Patent ID: 8399508

Claim:
A method of treating allergic rhinitis comprising topically administering to a patient's nasal cavity an aqueous, nasal spray solution composition formed from ingredients consisting of a) 0.665% (w/v) olopatadine hydrochloride; b) a phosphate salt in an amount equivalent to 0.4-0.6% (w/v) dibasic sodium phosphate, wherein the phosphate salt selected from the group consisting of monobasic sodium phosphate; dibasic sodium phosphate; tribasic sodium phosphate; monobasic potassium phosphate; dibasic potassium phosphate; and tribasic potassium phosphate; c) 0.35-0.45% (w/v) NaCl; d) one or more pH-adjusting agents in an amount sufficient to cause the composition to have a pH of 3.6-3.8, wherein the pH-adjusting agents are selected from the group consisting of HCl and NaOH; e) 0.005-0.015% (w/v) benzalkonium chloride; f) 0.005-0.015% (w/v) edetate disodium; and g) water; wherein the composition has an osmolality of 260-330 mOsm/kg.