Pharmacy Continuing Education (CE) Practice Exam

The choice of preservative-free carboxymethylcellulose 0.5% eye drops is appropriate for a patient experiencing dry eye symptoms because carboxymethylcellulose acts as a lubricant, providing moisture and relief to the surface of the eye. This formulation is designed specifically to alleviate dryness without the potential irritation that preservatives might cause, making it suitable for patients who are sensitive to preservatives or who require frequent dosing throughout the day. By using a preservative-free option, patients can avoid the risk of further irritation or toxicity that can arise from exposure to preservatives like benzalkonium chloride, which while SAMPLEeffective at preventing microbial growth, can also be harsh on the eye, especially in chronic use or in sensitive eyes. Therefore, the choice of preservative-free products in dry eye treatment aligns with best practices aimed at enhancing patient comfort and minimizing side effects.