Children's Xyzal® Allergy 24HR liquid is made to put kids' tough allergies to bed. It relieves allergy symptoms such as sneezing, itchy eyes, watery eyes, runny nose, itchy nose, and itchy throat. Just give your child Xyzal® at night for 24 hours of continuous allergy relief that won't fade into the next day.

A Xyzal® 5mg breakable (scored) tablet once daily in the evening is the dosage for adults and children from 12 to 64 years of age. A 1/2 tablet (2.5 mg) once daily in the evening may be appropriate for less severe symptoms. Children's Xyzal® is also available in an oral solution for children 2 to 11 years old.

Our Verdict. Xyzal is an antihistamine used to relieve a variety of indoor and outdoor allergy symptoms, as well as hives. A 24-hour over-the-counter allergy medication, Xyzal is safe and effective at the recommended daily dose, but it may cause drowsiness, according to the U.S. Food and Drug Administration (FDA).

As the latest over-the-counter branded oral antihistamine, Xyzal® offers effective relief for symptoms of hay fever or other respiratory allergies year-round.

Levocetirizine is an antihistamine used to relieve allergy symptoms such as watery eyes, runny nose, itching eyes/nose, and sneezing. It is also used to relieve itching and hives. It works by blocking a certain natural substance (histamine) that your body makes during an allergic reaction.

Common Xyzal side effects include drowsiness, cold-like symptoms, and fatigue. Dry mouth can also happen. Trouble urinating is a more serious, but rare, Xyzal side effect. If you have kidney problems, Xyzal might not be the best antihistamine option for you.

Xyzal (levocetirizine) and Zyrtec (cetirizine) both belong to the same medication class - antihistamines. Both can be helpful in treating allergies. Side effects of Xyzal versus Zyrtec may vary from person to person. Some people may experience less drowsiness with Xyzal.

Drowsiness, tiredness, and dry mouth may occur. Fever or cough may also occur, especially in children. If any of these effects last or get worse, tell your doctor or pharmacist promptly.

Levocetirizine is an antihistamine used to relieve allergy symptoms such as watery eyes, runny nose, itching eyes/nose, and sneezing. It is also used to relieve itching and hives. It works by blocking a certain natural substance (histamine) that your body makes during an allergic reaction.

How long does levocetirizine (Xyzal Allergy) take to work? In a clinical study, levocetirizine (Xyzal Allergy) worked to relieve allergy symptoms within 1 hour. In comparison, it took about 1.5 hours for people taking loratadine (Claritin) to feel their symptoms improving.

Common side effects of Xyzal include:

• drowsiness,
• fatigue,
• weakness,
• tired feeling,
• stuffy nose,
• sinus pain,
• sore throat,
• cough,

Diphenhydramine HCL is a sedating antihistamine. The medication has been used since 1946 for allergies, but because the medication is sedating, or sleep-inducing, people have also used it to help them sleep.