Xyzal is a medication in a class of drugs known as antihistamines. It works by decreasing the amount of histamine in the body. According to Drugs.com, histamine is the chemical responsible for the production of cold and allergy symptoms such as sneezing, itching, watery eyes, and runny nose. Taking Xyzal can help to reduce the symptoms of seasonal allergies and the common cold. There are some side effects associated with Xyzal.
Stomach Pain
Some patients may experience stomach pain while taking Xyzal. Stomach pain is considered a serious side effect and should be reported to a doctor, states Drugs.com. Fever and loss of appetite may also occur and should be reported to a doctor, as well.
Weakness and Drowsiness
Xyzal may cause users to experience weakness and drowsiness. These symptoms may lessen over time as the body adjusts to Xyzal. Patients should use caution while driving or completing activities, which require them to be awake and alert, until they know how this medication will affect them.
Cold Symptoms
Some patients taking Xyzal may develop cold symptoms. Symptoms can include stuffy nose, sinus pain, sore throat and cough. The use of humidified air, saline nasal spray, and throat lozenges may help to relieve such symptoms. If these symptoms occur in conjunction with fever, swollen lymph glands, rash, difficulty breathing, sinus pain or pressure, or a yellow or green tinged sputum, it may be a sign of a bacterial infection, which requires medical treatment.
Dry Mouth
According to PubMed Health, dry mouth may occur while taking Xyzal. Drinking ample fluids throughout the day to remain hydrated may help alleviate dry mouth. Mouthwash, mints, and hard candies may also help diminish dry mouth. Routine dental care should continue while taking Xyzal.
Nosebleed
Xyzal may cause nosebleed in some users. In the event that nosebleed occurs, applying gentle pressure to the nostrils and tilting the head forward can help to stop bleeding. Bleeding may be more difficult to control in patients taking anticoagulant medications. A nosebleed that continues or worsens should be brought to the attention of a physician.



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