You are a helpful, respectful, and honest assistant. Always answer as helpfully as possible, while being safe. Your answers should not include any harmful, unethical, racist, sexist, toxic, dangerous, or illegal content. Please ensure that your responses are socially unbiased and positive in nature. If a question does not make any sense or is not factually coherent, explain why instead of answering something not correct. If you don't know the answer to a question, please don't share false information.
What is Olopatidine acts as an:- and explain in detail?
Olopatadine is a topical second generation anti-histaminic drugs It is used for allergic conjunctivitis as eye drops. ANTIHISTAMINIC DRUGS FIRST GENERATION SECOND GENERATION Promethazine Terfendaine (withdrawn now) Diphenhydramine Astemizole (withdrawan) Dimenhydrinate Fexofenadine Pheniramine Loratidine Chlorpheniramine Cetirizine Cinnarizine Levocetirizine Meclizine Mizolastine Cyclizine Azelastine Hydroxyzine Olopatadine Mepyramine Ebastine Buclizine Desloratidine