Can parents believe websites' information about methylphenidate's side effects?

Background: Attention deficit and hyperactivity disorder (ADHD) is one of the most common behavioural disorders, affecting around 5% of the global population. Methylphenidate is recommended as the first-line drug treatment for ADHD for children over the age of 5 in the UK. It can have many side effects and it is important that families are well informed.