Patanol 0.1% Eye Drops is a sterile ophthalmic solution containing Olopatadine
an antihistamine that reduces the natural chemical histamine in the body. Histamine can produce symptoms of itching or watery eyes. Olopatadine is a relatively selective H1-receptor antagonist and inhibitor of histamine release from the mast cell for topical administration to the eyes.
 
Treats watery eyes
Relieves redness
Relieves burning and itching in the eyes