Olopatadine hydrochloride tablets are mainly for anti-allergic and anti-inflammatory purposes. This drug is mainly used clinically for allergic dermatitis, or pruritus and urticaria, etc. Some patients with itchy inflammatory skin reactions or significant exudative reactions can be treated with this drug orally. In addition to the treatment of allergic skin diseases, it can also be used for the treatment of allergic asthma or allergic rhinitis, and patients who develop allergic conjunctivitis can also be treated with this drug orally. When taking this drug orally, if it produces a certain amount of drowsiness, try to take it orally before going to bed, and try not to drive or go to high altitudes while taking the drug orally.