Zyrtec Plus is a combination medication containing 5 mg cetirizine dihydrochloride and 120 mg pseudoephedrine hydrochloride. This prescription medication comes in a pack of 14 tablets and is manufactured by GSK for treating allergy symptoms with nasal congestion. As this is a prescription medication, it should only be taken under the direction of a healthcare provider. The combination of antihistamine (cetirizine) and decongestant (pseudoephedrine) helps relieve multiple allergy symptoms. Always read the medication guide and follow prescribed dosing instructions.