Medium NAPLEX USP 795 Practice Questions

Mastering the standards for non-sterile compounding is a fundamental requirement for any pharmacy graduate preparing for the licensure exam, and these Medium NAPLEX USP 795 Practice Questions are designed to bridge the gap between basic theory and clinical application. USP 795 provides the essential framework for ensuring the quality, safety, and stability of compounded non-sterile preparations (CNSPs). As you prepare for your boards, integrating these concepts with other clinical areas, such as Medium NAPLEX Therapeutics Practice Questions, will help you develop the holistic mindset required for the exam.

Concept Explanation

USP Chapter 795 is the national standard for the compounding of non-sterile preparations to ensure they are safe for patient use and meet specific quality benchmarks. This chapter outlines the minimum requirements for the compounding environment, personnel training, documentation, and the assignment of beyond-use dates (BUDs). Unlike sterile compounding, which focuses on preventing microbial contamination, non-sterile compounding focuses on the accuracy of the formulation and the prevention of cross-contamination. Key components include the Master Formulation Record (the "recipe") and the Compounding Record (the specific log for a single batch). According to the United States Pharmacopeia, the complexity of compounding is categorized into simple, moderate, and complex levels, which dictate the level of expertise and equipment required.

To succeed on the NAPLEX, candidates must memorize the default BUDs for non-sterile preparations when no stability data is available. For a deeper dive into the broader pharmacy curriculum, visit our NAPLEX Prep hub. Additionally, understanding how medications behave in the body, as seen in Medium NAPLEX Renal Therapeutics Practice Questions, is vital when determining if a compounded formulation is appropriate for patients with specific organ impairments.

Solved Examples

1. BUD Assignment for Aqueous Oral Formulations: A pharmacist is asked to compound a 2 mg/mL oral suspension of amlodipine using tablets and a commercially available aqueous vehicle. If the manufacturer of the vehicle does not provide stability data, what is the maximum BUD?
   1. Identify the preparation type: This is an aqueous oral formulation.
   2. Recall the USP 795 standard: For water-containing oral formulations, the BUD is not more than 14 days when stored at controlled cold temperatures.
   3. Final Answer: 14 days (refrigerated).
2. Determining Compounding Complexity: A pharmacist is mixing two commercially available creams to create a 1:1 mixture for a patient with eczema. What is the complexity level of this preparation?
   1. Review the definitions: Simple compounding involves following a manufacturer's instructions or mixing products with known stability.
   2. Analyze the task: Mixing two compatible creams is a straightforward process with no specialized calculations or equipment.
   3. Final Answer: Simple.
3. Calculating Ingredient Quantities: A prescription calls for 60g of a 5% hydrocortisone ointment. The pharmacy has 10% hydrocortisone ointment and white petrolatum. How much of each is needed?
   1. Use the allegation method or the formula $C_1V_1 = C_2V_2$.
   2. $(10\%) \times (X) = (5\%) \times (60g)$.
   3. $10X = 300 \rightarrow X = 30g$ of the 10% ointment.
   4. Subtract from total: $60g - 30g = 30g$ of white petrolatum.
   5. Final Answer: 30g of 10% ointment and 30g of petrolatum.

Practice Questions

1. A pharmacist is compounding a topical gel that contains no water. The ingredients are all pure chemical powders with an expiration date of 2 years from today. According to USP 795, what is the maximum BUD for this non-aqueous formulation?

2. Which document must be created first and serves as the permanent "recipe" for any compounded preparation that is made routinely in the pharmacy?

3. A technician is cleaning the non-sterile compounding area. According to USP 795, how often should the work surfaces be cleaned and sanitized when compounding is actively occurring?

4. A pharmacist compounds an aqueous mucosal liquid for a patient with mouth sores. The preparation is stored at room temperature. What is the maximum BUD for this non-oral aqueous formulation?

5. A pharmacy receives a bulk container of Lactose Monohydrate that does not have an expiration date on the label. According to USP standards, what is the maximum expiration date that can be assigned to this ingredient from the date of receipt?

6. When compounding a moderate-complexity preparation, such as a suppository where the mixing of ingredients requires special calculations, which USP 795 requirement ensures that the process can be replicated exactly by another staff member?

7. A patient is prescribed a compounded progesterone vaginal cream (aqueous). If the preparation is made on January 1st, what is the latest possible BUD if stored in the refrigerator?

8. Which of the following is considered a "Moderate" level of compounding complexity according to USP 795?

9. A pharmacist uses a digital tool to organize compounding logs. During an inspection, the inspector asks for the record that documents the specific weights and lot numbers used for today's batch of Magic Mouthwash. Which document is this?

10. What is the minimum frequency for personnel to undergo competency testing for non-sterile compounding techniques?

Answers & Explanations

1. Answer: 6 months. For non-aqueous formulations (such as a gel made with oils or alcohols but no water), the BUD is not more than 6 months or the earliest expiration date of any API, whichever is earlier.
2. Answer: Master Formulation Record. This is the "template" or recipe. The Compounding Record is the specific log for an individual batch.
3. Answer: At the beginning and end of each shift, and between compounding different preparations. Regular sanitation prevents cross-contamination.
4. Answer: 30 days. For water-containing topical/dermal and mucosal liquid and semisolid formulations, the BUD is 30 days.
5. Answer: 3 years. If a component does not have an expiration date from the manufacturer, USP 795 allows a maximum of 3 years from the date of receipt, provided the quality is maintained.
6. Answer: Master Formulation Record. The MFR provides the detailed instructions necessary for consistency and reproducibility.
7. Answer: January 31st. This is an aqueous mucosal/semisolid preparation (cream), which carries a 30-day BUD, regardless of refrigeration, unless stability data suggests otherwise.
8. Answer: Compounding a preparation that requires special calculations or making a preparation for which stability data is not available. These factors elevate the risk and complexity above the "Simple" level.
9. Answer: Compounding Record. This record is specific to the individual batch and includes the actual weights, components, and personnel involved.
10. Answer: Every 12 months. USP 795 requires that personnel be evaluated at least annually to ensure they maintain proficiency in compounding tasks.

1. What is the maximum BUD for a water-containing oral formulation?

• A7 days
• B14 days
• C30 days
• D6 months

Frequently Asked Questions

What is the difference between USP 795 and USP 797?

USP 795 establishes standards for non-sterile compounding, such as ointments and oral liquids, while USP 797 governs sterile compounding, including IV bags and eye drops. The primary distinction is the requirement for a sterile environment and aseptic technique in USP 797 to prevent microbial contamination.

Can a pharmacist assign a BUD longer than the USP defaults?

Yes, a pharmacist may assign a longer BUD only if there is valid scientific stability data, such as a peer-reviewed study or manufacturer-specific data, that supports the extended date. This documentation must be kept on file in the pharmacy.

What are the storage requirements for aqueous oral suspensions?

According to USP 795, water-containing oral formulations must be stored in a refrigerator (between 2°C and 8°C) to maintain stability and inhibit microbial growth. This is a key factor in the standard 14-day BUD assignment.

Is a dedicated room required for USP 795 compounding?

While a separate room is not strictly required for non-sterile compounding, the area must be specifically designated for compounding and have adequate space to prevent mix-ups and cross-contamination. It must also be away from high-traffic areas and sinks that could cause splashing.

Does USP 795 apply to retail pharmacies?

Yes, USP 795 applies to all healthcare settings where non-sterile compounding is performed, including retail/community pharmacies, hospital pharmacies, and clinics. Compliance is often enforced by state boards of pharmacy and the FDA.

How should hazardous non-sterile compounding be handled?

Compounding non-sterile hazardous drugs must follow both USP 795 for formulation standards and USP 800 for safety and containment. This involves using a Containment Primary Engineering Control (C-PEC) like a specialized hood to protect the staff from exposure.