PTCB Exam PTCE Topic 1 Question 114 Discussion

Comprehensive and Detailed Step-by-Step Explanation:

Cephalexin suspension (Keflex)is anantibioticthat must berefrigerated after reconstitutionanddiscarded after 14 daysto maintain stability and potency.

Explanation of Answer Choices:D. Keep refrigerated; Discard after 14 daysCorrect.Proper storage is2-8C (36-46F), with a 14-day shelf life.A. Protect from light; Discard after 7 days Incorrect.Refrigeration is required, not just light protection.B. Protect from light; Discard after 14 days Incorrect.Light protection is not a major concern for cephalexin.C. Keep refrigerated; Discard after 7 days Incorrect.Cephalexin is stable for 14 days, not just 7.

Reference:

USP <795>: Beyond-Use Dating for Reconstituted Suspensions

FDA Drug Stability Guidelines