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.

Synvisc (Hylan GF 20)


Synvisc (Hylan GF 20)

Prescription Required


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  • Product Details


    SYNVISC (Hylan G-F 20) is a medication prescribed to treat osteoarthritis pain in patients who have tried and been unsuccessful with other options like topical treatments and over-the-counter analgesics.

    Osteoarthritis manifests as pain in joints, including knees, hips, facet joints, fingers, and shoulders. SYNVISC injection can be used to relieve pain from osteoarthritis of the knee.


    SYNVISC injection is administered by a medical professional in a clinic or hospital setting. The medication is administered using an aseptic technique directly into the knee joint via intra articular injection.

    Your healthcare professional will administer SYNVISC once weekly for three injections.


    SYNVISC contains polymers of Hylan A and Hylan B, which are derivatives of hyaluronan. SYNVISC contains cross-linked chains of hyaluronan, which contains polymers of sodium-glucuronate-N-acetylglucosamine. Hyaluronan is found naturally in joints and is distributed in the connective, epithelial, and neural tissues of the body.

    SYNVISC should be stored at room temperature and protected from light in the original packaging.


    SYNVISC should only be used for osteoarthritis of the knee and should not be injected in other joints.

    SYNVISC is made using chicken combs. Use SYNVISC with caution if you are allergic to avian proteins, feathers, or egg products.

    Do not use SYNVISC if you have a known hypersensitivity to hyaluronan preparations.

    Do not have SYNVISC injection injected if you have an active infection or inflammation of the knee.

    Side Effects

    Some of the adverse effects of SYNVISC may include:’

    • Chills
    • Difficulty breathing
    • Dizziness
    • Fever
    • Fluid build-up around the knee
    • Headache
    • Heat
    • hives
    • Itching
    • Muscle pain
    • Pain
    • Rash
    • Redness
    • Swelling
    • Thrombocytopenia

    Speak with your doctor for a full list of side effects.

    SYNVISC can only be administered by a healthcare professional, so before purchase, ensure that your doctor or another healthcare provider can safely administer the medication to you. SYNVISC requires a prescription from a licensed healthcare professional.


    1. Synvisc [package insert]. Ridgefield, NJ 07657: Genzyme; 2014.

    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 : 20

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