Formulary And Therapeutic Alternatives - NAPLEX

1. Which is the preferred formulary alternative when a patient has a true IgE penicillin allergy?

   Use a non-beta-lactam or aztreonam when appropriate. True penicillin allergies risk cross-reactivity with beta-lactams, so alternatives like aztreonam or non-beta-lactam classes minimize anaphylaxis risk.

2. Which antiplatelet is a common formulary alternative when ticagrelor is nonformulary and no contraindication exists?

   Clopidogrel. As a P2Y12 inhibitor, it provides similar antiplatelet effects for conditions like ACS, serving as a cost-effective alternative without contraindications.

3. Which formulary design uses tiers to set different patient cost-sharing by drug preference?

   Tiered formulary. Tiers incentivize selection of preferred drugs through lower copays for generics or formulary brands and higher costs for nonpreferred options.

4. Which option is safest when switching between narrow therapeutic index drugs and generics?

   Avoid switching when possible; monitor levels/response closely. NTI drugs have small margins between therapeutic and toxic doses, so minimizing switches and close monitoring prevent variability in response.

5. What is the term for a formulary where nonlisted drugs may be covered with exceptions?

   Open formulary. This flexible design allows coverage for most drugs, including non-preferred ones, often at higher patient cost or with approval processes.

6. Identify the preferred substitution when a drug is nonformulary but an equivalent strength is formulary.

   Therapeutic interchange per protocol to formulary agent. Protocols allow automatic replacement with a therapeutically equivalent formulary drug to maintain efficacy while controlling institutional costs.

7. Which Orange Book rating indicates therapeutic equivalence without known bioequivalence problems?

   AA rating. This rating applies to drugs like solutions where bioequivalence studies are unnecessary, confirming they perform similarly to the reference.

8. What is the best definition of a therapeutic interchange within an institution?

   Authorized substitution to a different drug in same class. Institutions implement this to standardize therapy by switching to an equivalent formulary drug within the same therapeutic class for efficiency.

9. Which statin is a common high-intensity formulary alternative when rosuvastatin is nonformulary?

   Atorvastatin. It offers comparable LDL reduction at high doses, making it an effective substitute for high-intensity statin therapy in lipid management.

10. Which option is the most appropriate formulary alternative to IV therapy when oral bioavailability is high?

    IV-to-PO conversion (use equivalent oral regimen). Switching to oral forms reduces costs and infection risks when drugs have high oral absorption, maintaining equivalent therapeutic effects.

11. What term means a biosimilar can be substituted at the pharmacy level per state law?

    Interchangeable biosimilar. This designation allows automatic pharmacy-level substitution without prescriber intervention, similar to generic drugs, if state laws permit.

12. Which utilization management strategy targets high-cost drugs by requiring clinical review before use?

    Prior authorization. This strategy ensures appropriate utilization of expensive medications through prescriber documentation and payer approval prior to dispensing.

13. Which PPI is a common formulary alternative when esomeprazole is nonformulary and no interaction concerns exist?

    Omeprazole. As a first-generation PPI, it provides equivalent acid suppression for GERD or ulcers, often at lower cost without significant interaction differences.

14. What is the term for a formulary where only listed drugs are covered and others are not?

    Closed formulary. It strictly limits coverage to approved drugs only, encouraging use of cost-effective options and excluding non-listed medications entirely.

15. Which FDA Orange Book rating indicates a generic is therapeutically equivalent and substitutable?

    AB rating. This rating confirms bioequivalence and pharmaceutical equivalence, allowing safe substitution without therapeutic differences.

16. What formulary restriction limits the quantity dispensed within a defined time period?

    Quantity limit. This restriction promotes safe usage and prevents stockpiling or diversion by capping the maximum amount allowable per prescription period.

17. What is the formulary restriction that limits coverage to specific diagnoses or patient criteria?

    Prior authorization. It requires prescriber justification based on specific medical necessity criteria to ensure appropriate and cost-effective use of the medication.

18. Which Orange Book rating indicates a product is not therapeutically equivalent to the reference?

    BX rating. Products with this rating lack sufficient data to prove bioequivalence, making them unsuitable for substitution with the reference drug.

19. Which term describes a drug that is chemically identical to another but marketed under a brand name?

    Branded generic. These are off-patent drugs sold by manufacturers under proprietary names, offering identical active ingredients but branded marketing.

20. Which term describes a follow-on biologic that is highly similar with no clinically meaningful differences?

    Biosimilar. Approval requires demonstration of high similarity in structure, function, and clinical outcomes to the reference biologic product.

21. Which formulary tool requires trying a preferred agent before coverage of a nonpreferred agent?

    Step therapy (fail-first requirement). This approach ensures cost-effectiveness by mandating failure on a less expensive preferred drug before approving a more costly nonpreferred option.

22. What is the best definition of generic substitution in outpatient dispensing?

    Dispense AB-rated generic equivalent for brand. Pharmacies perform this to reduce costs by replacing a brand-name drug with its bioequivalent generic version rated as interchangeable.

23. What formulary restriction limits the number of fills or days supplied within a time window?

    Refill limit (or days-supply limit). It controls chronic use and costs by restricting the total refills or supply duration available over a specified timeframe.

24. Which insulin is a common formulary alternative when insulin glargine U-100 is nonformulary in a hospital?

    Insulin detemir (or institution-preferred basal insulin). Hospitals prefer long-acting analogs like detemir for basal coverage, ensuring similar glycemic control and standardization in inpatient settings.

25. Which option best reduces cost when a brand is nonpreferred but an AB-rated generic exists?

    Generic substitution to AB-rated equivalent. Using an AB-rated generic lowers expenses without compromising efficacy, as it is bioequivalent to the nonpreferred brand-name drug.

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