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 The leukotriene receptor antagonist used in bronchial asthma is: and explain in detail?
Among the options given only Zafirleukast is leukotriene receptor antagonist. Zileuton is a 5-Lipoxygenase inhibitor, Ketotifen is an antihistaminic (H1) and Omalizumab is a recombinant humanized monoclonal anti-IgE antibody. Ref: Bronchial Asthma: A Guide for Practical Understanding and Treatment, Springer, 2011, Page 193; Current Review of Asthma, By Michael A. Kaliner - Page 216; Essentials of Medical Pharmacology, KD Tripathi - 5th Edition, Page 205-206; Katzung & Trevor's Pharmacology 10th Edition, Page 325.