CERTIFIED ALCOHOL AND DRUG COUNSELOR (CADC)
EXAM 2026 Updated Practice Questions Comprehensive Substance
Use Counseling Review • Detailed Explanations • Verified Answers •
Complete Success Workbook
DOMAIN 1: SCIENTIFIC PRINCIPLES OF SUBSTANCE USE AND CO-
OCCURRING DISORDERS (25%)
QUESTION 1
A client presents with slurred speech, unsteady gait, impaired judgment, and
slowed reaction time after consuming alcohol. These symptoms are BEST
described as:
A) Withdrawal syndrome
B) Alcohol intoxication
C) Alcohol dependence
D) Tolerance development
RATIONALE:
Correct Answer: B) Alcohol intoxication
Alcohol intoxication refers to the acute, reversible effects of alcohol on the central
nervous system. The symptoms described—slurred speech, unsteady gait (ataxia),
impaired judgment, and slowed reaction time—are classic signs of acute alcohol
intoxication. Intoxication represents the immediate physiological and behavioral
effects of substance use, distinct from withdrawal (which occurs when substance
use stops), dependence (a chronic condition characterized by impaired control), or
tolerance (the need for increased amounts to achieve the same effect).
Understanding the difference between intoxication and withdrawal is fundamental
to addiction counseling.
Option A (Withdrawal): Withdrawal occurs when substance use is reduced or
stopped, not during active use.
,Option C (Dependence): Dependence is a chronic condition involving impaired
control and continued use despite consequences.
Option D (Tolerance): Tolerance is the need for increased amounts of a substance
to achieve the desired effect.
QUESTION 2
According to the disease model of addiction, substance use disorder is BEST
conceptualized as:
A) A moral failing requiring spiritual correction
B) A learned behavior that can be unlearned through conditioning
C) A chronic, relapsing brain disorder characterized by compulsive substance
use
D) A temporary condition that resolves with willpower alone
RATIONALE:
Correct Answer: C) A chronic, relapsing brain disorder characterized by
compulsive substance use
The disease model of addiction, supported by major medical and professional
organizations, conceptualizes addiction as a chronic, relapsing brain disorder. This
model recognizes that addiction involves changes in brain structure and function,
particularly in the reward pathway and reinforcement circuits. Key features
include: 1) Compulsive substance use despite harmful consequences, 2) Impaired
control over use, 3) Craving and urges to use, and 4) A chronic course with
potential for relapse. This model reduces stigma and supports a medical/clinical
approach to treatment.
Option A: The moral model views addiction as a character flaw, which is outdated
and stigmatizing.
Option B: While behavioral components exist, addiction is not simply a learned
behavior.
Option D: Addiction is chronic and typically does not resolve with willpower
alone.
,QUESTION 3
A client who has been using opioids for several months reports needing
increasingly higher doses to achieve the same effect. This phenomenon is BEST
described as:
A) Withdrawal
B) Tolerance
C) Cross-tolerance
D) Sensitization
RATIONALE:
Correct Answer: B) Tolerance
Tolerance is the phenomenon in which repeated exposure to a substance leads to
reduced responsiveness, requiring increasingly higher doses to achieve the same
effect. Tolerance is a hallmark of physiological adaptation to substances and is one
of the criteria for substance use disorder in the DSM-5. It can develop to various
effects of a substance (e.g., euphoria, sedation) and is distinct from dependence
(which involves withdrawal symptoms upon cessation).
Option A (Withdrawal): Withdrawal refers to symptoms that occur when
substance use is reduced or stopped.
Option C (Cross-tolerance): Cross-tolerance occurs when tolerance to one
substance reduces the effect of another substance in the same class.
Option D (Sensitization): Sensitization is the opposite of tolerance—increased
response to a substance with repeated exposure.
QUESTION 4
Which of the following substances is classified as a central nervous system (CNS)
depressant?
A) Cocaine
B) Methamphetamine
, C) Alcohol
D) Nicotine
RATIONALE:
Correct Answer: C) Alcohol
Alcohol is a central nervous system (CNS) depressant that slows brain activity and
reduces neural functioning. CNS depressants decrease arousal, reduce anxiety, and
impair cognitive and motor functioning. Other CNS depressants include
benzodiazepines, barbiturates, and sedative-hypnotics. In contrast, stimulants like
cocaine, methamphetamine, and nicotine increase CNS activity.
Option A (Cocaine): Cocaine is a CNS stimulant.
Option B (Methamphetamine): Methamphetamine is a CNS stimulant.
Option D (Nicotine): Nicotine is a CNS stimulant.
QUESTION 5
A client with alcohol use disorder abruptly stops drinking and develops tremors,
sweating, nausea, and anxiety. The counselor should recognize this as:
A) Alcohol intoxication
B) Alcohol withdrawal
C) Alcohol tolerance
D) A normal reaction to sobriety
RATIONALE:
Correct Answer: B) Alcohol withdrawal
Alcohol withdrawal occurs when a person who has been consuming alcohol
heavily and regularly significantly reduces or stops alcohol intake. Symptoms of
alcohol withdrawal can include tremors, sweating, nausea, anxiety, insomnia, and
in severe cases, seizures or delirium tremens. Withdrawal is a physiological
response reflecting the body's adaptation to alcohol and is a criterion for alcohol
EXAM 2026 Updated Practice Questions Comprehensive Substance
Use Counseling Review • Detailed Explanations • Verified Answers •
Complete Success Workbook
DOMAIN 1: SCIENTIFIC PRINCIPLES OF SUBSTANCE USE AND CO-
OCCURRING DISORDERS (25%)
QUESTION 1
A client presents with slurred speech, unsteady gait, impaired judgment, and
slowed reaction time after consuming alcohol. These symptoms are BEST
described as:
A) Withdrawal syndrome
B) Alcohol intoxication
C) Alcohol dependence
D) Tolerance development
RATIONALE:
Correct Answer: B) Alcohol intoxication
Alcohol intoxication refers to the acute, reversible effects of alcohol on the central
nervous system. The symptoms described—slurred speech, unsteady gait (ataxia),
impaired judgment, and slowed reaction time—are classic signs of acute alcohol
intoxication. Intoxication represents the immediate physiological and behavioral
effects of substance use, distinct from withdrawal (which occurs when substance
use stops), dependence (a chronic condition characterized by impaired control), or
tolerance (the need for increased amounts to achieve the same effect).
Understanding the difference between intoxication and withdrawal is fundamental
to addiction counseling.
Option A (Withdrawal): Withdrawal occurs when substance use is reduced or
stopped, not during active use.
,Option C (Dependence): Dependence is a chronic condition involving impaired
control and continued use despite consequences.
Option D (Tolerance): Tolerance is the need for increased amounts of a substance
to achieve the desired effect.
QUESTION 2
According to the disease model of addiction, substance use disorder is BEST
conceptualized as:
A) A moral failing requiring spiritual correction
B) A learned behavior that can be unlearned through conditioning
C) A chronic, relapsing brain disorder characterized by compulsive substance
use
D) A temporary condition that resolves with willpower alone
RATIONALE:
Correct Answer: C) A chronic, relapsing brain disorder characterized by
compulsive substance use
The disease model of addiction, supported by major medical and professional
organizations, conceptualizes addiction as a chronic, relapsing brain disorder. This
model recognizes that addiction involves changes in brain structure and function,
particularly in the reward pathway and reinforcement circuits. Key features
include: 1) Compulsive substance use despite harmful consequences, 2) Impaired
control over use, 3) Craving and urges to use, and 4) A chronic course with
potential for relapse. This model reduces stigma and supports a medical/clinical
approach to treatment.
Option A: The moral model views addiction as a character flaw, which is outdated
and stigmatizing.
Option B: While behavioral components exist, addiction is not simply a learned
behavior.
Option D: Addiction is chronic and typically does not resolve with willpower
alone.
,QUESTION 3
A client who has been using opioids for several months reports needing
increasingly higher doses to achieve the same effect. This phenomenon is BEST
described as:
A) Withdrawal
B) Tolerance
C) Cross-tolerance
D) Sensitization
RATIONALE:
Correct Answer: B) Tolerance
Tolerance is the phenomenon in which repeated exposure to a substance leads to
reduced responsiveness, requiring increasingly higher doses to achieve the same
effect. Tolerance is a hallmark of physiological adaptation to substances and is one
of the criteria for substance use disorder in the DSM-5. It can develop to various
effects of a substance (e.g., euphoria, sedation) and is distinct from dependence
(which involves withdrawal symptoms upon cessation).
Option A (Withdrawal): Withdrawal refers to symptoms that occur when
substance use is reduced or stopped.
Option C (Cross-tolerance): Cross-tolerance occurs when tolerance to one
substance reduces the effect of another substance in the same class.
Option D (Sensitization): Sensitization is the opposite of tolerance—increased
response to a substance with repeated exposure.
QUESTION 4
Which of the following substances is classified as a central nervous system (CNS)
depressant?
A) Cocaine
B) Methamphetamine
, C) Alcohol
D) Nicotine
RATIONALE:
Correct Answer: C) Alcohol
Alcohol is a central nervous system (CNS) depressant that slows brain activity and
reduces neural functioning. CNS depressants decrease arousal, reduce anxiety, and
impair cognitive and motor functioning. Other CNS depressants include
benzodiazepines, barbiturates, and sedative-hypnotics. In contrast, stimulants like
cocaine, methamphetamine, and nicotine increase CNS activity.
Option A (Cocaine): Cocaine is a CNS stimulant.
Option B (Methamphetamine): Methamphetamine is a CNS stimulant.
Option D (Nicotine): Nicotine is a CNS stimulant.
QUESTION 5
A client with alcohol use disorder abruptly stops drinking and develops tremors,
sweating, nausea, and anxiety. The counselor should recognize this as:
A) Alcohol intoxication
B) Alcohol withdrawal
C) Alcohol tolerance
D) A normal reaction to sobriety
RATIONALE:
Correct Answer: B) Alcohol withdrawal
Alcohol withdrawal occurs when a person who has been consuming alcohol
heavily and regularly significantly reduces or stops alcohol intake. Symptoms of
alcohol withdrawal can include tremors, sweating, nausea, anxiety, insomnia, and
in severe cases, seizures or delirium tremens. Withdrawal is a physiological
response reflecting the body's adaptation to alcohol and is a criterion for alcohol
