Loratadine citrate is contraindicated in people who are allergic to the active ingredient or excipient. Loratadine citrate capsule is an antihistamine, also known as an anti-allergic drug, mainly used for the relief of systemic and local symptoms of chronic idiopathic urticaria and perennial allergic rhinitis. The main adverse reactions are nausea, dizziness, headache, drowsiness, dry mouth, malaise, occasional drowsiness, amnesia and morning facial and limb edema. Rarely, allergic reactions, including hypersensitivity and rash, have been observed. It should be noted that patients with hepatic or renal dysfunction, bladder meridian obstruction or urinary retention, prostatic hypertrophy, and glaucoma should use the drug as prescribed. The safety of the drug is unknown in pregnant women and should be used under medical supervision. The drug is recommended to be taken under medical supervision, do not take the drug on your own to avoid adverse reactions.