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Studies show Modafinil isn't effective in ADHD adults. It may have benefit in children with ADHD.

I think many prescribers give ADHD adults a high dose too soon causing side-effects. In my experience, it's best to start with a low dose and slowly increase as necessary. The myth is ADHD responds quickly, but observing hundreds of patients it takes months, not days, for benefit of treatment to develop. There's wisdom in the phrase, "start low and go slow".

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Yep. What you find often is that the drug is effective right away, at a 20-30-40% effectiveness level. But over time you learn to take advantage of the benefits more effectively, and get more used to the side effects, so it tends to increase significantly in effectiveness at the same dose over 6-8 weeks much like SSRIs, not because the effects last that long, but because you use the tools to improve the tools.

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