“My daughter’s doctor just switched her from Ritalin to Focalin. I noticed that her dose is much lower than it was for the first ADHD medication. Could this be a mistake?”
Focalin, a dextro-methylphenidate, is, essentially, a refined form of Ritalin, a methylphenidate. Both medications are short-acting, and they have similar side effects. The main difference is the dosage amount. As a rule of thumb, a patient’s dose of Focalin should be half the dose he’d take of Ritalin, so it seems that your daughter has the correct dosage.
As you should after every dose or medication change, observe for the next few weeks and let the doctor know if you see any side effects or if her symptoms do not improve.