OBJECTIVE : To examine the safety and tolerability of clonidine used alone or with methylphenidate in children with attention-deficit/hyperactivity disorder ( ADHD ) .
O O O O O O O O O B-ChemicalEntity O O O O B-ChemicalEntity O O O B-DiseaseOrPhenotypicFeature I-DiseaseOrPhenotypicFeature O B-DiseaseOrPhenotypicFeature O O