Loratadine in the treatment of acute urticaria is generally recommended to take the drug for at least 1 week, even after the drug no longer hives is recommended to take enough 7 days, for some acute urticaria rash during the use of the drug is still on the rash, or use the drug after a period of continuous rash still can not be completely controlled, eat loratadine longer time. It is recommended to take it for 5-7 days after not getting hives, so the number of days to take loratadine for acute hives depends on the individual’s reaction to the medication, and some of the time may be longer.