Keratan, scientifically known as loratadine, can usually be taken for a week, or even a few months to six months, when treating hives. Of course, during the time of treatment, regular blood tests, liver and kidney function are needed to exclude the side effects caused by the drug. If the treatment effect is not very satisfactory, you can also take oral anti-allergy drugs such as Avastin tablets, fexofenadine hydrochloride tablets, and other anti-allergy drugs specifically for hives, and you can take oral compound glycopyrrolate capsules to strengthen the anti-allergy treatment. Alcohol should be avoided during the treatment to avoid unnecessary physical harm. It is also necessary to check the allergens and avoid contact with the corresponding allergic substances to reduce the chances of recurrence and shorten the course of treatment.