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.

Acarizax (Hydroxyzine Hydrochloride) Sublingual


Acarizax (Hydroxyzine Hydrochloride) Sublingual

Prescription Required


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  • Product Details


    Acarizax is a prescription immunotherapy drug that is used to reduce allergic reactions of a person to American dust mites and European dust mites. The tablets contain standardized allergen extract from dust mites Dermatophagoides farinae and Dermatophagoides pteronyssinus.

    Acarizax is used for the treatment of patients with IgE-mediated allergy symptoms. It works by causing an antibody response with an increase in IgG, which then competes with IgE in the binding to allergens, which reduces the immune response.

    The treatment typically begins working in about four weeks.


    The usual dosage is one tablet by mouth once daily. Your prescriber may modify the dosage.

    The tablet is a sublingual tablet that should be placed under the tongue and allowed to dissolve. Do not chew or swallow the tablet. Remove the tablet from the blister pack with dry fingers and place it under the tongue immediately.

    Do not eat or drink anything for five minutes after administration.


    The active ingredient in Acarizax is an allergen extract from house dust mites (HDM).


    There are no known significant interactions.


    The effects may take 8-14 weeks to become apparent after starting treatment. If there is no effect after one year, then treatment should be stopped.

    Acarizax is not recommended for patients under 18 years of age for allergic asthma or under 12 years of age for allergic rhinitis.

    Side Effects

    The most common side effects may include:

    • Anaphylaxis
    • Chest discomfort
    • Diarrhea
    • Dry throat
    • Dysgeusia
    • Dyspepsia
    • Dysphagia
    • Eosinophilic esophagitis
    • Erythema of skin
    • Eye pruritus
    • Gastroesophageal reflux disease
    • Glossalgia
    • Hypersensitivity reaction
    • Laryngeal edema
    • Lip pruritus
    • Mouth edema
    • Mouth pain
    • Nausea
    • Oral itching
    • Oral mucosa ulcer
    • Oral mucosal erythema
    • Oral paresthesia 
    • Oropharyngeal pain
    • Pharyngeal edema
    • Pharyngeal erythema
    • Pruritus of the ear 
    • Sneezing
    • Stomach pain
    • Stomatitis
    • Swelling of lips
    • Swollen tongue
    • Throat irritation
    • Tongue pruritus
    • Tongue ulcer
    • Upper respiratory tract infection
    • Urticaria
    • Vomiting


    Acarizax [package insert]. Australia: Seqirus Pty Ltd; 2022.

    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 : 13701

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