ZYRTEC-D 12 HOUR® Extended Release Tablets have the benefits of ZYRTEC, plus a decongestant to relieve your stuffy nose caused by allergies. ZYRTEC-D 12 HOUR® Extended Release Tablets is also the only decongestant allergy medicine of its kind approved to treat both indoor and outdoor allergy symptoms.
| Features | ZYRTEC-D 12 HOUR® (cetirizine HCl) | Allegra-D® 12 HOUR |
| Approved for treatment of indoor (year-round) allergies | + | |
| Approved for treatment of outdoor (seasonal) allergies | + | + |
| Approved for treatment of nasal congestion due to allergies | + | + |
Allegra (fexofenadine HCl) and Allegra-D are registered trademarks of sanofi-aventis Group.