Taking loratadine one week into pregnancy may have some degree of effect and should be used with caution under the supervision of a physician, requiring abortion if necessary. Loratadine belongs to the commonly used anti-allergy drugs, which can be used for the rapid relief of symptoms associated with allergic rhinitis such as itching and burning sensation in the eyes, sneezing, nasal congestion, itchy nose, runny nose, etc., as well as for the relief of the signs and symptoms of allergic dermatoses (e.g., pruritic dermatoses, chronic urticaria, etc.). The drug is prohibited for use in people who are allergic to the product, and should be used with caution in pregnant and lactating women, so women who are one week pregnant and have used loratadine may have some effect on the fetus, and those who have to take it may subsequently complete regular pregnancy checkups to detect the development of the fetus, and if necessary, perform abortion surgery. Common adverse reactions to this medication include having headache, drowsiness, weakness, dry mouth, nausea, gastritis, and rash. The specific use of this drug should be under the guidance of a specialist and should not be used without authorization.