3.3 Psychopharmacology and Substance Effects

Medication knowledge without exceeding scope

EPPP psychopharmacology questions usually ask what a psychologist should recognize, assess, document, communicate, or refer. The exam does not expect most candidates to act as prescribers. It does expect awareness that medications and substances affect mood, cognition, sleep, movement, motivation, risk, and treatment participation.

Study medication classes by clinical purpose and common concern. Antidepressants may involve activation, sexual side effects, sleep change, or adherence problems. Antipsychotics may involve metabolic, motor, sedation, or prolactin-related concerns. Mood stabilizers require medical monitoring. Stimulants and nonstimulants can be used for attention-related conditions. Anxiolytics and sedative-hypnotics raise questions about sedation, dependence, falls, and substance interactions.

Substance-related concepts overlap with biological bases. Intoxication can produce mood, anxiety, psychotic, cognitive, and behavioral symptoms. Withdrawal can create sleep disturbance, irritability, dysphoria, tremor, agitation, confusion, or medical danger depending on substance and history. Tolerance means adaptation has changed the effect of a substance. Substance-induced symptoms must be considered before settling on a primary psychiatric explanation.

Adherence is also psychological. Clients may stop medication because of side effects, cost, stigma, cultural beliefs, pregnancy concerns, mistrust, low insight, cognitive impairment, or poor communication with the prescriber. A strong answer explores barriers and supports informed decision-making rather than scolding.

Scenario pattern: a client taking an antipsychotic reports new restlessness and inability to sit still. A strong response considers akathisia as a possible medication-related adverse effect, assesses safety and distress, and coordinates with the prescriber. It does not assume the client is merely noncompliant.

Scenario pattern: a client with panic symptoms uses high amounts of caffeine and intermittent cannabis. A careful response assesses substance timing and effects, because substances can trigger or amplify anxiety-like symptoms. The answer still considers panic disorder, trauma, medical causes, and context.

Scope reminders:

• Do not start, stop, or change medication unless legally authorized and competent in that role.
• Do ask about medication name, dose as reported, timing, adherence, perceived benefits, side effects, and prescriber contact.
• Do encourage urgent care when symptoms suggest medical danger, severe reaction, overdose, withdrawal risk, or imminent safety concern.
• Do obtain releases when needed for coordination, while respecting confidentiality and jurisdictional law.

This domain also prepares candidates for Part 2-Skills style reasoning. Even though this chapter teaches Part 1 knowledge, applied items may ask how to communicate medication concerns, consult, document risk, or adapt treatment when biological variables affect functioning.