Ketotifen, sold under the brand name Zaditor among others, is a second-generation noncompetitive H1-antihistamine and mast cell stabilizer. It is most commonly sold as a salt with fumaric acid, ketotifen fumarate, and is available in two forms. In its ophthalmic form, it is used to treat allergic conjunctivitis... Wikipedia

Manufacturer's Website: Zaditor                                                                                                                   Average retail cost: $16/dropper

Lodoxamide is an antiallergic pharmaceutical drug. It is marketed under the tradename Alomide in the UK...Wikipedia

Manufacturer's Website: Alomide                                                                                                                   Average retail cost: $212/dropper

Nedocromil sodium is a medication considered as mast cell stabilizer...Wikipedia

Manufacturer's Website: Alocril                                                                                                                   Average retail cost: $240/dropper

Alcaftadine is used to prevent eye irritation brought on by allergic conjunctivitis. It is a H1 histamine receptor antagonist... Wikipedia

Manufacturer's Website: Lastacaft                                                                                                                  Average retail cost: $260/dropper

Olopatadine, sold under the brand name Opatanol among others, is a medication used to decrease the symptoms of allergic conjunctivitis and allergic rhinitis (hay fever)... Wikipedia

Manufacturer's Website: Patanol                                                                                                                 Average retail cost: $276/dropper

Bepotastine (Talion, Bepreve) is a 2nd generation antihistamine. It was approved in Japan for use in the treatment of allergic rhinitis and urticaria/pruritus in July 2000 and January 2002, respectively. It is currently marketed in the United States as an eye drop under the brand-name Bepreve...Wikipedia

Manufacturer's Website: Bepreve                                                                                                                              Average retail cost: $296/dropper

Olopatadine, sold under the brand name Opatanol among others, is a medication used to decrease the symptoms of allergic conjunctivitis and allergic rhinitis (hay fever)... Wikipedia

Manufacturer's Website: Not Available                                                                                                                Average retail cost: $443/5 droppers