Which of the following is not considered a stimulant medication for ADHD?

Atomoxetine is not classified as a stimulant medication for ADHD. It is a selective norepinephrine reuptake inhibitor (NRI) that works by increasing norepinephrine levels in the brain, but it does not primarily target dopamine pathways, which is characteristic of stimulant medications.

Stimulant medications for ADHD, such as methylphenidate, dexmethylphenidate, and Adderall (which contains amphetamine salts), function by increasing the availability of neurotransmitters like dopamine and norepinephrine. These medications typically show rapid onset and are often effective for symptom control in ADHD, engaging the dopaminergic pathways associated with attention and impulse control.

In contrast, atomoxetine, being a non-stimulant, has a different mechanism of action, and it is generally used for patients who may not tolerate stimulants well, have a history of substance misuse, or where a stimulant is contraindicated. While atomoxetine can be effective in managing ADHD symptoms, its classification as a non-stimulant sets it apart from the other listed options.