Loratadine capsule is a drug with anti-allergic effect, which is more commonly used in dermatology and otorhinolaryngology. It is often used clinically to relieve urticaria and other allergic skin diseases that cause itchy skin, and also for the treatment of allergic rhinitis that causes runny nose, sneezing, itchy nose, nasal congestion and other symptoms. The drug is a hard capsule preparation, the contents of which are a whitish powder containing loratadine as the main ingredient. The exact dose to be used depends on the patient’s age, condition, and the treatment plan given by the doctor. Some patients may experience general weakness, drowsiness, dry mouth, dizziness, headache and other adverse reactions when using it. It is contraindicated in patients who are allergic to loratadine capsules and should be used with caution during pregnancy and breastfeeding.