<prompt> Drug of choice to treat attention- deficithyperactivity disorder?HaloperidolClonidineMethylphenidateDiazepam  <response>: Ans. C. MethylphenidateTreatment: Pharmacotherapy: first line of treatment1. CNS stimulants- DOC, CI with known cardiac risks abnormalitiesa. Methylphenidate Short sustained release preparations-dopamine agonist DOCSE- Headache, stomach, Nausea, insomniaRebound effects: mild irritability, Exacerbates ticsPotential growth suppression-drug holidays 