What Is a Decongestant? – Allergy Guide™ ZYRTEC®

Although often confused, decongestants are different from antihistamines. Antihistamines help relieve most allergy symptoms by blocking the action of histamine in your system, not the congestion. ZYRTEC-D® contains both an antihistamine and a decongestant for allergies. It powerfully clears your blocked nose and relieves other allergy symptoms.…