Free PTCB PTCE Practice Exam with Questions & Answers | Set: 2

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A medication'sstabilityrefers tohow well it maintains potency, effectiveness, and safety over time. Several factors candegrade medications, includingoxygen, moisture, temperature, and light.

Oxygen exposurecan causeoxidation, leading to drug degradation and loss of potency.

Many medications, especiallyvitamins (e.g., vitamin C), biologics, and certain antibiotics, are susceptible to oxidative damage.

Medications requiring protection from oxygen are often packaged inair-tight containersorblister packs.

A. Allergies→ Incorrect; allergies affect thepatient, not the drug’sstability.

B. Equivalence→ Incorrect; equivalence refers tobioavailabilitybetween generic and brand-name drugs, not drug stability.

D. Indications→ Incorrect; indications refer toapproved uses of a drug, not factors affecting its stability.

Other Answer Choices Explained:References:

USP <797> and <795> Guidelines on Medication Stability

FDA Drug Stability and Shelf Life Guidelines

PTCB PTCE Exam Content Outline (Medication Storage & Stability)

Comprehensive and Detailed Step-by-Step Explanation:

Stock rotation (First In, First Out - FIFO)ensures thatolder medications are used before newer stock, reducing expired medication dispensing.

????Explanation of Answer Choices:✅C. Rotating stock on a regular basis→Correct.FIFO method reduces waste and errors.❌A. Verifying each lot number→ Incorrect.Lot numbers do not indicate expiration dates.❌B. Using the newest medications first→ Incorrect.Older stock should be used first.❌D. Using the last in, first out method→ Incorrect.Opposite of the correct practice.

????Reference:

USP <1079>: Medication Storage and Inventory Control

PTCB Exam: Inventory Management

Lyrica (pregabalin) is an anticonvulsant that causes drowsiness, dizziness, and sedation.

It is commonly prescribed for nerve pain, epilepsy, and fibromyalgia.

????Reference:FDA Pregabalin Drug Label, PTCE Medication Safety Guide.

Percocet (oxycodone/acetaminophen) and Tylenol (acetaminophen)should be avoided together becauseboth contain acetaminophen.

High doses of acetaminophen (>4,000 mg/day in adults)can causesevere liver toxicity, leading to acute liver failure.

Acetaminophen is metabolized by theliver enzyme CYP2E1, producingtoxic metabolitesthat, in excess, overwhelm the liver’s ability to detoxify them.

Why Other Options Are Incorrect:

Motrin (ibuprofen) + Ativan (lorazepam):No liver toxicity risk.✅

Motrin (ibuprofen) + Tylenol (acetaminophen):Not inherently dangerous but can causeGI bleedingandkidney damagewith long-term use.

Percocet (oxycodone/acetaminophen) + Ativan (lorazepam):Risk ofCNS depression, butnotliver toxicity.

????Reference:FDA Acetaminophen Safety Guidelines,CDC Liver Toxicity Warnings.

To calculate how muchamoxicillin suspensionwill be used in the first5 days, we follow these steps:

Amoxicillin concentration:250 mg per5 mL

Dosage:1 tsp (5 mL) three times daily (tid)

Duration:First5 days

Step 1: Identify Given InformationStep 2: Calculate Total Daily Volume5 mL×3=15 mL per day5 \text{ mL} \times 3 = 15 \text{ mL per day}5 mL×3=15 mL per day

Step 3: Multiply by 5 Days15 mL/day×5 days=75 mL15 \text{ mL/day} \times 5 \text{ days} = 75 \text{ mL}15 mL/day×5 days=75 mL

Thus, the patient will use75 mLof medication in the first5 days.

A. 25 mL→ Incorrect; this would be correct if taken onlyonce dailyinstead ofthree times daily.

B. 50 mL→ Incorrect; this is the correct amount for3.3 days, not 5 days.

D. 150 mL→ Incorrect; this is thefull 10-day course, not just the first 5 days.

Other Answer Choices Explained:References:

PTCB PTCE Exam Content Outline (Pharmaceutical Calculations – Dosage & Volume Calculations)

USP <795> Nonsterile Compounding Guidelines

Lexicomp Drug Monograph for Amoxicillin Suspension

TheFDA classifies recalls into three levels, withClass III being the least severe:

Class I Recall→Most severe→ Issued when a drugmay cause serious harm or death.

Class II Recall→Moderate severity→ The drug may causetemporary or medically reversible adverse effects.

Class III Recall→Least severe→ The productis unlikely to cause harm but violates FDA regulations(e.g., labeling errors, minor packaging issues).

A. Is issued when there is a reasonable probability that the product will cause serious adverse health consequences or death.❌→Incorrect

Describes a Class I recall, not Class III.

B. Is initiated by the FDA if a manufacturer has violated the adulteration provisions of the Food, Drug, and Cosmetic Act (FDCA).❌→Incorrect

FDA action due to adulteration typically leads to Class I or Class II recalls, depending on severity.

C. Occurs when a product may cause temporary or medically reversible adverse health consequences.❌→Incorrect

Describes a Class II recall, not Class III.

FDA Drug Recall Guidelines– Defines Class I, II, and III recalls.

PTCB PTCE Exam Content Outline– Covers recall classifications and pharmacy responsibilities.

FDA Enforcement Report– Lists real-world examples of Class III recalls (e.g.,mislabeling, incorrect expiration dates).

Why Not the Other Options?Key References:

Comprehensive and Detailed Step-by-Step Explanation:

Corticosteroidsare a class of medications used toreduce inflammation.Fluocinoloneis atopical corticosteroidused foreczema, psoriasis, and allergic reactions.

????Explanation of Answer Choices:✅B. Fluocinolone→Correct.Fluocinolone is a corticosteroidused in skin conditions.❌A. Progesterone→ Incorrect.Progesterone is a hormone, not a corticosteroid.❌C. Methyltestosterone→ Incorrect.Methyltestosterone is an androgen (male hormone).❌D. Spironolactone→ Incorrect.Spironolactone is a potassium-sparing diuretic, not a steroid.

????Reference:

FDA Drug Classification Database

USP Drug Information Handbook

Schedule III & IV drugs can be refilled up to 5 times within 6 months from the date written.

After 6 months or 5 refills, a new prescription is required.

????Reference:DEA Controlled Substance Act (21 CFR 1306).

Briviact (brivaracetam) and Vimpat (lacosamide) are both anticonvulsantsused to treat epilepsy.

Therapeutic duplication alertswarn ofmultiple drugs treating the same condition, increasing the risk of side effects.

????Reference:ISMP Medication Safety Guidelines, PTCE Exam Study Guide.

Amlodipine(10 mg) anddiltiazem(30 mg) are bothcalcium channel blockers (CCBs)used to treat hypertension and angina.

When a patient is prescribed two medications from the same therapeutic class, the pharmacy's prescription processing system may flag this as"therapeutic duplication."

This alert is meant toprevent potential adverse effectssuch as excessive lowering of blood pressure or heart rate.

A. Prior authorization required→ Not applicable unless the insurance requires special approval before covering the drug.

C. NDC not covered→ Would appear if the specific drug product (based on its National Drug Code) is not covered by insurance, but this scenario relates to duplication, not coverage.

D. Refill too soon→ This applies to refilling a medication before the allowed time frame, but the scenario describes a new prescription.

PTCB PTCE Exam Content Outline – Drug Interactions and Therapeutic Duplication

Lexicomp and Micromedex Drug Databases– Reference sources for drug classifications.

ISMP Guidelines on Preventing Therapeutic Duplication Errors

Why Other Answers Are Incorrect?Pharmacy Technician References: