Cetirizine hydrochloride tablets generally work after 30 to 60 minutes. After oral administration of cetirizine hydrochloride tablets, the peak blood concentration is reached in 30 to 60 minutes, so it usually takes effect after 30 to 60 minutes. Cetirizine Hydrochloride Tablets are indicated for respiratory, skin and eye allergic diseases, including perennial allergic diseases. Adverse reactions: headache, dizziness, drowsiness, agitation, dry mouth, abdominal discomfort, allergic reactions. CONTRAINDICATIONS: Contraindicated in persons who are hypersensitive to any of the components of the product or to hydroxyzine. Contraindicated in patients with severe renal impairment. Precautions: Avoid use after alcohol, use with caution for drivers, people operating machinery or working at heights. If you need to use Cetirizine Hydrochloride Tablets, it is recommended to go to a regular hospital and use the medicine under the guidance of a doctor.