Xyzal is the brand name for the drug levocetirizine, an antihistamine. According to Drugs.com, histamine is a naturally occurring chemical in the body that produces symptoms such as sneezing, watery eyes and a runny nose. By reducing the symptoms created by histamines, Xyzal can limit the discomfort individuals experience with allergies. Xyzal is often used to treat patients over 6 months of age who have year-round allergies, patients over 2 years of age who have seasonal allergies and patients over 6 months of age who have chronic hives. As with any medication, Xyzal has the potential for side effects.
Less Serious Side Effects
According to Drugs.com, the following are considered mild side effects of Xyzal use unless they become persistent or overly bothersome: drowsiness, weakness, nasal congestion, sinus pain, sore throat, cough, tiredness, dry mouth or weight gain.
Serious Side Effects
Patients who experience serious side effects should discontinue the use of Xyzal and contact a medical professional for help, warns Drugs.com. The side effects considered to be serious include feeling faint, bloody nose, confusion, hallucinations, abnormal thoughts, numbness or tingling of the lips or mouth area, jaundice, darkened urine, foul-smelling stools, fever, abdominal pain or loss of appetite. EMedTV.com warns patients to contact a doctor if they experience extreme drowsiness that interferes with daily activities.
Allergic Reaction
An allergic reaction can be serious in some patients. Drugs.com reports the symptoms of a hazardous allergic reaction to be hives, trouble breathing, oral swelling, facial swelling or swelling of the throat.
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