Xyzal Allergy 24HR Side Effects
Generic name: levocetirizine
Medically reviewed by Drugs.com. Last updated on Feb 4, 2023.
Note: This document contains side effect information about levocetirizine. Some dosage forms listed on this page may not apply to the brand name Xyzal Allergy 24HR.
Summary
More frequent side effects include: drowsiness, fatigue, and nasopharyngitis. Continue reading for a comprehensive list of adverse effects.
Applies to levocetirizine: oral solution, oral tablet.
Serious side effects of Xyzal Allergy 24HR
Along with its needed effects, levocetirizine (the active ingredient contained in Xyzal Allergy 24HR) may cause some unwanted effects. Although not all of these side effects may occur, if they do occur they may need medical attention.
Check with your doctor immediately if any of the following side effects occur while taking levocetirizine:
Less common
- Fever
- nosebleed
Incidence not known
- Anxiety
- attack, assault, or force
- bloody, cloudy, or dark urine
- blurred or loss of vision
- burning feeling while urinating
- burning, crawling, itching, numbness, prickling, "pins and needles", or tingling feelings
- chills
- clay-colored stools
- confusion
- cough
- decrease in the frequency of urination
- decrease in urine volume
- deep or fast breathing with dizziness
- diarrhea
- difficult or labored breathing
- difficulty in passing urine (dribbling)
- difficulty with swallowing or speaking
- discouragement
- disturbed color perception
- dizziness, fainting, or lightheadedness when getting up suddenly from a lying or sitting position
- double vision
- drooling
- dry mouth
- fast, irregular, pounding, or racing heartbeat or pulse
- feeling of constant movement of self or surroundings
- feeling sad or empty
- fixed position of the eye
- general tiredness and weakness
- halos around lights
- headache
- hives or welts, itching, skin rash
- inability to move the eyes
- increased blinking or spasms of the eyelid
- irritability
- joint or muscle pain
- lack of appetite
- large, hive-like swelling on the face, eyelids, lips, tongue, throat, hands, legs, feet, or genitals
- light-colored stools
- loss of balance control
- loss of interest or pleasure
- muscle trembling, twitching, jerking, or stiffness
- nausea
- nervousness
- night blindness
- numbness of the feet, hands, and around the mouth
- overbright appearance of lights
- painful urination
- puffiness or swelling of the eyelids or around the eyes, face, lips, or tongue
- redness of the skin
- restlessness
- rhythmic movement of the muscles
- seeing, hearing, or feeling things that are not there
- seizures
- sensation of spinning
- shaking
- shuffling walk
- sticking out of the tongue
- stomach pain
- swelling of the face, feet, or lower legs
- thoughts of killing oneself
- tightness in the chest
- tremor
- trouble concentrating
- trouble with sleeping
- tunnel vision
- twisting movements of the body
- uncontrolled movements, especially of the face, mouth, tongue, neck, and back
- uncontrolled twisting movements of the neck, trunk, arms, or legs
- unpleasant breath odor
- unusual facial expressions
- unusual tiredness or weakness
- upper right stomach pain
- vomiting with or without blood
- weight gain
- yellow eyes and skin
Other side effects of Xyzal Allergy 24HR
Some side effects of levocetirizine may occur that usually do not need medical attention. These side effects may go away during treatment as your body adjusts to the medicine. Also, your health care professional may be able to tell you about ways to prevent or reduce some of these side effects.
Check with your health care professional if any of the following side effects continue or are bothersome or if you have any questions about them:
More common
- Muscle aches
- sleepiness or unusual drowsiness
- sore throat
- stuffy or runny nose
Less common
- Body aches or pain
- dryness of the throat
- earache
- hoarseness
- redness or swelling in the ear
- tender, swollen glands in the neck
- voice changes
Less common
- Change in or loss of taste
- difficulty in moving
- increased appetite
- joint pain or swelling
- muscle pain, cramp, or stiffness
- nightmares
For Healthcare Professionals
Applies to levocetirizine: oral solution, oral tablet.
General
The most frequently reported side effects were: somnolence, nasopharyngitis, fatigue, dry mouth, and pharyngitis (in 12 years and older); pyrexia, somnolence, cough, and epistaxis (in patients 6 to 12 years); pyrexia, diarrhea, vomiting, and otitis media (in patients 1 to 5 years); diarrhea and constipation (in patients 6 to 11 months).[Ref]
Nervous system
Common (1% to 10%): Somnolence, dizziness, headache
Uncommon (0.1% to 1%): Paresthesia, syncope
Rare (0.01% to 0.1%): Convulsion, movement disorder
Very rare (less than 0.01%): Dysgeusia, tremor, dystonia, dyskinesia
Frequency not reported: Orofacial dyskinesia, myoclonus, extrapyramidal symptoms
Postmarketing reports: Febrile seizure[Ref]
Ocular
Very rare (less than 0.01%): Accommodation disorder, vision blurred, oculogyration
Postmarketing reports: Visual disturbance[Ref]
Respiratory
Common (1% to 10%): Nasopharyngitis, pharyngitis, cough, epistaxis, rhinitis
Postmarketing reports: Dyspnea[Ref]
Gastrointestinal
Common (1% to 10%): Dry mouth, diarrhea, vomiting, constipation, abdominal pain
Postmarketing reports: Nausea[Ref]
Other
Common (1% to 10%): Fatigue, pyrexia, otitis media
Uncommon (0.1% to 1%): Weight increased, asthenia, malaise
Rare (less than 0.1%): Edema
Frequency not reported: Stillbirth
Postmarketing reports: Vertigo[Ref]
Psychiatric
Uncommon (0.1% to 1%): Agitation
Rare (0.01% to 0.1%): Aggression, confusion, depression, hallucination, insomnia
Very rare (less than 0.01%): Tic, enuresis
Postmarketing reports: Suicidal ideation, nightmare[Ref]
Genitourinary
Very rare (less than 0.01%): Dysuria
Postmarketing reports: Urinary retention[Ref]
Cardiovascular
Rare (less than 0.1%): Tachycardia
Frequency not reported: Severe hypotension
Postmarketing reports: Palpitation[Ref]
Dermatologic
Uncommon (0.1% to 1%): Pruritus, rash
Rare (0.01% to 0.1%): Urticaria
Very rare (less than 0.01%): Angioedema, fixed drug eruption
Frequency not reported: Acute generalized exanthematous pustulosis[Ref]
Hepatic
Rare (less than 0.1%): Hepatic function abnormal, transaminases increased, bilirubin increased
Frequency not reported: Cholestasis
Postmarketing reports: Hepatitis[Ref]
Hematologic
Very rare (less than 0.01%): Thrombocytopenia[Ref]
Immunologic
Rare (0.01% to 0.1%): Hypersensitivity
Very rare (less than 0.01%): Anaphylactic shock[Ref]
Renal
Frequency not reported: Glomerulonephritis[Ref]
Metabolic
Postmarketing reports: Appetite increased[Ref]
Musculoskeletal
Postmarketing reports: Myalgia, arthralgia[Ref]
Frequently asked questions
More about Xyzal Allergy 24HR (levocetirizine)
- Check interactions
- Compare alternatives
- Reviews (1)
- Imprints, shape & color data
- Dosage information
- During pregnancy
- Drug class: antihistamines
- Breastfeeding
Patient resources
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Professional resources
Related treatment guides
References
1. Cerner Multum, Inc. "UK Summary of Product Characteristics." O 0
2. "Product Information. Xyzal (levocetirizine)." UCB Pharma Inc (2007):
Further information
Always consult your healthcare provider to ensure the information displayed on this page applies to your personal circumstances.
Some side effects may not be reported. You may report them to the FDA.