Gelsyn-3 is administered as a series of intra-articular injections directly into the knee joint by a qualified healthcare professional, such as an orthopedic surgeon, rheumatologist, or sports medicine physician. It is not intended for self-administration.
- Preparation: The healthcare provider will prepare the injection site using strict aseptic (sterile) technique to minimize the risk of infection. If there is a significant build-up of fluid (effusion) in the knee joint, it may be aspirated (removed) prior to injecting Gelsyn-3.
- Dosage: Gelsyn-3 is typically administered as three (3) weekly injections. Each injection usually contains 16.8 mg of sodium hyaluronate in 2 mL.
- Administration: The contents of the pre-filled syringe are carefully injected into the synovial space of the affected knee. If both knees require treatment, a separate syringe of Gelsyn-3 will be used for each knee.
- Post-Injection Care:
- Patients are usually advised to avoid strenuous activities, heavy lifting, or prolonged weight-bearing activities (like jogging, tennis, or standing for more than an hour) for at least 48 hours following each injection. This allows the product to disperse and integrate into the joint fluid effectively and reduces the risk of post-injection flare-ups.
- Temporary pain, swelling, warmth, or redness at the injection site is common. Applying ice packs and using simple over-the-counter pain relievers (like acetaminophen) as advised by the doctor can help manage these symptoms.
- Treatment Course: The full course of treatment involves three injections, administered one week apart.
Gelsyn-3 works through a process called viscosupplementation, which aims to restore the natural properties of the synovial fluid within the knee joint.
- Replenishing Hyaluronic Acid: In a healthy knee joint, synovial fluid, rich in high molecular weight hyaluronic acid, acts as a lubricant and shock absorber, allowing the cartilage surfaces to glide smoothly over each other. In osteoarthritis, the hyaluronic acid in the synovial fluid becomes degraded and its concentration decreases, leading to increased friction, reduced shock absorption, and pain.
- Restoring Viscoelasticity: When Gelsyn-3 is injected into the knee joint, it supplements the existing synovial fluid with highly purified sodium hyaluronate. This helps to restore the viscoelastic (viscous and elastic) properties of the joint fluid, making it more effective at:
- Lubricating the Joint: Reducing friction between the articulating bone surfaces, which are typically covered by damaged cartilage.
- Absorbing Shock: Providing a cushioning effect during weight-bearing activities, protecting the remaining cartilage from further wear and tear.
- Anti-inflammatory Effects (Potential): While its primary action is mechanical, hyaluronic acid may also exert some anti-inflammatory effects within the joint, helping to reduce pain and swelling.
- Stimulating Endogenous Production (Theory): Some theories suggest that exogenous hyaluronic acid might also stimulate the synovial cells within the joint to produce more and higher-quality natural hyaluronic acid, contributing to longer-term benefits.
By improving the mechanical environment within the joint, Gelsyn-3 helps to alleviate pain and improve knee function in patients with osteoarthritis.
While generally well-tolerated, Gelsyn-3 injections can cause side effects, most commonly localized to the injection site.
- Common Local Side Effects (usually mild and temporary):
- Injection site pain: Discomfort or pain where the needle was inserted.
- Joint swelling: Swelling around the knee, which can range from mild to moderate.
- Joint effusion: Accumulation of excess fluid within the joint.
- Joint stiffness.
- Warmth or redness at the injection site.
- Bruising.
- Less Common / Rare Side Effects:
- Arthralgia (joint pain): Pain in the knee joint itself, which can sometimes worsen after injection before improving.
- “Pseudo-septic” reaction: A rare, acute inflammatory reaction resembling a joint infection (characterized by severe pain, swelling, warmth, and redness) but without the presence of bacteria. It requires prompt medical evaluation to rule out true infection.
- Allergic reactions: Although rare, systemic allergic reactions (e.g., rash, hives, itching, swelling of face/tongue/throat, difficulty breathing) are possible, especially in individuals with known hypersensitivity to avian products (if derived from poultry) or bacterial proteins (if derived from fermentation).
- Joint infection: A very rare but serious complication of any intra-articular injection. Signs include severe pain, fever, chills, significant redness, and warmth. This requires immediate medical attention.
- Headache.
- Nausea.
Any persistent or severe side effects, or signs of infection, should be reported to the healthcare provider immediately.
Several important warnings and precautions are associated with the use of Gelsyn-3 to ensure patient safety and optimize treatment outcomes.
- Hypersensitivity/Allergies: Gelsyn-3 is contraindicated in patients with known hypersensitivity (allergy) to sodium hyaluronate preparations. Given that it’s often derived from bacterial fermentation (Streptococci), patients with a known allergy to Gram-positive bacterial proteins should use it with caution. Some hyaluronic acid products might be avian-derived, so patients with allergies to avian products (e.g., feathers, eggs, poultry) should inform their doctor, though Gelsyn-3 is generally not avian-derived.
- Knee Joint Infection/Skin Conditions: Do not inject Gelsyn-3 into the knees of patients who have active infections in the knee joint or skin diseases/infections in the area of the injection site, as this significantly increases the risk of joint infection.
- Concomitant Use of Disinfectants: Do not use disinfectants containing quaternary ammonium salts (like benzalkonium chloride) for skin preparation before injection, as they can cause precipitation of sodium hyaluronate.
- Injection Site: Gelsyn-3 should be injected only into the synovial space. It must not be injected intravascularly (into a blood vessel) or extra-articularly (outside the joint space or into the synovial tissue/capsule). Proper injection technique is crucial.
- Joint Effusion: If significant joint effusion (excess fluid in the knee) is present, it should be removed (aspirated) prior to the injection of Gelsyn-3 to ensure proper distribution and effectiveness of the product.
- Post-Injection Activity: Patients should be advised to avoid strenuous activities or prolonged weight-bearing for at least 48 hours after each injection to minimize potential complications and allow the product to settle.
- No Established Safety in Certain Populations: The safety and effectiveness of Gelsyn-3 have not been formally established in pregnant or lactating women, or in children. Its use in these populations should be carefully considered by a physician.
- Severity of Osteoarthritis: While effective for mild to moderate OA, patients with very severe (“bone-on-bone”) osteoarthritis may have less benefit from viscosupplementation.
As an intra-articular injection that acts locally within the knee joint with minimal systemic absorption, Gelsyn-3 generally has few significant drug interactions with systemically administered medications.
- Quaternary Ammonium Salts: It is important not to use disinfectants containing quaternary ammonium salts (such as benzalkonium chloride) for skin preparation prior to injection, as these can cause precipitation of the sodium hyaluronate, which may affect the product’s integrity or effectiveness.
- Other Intra-Articular Injections: The safety and efficacy of concomitant administration of Gelsyn-3 with other intra-articular injectables (e.g., corticosteroids or other viscosupplements) have not been fully established. Healthcare professionals typically avoid co-administration or ensure sufficient time between injections of different substances.
- Local Anesthetics: A local anesthetic may be used at the injection site to minimize discomfort during the procedure. This is a standard medical practice and not considered an adverse interaction.
- Systemic Medications: No known direct interactions with oral or other systemic medications are typically noted, as Gelsyn-3 remains primarily within the joint space and is metabolized locally.
Patients should always inform their healthcare provider about all medications, supplements, and other treatments they are receiving to ensure comprehensive care.
Gelsyn-3 is administered as a specific course of injections under medical supervision.
- Standard Dosage: Each pre-filled syringe contains 2 mL of solution, delivering 16.8 mg of sodium hyaluronate.
- Frequency and Course: The standard course of treatment involves three (3) intra-articular injections into the knee, administered one week apart. So, a patient receives one injection per week for three consecutive weeks.
- Bilateral Treatment: If both knees are affected by osteoarthritis and indicated for treatment, a separate 2 mL syringe of Gelsyn-3 should be used for each knee for each injection.
- Repeat Treatment: The safety and effectiveness of repeat treatment courses of Gelsyn-3 have not been specifically established in clinical trials, although viscosupplementation can be repeated for pain relief in some patients, typically after a period of several months, as determined by the treating physician.
- Prescription Requirements
Gelsyn-3 (injection) is a prescription-only medical device. It is not available over-the-counter.
- Licensed Healthcare Professional Administration: Due to its nature as an intra-articular injection requiring precise technique and sterile conditions, Gelsyn-3 must be administered by a qualified and licensed healthcare professional (e.g., orthopedic surgeon, rheumatologist, sports medicine physician).
- Medical Evaluation and Diagnosis: A prescription for Gelsyn-3 is issued only after a thorough medical evaluation by a physician to confirm the diagnosis of knee osteoarthritis and determine if the patient meets the criteria for viscosupplementation (e.g., failure to respond to conservative treatments).
- Controlled Environment: The injection procedure typically takes place in a clinical setting (doctor’s office, clinic, or hospital) equipped for sterile injections.
- Availability in Pakistan: As of July 2025, the availability of specific brand-name viscosupplements like Gelsyn-3 can vary in Pakistan. While hyaluronic acid injections for osteoarthritis are generally available, a patient interested in Gelsyn-3 would need to consult a local orthopedic surgeon or rheumatologist to ascertain its current availability in Pakistan and if it’s the most appropriate treatment option for their condition.
