Clandestine Drug Labs and Drug-related Hazards on Scene Practice Questions

25 multiple-choice questions on Clandestine drug labs and drug-related hazards on scene for paramedic and EMT students, from Chapter 53 (Crime Scene Awareness). Read each question, pick your answer, then tap Show answer to check it and read the explanation.

25 practice questions

1. You walk into a dark kitchen and realize it holds a drug lab. You should not turn on the light switch because:

   1. A. It will alert people in the house
   2. B. Police need the switch for fingerprints
   3. C. A spark could ignite chemical vapors
   4. D. The lights may be connected to a timer
   Show answer

   Answer: C. A spark could ignite chemical vapors

   Many lab chemicals give off flammable vapors that a spark from a switch, phone, or appliance can ignite. Leave lights and electrical items as they are and get out. Alerting occupants is a concern, but the immediate danger is a flash fire. Fingerprints matter to police but are not why you avoid the switch. A timer is not a reason to leave the switch alone.

2. In a garage, you find a flask bubbling on a hot plate with tubing running to a jug. The safest action is to:

   1. A. Unplug the hot plate to stop the reaction
   2. B. Leave it as is and back out of the garage
   3. C. Pull the tubing loose so vapors can escape
   4. D. Carry the flask outside to cool it down
   Show answer

   Answer: B. Leave it as is and back out of the garage

   Interrupting a reaction by unplugging, moving, or opening equipment can cause a fire, explosion, or toxic release. Touch nothing, withdraw, and report the lab to police and hazmat.

3. Which danger is unique to clandestine labs and is often missed by responders entering them?

   1. A. Fumes from household cleaners
   2. B. Guard dogs chained in the yard
   3. C. Dirty needles left on the floor
   4. D. Booby traps such as tripwires
   Show answer

   Answer: D. Booby traps such as tripwires

   Lab operators may protect their product with tripwires, explosive devices, or trapped doors. This is another reason EMS should not search or explore a suspected lab. Guard dogs, needles, and fumes from cleaners turn up at many drug and ordinary scenes and are usually easier to notice.

4. Driving to a call, you notice a house whose trash cans overflow with empty cold packs, stripped lithium batteries, and drain cleaner bottles. This most likely means:

   1. A. The family is doing repairs
   2. B. The home is a marijuana grow house
   3. C. The home may hold a meth lab
   4. D. Someone is treating a sports injury
   Show answer

   Answer: C. The home may hold a meth lab

   Lithium batteries, cold packs (ammonium nitrate), and drain cleaner are common precursors in methamphetamine production, and their waste often shows up in the trash. Approach with caution and tell police. Grow houses leave fertilizer, lighting, and wiring waste rather than batteries and drain cleaner, and an injury would not explain stripped batteries.

5. A house has reinforced doors, a dog chained by the porch, and a steady stream of people who stay only a few minutes. This pattern most suggests:

   1. A. A busy in-home day care business
   2. B. Drug sales, with a risk of weapons
   3. C. A large family that has just moved in
   4. D. A home health agency at the address
   Show answer

   Answer: B. Drug sales, with a risk of weapons

   Fortified doors, guard dogs, lookouts, and brief, frequent visits are signs of drug dealing. Such sites carry a high risk of firearms and violence, so consider asking for police before entering.

6. You need to look for ID in the jacket of an unconscious man found in a drug alley. The safest approach is to:

   1. A. Avoid reaching blindly into his pockets
   2. B. Turn the pockets out with a firm tug
   3. C. Reach in quickly with your gloved hand
   4. D. Have a bystander empty them for you
   Show answer

   Answer: A. Avoid reaching blindly into his pockets

   Needles and other sharps are often carried loose in pockets, and gloves do not stop a needlestick. Pat gently from the outside, cut pockets open if needed, or let police search.

7. An indoor marijuana grow operation poses a special danger to EMS from:

   1. A. Plant pollen that can cause anaphylaxis in the crew
   2. B. Cyanide gas released by the plants
   3. C. Bypassed wiring that can shock or start fires
   4. D. Ammonia fumes from the fertilizer
   Show answer

   Answer: C. Bypassed wiring that can shock or start fires

   Grow houses often steal power with illegal wiring that bypasses the meter, creating shock and fire risk; high humidity, mold, and carbon dioxide or carbon monoxide from generators add to the hazard. The plants do not release cyanide, fertilizer is not a major source of ammonia fumes, and pollen allergy is not a significant crew risk.

8. You are called to a routine fall in a home where white powder that may contain fentanyl is on a table near the patient. Recommended crew protection is:

   1. A. Nitrile gloves, a respirator, and eye protection
   2. B. A full chemical suit with a self-contained breathing apparatus
   3. C. No special protection, since the patient is not using
   4. D. Waiting outside until hazmat has removed the powder
   Show answer

   Answer: A. Nitrile gloves, a respirator, and eye protection

   NIOSH advises nitrile gloves whenever illicit drugs may be present and respiratory protection when powder is visible or suspected; its tiered guidance pairs a P100-class (or N100/R100) respirator with eye protection when small amounts are visible. Avoid disturbing the powder and wash with soap and water afterward. A full suit with SCBA is reserved for large amounts or liquid drug and trained teams. Visible powder calls for protection whether or not the patient used it. The patient needs care now, and routine PPE makes that safe without waiting for hazmat.

9. A man was burned when his home drug lab caught fire. Besides standard burn care, he also needs:

   1. A. Delayed care until police question him
   2. B. Transport in the cab to protect the crew in back
   3. C. Ice packs applied directly to the burns
   4. D. Decon for possible chemical contamination
   Show answer

   Answer: D. Decon for possible chemical contamination

   Lab fires often contaminate victims with solvents, acids, or ammonia, which keep injuring tissue and can expose the crew. Decontaminate before or as part of care; ice on burns adds cold injury.

10. At an overdose in a drug house, the patient's friends will not say what he took because they fear arrest. The best approach is to:

    1. A. Warn them that police will be called if they lie
    2. B. Explain that you are there for medical care
    3. C. Promise them that nobody there will be arrested
    4. D. Search the room yourself for the drugs he used
    Show answer

    Answer: B. Explain that you are there for medical care

    EMS is not law enforcement, and saying plainly that your goal is to help the patient often gets the history you need: what was taken, how much, and when. Threatening them with police makes people stop talking or turn hostile. You cannot promise immunity, since overdose Good Samaritan laws vary by state and arrests are a police decision. Searching the room exposes you to hidden needles and weapons and is a police task.

11. An apartment has a strong odor like cat urine, and your eyes start to burn. You should suspect:

    1. A. Carbon monoxide from a heater
    2. B. Chlorine bleach from a cleaning job
    3. C. Natural gas from a stove that is on
    4. D. Anhydrous ammonia from a meth lab
    Show answer

    Answer: D. Anhydrous ammonia from a meth lab

    A strong cat-urine smell and eye irritation suggest ammonia, a common meth-lab chemical. Carbon monoxide is odorless, and a gas leak smells of the mercaptan added to natural gas, which is more like rotten eggs.

12. You find burnt spoons, cotton balls, a belt, and syringes beside an unresponsive man. These items most suggest:

    1. A. Smoking crack cocaine from a pipe
    2. B. Snorting crushed prescription tablets
    3. C. Injection of heroin or another opioid
    4. D. Chewing khat leaves from East Africa
    Show answer

    Answer: C. Injection of heroin or another opioid

    Spoons for heating, cotton to filter, a belt as a tourniquet, and syringes are typical of injection drug use, most often opioids. Crack is smoked from glass pipes.

13. A man overdosed on what he thought were oxycodone tablets bought from a friend. The tablets look like real pharmacy pills. You should suspect:

    1. A. Counterfeit pills with fentanyl
    2. B. Pure oxycodone taken at a higher dose
    3. C. A reaction to the dye in the tablets
    4. D. An allergy to the tablet's binder
    Show answer

    Answer: A. Counterfeit pills with fentanyl

    Pills sold outside pharmacies are often counterfeits pressed to look like oxycodone or alprazolam but containing fentanyl; the DEA has reported that a large share of seized fake pills carried a potentially lethal dose. Expect profound respiratory depression, ventilate, and titrate naloxone; tell the ED what he took and leave remaining pills for police. Assuming pure oxycodone underestimates the risk. Dyes and binders do not cause an opioid toxidrome.

14. At a drug scene, powder that may contain fentanyl lands on your partner's bare wrist. He feels fine. The best action is to:

    1. A. Wipe it off with alcohol hand gel
    2. B. Wash it off with soap and water
    3. C. Give him naloxone before symptoms
    4. D. Brush it off and keep working
    Show answer

    Answer: B. Wash it off with soap and water

    Incidental skin contact with fentanyl is unlikely to cause opioid toxicity, and the recommended response is to wash it off promptly with soap and water and watch for symptoms. Wiping it off with alcohol hand gel is advised against because alcohol-based sanitizers may increase absorption through the skin. Naloxone is given for signs of opioid toxicity, such as slowed breathing, not before symptoms. Brushing off the powder can make it airborne, where it can be inhaled or reach the eyes, mouth, or nose, and he should not keep working until it is washed off. (ACMT/AACT 2017.)

15. After leaving a suspected lab, you and your partner have watery eyes and a cough. The most appropriate next step is to:

    1. A. Rest in the ambulance until the symptoms pass
    2. B. Return inside to identify the chemical for hazmat
    3. C. Decon, seek evaluation, and report the exposure
    4. D. Rinse your eyes and take the next call as usual
    Show answer

    Answer: C. Decon, seek evaluation, and report the exposure

    Possible chemical exposure of responders requires decontamination, medical evaluation, and an exposure report for occupational health follow-up. Going back inside to identify the chemical repeats the exposure.

16. Your partner lifts a patient covered in white powder and then becomes drowsy, with pinpoint pupils and a respiratory rate of 6/min. You should:

    1. A. Have him walk to stay awake
    2. B. Ventilate him and give naloxone
    3. C. Give oral glucose and recheck him
    4. D. Rinse his face and wait for hazmat
    Show answer

    Answer: B. Ventilate him and give naloxone

    Drowsiness, miosis, and slow breathing indicate opioid toxicity regardless of the route. Support ventilation and give naloxone; true responder toxicity is rare, but when it occurs it is treated like any opioid overdose.

17. An agitated man with a fast heart rate has blistered fingertips and small burns on his lips, with no other burns. These burns most suggest:

    1. A. A splash of hot oil while cooking
    2. B. An electrical burn from a frayed cord
    3. C. A sunburn from a long day outdoors
    4. D. Smoking from a hot glass pipe
    Show answer

    Answer: D. Smoking from a hot glass pipe

    People who smoke crack cocaine or methamphetamine burn their lips and their fingertips and thumbs on hot glass stems and lighters, and with agitation and tachycardia this points to stimulant use; also expect broken glass stems in pockets that can cut you. Hot oil splashes the hands, forearms, and face in a scattered pattern rather than only the lips and fingertips. An electrical burn shows contact points where current entered and left, not lip burns. Sunburn covers exposed skin broadly and does not blister just the fingertips.

18. Which feature of a clandestine lab makes it hazardous long after the lab is shut down?

    1. A. Residues soak into walls, carpet, and furnishings
    2. B. Lab chemicals break down within a few hours of shutdown
    3. C. The cooking equipment is the main lasting hazard
    4. D. Hazards end as soon as the windows are opened
    Show answer

    Answer: A. Residues soak into walls, carpet, and furnishings

    Meth and other lab chemicals leave residue on walls, carpet, and ducts that can expose later occupants and responders. Opening windows does not remove it, which is why former lab sites need professional cleanup.

19. You are called to a drug house for an overdose. The patient's friends are hiding bags and syringes as you arrive. The most important crew concern is:

    1. A. Needles and weapons may be concealed nearby
    2. B. The drugs are evidence you must collect
    3. C. The friends may need naloxone right away too
    4. D. You must count the bags for your report
    Show answer

    Answer: A. Needles and weapons may be concealed nearby

    People at drug scenes may hide sharps, drugs, and weapons in cushions, clothing, or bedding. Watch where you put your hands and knees; collecting drug evidence is a police task.

20. You are about to give naloxone to a heroin user who is apneic in a crowded drug house. To stay safe, you should first:

    1. A. Give a large IV dose to wake him quickly
    2. B. Ventilate and plan for sudden agitation
    3. C. Have friends hold his arms down firmly
    4. D. Restrain him before giving any naloxone
    Show answer

    Answer: B. Ventilate and plan for sudden agitation

    Rapid reversal can cause abrupt withdrawal, vomiting, and agitation. Ventilate first, titrate naloxone to breathing, and position the crew with an exit; a large bolus makes violent awakening more likely.

21. While kneeling beside a patient in a drug house, you see used syringes on the floor. The best action is to:

    1. A. Pick them up with your gloved fingers
    2. B. Recap each of them so no one gets stuck
    3. C. Move them aside with a tool, not your hands
    4. D. Push them under the couch with your foot
    Show answer

    Answer: C. Move them aside with a tool, not your hands

    Gloves do not prevent needlesticks. Use forceps or another tool to move sharps into a sharps container, or work around them; recapping by hand is a common cause of needlestick injury.

22. A clandestine lab is considered a crime scene and a hazmat scene. The agencies that should handle the lab itself are:

    1. A. EMS alone, until the patient has left the scene
    2. B. Police alone, since it is a crime scene
    3. C. Fire engine crews and code inspectors
    4. D. Police and hazmat or lab response teams
    Show answer

    Answer: D. Police and hazmat or lab response teams

    Labs require police for the criminal investigation and trained hazmat or clandestine lab teams for chemicals. EMS focuses on patient care and safety, and should not investigate or dismantle the lab. Police alone lack the training and equipment for the chemicals, and engine crews and code inspectors are not trained to dismantle a lab.

23. A stimulant user is paranoid and pacing in a room with a knife on the dresser. Before you approach, you should:

    1. A. Move in quickly before he picks up the knife
    2. B. Stay back and have police secure the knife
    3. C. Take the knife while he looks away
    4. D. Sit on the bed to seem calm and nonthreatening
    Show answer

    Answer: B. Stay back and have police secure the knife

    Paranoid stimulant users can turn violent without warning, and a knife within reach makes the scene unsafe. Keep your distance and let police secure the weapon before care.

24. Which odor is most often linked to solvents used in clandestine drug labs?

    1. A. A smell of rotten eggs or sulfur
    2. B. A sweet smell of fresh-cut grass
    3. C. A smell of bitter almonds
    4. D. An ether or strong solvent smell
    Show answer

    Answer: D. An ether or strong solvent smell

    Ether, acetone, and similar solvents give labs a strong chemical odor. Rotten eggs suggests hydrogen sulfide or a gas leak, fresh-cut grass suggests phosgene, and bitter almonds suggests cyanide.

25. After a call in a home with a suspected meth lab, your uniform smells strongly of chemicals. You should:

    1. A. Change and bag it per your agency's exposure plan
    2. B. Wear it home and wash it with the family laundry
    3. C. Air it out in the ambulance for the rest of shift
    4. D. Brush it off and finish your shift in it as usual
    Show answer

    Answer: A. Change and bag it per your agency's exposure plan

    Lab residues can cling to clothing and be carried into the ambulance or your home, exposing others. Remove and bag contaminated clothing and follow your agency's decon and exposure reporting process.