Levocetirizine Dihydrochloride Side Effects

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

If your doctor has directed you to use this medication, remember that he or she has judged that the benefit to you is greater than the risk of side effects. Many people using this medication do not have serious side effects.

Tell your doctor right away if you have any serious side effects, including: difficulty urinating, weakness.

A very serious allergic reaction to this drug is rare. However, get medical help right away if you notice any symptoms of a serious allergic reaction, including: rash, itching/swelling (especially of the face/tongue/throat), severe dizziness, trouble breathing.

This is not a complete list of possible side effects. If you notice other effects not listed above, contact your doctor or pharmacist.

In the US -

Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088 or at www.fda.gov/medwatch.

In Canada - Call your doctor for medical advice about side effects. You may report side effects to Health Canada at 1-866-234-2345.

• suicidal ideation
• motor tic disorder
• nightmares
• agitation
• depression
• aggressive behavior
• myoclonus
• extrapyramidal disease
• blurred vision
• visual changes
• hypotension
• pharyngitis
• xerostomia
• constipation
• hepatitis
• cholestasis
• glomerulonephritis
• pruritus of skin
• urticaria
• arthralgia
• myalgia
• drowsy
• hallucinations
• syncope
• seizure disorder
• vertigo
• dizziness
• insomnia
• fever
• fatigue
• tremor
• dysgeusia
• dyskinesia
• skin rash
• edema
• weight gain
• increased appetite
• epistaxis
• palpitations
• dyspnea
• cough
• nausea
• vomiting
• diarrhea
• dysuria
• urinary retention
• anaphylaxis
• angioedema
• paresthesia
• general weakness
• acquired dystonia
• acute generalized exanthematous pustulosis
• tachycardia
• oculogyric crisis

Drug Interactions

Drug interactions may change how your medications work or increase your risk for serious side effects. This document does not contain all possible drug interactions. Keep a list of all the products you use (including prescription/nonprescription drugs and herbal products) and share it with your doctor and pharmacist. Do not start, stop, or change the dosage of any medicines without your doctor's approval.

Tell your doctor or pharmacist if you are taking other products that cause drowsiness such as opioid pain or cough relievers (such as codeine, hydrocodone), alcohol, marijuana (cannabis), drugs for sleep or anxiety (such as alprazolam, lorazepam, zolpidem), muscle relaxants (such as carisoprodol, cyclobenzaprine), or other antihistamines (such as diphenhydramine, promethazine).

Check the labels on all your medicines (such as allergy or cough-and-cold products) because they may contain ingredients that cause drowsiness. Ask your pharmacist about using those products safely.

Do not use with any other antihistamines applied to the skin (such as diphenhydramine cream, ointment, spray) because increased side effects may occur.

Levocetirizine is very similar to hydroxyzine and cetirizine. Do not use these medications while using levocetirizine.

This medication may interfere with certain laboratory tests (including allergy skin testing), possibly causing false test results. Make sure laboratory personnel and all your doctors know you use this drug.