Zyrtec Plus is a combination antihistamine medication containing cetirizine and pseudoephedrine that comes in a pack of 14 tablets. It provides relief from allergy symptoms while also helping to clear nasal congestion. This medication combines an antihistamine (cetirizine) to treat allergy symptoms with a decongestant (pseudoephedrine) to relieve nasal congestion. As this is a prescription medication, it should only be taken under the direction of a healthcare provider who can determine proper dosage based on individual needs. Side effects and drug interactions may occur.