Which medication is approved for managing ADHD?

Dextroamphetamine is an effective medication specifically approved for the management of Attention Deficit Hyperactivity Disorder (ADHD). As a central nervous system stimulant, it works by increasing the levels of certain neurotransmitters in the brain, thereby enhancing focus, attention, and impulse control in individuals with ADHD.

In contrast, the other medications listed are used for different indications. Clonidine is often used for hypertension and can sometimes be utilized off-label for ADHD, but it is not a first-line treatment. Mirtazapine is primarily an antidepressant used to treat major depressive disorder and is not indicated for ADHD. Haloperidol, an antipsychotic, is used for conditions like schizophrenia and acute psychosis, and while it can sometimes be prescribed for severe behavioral issues in children, it is not a recognized treatment for ADHD.

Thus, the selection of dextroamphetamine relates directly to its proven efficacy and established use for managing the symptoms of ADHD, which distinguishes it from the other medications listed.