Zyrtec Plus (also known as Cirrus) is a combination medication containing 5 mg cetirizine dihydrochloride and 120 mg pseudoephedrine hydrochloride. It comes in a pack of 14 tablets and is used to treat cold, flu and allergy symptoms including nasal congestion. This prescription medication combines an antihistamine (cetirizine) to relieve allergy symptoms with a decongestant (pseudoephedrine) to reduce nasal congestion. The tablets should be taken as directed by your healthcare provider. As with any medication, side effects may occur. Consult your doctor or pharmacist before use, especially if you have any medical conditions or are taking other medications. Keep out of reach of children.