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Psychology
Grade 11-12
Psychopharmacology Basics Cheat Sheet
A printable reference covering neurotransmitters, agonists, antagonists, drug effects, tolerance, withdrawal, and medication safety for grades 11-12.
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Psychopharmacology is the study of how drugs affect thoughts, emotions, behavior, and the nervous system. This cheat sheet helps students connect psychology topics like neurotransmission, mental health treatment, addiction, and drug safety. It is useful because many psychological disorders involve brain chemistry, but medication effects also depend on biology, environment, and behavior. Students should use it as a clear reference for key terms, mechanisms, and common misconceptions.
Key Facts
- A psychoactive drug is any substance that changes mood, perception, thinking, or behavior by affecting nervous system activity.
- An agonist increases a neurotransmitter's effect by mimicking it, increasing its release, or blocking its reuptake or breakdown.
- An antagonist decreases a neurotransmitter's effect by blocking receptors, reducing release, or interfering with synthesis.
- Reuptake is the process in which a neurotransmitter is taken back into the presynaptic neuron after being released into the synapse.
- SSRIs increase serotonin availability by blocking serotonin reuptake, but their mood effects often take several weeks to appear.
- Tolerance means a person needs a larger dose of a drug to get the same effect after repeated use.
- Withdrawal is the physical or psychological discomfort that can occur when a dependent person stops or reduces a drug.
- Therapeutic effect is the intended helpful effect of a medication, while side effects are unintended effects that may also occur.
Vocabulary
- Psychopharmacology
- The study of how drugs affect the brain, behavior, emotions, and mental processes.
- Neurotransmitter
- A chemical messenger released by neurons to communicate with other neurons, muscles, or glands.
- Agonist
- A drug or chemical that increases the action of a neurotransmitter or activates a receptor.
- Antagonist
- A drug or chemical that blocks or reduces the action of a neurotransmitter at a receptor.
- Tolerance
- A reduced response to a drug after repeated use, often requiring more of the drug to produce the same effect.
- Dependence
- A condition in which the body or mind adapts to a drug and has difficulty functioning normally without it.
Common Mistakes to Avoid
- Confusing agonists with antagonists is wrong because agonists increase neurotransmitter activity, while antagonists decrease or block it.
- Assuming more neurotransmitter always means better functioning is wrong because too much or too little activity can both disrupt mood, attention, movement, or perception.
- Thinking psychiatric medication changes personality instantly is wrong because many medications adjust brain signaling gradually and effects vary by person.
- Using tolerance and addiction as identical terms is wrong because tolerance is reduced drug response, while addiction involves compulsive use despite harm.
- Ignoring dose and context is wrong because the same drug can have different effects depending on amount, route of administration, biology, expectations, and environment.
Practice Questions
- 1 A drug blocks dopamine receptors so dopamine cannot bind effectively. Is this drug acting as an agonist or antagonist?
- 2 A student takes 10 mg of a medication at first, but after repeated use needs 20 mg for the same effect. What process is this an example of?
- 3 An SSRI blocks serotonin reuptake in the synapse. What happens to serotonin availability between neurons?
- 4 Why can two people respond differently to the same psychoactive drug even when they take the same dose?