Cetirizine for allergic rhinitis in children is usually taken for 3 to 5 days. Allergic rhinitis is usually caused by pollen, dust mites, and fungi. It is often accompanied by sneezing, itchy nose, nasal congestion, runny nose and other symptoms. Cetirizine drops are mainly used to treat allergic rhinitis, pruritus, and hives. Children should not take cetirizine for more than a week at the longest. It is usually taken for 3 to 5 days. Adverse effects of cetirizine generally include drowsiness, somnolence, headache, dizziness, agitation, dry mouth, and gastrointestinal discomfort. It is contraindicated in people who are allergic to it. Allergic rhinitis can also be treated by applying physiologic seawater nasal spray or fluticasone propionate nasal spray. Children are advised to seek prompt medical attention. The above medications should be used under medical supervision.