GAT229 is a CB1 positive allosteric modulator (PAM) that effectively reduces intraocular pressure (IOP) in high IOP mouse models and enhances CB1 receptor-mediated IOP-lowering effects. A 0.2% GAT229 solution or 10 mg/kg of GAT229 alone significantly reduces IOP. GAT229 is promising for research related to glaucoma and elevated intraocular pressure[1].