Interestingly, I find that medication does not affect my hyperfocus in a negative way. If anything, it's even easier for me to achieve hyperfocus on a task when my Adderall is "on". I find that what medication helps me most with is the initial hurdle of starting a task. Once I actually get going, I'll usually hyperfocus on it (if it's the type of task I hyperfocus on, which includes programming, but sadly does not include housework). I procrastinate at work far far less when I'm medicated. Without medication, I struggle hard with starting new tasks.