Take 15% off select allergy products when you use the code ALLERGY15 during checkout at Jet.com. Shipping is free on orders over $35, otherwise it adds $5.99. The promotion includes these Zyrtec Allergy 10mg Tablets, where a 100-tablet pack falls from $37.99 to $32.29 with the code. That's the best price we can find anywhere. Use the code with select Benadryl, Visine, and Sudafed products as well. Sales tax is charged in most states.