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What Is Cetirizine Dihydrochloride?

Cetirizine dihydrochloride, sometimes called cetirizine hydrochloride, refers to an antihistamine used to treat symptoms of allergies or hay fever, such as runny nose, itchy eyes and sneezing. Cetirizine dihydrochloride is available over-the-counter as Zyrtec.

  1. Dosage

    • Dosages differ for adults and children

      Adults and children over 6 years old should take no more than 10 mg of cetirizine dihydrochloride daily. Children under 6 should take no more than 5 mg daily. Patients over 65 should take no more than 5 mg daily.

    Side Effects

    • Common side effects in adults include fatigue, dry mouth and insomnia

      Common side effects in adults include fatigue, dry mouth and insomnia. Children sometimes experience pharyngitis, headaches and abdominal pain. Children under 2 years may exhibit fussiness, fatigue or irritability.

    Storage

    • Store medications in a dry, dark location between 68 and 77 degrees

      Store cetirizine dihydrochloride in a dry, dark location between 68 and 77 degrees Fahrenheit. Do not use if the inner seal is broken. Keep cetirizine dihydrochloride away from children.

    Warning

    • If an overdose occurs, call the Poison Control Center at 1-800-222-1222

      If an overdose occurs, call the Poison Control Center at 1-800-222-1222.

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