Topical ophthalmic anti-allergy drugs are identified by the extent of their interaction with a phospholipid model membrane. Disclosed are topically administrable ophthalmic formulations containing amphipathic anti-allergy compounds at concentrations such that the drugs have Surface Activity Ratings from about 2-11. Provided the drug is not selected from the group consisting of olopatadine; ketotifen; emedastine; pheniramine; pyrilamine; cromolyn; nedocromil; and levocabastine.