Drugs and Your Brain
A science-based learning module for youth, parents, and educators
This comprehensive module explores how the brain works, how drugs change brain function, and why young people are especially vulnerable to substance misuse.
Core Learning Modules
Six comprehensive lessons exploring brain science, drug effects, and prevention strategies
Lesson 1 - How the Brain Works
Key Points
The brain controls everything you think, feel, and do. It communicates using neurons
that send messages via neurotransmitters across synapses.
that send messages via neurotransmitters across synapses.
source: nida.nih.gov
Neurotransmitters fit into receptors like a key in a lock, allowing brain cells to
communicate and coordinate movement, emotion, memory, and decision-making.
communicate and coordinate movement, emotion, memory, and decision-making.
source: nida.nih.gov
Youth-Friendly Explanation
Think of your brain as a giant communication network. Signals travel along “message
highways” to help you walk, make choices, or feel happy.
highways” to help you walk, make choices, or feel happy.
Lesson 2 - How Drugs Affect the Brain
Key Effects of Drugs
Drugs interfere with how neurons send, receive, and process signals.
source: nida.nih.gov
Many addictive drugs flood the brain’s basal ganglia (reward center) with dopamine,
creating intense pleasure and making it difficult to feel good without the drug.
creating intense pleasure and making it difficult to feel good without the drug.
source: nida.nih.gov
Drugs overstimulate the extended amygdala, increasing stress and discomfort
during withdrawal.
during withdrawal.
source: nida.nih.gov
Drugs weaken the prefrontal cortex, reducing impulse control and decision-making.
source: nida.nih.gov
Some drugs, such as opioids, can slow breathing by affecting the brain stem,
leading to life-threatening overdose.
leading to life-threatening overdose.
source: nida.nih.gov
Youth-Friendly Explanation
When drugs enter the brain, they “hijack” the communication system — tricking it
into releasing big rewards or shutting down important safety controls like breathing.
into releasing big rewards or shutting down important safety controls like breathing.
Lesson 3 - The Developing Brain
Key Points
Brain development continues into the mid-20s; teens rely more heavily on the amygdala,
which can lead to more impulsive decisions.
which can lead to more impulsive decisions.
source: action-rehab.com
Drugs disrupt maturing brain circuits, especially those responsible for judgment,
memory, emotional regulation, and self-control.
memory, emotional regulation, and self-control.
source: action-rehab.com
Prolonged drug exposure can alter brain structure, increasing the risk for
mental health challenges and addiction.
mental health challenges and addiction.
source: action-rehab.com
Youth-Friendly Explanation
Teen brains are still under construction. Drugs can interrupt this building process,
creating long-term “gaps” in thinking, planning, and emotional balance.
Lesson 4 - Drug Types & Brain Impact
Drug Types & Brain Effects
Opioids: Slow breathing and create strong reward surges that can
increase overdose risk.
increase overdose risk.
source: nida.nih.gov
Stimulants (cocaine, meth, prescription stimulants): Overload dopamine
pathways, raise heart rate, and impair impulse control.
pathways, raise heart rate, and impair impulse control.
source: addictioneducation.org
Marijuana: Disrupts memory, coordination, and learning,
especially in developing brains.
especially in developing brains.
source: addictioneducation.org
Inhalants: Deprive the brain of oxygen, damaging multiple brain areas
and increasing risk of sudden death.
and increasing risk of sudden death.
source: addictioneducation.org
Lesson 5 - Why Quitting Is Hard
Key Points
Drugs produce repeated dopamine surges that “rewire” the brain’s reward system,
making everyday pleasures feel less satisfying over time.
making everyday pleasures feel less satisfying over time.
source: nida.nih.gov
Withdrawal activates the extended amygdala, triggering stress, cravings,
anxiety, and physical discomfort.
anxiety, and physical discomfort.
source: nida.nih.gov
Youth-Friendly Explanation
The brain starts to “expect” the drug. Without it, everything can feel off or overwhelming.
That’s why support, treatment, and time are so important for recovery.
That’s why support, treatment, and time are so important for recovery.
Lesson 6 - Prevention & Choice
Strategies for Youth
Understand how drugs affect the brain — knowledge builds power and confidence
in making healthier choices.
in making healthier choices.
Build refusal skills through role-play or evidence-based models such as
LifeSkills Training.
LifeSkills Training.
source: addictioneducation.org
Find healthy dopamine boosters such as exercise, music, learning new skills,
and positive friendships.
and positive friendships.
Strategies for Educators & Parents
Use NIDA’s Mind Matters series for structured, science-based lessons.
source: addictioneducation.org
Use interactive tools such as the University of Utah’s Mouse Party
to visualize how drugs affect reward pathways in the brain.
to visualize how drugs affect reward pathways in the brain.
source: brainfacts.org
Encourage open conversations and stigma-free discussions so youth feel safe
asking questions and seeking support.
asking questions and seeking support.
Educational Resources
Download or view our comprehensive educational materials to support your learning and teaching.