A patient would receive an incorrect generic substitution if a pharmacy dispensed:

Rationale

Rivaroxaban for Eliquis would be an incorrect generic substitution.

Rivaroxaban and Eliquis are not interchangeable, as they are distinct medications with different active ingredients and indications. Eliquis (apixaban) is an anticoagulant used to reduce the risk of stroke and blood clots, while rivaroxaban is a different anticoagulant altogether, leading to potential therapeutic inefficacy if substituted.

A (Duloxetine for Cymbalta) YOUR ANSWER

Duloxetine is the generic name for Cymbalta. Therefore, dispensing duloxetine instead of Cymbalta is a correct substitution, as they are the same medication used to treat major depressive disorder and generalized anxiety disorder. This substitution is appropriate and does not affect therapeutic outcomes.

B (Lisinopril for Zestril) YOUR ANSWER

Lisinopril is the generic version of Zestril. Substituting lisinopril for Zestril is valid and acceptable since they contain the same active ingredient, indicated for treating high blood pressure and heart failure. This substitution maintains the intended pharmacological effects.

C (Rivaroxaban for Eliquis) CORRECT

Rivaroxaban is not the same medication as Eliquis, which contains apixaban as its active ingredient. These two drugs serve similar purposes in anticoagulation therapy but are not interchangeable due to differences in their pharmacokinetics and dosing regimens. Using rivaroxaban instead of Eliquis could lead to inadequate anticoagulation and increased risk of adverse events.

D (Finasteride for Proscar) YOUR ANSWER

Finasteride is the generic form of Proscar. The substitution of finasteride for Proscar is appropriate and safe, as both medications are used to treat benign prostatic hyperplasia and contain the same active ingredient. Thus, this substitution is correct and maintains treatment efficacy.

Conclusion

Accurate medication substitution is critical for patient safety and effective treatment. While generic substitutions for duloxetine, lisinopril, and finasteride are acceptable, substituting rivaroxaban for Eliquis is inappropriate due to their differing active ingredients. Recognizing these distinctions is essential in pharmacy practice to avoid therapeutic errors and ensure optimal patient care.

A patient would receive an incorrect generic substitution if a pharmacy dispensed:

Rivaroxaban for Eliquis would be an incorrect generic substitution.

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