Loratadine tablets for the treatment of urticaria. Urticaria is a vascular skin reaction that is caused by the release of other vasoactive substances due to localized histamine or hypersensitivity. It can be categorized into acute urticaria and chronic urticaria. Acute urticaria develops rapidly and usually has a clear cause, such as hypersensitivity to a drug, food, insect bite, or contact allergen. It disappears within 12 to 24 hours and is more likely to recur. In chronic cases, the disease lasts more than 6 weeks and can recur over months or years, and the cause is usually unknown. Sometimes psychological factors can also cause urticaria. The causes of urticaria are generally allergic reactions, Lyme disease, drugs and so on. Treatment is mainly to remove the cause of the disease, symptomatic treatment, to prevent recurrence, if you can not remove the cause of the disease should be reduced to promote the development of a variety of factors. Acute urticaria can be used to reduce vascular permeability drugs and antihistamines, hormones for severe symptoms, if the combination of infection also need to cooperate with antibiotics. Chronic urticaria to antihistamine therapy, if necessary, can be used in combination of two. Loratadine is an antihistamine h1 receptor antagonist, belonging to the second generation of antihistamines. Urticaria with is effective but regardless of acute or chronic need regular hospital doctor guidance medication can be. The lack of formal treatment will delay or even aggravate the condition.