Olopatadine hydrochloride is an antihistamine and mast cell stabilizer, sold as a prescription eye drop (0.2% solution, trademark Pataday (or Patanol S in some countries), manufactured by Alcon ). more

Olopatadine hydrochloride is an antihistamine and mast cell stabilizer, sold as a prescription eye drop (0.2% solution, trademark Pataday (or Patanol S in some countries), manufactured by Alcon ). It is used to treat itching associated with allergic conjunctivitis (eye allergies ). Olopatadine hydrochloride 0.1% is sold as trademark Patanol (or Opatanol in some countries). A nasal spray formulation is sold as trademark Patanase , which was approved by the FDA on April 15 , 2008 . [ 1 ] It is also available as an oral tablet in Japan under the tradename Allelock , manufactured by Kyowa Hakko Kogyo. [ 2 ] less