Zyrtec-D is a combination of cetirizine and pseudoephedrine. This medication is both an antihistamine and a decongestant. It treats symptoms of allergies. Learn about Zyrtec-D (cetirizine / pseudoephedrine) usage and dosing. Read the latest news and reviews about the drug as well as potential side effects and popular alternatives. ZYRTEC-D ® Allergy Relief and Nasal Decongestant Tablets contain 5 mg cetirizine HCl antihistamine and 120 mg pseudoephedrine decongestant for relief from nasal congestion, sinus pressure, and allergy symptoms caused by pollen, dust, pet dander, mold, and other airborne allergens. What is ZYRTEC-D® and What is it Used for? ZYRTEC-D ® is an allergy relief medication combined with a powerful decongestant. If you’ve found yourself suffering with a ‘stuffy’ nose and congestion, it could be just the thing you need to unblock your sinuses – and your day. Dilated blood vessels can cause nasal congestion (stuffy nose). Zyrtec-D is a combination medicine used to treat cold or allergy symptoms such as nasal and sinus congestion, sneezing, itching, watery eyes, or runny nose. Zyrtec-D may also be used for purposes not listed in this medication guide. Zyrtec-D allergy medicine gets to work on your sinus congestion in as little as 30 minutes & provides 12 hours of relief from symptoms such as runny nose, itchy, watery eyes, sneezing, itchy throat and nose, sinus pressure & nasal congestion Shop zyrtec d at Walgreens. Find zyrtec d coupons and weekly deals. Pickup & Same Day Delivery available on most store items.