Loratadine tablets should not be taken twice a day, and the exact dosage should be taken as prescribed by your doctor. Loratadine is a long-lasting drug that is mainly used to relieve symptoms associated with allergic rhinitis, such as sneezing, runny nose, itchy nose, nasal congestion, itchy and burning sensation in the eyes, and is also used to relieve the signs and symptoms of chronic urticaria, prurigo, and other allergic skin diseases. The effect of loratadine can generally be maintained for about 24 hours, the instructions recommend that the regular dose of adults and children over 12 years of age once a day, each time 1 tablet (10mg); 2 to 12 years of age: body weight> 30 kg once a day, each time 1 tablet (10mg); body weight ≤ 30 kg once a day, each time half a tablet (5mg), the patient must follow the doctor’s instructions for the use of medication. Common adverse reactions to loratadine tablets include weakness, headache, drowsiness, dry mouth, nausea, gastritis, rash and other symptoms. A small number of patients experienced hair loss, allergic reactions, abnormal liver function, tachycardia, palpitations (rapid heartbeat, often accompanied by panic) and other symptoms. Loratadine Tablets are contraindicated in patients who are allergic to the ingredients, and should be used with caution in pregnancy and lactation, and caution should be exercised when combining this product with ketoconazole, macrolide antibiotics, cimetidine, theophylline and other drugs. If you need to use loratadine tablets, it is recommended to consult a professional doctor and follow the doctor’s instructions to standardize the treatment, not to use the drug arbitrarily.