NRCME Drug Abuse and Alcoholism 3 — Questions and Answers
Question 1: Which substance produces a positive urine immunoassay for opioids and is commonly prescribed for ADHD?
- Amphetamine salts can cross-react but opioid screens are not affected by ADHD medications
- Methylphenidate, because it shares opioid receptor activity
- Pseudoephedrine, which reliably triggers opioid immunoassays
- Dextromethorphan at high doses, which may cause false-positive opioid screens (Correct answer)
Correct answer: Dextromethorphan at high doses, which may cause false-positive opioid screens
Dextromethorphan (found in many OTC cough preparations) can cause false-positive opioid immunoassay results at high doses.
Question 2: A Substance Abuse Professional (SAP) recommends 'follow-up testing' for a driver who has returned to duty. How long can the employer require this testing?
- At least 6 tests in the first 12 months, continuing for up to 5 years (Correct answer)
- Exactly 6 tests over 6 months, then testing stops automatically
- Until the driver requests cessation in writing
- Until the MRO certifies the driver is substance-free
Correct answer: At least 6 tests in the first 12 months, continuing for up to 5 years
DOT requires at least 6 unannounced follow-up tests within the first 12 months, and the SAP can direct testing for up to 60 months total.
Question 3: Which of the following is a disqualifying condition related to alcohol use under FMCSA medical standards?
- Current clinical diagnosis of alcoholism (Correct answer)
- A history of alcohol use disorder treated more than 5 years ago
- Consuming alcohol within 4 hours before driving
- A single episode of alcohol-related reckless driving more than 10 years prior
Correct answer: Current clinical diagnosis of alcoholism
FMCSA regulations disqualify drivers with a current clinical diagnosis of alcoholism regardless of treatment history.
Question 4: What is the primary pharmacological mechanism by which naltrexone reduces alcohol craving?
- Opioid receptor blockade, reducing the rewarding effects of alcohol (Correct answer)
- GABA-A potentiation, replacing the sedative effect of alcohol
- Dopamine agonism, stabilizing reward pathways
- Serotonin reuptake inhibition, improving mood independent of drinking
Correct answer: Opioid receptor blockade, reducing the rewarding effects of alcohol
Naltrexone blocks mu-opioid receptors, which reduces the euphoric and reinforcing effects of alcohol and decreases craving.
Question 5: A driver's DOT pre-employment urine test is reported as 'dilute negative.' What action is required?
- The employer may, but is not required to, order an immediate recollection under direct observation (Correct answer)
- The driver is automatically disqualified for specimen manipulation
- The test is treated as a positive result and the SAP process begins
- No further action is required; the driver may be hired
Correct answer: The employer may, but is not required to, order an immediate recollection under direct observation
A dilute negative result permits the employer to require one recollection under direct observation, though this is not mandatory for non-safety-sensitive employers.
Question 6: Which drug is most associated with causing persistent cognitive impairment that could affect commercial driving safety even after cessation?
- Chronic heavy alcohol use (Correct answer)
- Single-episode marijuana use
- Short-term benzodiazepine use for insomnia
- Low-dose aspirin
Correct answer: Chronic heavy alcohol use
Chronic heavy alcohol use causes Wernicke-Korsakoff syndrome and other forms of alcohol-related neurological damage that can persist after sobriety.
Question 7: Which DOT-mandated test type is triggered when a driver is involved in a fatal accident while operating a CMV?
- Post-accident testing, which must occur within 8 hours for alcohol and 32 hours for drugs (Correct answer)
- Random testing under the existing pool selection
- Pre-employment retesting regardless of prior test results
- Reasonable suspicion testing based on behavioral observations
Correct answer: Post-accident testing, which must occur within 8 hours for alcohol and 32 hours for drugs
Post-accident testing is required following a fatal accident; alcohol testing must occur within 8 hours and drug testing within 32 hours.
NRCME Drug Abuse and Alcoholism 3
Which substance produces a positive urine immunoassay for opioids and is commonly prescribed for ADHD?