This document discusses various ophthalmic, nasal, and otic dosage forms. Ophthalmic preparations include solutions, suspensions, ointments, and intraocular injections. Key considerations for aqueous ocular formulations include the drug salt, physical properties, pH, chemical stability, absorption, vehicle, viscosity, preservatives, and antioxidants. Ophthalmic ointments use bases like hydrocarbons or water-soluble bases. Nasal formulations are typically aqueous based and consider pH, tonicity, viscosity, and preservatives. Otic formulations may be aqueous or non-aqueous, using vehicles like water, mineral oils, or glycerol.