What this quiz covers
This quiz focuses on Drug Disposal, giving you a quick way to practice the rules, question types, and explanations that matter most for NAPLEX.
A 72-year-old woman (weight 60 kg) wants to dispose of several medications after her spouse died and asks about community options. Medical history: type 2 diabetes, osteoarthritis. Allergies: sulfonamides (rash). Current medications: metformin 1,000 mg twice daily, insulin glargine 18 units nightly, acetaminophen 650 mg every 6 hours as needed. She asks if the pharmacy can accept medications for disposal and whether there are local take-back events. Which disposal option is available in the community and aligns with DEA/FDA guidance?
NAPLEX Quiz
Practice Drug Disposal in NAPLEX with focused quiz questions that help you check what you know, review explanations, and build confidence with test-style prompts.
This quiz focuses on Drug Disposal, giving you a quick way to practice the rules, question types, and explanations that matter most for NAPLEX.
Try each quiz question before looking at the correct answer. Use the explanations to review missed ideas, then come back to similar questions until the pattern feels familiar.
A 72-year-old woman (weight 60 kg) wants to dispose of several medications after her spouse died and asks about community options. Medical history: type 2 diabetes, osteoarthritis. Allergies: sulfonamides (rash). Current medications: metformin 1,000 mg twice daily, insulin glargine 18 units nightly, acetaminophen 650 mg every 6 hours as needed. She asks if the pharmacy can accept medications for disposal and whether there are local take-back events. Which disposal option is available in the community and aligns with DEA/FDA guidance?
Explanation: Safe drug disposal through community programs provides the most secure and environmentally responsible method for eliminating unwanted medications while preventing diversion and accidental poisoning. The key factor is identifying legitimate, accessible community disposal options that comply with DEA and FDA regulations for both controlled and non-controlled substances. Bringing medications to DEA-authorized collection receptacles at participating pharmacies, law enforcement sites, or designated take-back events (option A) is correct because these programs are specifically designed for safe medication disposal, accept both controlled and non-controlled substances, and ensure proper destruction. Mailing medications directly to DEA (option B) is incorrect because DEA doesn't accept direct mail from consumers—only authorized mail-back programs with special packaging are permitted. Hospital emergency departments (option C) are not required to accept medications for disposal and this would be an inappropriate use of emergency resources. Placing medications in recycling (option D) is dangerous and incorrect as medications cannot be recycled and would contaminate recycling streams. The clinical pearl is that many retail pharmacies now have permanent DEA-authorized collection kiosks, and communities often hold take-back events twice yearly (typically April and October)—pharmacists should maintain current information about local disposal options to guide patients to the most convenient authorized collection sites.
A 34-year-old man (weight 76 kg) brings in multiple unused medications after cleaning his home and is concerned about environmental impact. Medical history: asthma, seasonal allergies. Allergies: none. Current medications: albuterol inhaler 2 puffs every 4–6 hours as needed; cetirizine 10 mg daily. He has leftover naproxen 500 mg tablets and asks, "Is flushing better than throwing them away to protect the environment?" Which disposal method minimizes environmental impact while maintaining safety?
Explanation: Safe drug disposal practices must balance environmental protection with preventing accidental ingestion and medication diversion, following evidence-based FDA guidelines. The key factor is that naproxen is a non-controlled NSAID without special disposal requirements, making standard disposal methods appropriate while considering environmental impact. Using a drug take-back program when available, or mixing with unpalatable substances for household disposal if not available (option C), is correct because take-back programs prevent both environmental contamination and accidental ingestion, while the household disposal method follows FDA guidelines for non-controlled medications. Flushing naproxen (option A) is incorrect because it's not on the FDA flush list and unnecessarily contributes to pharmaceutical contamination of water systems. Dissolving tablets in water for sink disposal (option B) still introduces the medication into wastewater unnecessarily. Direct disposal in original bottles (option D) is unsafe because it maintains medication in recognizable form, increasing risk of accidental ingestion or diversion. The clinical framework is that environmental protection is best achieved through take-back programs that ensure proper destruction of medications, while household disposal with proper mixing prevents both accidental exposure and minimizes environmental impact compared to flushing—flushing should be reserved only for FDA flush list medications where immediate disposal outweighs environmental concerns.
A 45-year-old woman (weight 70 kg) is 6 days post–knee surgery and has 8 tablets of oxycodone 5 mg remaining; she no longer needs them. Medical history: obstructive sleep apnea, depression. Allergies: codeine (hives). Current medications: acetaminophen 1,000 mg every 8 hours as needed, sertraline 100 mg daily, oxycodone 5 mg every 6 hours as needed (leftover supply). She asks how to safely dispose of the leftover opioid and specifically asks whether flushing is appropriate. How should this controlled substance be disposed of?
Explanation: Safe disposal of controlled substances requires balancing prevention of diversion and misuse with environmental protection, following both DEA regulations and FDA guidelines. The key factor is that oxycodone is a Schedule II controlled substance with high abuse potential and is specifically listed on the FDA flush list for immediate disposal when take-back options are not readily available. Using a DEA-authorized take-back option as first choice, or flushing if no option is readily available (option A), is correct because it follows both DEA requirements for controlled substance disposal and FDA flush list guidance for oxycodone to prevent potentially fatal accidental ingestion or intentional misuse. Giving controlled substances to others (option B) is illegal drug diversion and violates federal law. Storing leftover opioids indefinitely (option C) increases risk of diversion, misuse, and accidental poisoning. Crushing tablets and placing in uncovered trash (option D) is unsafe as it could lead to accidental exposure and doesn't follow proper disposal guidelines. The clinical pearl is that controlled substances should always be disposed of through DEA-authorized take-back programs when possible, but medications on the FDA flush list (including oxycodone, fentanyl, and other high-risk opioids) can be flushed immediately if take-back is not readily available to prevent life-threatening consequences of accidental or intentional ingestion.
A 67-year-old man (weight 84 kg) had his cardiologist discontinue lisinopril 20 mg daily due to cough and start losartan 50 mg daily. Medical history: heart failure with reduced ejection fraction, hypertension, chronic kidney disease stage 3. Allergies: none. Current medications: losartan 50 mg daily, metoprolol succinate 100 mg daily, furosemide 40 mg daily, atorvastatin 40 mg nightly. He has a half-full bottle of lisinopril and asks if flushing it is preferred to keep it out of the water supply. What is the recommended disposal method for this medication?
Explanation: Safe drug disposal practices prioritize preventing medication diversion and environmental contamination while ensuring medications cannot be accidentally ingested by children, pets, or others. The key factor here is that lisinopril is a non-controlled cardiovascular medication without special disposal requirements, making take-back programs the preferred option when available. Using a drug take-back option or, if unavailable, mixing with an unpalatable substance in sealed container for household disposal (option C) is correct because it follows FDA guidelines for non-controlled medications and prevents both accidental ingestion and environmental contamination. Flushing cardiovascular medications (option A) is incorrect because lisinopril is not on the FDA flush list—only specific high-risk medications warrant flushing. Mailing medications back to manufacturers (option B) is not a standard disposal practice and manufacturers don't accept returns for disposal. Crushing tablets and sprinkling in soil (option D) is dangerous as it directly contaminates the environment and could harm wildlife or pets. The clinical framework is that take-back programs are always the first choice for any medication disposal, with household trash disposal (after mixing with unpalatable substances) as the alternative for non-controlled medications, while flushing is reserved only for medications specifically listed on the FDA flush list to prevent life-threatening accidental exposures.
A 67-year-old man (82 kg) had his cardiologist discontinue lisinopril 20 mg by mouth daily due to cough and start losartan 50 mg by mouth daily; his current medications are losartan 50 mg daily, atorvastatin 40 mg nightly, and aspirin 81 mg daily. Medical conditions include hypertension, hyperlipidemia; allergies: none. He has a half-full bottle of lisinopril and asks whether he can donate it to a neighbor or throw it in the recycling bin. What is the recommended disposal method for this medication?
Explanation: Safe drug disposal practices aim to reduce medication diversion, accidental poisoning, and environmental pollution through authorized collection methods. The key patient-specific factor is the discontinuation of lisinopril due to side effects, leaving unused noncontrolled medication without risk of abuse. Option A is the best choice as it directs to a pharmacy or take-back program, which is the preferred method for secure and environmentally sound disposal of unused medications. Option B is incorrect because donating medications is illegal and risks improper use or expired efficacy; option C is suboptimal as recycling bins are not equipped for medications and could lead to contamination; option D is wrong since lisinopril is not on the FDA flush list and crushing/flushing is unnecessary. A common misconception is that unused meds can be shared, but this violates laws and safety standards. Pharmacists should educate on never redistributing prescriptions to prevent harm. For noncontrolled meds, prioritize take-back sites, or if unavailable, mix with unpalatable substances in sealed containers for trash to minimize landfill impact.
A 52-year-old man (88 kg) asks about a local drug take-back event because he recently cleaned out his medicine cabinet. Current medications: insulin glargine 20 units subcutaneously nightly, lisinopril 20 mg daily, and gabapentin 300 mg three times daily; conditions include type 2 diabetes with neuropathy and hypertension; allergies: none. He asks whether he can drop off medications at the police station any day or only during special events. Which disposal option is available in the community?
Explanation: Safe drug disposal practices leverage community resources for secure medication collection to prevent diversion. The key patient-specific factor is the patient's inquiry about dropping off at police stations versus events for old medications. Option A is the best choice as it specifies DEA-authorized sites or events for ongoing or scheduled access. Option B is incorrect as not all clinics accept; option C is suboptimal as mail boxes are not for meds; option D is wrong as prescribers are not required. A common misconception is universal acceptance, but authorization is key. Guide to DEA locator tools. Framework: Use authorized collectors for convenience, enhancing community safety and environmental stewardship.
A 58-year-old man (weight 86 kg) has a partially used fentanyl transdermal patch 25 mcg/hour that was discontinued due to dizziness; a new non-opioid regimen was started. Medical history: chronic pain, chronic obstructive pulmonary disease. Allergies: none. Current medications: gabapentin 300 mg three times daily, acetaminophen 650 mg every 6 hours as needed, tiotropium inhaler 2 puffs daily. He asks whether he should throw the patch in the trash to keep it out of the water system and asks specifically about flushing. How should this controlled substance be disposed of?
Explanation: Safe disposal of transdermal fentanyl patches requires special consideration due to significant residual drug content and extreme potency, with even used patches containing enough fentanyl to cause fatal overdose. The key factor is that fentanyl patches are specifically included on the FDA flush list due to their extreme danger from accidental exposure, making immediate flushing an acceptable disposal method when take-back is not readily available. Folding the patch adhesive-to-adhesive and flushing (option A) is correct because fentanyl patches are explicitly on the FDA flush list, and this method immediately removes the extreme overdose risk while preventing patch reuse or accidental exposure. Cutting patches into pieces (option B) is dangerous as it could release fentanyl and doesn't follow proper disposal guidelines. Storing used patches (option C) creates unnecessary risk of accidental exposure or diversion. Attempting to extract drug from patches (option D) is extremely dangerous and could lead to fatal exposure. The clinical pearl is that fentanyl patches retain significant drug even after use (up to 50% or more), making them uniquely dangerous—the FDA flush list specifically includes fentanyl patches because the risk of fatal accidental exposure outweighs environmental concerns, though DEA-authorized take-back remains the preferred option when readily accessible.
A 40-year-old man (weight 80 kg) is being treated for acute back pain and has leftover hydrocodone/acetaminophen 5 mg/325 mg tablets after improvement. Medical history: anxiety. Allergies: none. Current medications: naproxen 250 mg twice daily as needed, hydroxyzine 25 mg at bedtime as needed, hydrocodone/acetaminophen 1 tablet every 6 hours as needed (leftover). He asks if he can throw the tablets into the trash "as is" because he does not have time to find a take-back location. How should this controlled substance be disposed of?
Explanation: Safe disposal of controlled substances containing opioids requires following DEA regulations while preventing diversion, misuse, and accidental poisoning, with specific considerations for combination products. The key factor is that hydrocodone/acetaminophen is a Schedule II controlled substance requiring DEA-compliant disposal methods to prevent diversion and potentially fatal accidental ingestion. Using a DEA-authorized take-back option as first choice, or mixing with unpalatable substances for household disposal if take-back is not readily available (option B) is correct because it follows DEA regulations for controlled substance disposal while preventing both diversion and accidental exposure through proper concealment. Direct disposal in original containers (option A) is dangerous because it maintains pills in identifiable form, increasing risk of diversion or accidental ingestion. Sharing controlled substances (option C) is illegal drug diversion regardless of intent. Crushing and flushing (option D) is incorrect—while hydrocodone is on the FDA flush list, the recommended method is flushing intact tablets, not crushed powder, and take-back remains the preferred option. The clinical pearl is that for controlled substances not immediately accessible to DEA-authorized take-back, the FDA recommends either flushing (if on flush list) OR the household trash method with mixing—both are acceptable, but mixing with unpalatable substances provides an alternative for those concerned about flushing, while still meeting safety objectives.
A 69-year-old man (86 kg) had his physician discontinue clopidogrel 75 mg by mouth daily after completing therapy; current medications include aspirin 81 mg daily, metoprolol tartrate 25 mg twice daily, and atorvastatin 80 mg nightly. Conditions include coronary artery disease; allergies: none. He asks if he can throw the discontinued clopidogrel into the bathroom trash as-is. What is the pharmacist's recommendation for safe disposal?
Explanation: Safe drug disposal practices for noncontrolled meds like clopidogrel focus on preventing diversion without flushing. The key patient-specific factor is the discontinued clopidogrel, with as-is trash question. Option B is the best choice as take-back or mixing with label removal secures disposal. Option A is incorrect without mixing; option C is suboptimal as not flush-listed; option D is wrong as giving is illegal. A common misconception is noncontrolled are low-risk, but secure methods apply. Advise no-sharing. Framework: Prioritize take-back, mix for trash, ensuring safety and eco-awareness.
A 48-year-old man (92 kg) has an expired bottle of cephalexin 500 mg capsules from a prior skin infection; current medications include hydrochlorothiazide 25 mg by mouth daily and metformin 500 mg by mouth twice daily. Conditions include hypertension and type 2 diabetes; allergies: none. He asks if he can dispose of the antibiotic by pouring the capsules into the toilet tank so they "dissolve slowly." What is the recommended disposal method for this medication?
Explanation: Safe drug disposal practices for antibiotics discourage unconventional methods like toilet tank placement. The key patient-specific factor is the expired cephalexin capsules, with patient's dissolving idea. Option A is the best choice as take-back or mixing for trash is standard and safe. Option B is incorrect as tank dissolving risks plumbing; option C is suboptimal for non-listed meds; option D is wrong as pet mixing endangers animals. A common misconception is slow dissolving is safe, but it contaminates. Counsel proper methods. Framework: Prefer take-back, mix intact for trash, promoting eco-safety.
A 19-year-old woman (54 kg) brings in an unused tube of mupirocin 2% ointment that is not expired but no longer needed; current medications include norethindrone 0.35 mg by mouth daily. Conditions include none; allergies: none. She asks if she should squeeze the ointment into the toilet and recycle the tube. What is the pharmacist's recommendation for safe disposal?
Explanation: Safe drug disposal practices for topicals avoid flushing to prevent water system entry. The key patient-specific factor is the unused mupirocin ointment, with patient idea to squeeze into toilet. Option B is the best choice as take-back or closed-tube trashing with label removal is secure and eco-friendly. Option A is incorrect as flushing topicals pollutes; option C is suboptimal for dilution; option D is wrong as storage risks misuse. A common misconception is topicals are flushable, but they are not. Advise intact disposal. Framework: Take-back for topicals, then sealed trash, ensuring safety and environmental care.
A 50-year-old man (95 kg) is interested in disposing of old medications and asks about community options. Current medications include semaglutide 1 mg subcutaneously weekly, atorvastatin 20 mg nightly, and losartan 100 mg daily; conditions include type 2 diabetes, hyperlipidemia, hypertension; allergies: none. He asks if pharmacies are allowed to maintain secure drop boxes for household medications. Which disposal option is available in the community?
Explanation: Safe drug disposal practices include community options like pharmacy drop boxes if authorized. The key patient-specific factor is the inquiry about secure drop boxes at pharmacies for old meds. Option A is the best choice as it accurately describes DEA-authorized pharmacy receptacles or events. Option B is incorrect as not all must accept; option C is suboptimal for public trash; option D is wrong as wholesalers do not handle patient returns. A common misconception is mandatory acceptance, but it's voluntary. Guide to authorized sites. Framework: Leverage community collectors for accessibility and environmental benefits.
A 33-year-old woman (63 kg) has an expired bottle of ciprofloxacin 500 mg tablets from a prior urinary tract infection; current medications include nitrofurantoin 100 mg by mouth after intercourse as needed and a multivitamin daily. Conditions include recurrent urinary tract infections; allergies: none. She asks if she can crush the tablets and flush them to prevent someone from retrieving them. What is the pharmacist's recommendation for safe disposal?
Explanation: Safe drug disposal practices for antibiotics involve intact handling to avoid exposure during crushing. The key patient-specific factor is the expired ciprofloxacin, with patient's crushing-flushing idea. Option B is the best choice as take-back or intact mixing for trash prevents retrieval without contamination. Option A is incorrect as crushing-flushing is not recommended; option C is suboptimal for sinking; option D is wrong as saving promotes resistance. A common misconception is crushing deters all, but intact is safer. Counsel on resistance. Framework: Take-back or sealed intact trash for antibiotics, eco-safely.
A 45-year-old woman (68 kg) is 5 days post–dental surgery and has 8 tablets left of oxycodone 5 mg/acetaminophen 325 mg; her current medications are ibuprofen 400 mg by mouth every 6 hours as needed and omeprazole 20 mg daily. Medical conditions include gastroesophageal reflux disease; allergies: codeine (rash). She asks how to safely dispose of the leftover opioid because her teenager has friends over frequently. How should this controlled substance be disposed of?
Explanation: Safe drug disposal practices focus on mitigating risks of opioid diversion and overdose, especially in households with vulnerable individuals. The key patient-specific factor is the presence of a teenager with frequent friends, heightening diversion potential for leftover oxycodone. Option B is the best choice because take-back programs or DEA-authorized collectors provide secure disposal for controlled substances, reducing community harm. Option A is incorrect as indefinite storage increases access risks; option C is suboptimal without mixing or sealing, allowing easy retrieval; option D is wrong as pouring into drains contaminates water and is not recommended unless on the flush list. A common misconception is that all opioids must be flushed, but take-back is preferred to avoid environmental issues. Counsel patients on the dangers of keeping unused opioids. A disposal framework emphasizes take-back for controlled substances, with flushing only for FDA-listed items if no take-back is available, promoting both safety and ecological responsibility.
A 40-year-old woman (64 kg) has an unopened tube of triamcinolone 0.1% cream that she no longer needs after her dermatitis resolved; her current medications are levothyroxine 75 mcg by mouth daily and albuterol inhaler 2 puffs every 4 to 6 hours as needed. Medical conditions include hypothyroidism and asthma; allergies: none. She asks whether she can pour the cream into the sink or if it must be treated like hazardous waste. What is the pharmacist's recommendation for safe disposal?
Explanation: Safe drug disposal practices for topical products involve avoiding water systems to prevent contamination while ensuring inaccessibility. The key patient-specific factor is the unopened tube of triamcinolone cream, a noncontrolled medication no longer needed. Option A is the best choice as it recommends trashing the intact tube after label removal if no take-back, minimizing environmental and access risks. Option B is incorrect as squeezing into sinks can cause plumbing issues and pollution; option C is suboptimal because topicals are not flush-listed; option D is wrong as sharps containers are for injectables. A common misconception is that rinsing topicals is safe, but it contributes to water residues. Advise keeping containers closed for disposal. For topicals, prioritize take-back, then secure trashing to balance safety and eco-friendliness.
A 72-year-old woman (60 kg) asks about disposing of medications after seeing a flyer for a community drug take-back event. Her current medications include metformin 1000 mg by mouth twice daily, amlodipine 5 mg by mouth daily, and calcium carbonate 500 mg by mouth daily; conditions include type 2 diabetes and hypertension; allergies: sulfonamides (hives). She has several expired noncontrolled tablets at home and asks which disposal option is available in the community and appropriate. Which disposal option is available in the community?
Explanation: Safe drug disposal practices promote community-based options to ensure secure and compliant handling of unused medications. The key patient-specific factor is the patient's awareness of a community take-back event and possession of expired noncontrolled tablets. Option A is the best choice as DEA-authorized sites or events provide accessible, no-cost disposal without environmental harm. Option B is incorrect because pharmacies are not legally required to provide mailers; option C is suboptimal as sharps containers are for needles, not tablets; option D is wrong as recycling programs do not accept medications. A common misconception is that all facilities must accept returns, but only authorized ones do. Inform patients about locating sites via DEA or local resources. A framework includes using take-back events for convenience, falling back to in-home methods like mixing with deterrents for trash if needed, to foster community safety and environmental protection.
A 31-year-old man (74 kg) has 6 tablets left of hydrocodone 5 mg/acetaminophen 325 mg after an emergency department visit for a kidney stone; current medications include tamsulosin 0.4 mg by mouth daily and ondansetron 4 mg by mouth every 8 hours as needed. Conditions include nephrolithiasis; allergies: none. He lives in a rural area and says there is no take-back site nearby; he asks if flushing is appropriate. How should this controlled substance be disposed of?
Explanation: Safe drug disposal practices for controlled substances prioritize take-back but allow flushing for flush-listed items in remote areas. The key patient-specific factor is the rural location without nearby take-back for leftover hydrocodone, which is flush-listed. Option A is the best choice as it guides checking the flush list and flushing if applicable when take-back is unavailable. Option B is incorrect as loose trash increases diversion; option C is suboptimal for septic systems; option D is wrong as saving risks abuse. A common misconception is flushing avoids all contamination, but it's a last resort. Advise immediate disposal. Framework: Take-back first, flush if listed and needed, or mix for trash to ensure safety and minimal environmental harm.
A 27-year-old woman (62 kg) has an expired bottle of azithromycin 250 mg tablets from a prior bronchitis episode; current medications include prenatal vitamin daily and doxylamine/pyridoxine as needed for nausea. Conditions include pregnancy (10 weeks); allergies: none. She asks if she can dispose of the antibiotic by flushing because she is worried about a dog getting into the trash. What is the pharmacist's recommendation for safe disposal?
Explanation: Safe drug disposal practices for antibiotics avoid flushing to prevent water contamination and resistance spread. The key patient-specific factor is the pregnant patient with a dog, concerned about trash access to expired azithromycin. Option B is the best choice as mixing with deterrents in sealed trash secures against pets if no take-back. Option A is incorrect as flushing is not for antibiotics; option C is suboptimal without dilution efficacy; option D is wrong as it risks improper handling. A common misconception is flushing protects pets, but trash mixing is safer. Counsel on pet-proofing. For antibiotics, take-back or sealed mixing promotes eco-conscious safety.
A 34-year-old woman (70 kg) brings in an opened bottle of amoxicillin 500 mg capsules that expired 8 months ago after treatment for sinusitis; her current medications are sertraline 50 mg by mouth daily and ethinyl estradiol/levonorgestrel 1 tablet by mouth daily. Her medical conditions include major depressive disorder; allergies: none. She asks if she should flush the expired antibiotic or throw it in the trash because she has a toddler at home. What is the pharmacist's recommendation for safe disposal?
Explanation: Safe drug disposal practices prioritize preventing accidental ingestion, diversion, and environmental harm by preferring take-back programs over flushing or trashing. The key patient-specific factor here is the presence of a toddler at home, increasing the risk of accidental exposure to expired amoxicillin capsules. Option B is the best choice because it recommends mixing intact capsules with an unpalatable substance in a sealed bag for household trash if no take-back is available, minimizing diversion and child access while avoiding flushing which is not indicated for antibiotics. Option A is incorrect as antibiotics like amoxicillin are not on the FDA flush list and flushing can contaminate water; option C is suboptimal because keeping expired antibiotics promotes misuse and resistance; option D is wrong as dissolving in the sink risks plumbing issues and environmental contamination. A common misconception is that flushing all medications is safest, but it should be reserved for specific high-risk drugs. Always counsel patients to remove personal information from containers before disposal to protect privacy. A framework for disposal includes checking for take-back options first, then using the FDA flush list for qualifying controlled substances, or mixing non-flushable meds with deterrents for trash to balance safety and environmental concerns.
A 58-year-old man (90 kg) had his physician discontinue warfarin after switching to apixaban 5 mg by mouth twice daily for atrial fibrillation; current medications include apixaban 5 mg twice daily, metoprolol succinate 50 mg daily, and rosuvastatin 20 mg nightly. Conditions include atrial fibrillation and hyperlipidemia; allergies: none. He asks if he can throw the remaining warfarin tablets into the toilet because he heard blood thinners are dangerous. What is the pharmacist's recommendation for safe disposal?
Explanation: Safe drug disposal practices for high-risk meds like anticoagulants focus on preventing accidental ingestion without unnecessary flushing. The key patient-specific factor is the discontinued warfarin, not on the flush list, with patient concern for danger. Option B is the best choice as it recommends take-back or mixing for trash, balancing safety and environment. Option A is incorrect because warfarin is not flush-listed; option C is suboptimal as sharing is illegal; option D is wrong as scattering risks exposure. A common misconception is that all dangerous meds are flushable, but only specific ones are. Educate on flush list criteria. For non-flush meds, use take-back or deterrent mixing in trash for conscious disposal.