Okeechobee County School District Perseverance, Respect, Integrity, Dependability, Ethics
A: Zyrtec-D is a combination tablet of an antihistamine (Zyrtec) and a decongestant (pseudoephedrine). Antihistamines help with sneezing, runny noses and drainage. Decongestants help relieve pressure and pain in the sinuses. Zyrtec or the antihistamine portion has a potential to cause some drowsiness and dry mouth. Sudafed (pseudoephedrine) can cause difficulty sleeping, nausea, and loss of appetite.
Zyrtec-D 12 Hour is a decongestant (pseudoephedrine) and antihistamine (cetirizine) combination. It works by blocking a chemical in the body, histamine, which causes allergy symptoms. It also shrinks swollen nasal passages, which relieves nasal congestion.