Latanoprost
Latanoprost
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Latanoprost

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Latanoprost

Latanoprost, sold under the brand name Xalatan among others, is a medication used to treat increased pressure inside the eye (intraocular pressure). This includes ocular hypertension and open-angle glaucoma. Latanaprost is applied as eye drops to the eyes. Onset of effects is usually within four hours, and they last for up to a day.

Common side effects include blurry vision, redness of the eye, itchiness, and darkening of the iris. Latanoprost is in the prostaglandin analogue family of medications. It works by increasing the outflow of aqueous fluid from the eyes through the uveoscleral tract.

Latanoprost was approved for medical use in the United States and the European Union in 1996. It is on the World Health Organization's List of Essential Medicines. Latanoprost is available as a generic medication. In 2023, it was the 67th most commonly prescribed medication in the United States, with more than 9 million prescriptions. It is available as a fixed-dose combination with netarsudil as netarsudil/latanoprost and with timolol as latanoprost/timolol.

In the United States, latanoprost is indicated for the reduction of elevated intraocular pressure in people with open-angle glaucoma or ocular hypertension.

In people with ocular hypertension (IOP ≥21 mm Hg) including open-angle glaucoma, treatment with latanoprost reduced IOP levels by 22 to 39% over 1 to 12 months' treatment. Latanoprost is more effective than timolol 0.5% twice daily in 3 of 4 large (n = 163 to 267) randomised, double-blind trials. Latanoprost demonstrated a stable long-term IOP-lowering effect in 1- or 2-year continuations of these trials, with no sign of diminishing effect during prolonged treatment.

Meta-analysis suggests that latanoprost is more effective than timolol in lowering intraocular pressure (IOP). However, it often causes iris pigmentation. While current[when?] evidence suggests that this pigmentation is benign, careful lifetime evaluation of patients is still justified.

People who had elevated IOP despite iridotomy and/or iridectomy (including people of Asian descent), latanoprost was significantly more effective than timolol in two double-blind, monotherapy trials (8.2 and 8.8 mm Hg vs 5.2 and 5.7 mm Hg for latanoprost vs timolol at 12 and 2 weeks, respectively).

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