I have always had issues that are consistent with low-to-moderate ADD (never bothered getting diagnosed) and caffeine provides a noticeable, but not drastic, im

I have always had issues that are consistent with low-to-moderate ADD (never bothered getting diagnosed) and caffeine provides a noticeable, but not drastic, improvement for me. I've never tried any other drugs. It is probably safe to say the effectiveness of caffeine/modafinil/adderall depends on your unique personality, brain chemistry, etc.