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What Is Synvisc?

What Is Synvisc?

Synvisc is an injection used to relieve knee osteoarthritis pain. It contains Hylan G‑F 20, a gel‑like substance similar to the body’s natural joint fluid, helping the knee move more smoothly and with less pain. It is given as a series of three weekly injections and must be administered by a healthcare professional.

Quick Facts About Synvisc

Quick Facts About Synvisc

Product NameSynvisc
Active IngredientHylan G-F 20
Drug ClassViscosupplementation agents
FDA Approval StatusFDA-approved to treat knee osteoarthritis pain
Available FormsPre-filled syringe
Strengths Available6 mL
Routes of AdministrationIntra-articular injection
Administration FrequencyOnce weekly for 3 weeks (standard Synvisc regimen)
Synvisc UsesKnee osteoarthritis pain relief treatment
Synvisc ContraindicationsHypersensitivity to hyaluronan or avian proteins (birds, feathers, eggs)

Knee joint infections or skin infections at the injection site
Synvisc StorageStore at room temperature, below 30°C (86°F)
Prescription RequiredRx only

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What Is Synvisc Used For?

What Is Synvisc Used For?

Synvisc is FDA-approved for:

  • Knee osteoarthritis pain relief treatment
How to Take Synvisc Injection for Knee Osteoarthritis Treatment?

How to Take Synvisc Injection for Knee Osteoarthritis Treatment?

If you are prescribed to use Synvisc for knee pain, follow these administration guidelines:

  • Synvisc must be injected into the knee joint by a trained healthcare professional.
  • The doctor will clean and sterilize the Synvisc injection site to reduce infection risk.
  • If there is excess fluid in the knee, the doctor may remove it first (joint aspiration).
  • This injection is given as 3 doses (2 mL each), 1 per week for 3 weeks.
  • During the injection, the doctor inserts a needle into the joint space and slowly injects the gel-like fluid.
  • After the injection, you may be asked to move your knee gently to help distribute the medication.
  • You must avoid jogging, heavy lifting, and prolonged standing for 48 hours after receiving the Synvisc injection. Light walking is usually fine.
Synvisc Dosing Information

Synvisc Dosing Information

Follow this Synvisc dosage guide table to treat knee osteoarthritis pain effectively:

ProductIndicationDosageAdministration ScheduleInjection Site
Synvisc (Hylan G-F 20)Osteoarthritis (OA) of the knee2 mL per injection1 injection weekly for 3 weeks (total = 3 injections)Intra-articular (into the knee joint)

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How Synvisc Works?

How Synvisc Works?

Synvisc works by replacing and improving the natural fluid inside your knee joint. In osteoarthritis, the synovial fluid (the fluid that cushions and lubricates the joint) becomes thinner and less effective. Synvisc contains hylan G‑F 20, a gel‑like substance similar to the body’s own hyaluronic acid. When injected into the knee, it helps restore the fluid’s shock‑absorbing and lubricating properties, reducing friction between bones. This makes movement smoother, eases pain, and can improve mobility for several months. In simple terms, Synvisc acts like a “cushion” inside the knee, helping the joint glide more comfortably again.

What Happens If I Miss a Synvisc Injection Dose?

What Happens If I Miss a Synvisc Injection Dose?

If you miss a Synvisc injection appointment, let your doctor know right away so it can be rescheduled. Since Synvisc is only given in a clinic, your provider will need to adjust the timing to keep the treatment plan for osteoarthritis pain effective.

What Happens If You Take Two Doses of Synvisc?

What Happens If You Take Two Doses of Synvisc?

Taking two doses of Synvisc close together is not recommended. However, Synvisc is always administered by a healthcare professional, and dosing errors are rare. If you are concerned that you may have received more than the recommended amount, contact the poison control center or your healthcare provider immediately. Do not wait for Synvisc overdosing symptoms to appear.

What Are the Side Effects of the Synvisc Injection?

What Are the Side Effects of the Synvisc Injection?

Here are some Synvisc injection side effects you may experience:

Common Side Effects of Synvisc InjectionRare or Serious Side Effects of Synvisc Injection
Pain at the injection siteSevere joint inflammation
Swelling in the kneeInfection at the injection site
Warmth or redness around the jointAllergic reaction (avian protein sensitivity)
Stiffness or reduced mobilityFluid buildup (large effusion)
Local bruisingContinuous or worsening pain or swelling

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What Are the Synvisc Warnings?

What Are the Synvisc Warnings?

When you consider the Synvisc for knee osteoarthritis pain, you must know about the following associated warnings:

  • You should not receive Synvisc if you have an infection in your knee or in the skin around the knee.
  • You should not use Synvisc if you are allergic to feathers, bird proteins, or egg products.
  • Synvisc should not be injected into veins or arteries, as this can cause serious side effects.
  • Synvisc is not recommended for use in joints other than the knee.
  • You should avoid activities like jogging or heavy lifting for 2 days after the injection.
What Are the Synvisc Precautions?

What Are the Synvisc Precautions?

  • Avoid using disinfectants containing QACs (quaternary ammonium compounds) for skin preparation. They can cause the hyaluronan to precipitate.
  • The safety of Synvisc has not been established in pregnant or breastfeeding women or children under 21.
  • After injecting this medication, if pain or swelling occurs, use an ice pack for 10-minute intervals.
  • While rare, a "pseudoseptic reaction" can occur, requiring rest and ice, usually resolving in 1-2 weeks.
Does Synvisc Need to Be Refrigerated?

Does Synvisc Need to Be Refrigerated?

Yes, Synvisc needs to be refrigerated to keep it stable and effective. It should be stored properly until a healthcare professional uses it. Follow these Synvisc storage guidelines:

  • Keep Synvisc injections refrigerated at 2°C-8°C (36°F-46°F) until use.
  • Do not freeze Synvisc syringes, as freezing can damage the product.
  • Store these injections in their original packaging to protect them from light.
  • Do not use Synvisc if it has been left out of the refrigerator for an extended period.
  • Always check the expiry date before use.
  • Synvisc should only be handled and prepared by trained medical staff.
What Medications Should I Avoid While Using Synvisc?

What Medications Should I Avoid While Using Synvisc?

Here are the Synvisc interactions you should know before starting knee osteoarthritis pain relief treatment:

  • Benzalkonium chloride (topical)
  • Cetylpyridinium (topical)
What Are Good Alternatives to Synvisc?

What Are Good Alternatives to Synvisc?

Consider the following Synvisc alternatives if this medication doesn’t provide knee osteoarthritis pain relief:

  • Durolane
  • Euflexxa
  • Orthovisc
  • Hyalgan
  • Supartz FX (five‑injection series)
  • NSAIDs such as Meloxicam
  • COX‑2 inhibitors such as Celebrex (celecoxib)
Why Buy Synvisc Online from Canada with Polar Bear Meds?

Why Buy Synvisc Online from Canada with Polar Bear Meds?

A high Synvisc cost makes the knee osteoarthritis pain treatment difficult for many patients. That is why people choose Polar Bear Meds. When you buy Synvisc online from Canada with us, you can save a lot compared to U.S. pharmacy prices. We offer Synvisc syringes at prices up to 80% lower, making treatment more affordable.

We source Synvisc from licensed Canadian pharmacies. New customers can save more with our Synvisc coupon code “WELCOMEPB10” to get 10% off. Synvisc orders arrive within 3-5 business days through our Xpress Post. Get a Synvisc prescription from your doctor today to buy with us.

Important Disclaimer

Important Disclaimer

This information is provided on this page for general educational purposes. This should not be considered as any medical advice, diagnosis, or treatment. Synvisc injections must always be prescribed and administered by a licensed doctor. Individual treatment plans, dosing schedules, and safety considerations may vary based on your medical condition, history, and overall health. Do not start, stop, or change Synvisc dosing without consulting your doctor. If you experience any side effects, allergic reactions, worsening pain, or unusual symptoms, seek medical attention immediately.

Common Questions About Synvisc

Common Questions About Synvisc

Side Effects

Side Effects

Dr. Jackson Miller

Medically Reviewed by Dr. Jackson Miller (M.D)

Dr. Jackson Miller is a board-certified medicine physician & hospitalist. He is a healthcare professional with a strong background in patient care. With years of experience and a patient-first approach, he believes the foundation of good health is a patient who feels informed and empowered. He contributes to medical content review, drawing on his background in clinical practice and patient education. He focuses on presenting health information in a clear, accurate, and accessible way to help readers make informed decisions. His work emphasizes clarity, evidence-based guidance, and understandable explanations of medical topics.

Find Dr. Jackson Miller on:LinkedIn

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