Patanol (Olopatadine HCl) 0.1% is a prescription eye drop solution manufactured by Alcon. It is an antihistamine medication used to treat itching and allergic symptoms in the eyes, providing relief from allergic conjunctivitis. This 5ml eye drop solution contains Olopatadine hydrochloride as the active ingredient at a 0.1% concentration. Patanol works by blocking histamine receptors to reduce allergy symptoms like itching, redness, and inflammation in the eyes. As this is a prescription medication, it should only be used under the direction of a healthcare provider and according to the prescribed dosage instructions. Store at room temperature away from light and moisture.