METHODS: The Prescription Cost Analysis database presenting the primary care prescriptions data and the Interactive Drug Analysis Profiles presenting all suspected ADRs reported for each drug were screened. The data were analyzed using linear regression analysis to examine the annual average change per year.

RESULTS: The prescription items dispensed for ADHD showed an average 11.07% (95% CI 10.54-11.60, p = .001) increase per year and there was a mean 11.54% (95% CI 11.03-12.06, p = .001) increase per year in the costs. The overall reporting of serious and fatal ADR was reduced by 1.79% per year for ADHD drugs. Guanfacine showed a 40% mean increase per year.