- Are Xyzal and Allegra the Same Thing?
- What Are Possible Side Effects of Xyzal?
- What Are Possible Side Effects of Allegra?
- What Is Xyzal?
- What Is Allegra?
- What Drugs Interact with Xyzal?
- What Drugs Interact with Allegra?
- How Should Xyzal Be Taken?
- How Should Allegra Be Taken?
Are Xyzal and Allegra the Same Thing?
Xyzal (levocetirizine dihydrochloride) and Allegra (fexofenadine hydrochloride) are antihistamines used to treat allergic symptoms of seasonal allergic rhinitis (sneezing, runny nose, itchy or watery eyes), and hives.
Both Xyzal and Allegra are available over-the-counter (OTC).
What Are Possible Side Effects of Xyzal?
Common side effects of Xyzal include:
- drowsiness,
- fatigue,
- weakness,
- tired feeling,
- stuffy nose,
- sinus pain,
- sore throat,
- cough,
- vomiting,
- diarrhea,
- constipation,
- dry mouth, or
- weight gain
Tell your doctor if you have serious side effecs of Xyzal including:
- lightheadedness,
- nosebleeds (especially in a child),
- pain or fullness in your ear,
- hearing problems,
- depression,
- agitation,
- aggression,
- hallucinations,
- numbness or tingling around your lips or mouth,
- yellowing of your skin or eyes (jaundice),
- painful or difficult urination,
- dark-colored urine,
- foul-smelling stools,
- fever,
- stomach pain, or
- loss of appetite
What Are Possible Side Effects of Allegra?
Common side effects of Allegra include:
- nausea,
- diarrhea,
- upset stomach,
- muscle or back discomfort or pain,
- sleepiness,
- drowsiness,
- tiredness,
- headache, and
- menstrual cramps.
Contact your doctor if you have serious but less common side effects of Allegra including
What Is Xyzal?
Xyzal (levocetirizine dihydrochloride) is an antihistamine indicated for the relief of symptoms associated with seasonal allergic rhinitis in adults and children 2 years of age and older.
What is Allegra?
Allegra (fexofenadine hydrochloride) is an antihistamine used to treat allergic symptoms of seasonal allergic rhinitis (sneezing, runny nose, itchy or watery eyes), and urticaria (hives). Allegra is available as a generic drug.

SLIDESHOW
Could I Be Allergic? Discover Your Allergy Triggers See SlideshowWhat Drugs Interact With Xyzal?
Xyzal may interact with alcohol, other medicines that can make you drowsy (cold or allergy medicine, sedatives, narcotics, sleeping pills, muscle relaxers, medicine for seizures, depression or anxiety). Xyzal may also interact with ritonavir or theophylline.
What Drugs Interact With Allegra?
Allergra may interact with alcohol, other medicines that can make you drowsy (cold or allergy medicine, sedatives, narcotics, sleeping pills, muscle relaxers, medicine for seizures, depression or anxiety). Allegra may also interact with ketoconazole or erythromycin.
How Should Xyzal Be Taken?
Xyzal is available as 2.5 mg/5 mL (0.5 mg/mL) oral solution and as 5 mg breakable (scored) tablets, allowing for the administration of 2.5 mg, if needed. Xyzal can be taken without regard to food consumption.
How Should Allegra Be Taken?
Do not use
if you have ever had an allergic reaction to this product or any of its ingredients.
Ask a doctor before use if you have
kidney desease. Your doctor should determine if you need a different dose.
When using this product
- do not take more than directed
- do not take at the same time as aluminum or magnesium antacids
- do not take with fruit juices
Stop use and ask a doctor if
an allergic reaction to this product occurs. Seek medical help right away.
If pregnant or breast-feeding,
ask a health professional before use.
Keep out of reach of children.

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RxList. Xyzal Side Effect Drug Center.
https://www.rxlist.com/xyzal-side-effects-drug-center.htm
Allegra Consumer Product Information.
https://www.allegra.com/