Chemical Dependency Counselor CCDC Exam Pharmacology & Drug Classifications 2 — Questions and Answers
Question 1: Buprenorphine is best described as which type of pharmacological agent?
- Full opioid agonist
- Opioid antagonist only
- Partial opioid agonist with antagonist properties (Correct answer)
- Pure GABA modulator
Correct answer: Partial opioid agonist with antagonist properties
Buprenorphine is a partial opioid agonist/antagonist that produces lower levels of euphoria than full agonists while reducing cravings and withdrawal symptoms.
Question 2: Severe alcohol withdrawal is primarily life-threatening due to the risk of:
- Respiratory depression
- Seizures and delirium tremens (DTs) (Correct answer)
- Cardiac arrhythmia from QT prolongation
- Acute kidney failure
Correct answer: Seizures and delirium tremens (DTs)
Severe alcohol withdrawal can progress to seizures and delirium tremens, which can be fatal without proper medical management including benzodiazepine administration.
Question 3: The concept of 'cross-tolerance' in pharmacology refers to:
- Two drugs producing opposite effects when combined
- Tolerance to one drug reducing the effectiveness of a pharmacologically similar drug (Correct answer)
- A drug becoming more potent with repeated use
- The body eliminating two drugs at identical rates
Correct answer: Tolerance to one drug reducing the effectiveness of a pharmacologically similar drug
Cross-tolerance occurs when tolerance developed to one substance reduces the effects of pharmacologically similar substances acting on the same receptor systems.
Question 4: Methadone is effective in opioid maintenance therapy primarily because:
- It has no abuse potential whatsoever
- Its long half-life prevents withdrawal and reduces cravings with once-daily dosing (Correct answer)
- It completely blocks all opioid receptors
- It reverses opioid overdose within minutes
Correct answer: Its long half-life prevents withdrawal and reduces cravings with once-daily dosing
Methadone's long half-life of 24–36 hours allows once-daily dosing that stabilizes opioid levels, prevents withdrawal, and reduces cravings without producing significant euphoria at therapeutic doses.
Question 5: Which of the following withdrawal syndromes typically requires medical detoxification due to potential fatality?
- Cannabis withdrawal
- Stimulant (cocaine) withdrawal
- Opioid withdrawal in a healthy adult
- Alcohol withdrawal (Correct answer)
Correct answer: Alcohol withdrawal
Alcohol withdrawal is potentially fatal due to the risk of tonic-clonic seizures and delirium tremens; opioid withdrawal, while severe, is rarely life-threatening in otherwise healthy adults.
Question 6: Acamprosate (Campral) helps maintain abstinence in alcohol use disorder by:
- Causing aversive reactions when alcohol is consumed
- Modulating glutamate and GABA systems to reduce post-acute withdrawal cravings (Correct answer)
- Blocking opioid receptors to reduce drinking pleasure
- Replacing alcohol's sedative effects with a safer compound
Correct answer: Modulating glutamate and GABA systems to reduce post-acute withdrawal cravings
Acamprosate modulates the glutamate and GABA neurotransmission disrupted by chronic alcohol use, reducing post-acute withdrawal symptoms and alcohol cravings.
Question 7: The 'ceiling effect' of buprenorphine means that:
- There is no upper limit to its sedative properties
- Beyond a certain dose, increasing the dose does not proportionally increase opioid effects (Correct answer)
- It reaches peak blood levels within one hour of dosing
- It cannot be safely combined with any other medications
Correct answer: Beyond a certain dose, increasing the dose does not proportionally increase opioid effects
As a partial agonist, buprenorphine has a ceiling effect where doses beyond a threshold do not produce proportionally greater opioid effects, significantly reducing overdose risk compared to full agonists.
Chemical Dependency Counselor CCDC Exam Pharmacology & Drug Classifications 2
Buprenorphine is best described as which type of pharmacological agent?