Simenepag (AGN-210676) is a a small molecule selective prostaglandin EP2 agonist with EC50 of 5 nM. Allergan was developing simenepag for the treatment of glaucoma and ocular hypertension.

Taprenepag isopropyl (also known as PF-04217329) a prodrug of CP-544326 (active acid metabolite), a potent and selective EP(2) receptor agonist. Taprenepag isopropyl was studied in a clinical trials phase II involving patients with primary open angle glaucoma. According to Pfizer’s pipelines in May 2011, the study was discontinued.

Aganepag isopropyl, an IOP-lowering agent, is an antiglaucoma agent. It is a selective EP2 receptor agonist.

D-cloprostenol, also called (+)-cloprostenol is a highly potent prostaglandin F2-alpha receptor agonist. (+)-Cloprostenol is a 15(R) enantiomer of cloprostenol responsible for the majority of its biological activity and is commonly used in bovine reproduction that increases myometral contractility.

Omidenepag isopropyl, a prodrug, is hydrolyzed in the eye to the active form (Omidenepag) which functions as a selective, nonprostaglandin, prostanoid EP2 agonist, has been developed by Ube Industries and Santen Pharmaceutical as an ophthalmic solution (EYBELIS®) for the treatment of glaucoma and ocular hypertension. Omidenepag isopropyl increases the outfow of aqueous humor via both the uveoscleral outfow and the trabecular outfow pathways, resulting in potent and stable reduction in intraocular pressure (IOP). In September 2018, omidenepag isopropyl ophthalmic solution 0.002% was approved in Japan for the treatment of glaucoma and ocular hypertension. On September 22, 2022, the FDA approved Santen’s Omlonti (omidenepag isopropyl), for the reduction of elevated intraocular pressure in patients with open-angle glaucoma or ocular hypertension.