- Which organization is primarily responsible for creating and promoting the list of recommended look-alike/sound-alike drug names that should use Tall Man lettering?
Answer: The Institute for Safe Medication Practices (ISMP)
The Institute for Safe Medication Practices (ISMP), a non-profit organization focused on preventing medication errors, develops and maintains the official list of LASA drug names for which Tall Man lettering is recommended. While the FDA works with and supports the ISMP's efforts, the ISMP is the primary source for these safety standards. The DEA (A) regulates controlled substances, and the BOP (D) regulates pharmacy practice at the state level.
- A technician sees a handwritten order for "MS 10 mg." This abbreviation is considered dangerous and should be clarified because it could be misinterpreted as morphine sulfate or which other medication?
Answer: Magnesium Sulfate
The abbreviation "MS" is on the ISMP "Do Not Use" list because it has been dangerously confused for both Morphine Sulfate and Magnesium Sulfate. A mix-up between these two high-alert drugs can be fatal. Any prescription with this abbreviation requires immediate clarification with the prescriber before it is processed. The other options are not common misinterpretations.
- Besides storing look-alike/sound-alike drugs in completely different locations, which of the following is an effective strategy to reduce selection errors at the shelf?
Answer: Using bold-colored shelf-talkers or warning labels.
Using auxiliary warnings such as brightly colored labels, stickers, or shelf-talkers that state "Look-Alike Drug" serves as a visual reminder to staff to be extra vigilant when selecting the medication. This strategy complements physical separation and Tall Man lettering. Storing alphabetically (A) is often the source of the problem. Storing by movement speed (C) or keeping strengths together (D) are inventory strategies that don't specifically address the LASA risk.
- A pharmacy is implementing Tall Man lettering for its stock of look-alike/sound-alike medications. Which of the following is the correct application of this technique according to ISMP standards?
Answer: hydrOXYzine and hydrALAZINE
The correct application of Tall Man lettering, as recommended by the Institute for Safe Medication Practices (ISMP), emphasizes the parts of the drug names that are different. For hydralazine and hydroxyzine, the correct format is hydrALAZINE and hydrOXYzine. The other options use capitalization incorrectly, which would not be effective at preventing confusion.
- To minimize the risk of a dispensing error involving these two medications, which of the following combinations of strategies would be most effective?
Answer: Using Tall Man lettering (hydrALAZINE / hydrOXYzine) on the labels and storing them in separate, non-adjacent locations.
The most effective approach to preventing errors with LASA drugs is to use multiple, layered safety strategies. Combining a visual aid like Tall Man lettering with a physical safeguard like inventory separation addresses the risk at different points. Storing them together (A) is dangerous. Relying on a single person's check (C) is not a robust system. Hiding one bottle behind another (D) is not a reliable method of separation.
- A technician is using a handheld scanner to verify a medication during the filling process, but the barcode on the bottle is damaged and will not scan. What is the safest next step?
Answer: Find another bottle of the same medication with a scannable barcode.
The purpose of barcode scanning is to provide an automated, electronic verification that the correct product was selected. Bypassing this system introduces risk. The safest course of action is to locate another stock bottle of the identical medication that has a working barcode. This preserves the integrity of the safety check. Manually typing the NDC (A) is prone to transcription errors, and asking for an override (C) should be a last resort after all other options are exhausted.
- To comply with the Drug Supply Chain Security Act (DSCSA) and enhance medication safety, modern 2D barcodes on medication packages typically encode the NDC number, lot number, a unique serial number, and which other piece of information?
Answer: Expiration date
Modern 2D barcodes are designed to carry more information than traditional linear barcodes. For DSCSA compliance, the four key data elements encoded on a package are the National Drug Code (NDC), a unique serial number, the lot number, and the expiration date. This information is critical for tracking, tracing, and verifying medications throughout the supply chain and for managing expired stock.
- A prescription for a liquid medication is written with the quantity "30 cc." To prevent errors, how should the pharmacy technician enter this into the pharmacy computer system?
Answer: 30 mL
The abbreviation "cc" (cubic centimeter) is on the ISMP "Do Not Use" list because it can be poorly written and easily mistaken for "U" (units). The proper and unambiguous unit for liquid volume is milliliters (mL). Since 1 cc is equivalent to 1 mL, the correct and safe way to enter the quantity is as 30 mL. Continuing to use "cc" (D) perpetuates a risky practice. Grams (g) and micrograms (mcg) are units of mass, not volume.
- Which of the following dose notations is most likely to lead to a medication error due to the use of a trailing zero?
Answer: 5.0 mg
A trailing zero (e.g., 5.0 mg) is considered an error-prone practice because the decimal point can be easily missed, causing the dose to be misread as 50 mg—a tenfold overdose. The ISMP recommends never using a trailing zero for doses expressed as whole numbers. In contrast, a leading zero (0.5 mg) is a safety feature, and its absence (.5 mg) is also considered error-prone.
- A pharmacy technician receives a prescription with the sig "Inject 10 U of insulin daily." According to the ISMP "Do Not Use" list, what is the safest way to interpret and enter this instruction?
Answer: Enter the instruction as "Inject 10 units of insulin daily."
The abbreviation "U" for units is on the ISMP's list of error-prone abbreviations because it can be easily mistaken for a zero ('0'), a four ('4'), or 'cc'. The safest practice is to always write out the word "units" in full. While clarification with the prescriber is ideal, the correct way to document it is by spelling out the word. Assuming it means mL (D) would be a dangerous error, and relying on the patient's memory (C) is not a reliable safety check for transcription.
- A prescription is written for "Lisinopril 10 mg PO Q.D." Why is the abbreviation "Q.D." considered error-prone?
Answer: It can be mistaken for "Q.I.D." (four times a day).
The abbreviation "Q.D." (once daily) is on the ISMP "Do Not Use" list because it can be easily misread as "Q.I.D." (four times daily), especially if the period after the 'Q' is mistaken for an 'I'. It can also be confused with "Q.O.D." (every other day). To avoid a potentially significant dosing error, the instruction should be written out as "daily" or "once daily".
- Why is it a critical safety practice to always use a leading zero before a decimal point for doses less than one (e.g., "0.5 mg")?
Answer: It prevents the dose from being misread as a whole number.
The absence of a leading zero (e.g., writing ".5 mg") makes the decimal point easy to miss, which can lead to the dose being interpreted as 5 mg—a tenfold overdose. By always placing a zero before the decimal point for doses less than one, the decimal is emphasized, significantly reducing the risk of such an error. This is a widely accepted safety standard promoted by ISMP, not a specific federal law (A), and it is not related to calculations (C) or administration routes (D).
- When a patient arrives to pick up a completed prescription, what is the most critical final verification step to prevent a medication error?
Answer: Asking the patient to state their full name and date of birth.
To prevent giving the correct medication to the wrong patient, the best practice is to use at least two patient identifiers. The technician should ask the patient to actively state their full name and date of birth. This information is then matched against the prescription label. Simply asking "Are you John Smith?" is less safe, as a patient might be distracted and agree incorrectly. Signing a log (A), counting prescriptions (B), or scanning a receipt (C) are process steps but do not confirm the patient's identity.
- Which of the following best describes the primary purpose of using Tall Man lettering in a pharmacy setting?
Answer: To reduce medication errors between look-alike/sound-alike drug names.
The primary purpose of Tall Man lettering is to draw attention to the dissimilarities in drug names that look or sound alike, such as hydrOXYzine and hydrALAZINE. This practice helps pharmacy staff distinguish between them, reducing the risk of selecting the wrong medication. It is not used for dosage (A), controlled substance status (C), or as a universal FDA labeling requirement (D), although the FDA does support its use as a safety measure.
- A pharmacy technician is stocking a new shipment of medications and notices that the shelf labels for bupropion and buspirone are located next to each other. What is the most appropriate action to take?
Answer: Inform the pharmacist and recommend separating the storage locations of these drugs.
Bupropion and buspirone are a well-known look-alike/sound-alike (LASA) pair. Storing them next to each other alphabetically increases the risk of a mix-up. The most appropriate and effective action is to alert the pharmacist to the risk and recommend physically separating their storage locations. Warning stickers and Tall Man lettering are useful auxiliary strategies, but physical separation is the most robust intervention.
- What is the most effective strategy for arranging look-alike/sound-alike (LASA) medications on pharmacy shelves to prevent dispensing errors?
Answer: Store them in different, non-adjacent locations within the pharmacy.
The most effective way to prevent mix-ups between LASA medications is to physically separate them on the shelves (e.g., storing one in the 'A' section and the other in the 'Z' section, or on completely different rows). Storing them next to each other (A) increases the risk of a selection error. While colored bins (C) can be a helpful secondary strategy, physical separation is the primary recommendation. Separating brand from generic (D) is a general stocking strategy, not one specific to mitigating LASA risks.
- A pharmacy stores concentrated electrolytes, such as potassium chloride for injection, separately from other medications in a locked cabinet. This is an example of which error-prevention strategy?
Answer: Separating inventory of high-alert medications
Concentrated electrolytes are considered high-alert medications due to the risk of severe patient harm if administered incorrectly. A key safety strategy, advocated by organizations like the ISMP, is to segregate these medications from other stock to prevent inadvertent selection and administration. This practice is distinct from controlled substance regulations (C), barcode scanning (A), or recall procedures (D).
- Which of the following pairs of drug names is an appropriate candidate for using Tall Man lettering as an error-prevention strategy?
Answer: Lamotrigine and Lamivudine
Lamotrigine and Lamivudine are a classic look-alike/sound-alike pair that have been involved in harmful medication errors. The ISMP recommends using Tall Man lettering (lamoTRIgine / lamiVUDine) to help differentiate them. The other pairs do not have the same level of orthographic or phonetic similarity and are not on the standard ISMP list for Tall Man lettering.
- During the prescription filling process, what is the primary safety check accomplished by scanning the barcode on the manufacturer's stock bottle?
Answer: It matches the drug's NDC number to the one selected for the prescription.
The primary safety function of barcode scanning during filling is to verify that the National Drug Code (NDC) on the stock bottle matches the NDC for the drug entered in the pharmacy system for that prescription. This ensures the correct medication, strength, and dosage form are being dispensed. While some modern barcodes contain expiration date (B) and lot number (D), the fundamental safety check is the NDC match. Cost (A) is a billing, not a clinical safety, function.
- At which point in the medication-use process does bar code scanning provide a critical verification step to prevent a dispensing error in a community pharmacy?
Answer: When selecting the stock bottle from the shelf to fill the prescription.
In the prescription filling workflow, scanning the barcode on the stock bottle when it is selected from the shelf provides an electronic verification against the prescription being processed. This is a critical step to ensure the correct drug, strength, and formulation was chosen before the medication is counted and dispensed, thereby preventing wrong-drug errors. The other steps are important parts of the overall process but do not involve this specific safety check.
