Ostenil Tendon

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Medically reviewed

Laura Arias

Last updated on 22/12/2025

This page provides general, reference-level information compiled from official medical sources. It is not a substitute for professional medical advice, diagnosis, or treatment. For decisions about your health, please consult a qualified healthcare professional.

Overview of Ostenil Tendon

Quick Facts

Property Description
Active Ingredient Sodium Hyaluronate (2.0%)
Form Sterile Solution for Injection (pre-filled syringe)
Pharmacological Class Viscosupplement / Biopolymer Preparation
Route of Administration Intratendinous or Peritendinous injection
Origin Biological Origin (via biofermentation)

What is Ostenil Tendon and How is it Classified?

Ostenil Tendon is a sterile, highly purified Sodium Hyaluronate solution classified as a viscosupplement and an injected medical device, not a traditional pharmaceutical drug. The product's core identity is defined by its physical mode of action, aiming to restore mechanical function. The active component, Sodium Hyaluronate (HA), is the sodium salt of naturally occurring Hyaluronic Acid, a key biopolymer and an analogue of an endogenous substance found in soft tissues. The solution, containing a specific 2.0% concentration of Sodium Hyaluronate, is supplied in a pre-filled syringe as a solution for injection for targeted intratendinous or peritendinous administration. The Hyaluronic Acid is of biological origin, produced via biofermentation to ensure it is highly purified, non-animal derived, and apyrogenic, thereby maximizing its biocompatibility.


What is the Purpose of a Sodium Hyaluronate Viscosupplement?

The general purpose of this product is to use the principle of viscosupplementation to address mechanical dysfunction and irritation in affected tendons. This physical intervention aims to restore the natural viscoelasticity of the fluid layers surrounding the tendon. By providing a protective, lubricating layer, the product establishes a low-friction environment. The efficacy of hyaluronic acid preparations in improving tendon glide is clinically recognized in orthopaedic practice. The application of hyaluronic acid preparations to tendons can help improve tendon gliding and reduce friction. This friction reduction and physical cushioning helps alleviate chronic tendon pain and supports the tendon's ability to regain its functional capacity in typical scenarios, such as recovery from overuse. Unlike treatments based on systemic chemical effects, the use of this Sodium Hyaluronate solution provides targeted, mechanical support to the soft tissue environment.

What side effects are possible with Ostenil Tendon?

Possible Side Effects and Safety Information

The official safety profile for this Sodium Hyaluronate viscosupplement is structured around its classification as a locally administered medical device. The documented safety data focuses on local physical reactions associated with the injection, consistent with official regulatory documents like the Summary of Product Characteristics (SmPC).


Adverse Reaction Scope

The primary adverse reactions reported are local secondary phenomena at the injection site, which are classified in regulatory documents as occurring in very rare cases (less than 1 in 10,000 patients). These reactions include pain, swelling, redness, a feeling of heat, bruising, discomfort, and itching. These effects are generally transient (short-lived).

Category Safety Entity Regulatory Classification
Common/Expected Reactions Local pain, Swelling, Redness, Bruising, Discomfort Local secondary phenomena, generally transient.
Serious Adverse Reactions Infection, Hypersensitivity Very rare cases (as with all invasive treatments)

Safety Restrictions and Considerations

Official regulatory documents state specific limitations and constraints regarding the use of this product:

  • Contraindications: The product is contraindicated in patients with a known hypersensitivity to any of its constituents.
  • Invasive Risk: As with any invasive procedure, a very rare risk of infection at the injection site is documented.
  • Population Constraints: The treatment is not recommended for use in children, pregnant women, or lactating women, due to a lack of available safety data in these populations.
  • Administration Limits: The injection is not recommended in areas of acute trauma and should avoid nerve lesions and blood vessels.

Overdose and Emergency Response

Overdose and when to seek help

The regulatory documentation for Ostenil Tendon, which is classified as an injected medical device containing Sodium Hyaluronate, does not define a systemic pharmacological overdose profile. Because the product is administered locally, official regulatory statements focus on severe local adverse events and mandatory reporting requirements rather than systemic toxicity.


Documented Overdose-Related Manifestations and Actions

Classification Official Regulatory Statement
Documented Manifestations No systemic overdose symptoms are documented. Manifestations are limited to severe local secondary phenomena associated with the injection, including persistent pain, swelling, redness, and discomfort at the site.
Serious Outcomes The most severe official consequence is a Serious Incident, with Infection listed as a very rare but potential complication from the invasive procedure.
Emergency Actions Required Any event classified as a Serious Incident must be reported to the manufacturer and the local competent authority, as mandated by the regulator.

When to Seek Urgent Medical Help

Immediate medical attention is officially required for any persistent, severe local effects, or for signs suggestive of Infection following the procedure. The official profile reflects that the urgency of seeking help is strictly tied to the manifestation of the most severe documented local outcomes, particularly those that may escalate or require specific procedural management. No specific antidote is known or documented in the official labeling.

Therapeutic Uses of Ostenil Tendon

What Ostenil Tendon Treats: Main Uses and Benefits

The primary role of Ostenil Tendon is to provide targeted, supportive management for symptoms associated with various tendon disorders, or tendinopathies. It is applied across domains where additional symptomatic support is needed to help manage the discomfort and functional strain related to these conditions. It is relevant for easing discomfort and functional strain and is commonly used across conditions presenting with localized discomfort, such as those affecting the Achilles, rotator cuff, or patellar tendons.


Managing Symptoms of Tendon Discomfort

This therapeutic domain involves the management of certain distressing symptoms and physical discomfort arising from irritated or strained tendons. It is used in areas where short-term symptom management is appropriate and contributes to easing the overall symptom load during periods of heightened symptoms. It is relevant for managing symptoms that interfere with daily comfort.

“This therapy assists with maintaining functional stability, supporting patients during episodes of heightened discomfort.”

Addressing Symptoms that Affect Function

Ostenil Tendon is relevant in contexts where groups of symptoms create noticeable functional strain and interference with daily comfort and stability. The product is commonly used across conditions characterized by periods of heightened symptoms where symptom clusters may become intense or disruptive. It helps address symptoms that create noticeable physiological strain and is helpful in situations requiring temporary assistance in symptom stabilization.


Quick Fact: Relevant for Symptom Management


Eligibility and Restrictions for Use

Who can and cannot use Ostenil Tendon?

The eligibility for using Ostenil Tendon is strictly defined by regulatory documentation, which outlines absolute contraindications and use restrictions for specific populations. The general eligible population consists of adults who do not meet any exclusion criteria.

Absolute Contraindication (Must Not Use)

Ostenil Tendon is formally contraindicated in patients with a known or ascertained hypersensitivity or allergy to any of the product’s constituents. Individuals with such a history must not use this product under any circumstances.

Restricted and Non-Recommended Use

Use is designated as not recommended for several populations, primarily due to insufficient clinical evidence regarding safety in these specific groups.

  • Children: Treatment is not recommended in the pediatric population.
  • Pregnancy and Lactation: Use is not recommended in pregnant women or lactating women.
  • Acute Clinical Status: Use is also not recommended in cases involving acute traumas to the tendon.

No specific restrictions related to organ function, such as hepatic or renal impairment, are documented in the official labeling.

What should I know about interactions with other medicines?

Interactions with other medicines and products

The official regulatory profile for Ostenil Tendon is primarily defined by a specific procedural constraint rather than systemic drug-drug interactions. The product is a locally administered viscosupplement, and its interaction map reflects this physical mode of action, resulting in minimal interaction risk outside of the injection site.


Procedural Incompatibility and Restrictions

The most critical interaction constraint documented in official regulatory sources involves topical agents used during the injection procedure.

  • Interacting Substances: Disinfectants containing Quaternary Ammonium Salts (QAS), such as benzalkonium chloride or cetylpyridinium, must not be used concurrently with the injection.
  • Restriction: The co-administration of QAS-based disinfectants is strictly prohibited because these salts cause a physical/chemical incompatibility resulting in the precipitation of the sodium hyaluronate solution. This procedural restriction is mandatory to ensure the product’s integrity and correct delivery.

Absence of Systemic Drug Interactions

Due to the product's local, intratendinous or peritendinous route of administration and its physical mode of action, the regulatory profile documents an absence of systemic interactions:

  • Pharmacokinetic Interactions: No interactions affecting metabolic enzymes (e.g., CYP450) or drug transport proteins are formally documented.
  • Pharmacodynamic Interactions: Official labeling notes that no information has been notified regarding additive or synergistic effects with other co-administered therapeutic agents, including oral anti-inflammatory drugs.
  • Substance Interactions: No interactions with food, alcohol, or herbal products are documented.

Mechanism of Action

The Dual Mechanism of Ostenil Tendon

The mechanism of action for Ostenil Tendon relies on a dual-approach: mechanical/structural support and biological/modulatory signaling, both localized to the peritendinous tissue.


Contribution to Tendon Viscoelasticity and Lubrication

This domain covers the structural mechanism where the high molecular weight sodium hyaluronate (HA) is introduced into the tendon sheath. The HA provides viscosupplementation, which increases the viscoelastic properties of the peritendinous fluid and contributes to a lubricating boundary layer. This action influences the mechanical environment of the tendon to limit the effect of friction and stress on local tissue structures.


Modulating Local Cellular Homeostasis

This domain describes the biological mechanism where the HA interacts with local cell receptors (like CD44 on tenocytes). This interaction influences cellular signaling via receptors, which modulates the release of local pro-inflammatory mediators. The biological effect modulates the local inflammatory cascade and influences tenocyte signaling, resulting in an attenuation of inflammatory mediator release within the local tissue environment.

Dosage and Administration Information

Instruction Map: How to use Ostenil Tendon — Administration Guidelines

Administration Scope Guideline
Route of administration Peritendinous injection (around the affected tendon) or Intrasheath injection (into the affected tendon sheath).
Dosing schedule The course consists of two injections. The dose per session is the full contents of one pre-filled syringe (2.0 ml) per treated area (40 mg of Sodium Hyaluronate).
Preparation requirements (if applicable) The product is for single use only and must be administered immediately after opening. A suitable needle (e.g., 25 to 27 G) must be attached, and any air bubble must be removed prior to injection.
Age-group administration rules Not recommended for use in children, pregnant women, or lactating women. Use is also not recommended in cases of acute trauma.
Special procedural conditions Must be administered by a physician trained in the technique. Injection should be instilled accurately and may be performed under imaging control, such as ultrasound.

Instruction Classifications (High-Level)

Classification Description
Administration method type Specialized Injection (viscoelastic solution).
Frequency pattern Weekly (once per week) for the initial course; Repeat treatment cycles may be administered as required.

Resulting Procedural Structure

Step sequence:

  • A trained physician selects the affected tendon area for treatment.
  • One pre-filled 2.0 ml syringe is prepared for single use only.
  • The entire 2.0 ml dose is accurately administered via peritendinous or intrasheath injection into or around the affected tendon.
  • The injection is repeated once more one week later, completing the required two-injection course.

Connection to the overall use protocol: The instructions establish a highly structured, two-injection, once-weekly treatment protocol that is entirely dependent on procedural accuracy. This standardized protocol defines a fixed 40 mg dose delivered via a specialized localized injection route and requires administration by a trained medical professional. The structure permits the initiation of repeat treatment cycles as needed, provided the documented constraints on use are observed.

Recent Clinical Evidence

Research evidence / Overview of studies for Ostenil Tendon

The research on Sodium Hyaluronate solutions for injection, classified as viscosupplements, has primarily explored conditions characterized by fluctuating or episodic manifestations related to various tendon problems. The evidence base is built upon formal clinical trials and scientific reviews that explore changes in pain and function over defined periods, consistent with the scope of supportive symptomatic management.


Evidence for Use in Lateral Epicondylitis (Tennis Elbow)

Research exploring the use of this viscosupplement for Lateral Epicondylitis (often called Tennis Elbow) has centered on Randomized Controlled Trials (RCTs). These studies were used in research exploring how symptoms change over time by comparing the injection against control groups, such as placebo or other treatments. The populations studied were typically adult patients whose symptoms, which are often characterized by functional limitations, had become chronic or had not responded to prior conservative management.

Studies monitored patient-reported outcomes describing perceived discomfort. Research focused on outcomes related to physical discomfort and outcomes reflecting daily functioning or activity level. Findings describe patterns observed in the studies regarding how symptoms evolved in the observed populations, with various reports describing measurements against comparison groups.


Evidence for Use in Achilles Tendinopathy

For Achilles Tendon problems, research examined the injection mostly through RCTs and other observational studies. These studies explored short-term symptom changes in adult patients with chronic symptoms and conditions involving periods of heightened symptoms. The research focused on outcomes capturing phases of heightened symptom activity, using specialized functional scales to monitor patient-reported outcomes describing perceived discomfort and functional status.

Studies focusing on episodes where symptoms become more noticeable reported how symptoms evolved in the observed populations, indicating patterns related to changes in both pain and functional scores measured over time. Research provides insight into short-term changes, but the role of this intervention compared to other therapies is an ongoing area of research.


Research Gaps and What Remains Uncertain

Key research limitation frames include the fact that comparative evidence is lacking against a full range of non-injection conservative treatments. Furthermore, sample sizes were modest in many key trials, and there is limited information for long-term outcomes beyond one year. The findings were mixed in some systematic reviews when comparing the solution to other injections, and therefore, certainty remains low regarding the observed measurements against comparison therapies. Data for certain groups, such as children, remain insufficient.

Frequently Asked Questions (FAQ)

Common questions about Ostenil Tendon (FAQ)

Q: What is the difference between Ostenil Tendon and the original Ostenil injection?

According to the official product information, Ostenil Tendon is specifically formulated and indicated for the treatment of painful tendon disorders. The original Ostenil injection, by comparison, is officially indicated for treating the symptoms of osteoarthritis in synovial joints. These differing indications mean the products are intended for use in different clinical areas.


Q: How soon after the second injection can I expect to feel pain relief and improvement?

Official studies supporting the use of this product show that improvements in pain and function are often observed gradually. Studies have observed that improvement in pain and function may continue to progress for a period of up to several months following the completion of the two-injection course. Individual responses to the treatment may vary.


Q: Is Ostenil Tendon effective for shoulder pain, specifically rotator cuff tendinopathy?

Official product information indicates that this product addresses general tendinopathies. Furthermore, supporting clinical evidence includes studies that have investigated its use in patients with chronic shoulder pain, such as those associated with rotator cuff tendinitis.


Q: Can Ostenil Tendon be used for an acute tendon tear/injury, or only chronic problems?

Official documents state that the product is not recommended in cases involving acute trauma to the tendon. The available clinical data primarily supports use in adult patients experiencing chronic or persistent tendon symptoms that have not responded to prior conservative management.


Q: Why do they prohibit the use of certain disinfectants like benzalkonium chloride?

The use of certain disinfectants, specifically those containing Quaternary Ammonium Salts (QAS) like benzalkonium chloride, is strictly prohibited during the procedure. This mandatory restriction is in place because these salts cause a physical/chemical incompatibility that results in the precipitation (clumping) of the sodium hyaluronate solution, which compromises the product’s integrity and correct delivery.

How should Ostenil Tendon be stored and disposed of?

Storage and Disposal Requirements

Official regulatory documents specify mandatory conditions for the storage and disposal of Ostenil Tendon to maintain product integrity and sterility.

Requirement Stated Condition
Storage Temperature Store between 2 C and 25 C.
Protection Store in a dry place and protected from light.
Stability Do not use after the expiry date.
Integrity Do not use if the sterile pack is damaged.
Child Safety Keep out of reach of children.
Post-Opening For single use only; discard any unused solution immediately.
Disposal Place the used syringe immediately in a sharps disposal container.
Waste Restriction Do not throw away in household waste; follow community guidelines for medical sharps disposal.

The product must be maintained within the specified temperature range and protected from light. As a sterile injectable, the single-use syringe requires immediate disposal in a sharps container after use, with any unused contents also requiring discard to ensure sterility is not compromised. Disposal must follow community guidelines for medical sharps and should not be placed in household waste.

Attention! Always consult to a doctor or pharmacist before using pills or medicines.

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