Preserved Versus Preservative-Free Latanoprost for the Treatment of Glaucoma and Ocular Hypertension: A Post Hoc Pooled Analysis.

Preservatives in eye drops for glaucoma can cause side effects such as stinging and eye redness. These side effects can cause some patients to reduce the frequency of the drops as prescribed or stop using the drops. One of the most common drops for glaucoma is latanoprost. This study evaluated whether a preservative-free latanoprost (PFL) is as effective as preservative-containing latanoprost (PCL) for reducing eye pressure and whether PFL is better tolerated in patients with glaucoma. The results of the study indicated that PFL was as effective as PCL for reducing eye pressure. The results also indicated PFL was much better at reducing the side effects related to PCL. For example PFL reduces eye redness up to twofold compared to PCL. By reducing the side effects associated with PCL patients may continue to take their glaucoma drops as directed and thereby reduce the risk of vision loss from glaucoma.