What is a Generic Drug?

A generic drug is a copy of the brand-name drug with the same dosage, safety, strength, quality, consumption method, performance, and intended use. Before generics become available on the market, the generic company must prove it has the same active ingredients as the brand-name drug and works in the same way and in the same amount of time in the body.

The only differences between generics and their brand-name counterparts is that generics are less expensive and may look slightly different (eg. different shape or color), as trademarks laws prevent a generic from looking exactly like the brand-name drug.

Generics are less expensive because generic manufacturers don't have to invest large sums of money to develop a drug. When the brand-name patent expires, generic companies can manufacture a copy of the brand-name and sell it at a substantial discount.

Zyrtec (Cetrizine)

Known as Reactine,Cirrus in the UK


Zyrtec (Cetrizine)


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Generic Equivalent - Zyrtec (Cetrizine)


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  • Product Details


    Zyrtec Allergy Medication

    Zyrtec (cetrizine)

    Zyrtec (Cetirizine)

    Zyrtec, or cetirizine, is a second generation antihistamine used in the treatment of hay fever, allergies, angioedema, and urticaria. This medicine works by blocking a natural substance, histamine that your body makes during an allergic reaction. It is also used to relieve allergic symptoms such as watery eyes, itching, and sneezing.

    Zyrtec generic can be easily purchased from Canada Pharmacy.


    Both Zyrtec medicine and Zyrtec OTC are to be taken orally, once daily or as prescribed by your doctor to achieve optimal results. Take it at the same time each day. It is recommended to swallow it whole and allow the tablet to dissolve on the tongue, with or without water.

    Inform your doctor if you experience allergic symptoms. If your hives worsen and last more than six weeks, seek medical attention immediately.


    Active: Cetirizine, Pseudoephedrine

    Inactive: Colloidal silicon dioxide, hypromellose, lactose monohydrate, etc.

    Fact Table




    US FDA


    Well-absorbed (greater than 70%)

    Legal status


    Chemical Name


    Elimination half-life

    Mean: 8.3 houts, Range: 6.5-10 hours

    Dosage (Strength)

    10mg (40 or 100 tablets), Syrup (100mL)


    Consult a doctor


    Zyrtec, Zyrtec Allergy, Children's Zyrtec Allergy, Children's Zyrtec Hives Relief

    Protein binding


    PubChem CID






    ATC code






    Routes of administration

    By mouth


    Some medical conditions coupled with Zyrtec may result in adverse reactions. To avoid such cases, inform your doctor if you have:

    • A history of liver and kidney diseases
    • An enlarged prostate and difficulty urinating
    • Unusual hives, colored, bruised or blistered
    • Known allergies
    • Pregnant or breastfeeding
    • Diabetes
    • An addiction, such as that of alcohol and marijuana.

    As this drug may cause dizziness, you are cautioned to avoid activities such as driving. You are also advised not to take this medication with other antidepressants as the risk of seizures may increase. Weigh the risks and benefits with your specialist.

    It is essential that you routinely get medical tests, such as that of kidney/liver functions and complete blood count. The liquid equivalent of Zyrtec may contain sugar; thus caution is advised if you suffer from diabetes.


    Side Effects

    This medication is not without any side effects, but some side effects such as dry mouth, stomach pain, drowsiness, dizziness, nausea, diarrhea, and fatigue can be expected as your body adjusts. If you experience the following persistently, consult your doctor:

    • Tingling of arms/legs
    • Easy bleeding and bruising
    • Signs of infections such as fever and sore throat
    • Painful and bloody urine
    • Severe abdominal pain
    • Weight loss
    • Eye pain, vision disruption
    • Signs of kidney issues
    • Rash
    • Persistent vomiting and nausea

    Allergic reactions to Zyrtec are rare but if you experience symptoms like rashes, itching, swelling or trouble breathing; inform your specialist immediately.

    IMPORTANT NOTE: The above information is intended to increase awareness of health information and does not suggest treatment or diagnosis. This information is not a substitute for individual medical attention and should not be construed to indicate that use of the drug is safe, appropriate, or effective for you. See your health care professional for medical advice and treatment.

    Product Code : 19

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