Adding netarsudil to latanoprost lowers eye pressure faster in Japanese patients with glaucoma

People with primary open-angle glaucoma or ocular hypertension often struggle when one drop does not lower their eye pressure enough. This trial looked at what happens when Japanese participants who had inadequate pressure reduction with latanoprost alone added netarsudil to their routine. The goal was to see if this combination could lower pressure better than just using a placebo drop alongside latanoprost. The study involved 246 people across multiple centers and lasted for four weeks. Results showed the combination was superior at lowering mean diurnal intraocular pressure at week four. The pressure levels were 15.29 versus 17.65 mmHg for the combination versus the control group. Significant reductions also appeared as early as week one and week two. The difference was highly statistically significant with a p value less than 0.0001. Safety data showed that adverse events were reported in 64.8 percent of the combination group versus 21.0 percent in the control group. Conjunctival hyperaemia was the most common side effect. No serious adverse events were reported during the follow-up period. While the combination worked well for lowering pressure, the higher rate of side events suggests patients and doctors must weigh the benefits against the increased likelihood of minor reactions like redness.