Zyrtec-D Allergy Relief & Nasal Decongestant Tablets combine the proven allergy relief of Zyrtec with a powerful nasal decongestant to relieve allergy symptoms and nasal congestion. 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. 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 relief, plus nasal decongestant, works on allergy congestion in as little as 30 minutes. Allergy medicine relieves allergy & congestion symptoms due to both indoor & outdoor allergies. Zyrtec-D Allergy Relief & Nasal Decongestant Tablets combine the proven allergy relief of Zyrtec with a powerful nasal decongestant to relieve allergy symptoms and nasal congestion. Shop for Zyrtec D at Walmart.com. Save money. Live better. 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.