Which drug designated for ADHD is classified as a controlled substance?

Lisdexamfetamine is classified as a controlled substance because it is a stimulant medication that affects neurotransmitters in the brain, particularly dopamine and norepinephrine. As a stimulant used to treat attention deficit hyperactivity disorder (ADHD), it has the potential for abuse and dependence, which is why it falls under the Controlled Substances Act.

Stimulants like lisdexamfetamine are carefully regulated due to their ability to enhance focus and energy levels, which can lead to misuse in individuals without ADHD. This classification ensures that there are strict regulations governing their prescription and dispensing to monitor and control their use for legitimate medical purposes.

In contrast, other options like clonidine and atomoxetine are not classified as controlled substances. Clonidine is an alpha-2 adrenergic agonist, often used in ADHD treatment as a non-stimulant, while atomoxetine is a selective norepinephrine reuptake inhibitor that is also non-stimulant and has a lower potential for abuse. Desipramine is a tricyclic antidepressant, which, despite some usage overlaps, is not categorized as a controlled substance either. Thus, lisdexamfetamine stands out as the only controlled substance among the listed options.