Zirtek Allergy Relief for Children 1mg/ml Oral Solution Zirtek Allergy Relief for Children 1mg/ml Oral Solution treats hayfever, year round allergies such as dust or pet allergies & urtiaria in adults & children aged 2 years & over. It contains the active ingredient cetirizine dihydrochloride, an antihistamine that blocks the effects of histamine to relieve the unpleasant symptoms & discomfort associated with these conditions, such as sneezing, irritated, runny & blocked up nose, itchy, red & watering eyes & skin rashes. Zirtek Allergy Relief for Children 1mg/ml Oral Solution is banana flavoured & is sugar free, so won't damage your child's growing teeth.