In clinical practice, the exact time period when levocetirizine hydrochloride tablets should be taken depends on different situations and different analysis. Clinically, for levocetirizine hydrochloride tablets can be taken before bedtime or after meals. In the usual application of levocetirizine hydrochloride tablets, mainly for the treatment of allergic diseases such as urticaria and allergic rhinitis, because levocetirizine hydrochloride tablets are mainly anti-allergic drugs, it can be taken at night before bedtime, the reason for this is because its side effects have the adverse effect of drowsiness, taken before bedtime, can reduce the patient to appear drowsy, sleepy, poor mental status of such situations. In addition, levocetirizine hydrochloride tablets also have a certain stimulating effect on the gastrointestinal system, so it is also possible to take levocetirizine hydrochloride tablets after meals, so the choice is made clinically according to your situation, either after meals or before bedtime.