What doesn't mix for me is caffeine and Focalin. When I'm not on Focalin, I can drink caffeine in moderation and feel fine. A single cup of coffee when I'm on

What doesn't mix for me is caffeine and Focalin. When I'm not on Focalin, I can drink caffeine in moderation and feel fine. A single cup of coffee when I'm on Focalin, and I'm going to get so much less quality sleep that I feel like a wet dishrag in the morning.