Zyrtec Tablet is used to treat allergies. It contains Cetirizine, which blocks the effects of a chemical messenger known as histamine, which is naturally involved in allergic reactions. It may cause some side effects such as tiredness, feeling sleepy, abdominal pain, headache, dizziness, dry mouth, sore throat, and nausea. Before starting this medicine, inform your doctor if you are pregnant, breastfeeding, taking any other medicines or have pre-existing medical conditions
