Free CAADC Pharmacology and MAT Questions and Answers 1 — Questions and Answers
Question 1: Buprenorphine is referred to as a partial opioid agonist. What does this mean in the context of treating Opioid Use Disorder (OUD)?
- It completely blocks opioid receptors, preventing any opioid effect.
- It activates opioid receptors to a lesser degree than full agonists, creating a ceiling effect. (Correct answer)
- It only works when combined with naloxone.
- It is a short-acting medication that must be taken several times a day.
Correct answer: It activates opioid receptors to a lesser degree than full agonists, creating a ceiling effect.
As a partial agonist, buprenorphine binds to and activates opioid receptors but to a lesser degree than full agonists like heroin or methadone. This property creates a 'ceiling effect,' which reduces the risk of respiratory depression and overdose while still being effective at alleviating withdrawal symptoms and cravings.
Question 2: A client with Alcohol Use Disorder (AUD) is prescribed naltrexone. What is the primary mechanism of action by which this medication supports recovery?
- It causes a severe physical reaction (e.g., nausea, vomiting) if alcohol is consumed.
- It reduces the rewarding effects of alcohol and helps decrease cravings. (Correct answer)
- It stabilizes brain chemistry by mimicking the effects of alcohol.
- It treats underlying anxiety that often co-occurs with AUD.
Correct answer: It reduces the rewarding effects of alcohol and helps decrease cravings.
Naltrexone is an opioid antagonist that blocks the euphoric and rewarding effects of alcohol. By reducing the pleasurable feelings associated with drinking, it helps to decrease cravings and reduce the amount of alcohol consumed if a person does drink.
Question 3: Chronic, heavy use of stimulants like methamphetamine primarily impacts which two neurotransmitter systems, leading to significant mood disturbances and anhedonia during withdrawal?
- GABA and Glutamate
- Serotonin and Acetylcholine
- Dopamine and Norepinephrine (Correct answer)
- Endorphins and Anandamide
Correct answer: Dopamine and Norepinephrine
Methamphetamine causes a massive release and blocks the reuptake of both dopamine and norepinephrine. The depletion of these neurotransmitters following chronic use leads to the characteristic withdrawal symptoms of depression, fatigue, and anhedonia (inability to feel pleasure).
Question 4: A client has been taking high doses of alprazolam (Xanax) daily for over a year and wants to stop. What is the most significant risk of abrupt cessation, and what is the recommended clinical approach?
- Risk of severe depression; recommend immediate antidepressant medication.
- Risk of life-threatening seizures; recommend a slow, medically supervised taper. (Correct answer)
- Risk of rebound anxiety; recommend non-addictive anxiety medication.
- Risk of cardiac arrest; recommend inpatient hospitalization with cardiac monitoring.
Correct answer: Risk of life-threatening seizures; recommend a slow, medically supervised taper.
Abrupt cessation of a benzodiazepine after long-term use can lead to a severe, potentially life-threatening withdrawal syndrome that includes seizures. The standard of care is a slow, medically supervised taper, often using a long-acting benzodiazepine like diazepam, to safely manage withdrawal symptoms.
Question 5: Which medication for Opioid Use Disorder requires dispensing from a federally regulated Opioid Treatment Program (OTP) and has a significant risk of QT interval prolongation?
- Buprenorphine
- Naltrexone
- Disulfiram
- Methadone (Correct answer)
Correct answer: Methadone
Methadone is a full opioid agonist used for MAT that, due to its pharmacology and potential for diversion and overdose, is highly regulated and can only be dispensed through licensed OTPs. A known cardiac side effect is QT interval prolongation, which can increase the risk of a serious arrhythmia, requiring EKG monitoring in some patients.
Question 6: Disulfiram (Antabuse) is a medication used for Alcohol Use Disorder that works through which of the following mechanisms?
- Blocking opioid receptors to reduce alcohol cravings.
- Inhibiting an enzyme, leading to a toxic reaction when alcohol is ingested. (Correct answer)
- Modulating glutamate transmission to reduce withdrawal symptoms.
- Acting as a partial agonist at nicotinic receptors.
Correct answer: Inhibiting an enzyme, leading to a toxic reaction when alcohol is ingested.
Disulfiram works through aversion therapy by inhibiting the enzyme aldehyde dehydrogenase, which is necessary to metabolize alcohol. This leads to a buildup of acetaldehyde, a toxic substance, causing a highly unpleasant physical reaction (e.g., flushing, nausea, palpitations) if alcohol is consumed.
Free CAADC Pharmacology and MAT Questions and Answers 1
Buprenorphine is referred to as a partial opioid agonist.
What does this mean in the context of treating Opioid Use Disorder (OUD)?