A brief review of the efficacy and common side effects of pharmacological treatments for attention-deficit/hyperactivity disorder (ADHD) is presented. Methylphenidate and amphetamine continue to have the strongest base of empiric support. They are both available in extended- and immediate-release preparations. Although most children with ADHD respond favorably to either medication, many children who do not respond to one medication will respond to the other. Additional pharmacological options include the nonstimulant atomoxetine, the stimulant pemoline, the antidepressants bupropion and desipramine, and the antihypertensives clonidine and guanfacine. In selecting the appropriate pharmacological regimen, consideration should be given to the child's daily school and after-school schedule, the presence of aggressive symptoms, and the risk of diversion. Careful selection of an appropriate medication regimen and active engagement of the child, parents, and teacher in daily management may help to ensure long-term adherence.