Zyrtec Rapid Acting 24 hour Hayfever & Allergy Relief Antihistamine Mini Tablets relieve hayfever & allergy symptoms and are small and easy to swallow.<br><br>When your immune system takes offence to an outside particle or substance, your body produces antibodies to attack this normally harmless substance by releasing a chemical called histamine.<br><br>Zyrtec contains the active ingredient, cetirizine, which helps to block the production of histamines to relieve symptoms of hayfever and year round allergies. Cetirizine is part of a class of medications called antihistamines. <br><br>Zyrtec Hayfever & Allergy Mini Tablets provide fast powerful 24 hour relief of hayfever & allergy symptoms, including:<br>- Sneezing<br>- Runny, itchy nose<br>- Red, itchy and watery eyes <br>- Hives and itchy skin rash<br>- Post nasal drip<br><br>Zyrtec is effective against seasonal hayfever & year round allergy triggers, such as:<br>- Pollen<br>- Pet Dander<br>- Dust<br>- Mould