for me. So I went back to the old meds. Also, Modafinil, IME, isn't like other ADD meds. Unlike, eg, Adderall or Vyvanse, doesn't keep me awake or alert, or replace caffeine. But, obviously this varies, since modafinil is also prescribed for narcolepsy & other people here clearly have a different experience with it. Basically, chemistry varies for each of us--and there are many variables, including metabolism, medical history, weight, what your diet is, whether & what you've eaten, and so much more. Going to the doctor is not only safer, its more efficient.