Levocetirizine Hydrochloride and Clarithromycin are not in conflict with each other, and can be used in combination if the condition requires it and there are no contraindications, but they must be taken in accordance with the doctor’s instructions. Levocetirizine hydrochloride is a kind of antihistamine, mainly used for the treatment of allergy-related diseases, such as allergic rhinitis, chronic idiopathic urticaria, etc., the side effects of headache, drowsiness, dry mouth, fatigue, abdominal pain, etc., lactose intolerant people, uremia, allergic to the product is prohibited. Clarithromycin is an antibiotic used for the treatment of respiratory, pulmonary, skin and soft tissue infections, odontogenic infections, etc.; side effects include gastrointestinal reactions such as nausea, vomiting, abdominal pain, diarrhea, as well as headache, elevated liver enzymes, etc.; it is contraindicated in those who are allergic to macrolide antibiotics, and is prohibited to be used in combination with astemizole, cisapride, piperizine and terfenadine. Levocetirizine hydrochloride and clarithromycin capsules are not contraindications, so in the case of the condition requires and no contraindications to the two drugs can be used together, but should be taken under the guidance of a doctor on medical advice, do not use on their own.