Using data received from IMS Health Canada, an agency that tracks the use of prescription medications, W-FIVE discovered that in 2006, over one million prescriptions for ADHD medications, drugs like Ritalin, Adderall and Concerta, were written for children under the age of 18. And there were over 300,000 prescriptions filled for anti-depressants (SSRIs). Some people are increasingly worried about the sheer volume of these prescriptions.