Promotions or discounts may be activated or redeemed via one of the following methods, depending on the individual promotion or discount: Site links– clicking on certain links on Zyrtec.com may add products to your cart, with a promotion or discount automatically applied. You will see these discounts reflected in your Shopping Cart and at Checkout. Auto apply - certain discounts will be automatically applied, simply by visiting Zyrtec.com. You will see these discounts reflected in your Shopping Cart and at Checkout. We will generally feature them on the Zyrtec.com homepage as well. Promo codes - you may enter your code to have a discount/offer applied at Checkout. Only promo codes from Zyrtec.com are eligible for redemption at Zyrtec.com. Promotions and offers cannot be combined, unless otherwise stated. Zyrtec.com reserves the right to change or discontinue promotions or discount programs at any time.