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How Adderall works: Mechanism of action explained

Medical News Today Published Sep 23, 2025 Reviewed Jun 30, 2026 ✓ Reviewed by citations.press editors
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Adderall contains two drugs: amphetamine and dextroamphetamine.
2 · drugs in Adderall
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Between 75% and 80% of children with ADHD will see improved symptoms with the use of stimulants such as Adderall.
at least 75 % · improved symptoms in children with ADHD
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Adderall typically begins to work within 1 to 2 hours of taking it.
at least 1 hours · time to onset
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Adderall (amphetamine/dextroamphetamine) is a prescription drug that treats attention deficit hyperactivity disorder (ADHD) and narcolepsy in adults and certain children. The drug works by increasing certain brain chemicals that help improve focus, attention, and self-control. The effectiveness of this drug may vary based on medical history and diagnosis.

Adderall belongs to a class of medications called central nervous system (CNS) stimulants. These drugs work by increasing brain activity by raising the levels of certain neurotransmitters.

The way a drug works is known medically as its mechanism of action. The mechanism of action for Adderall may vary depending on the condition it’s being used to treat.

Adderall is a prescription medication that contains two drugs: amphetamine and dextroamphetamine. It belongs to a class of medications called stimulants. It’s most commonly used to treat ADHD. Adderall is also effective for increasing daytime wakefulness in people with narcolepsy, although there is little related research available.

Adderall is considered a first-choice treatment option for ADHD. Studies of Adderall and Adderall XR show that the drugs help improve attention and focus, and reduce impulsivity. Between 75% and 80% of children with ADHD will see improved symptoms with the use of stimulants such as Adderall.

Adderall typically begins to work within 1 to 2 hours of taking it.

The effectiveness of this drug may vary based on your medical history. If you have questions about what to expect with Adderall, talk with your doctor for more information.

Disclaimer: Medical News Today has made every effort to make certain that all information is factually correct, comprehensive, and up to date. However, this article should not be used as a substitute for the knowledge and expertise of a licensed healthcare professional. You should always consult your doctor or another healthcare professional before taking any medication. The drug information contained herein is subject to change and is not intended to cover all possible uses, directions, precautions, warnings, drug interactions, allergic reactions, or adverse effects. The absence of warnings or other information for a given drug does not indicate that the drug or drug combination is safe, effective, or appropriate for all patients or all specific uses.

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