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.
Call your doctor immediately if you take Zyrtec and have any of the following serious side effects: 1  Fast, pounding, or uneven heartbeat. 2  Weakness, tremors, or sleep problems. 3  Severe restless feeling, hyperactivity. 4  Confusion. 5  Problems with vision. 6  Urinating less than usual or not at all.