第二代抗组胺药西替利嗪、非索非那定、氯雷他定和地氯雷他定,优于第一代抗组胺药,可以避免镇静和抗胆碱能效应。局部过敏症状,例如眼痒,用口服或结合鼻内给药,或滴眼经常有效。抗组胺药点眼优于全身用药,作用更快,缓解最佳,作用长于其他种类药物,如缩血管药、纯肥大细胞稳定剂、非甾体类抗炎药和皮质类固醇等。缓解过敏性结膜炎,奥洛他定和依美斯汀效果较好。 The second-generation antihistamines, cetirizine, fexofenadine, loratadine and desloratadine, are superior to the first-generation antihistamines in avoiding sedation and anticholinergic effects. Local allergy symptoms such as itchy eyes, oral administration or intranasal administration, or eye drops are often effective. Antihistamine ophthalmic eye superior to systemic medication, faster, to alleviate the best, longer than other types of drugs, such as vasoconstrictors, pure mast cell stabilizers, non-steroidal anti-inflammatory drugs and corticosteroids. Relieve allergic conjunctivitis, olopatadine and emamectin works better.