A Patient with Corneal Epithelial Disorder That Developed after Administration of a Latanoprost Generic, but Not a Brand-Name Drug, Eye Drop

Table 1

Differences between Latanoprost eye drops (Kaken pharmaceutical Co., Ltd.) and Xalatan eye drops.

	Latanoprost eye drops	Xalatan eye drops
Additives	Benzalkonium chloride additive (concentration not open to the public)	Benzalkonium chloride additive (0.02%)
	Polyethylene glycol monostearate	Isotonizing agent
	Polyoxyl 40 stearate	Dibasic sodium phosphate hydrate
	Isotonizing agent	Sodium dihydrogen phosphate anhydrous
	Dibasic sodium phosphate hydrate
	Sodium dihydrogen phosphate anhydrous
Osmotic pressure ratio	0.9–1.0	1.0
Storage	Room temperature storage/protection from light	2–8°C/protection from light