Different salts, hydrates or solvates of the active ingredients can be used to further adjust the properties of the resulting composition. 4.5.5 Mucosal Dosage Forms Mucosal dosage forms of the invention include, but are not limited to, ophthalmic solutions, sprays and aerosols, or other forms known to one of skill in the art See, e.g., Remington's Pharmaceutical Sciences, 18th eds., Mack Publishi