Presentation Dexagen C : Each ml sterile eye drops contains Dexamethasone Phosphate 1 mg (as Dexamethasone Sodium Phosphate USP) & Chloramphenicol BP 5 mg. Preservative: Benzalkonium Chloride 0.01% Vehicle: Polyethylene Glycol 400 8% Commercial Pack: Dexagen C : Each plastic dropper bottle containing 5 ml sterile eye drops.