One in 10 kids will suffer some side-effects from an ADHD medication such as Ritalin or Concerta.
These include becoming withdrawn, teary, angry, upset, irritable or unhappy.
If the stimulant is introduced gradually, or the dose lowered, the risk of these problems is greatly reduced.
If your child remains doped, dazed, unhappy or "different" on his ADHD medication, he isn't being correctly treated and you need to raise this with your doctor.
Read our Expert Q&A about natural alternatives to ADHD meds