Ostisave

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Medically reviewed

Marina Burgos

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 Ostisave

Quick Facts

Property Description
Active Ingredient Ademetionine (S-adenosyl-L-methionine, SAM-e)
Form Enteric-coated tablets; Lyophilized powder for injection
Pharmacological Class Hepatoprotector, Essential Metabolite
General Purpose Metabolic support, cell membrane maintenance, and detoxification
Origin Synthetic compound derived from an endogenous substance

What is Ostisave: Identity and Pharmacological Class

Ostisave is a pharmaceutical preparation whose active substance is Ademetionine, which is fundamentally classified as a hepatoprotective agent and an essential metabolic compound. The active ingredient is the International Nonproprietary Name (INN) for S-adenosyl-L-methionine (SAM-e). Ademetionine is an essential metabolite, a molecule naturally produced by the human body, positioning the drug as a supportive therapy. Ademetionine is involved in key biochemical reactions, and its role as a precursor to vital molecules like Glutathione is well-recognized. Due to its involvement in key metabolic pathways, the substance is also available under other trade names, such as Heptral and Samyr, further demonstrating its clinical recognition.

Composition and Forms: Is Ostisave a Natural Substance?

The composition of Ostisave centers on a synthetic preparation of an endogenous substance that occurs naturally within the human body. Ademetionine, the single active ingredient, is typically supplied as a stabilized salt, such as Ademetionine 1,4-butanedisulfonate. The medicine is manufactured in two primary dosage forms optimized for systemic absorption: the enteric-coated tablet for oral administration and a sterile lyophilized powder for reconstitution into a solution for injection. The enteric coating is a critical, differentiating feature of the oral form, specifically designed to protect the acid-sensitive Ademetionine from gastric breakdown, ensuring its optimal bioavailability in the small intestine.

General Purpose and Core Metabolic Role

The general purpose of Ostisave is to provide the body with a vital compound necessary for promoting cell repair, membrane stability, and specific detoxification pathways. Ademetionine acts as a crucial methyl group donor in transmethylation reactions, processes that are foundational for the synthesis of key molecules, including phospholipids. Ademetionine demonstrates supportive properties in liver metabolism. By supporting these fundamental biochemical pathways, Ostisave aids organs, especially the liver, in maintaining their function and resilience when the body's natural metabolic capacity may be compromised, aligning with its classification as a Hepatoprotector.

What side effects are possible with Ostisave?

Possible Side Effects and Safety Information

Ademetionine (Ostisave) is associated with adverse reactions that regulatory bodies categorize by frequency. The most common adverse reactions reported involve the Gastrointestinal and Nervous system organ classes. According to official labeling, these frequently observed effects include abdominal pain, diarrhea, nausea, headache, anxiety, and insomnia.

Less frequently, classified as uncommon or rare, are events such as allergic skin reactions, dizziness, and effects at the injection site. Serious, though uncommon, adverse reactions documented in regulatory sources include severe hypersensitivity events like anaphylactic reactions and angioedema, which represent a risk to the Immune System.

Official Safety Constraints

The medicine is subject to specific safety limitations defined in its labeling. It is contraindicated in patients with a known hypersensitivity to the active substance or in individuals with genetic defects that affect the methionine metabolic cycle, such as homocystinuria. Use is also not recommended in patients with bipolar disorder due to official reports of mood switching.

Caution is advised regarding use in older adults, where treatment should typically begin at a lower dosage, and in patients with renal impairment due to limited safety data. The label further notes a requirement for caution when used alongside serotonergic medicines, such as certain antidepressants, due to the documented potential for Serotonin Syndrome.

Overdose and Emergency Response

Overdose and When to Seek Help

The overdose profile for this medication is defined by the possibility of adverse effects occurring when a dose higher than the prescribed amount is ingested. Overdose symptoms documented in available information are generally limited to non-severe, transient effects, primarily affecting the gastrointestinal and nervous systems.


Overdose Manifestations Physiological Systems Affected
Stomach discomfort/pain Gastrointestinal
Diarrhea Gastrointestinal
Dizziness Nervous System

Required Emergency Actions

The immediate action required in a suspected overdose situation is to seek urgent medical attention. Official instructions indicate that a healthcare professional or hospital should be contacted without delay.

When to Seek Immediate Medical Help (Label-Derived Phrasing Only):

  • If you suspect you have taken an overdose of Ostisave.
  • If you think you have taken too much of the tablet.
  • If the reported symptoms of overdose (stomach discomfort, diarrhea, or dizziness) persist after the event.

Cases of overdose with the active substance in Ostisave are reported to be rare. Management typically involves monitoring the patient and providing supportive care as required. There are no specific population-based overdose risks or unique antidote procedures explicitly detailed in the labeling beyond these general instructions for seeking help.

Therapeutic Uses of Ostisave

What Ostisave Treats: Main Uses and Benefits

Ostisave (Ademetionine) is commonly used across three key therapeutic domains that involve conditions marked by heightened symptoms and symptomatic discomfort. Its applications are relevant in the supportive care of chronic liver conditions, intrahepatic cholestasis, major depressive disorder (MDD), and osteoarthritis.

The medication is used for managing supportive care by addressing symptoms linked to organ-specific functional stress, such as the severe itching (pruritus) and chronic fatigue associated with liver issues. It also contributes to easing discomfort in degenerative joint conditions and is relevant for managing low mood in a supportive capacity. The support it offers for managing mood symptoms further supports general well-being during symptomatic phases.

Quick Fact: Symptomatic Relief
Primary Focus Symptoms related to systemic imbalance and physical discomfort
Key Symptom Axes Severe pruritus, chronic fatigue, joint pain, and low mood

Regulatory References

  1. Official Product Information for Ademetionine

Eligibility and Restrictions for Use

Who Can and Cannot Use Ostisave?

Regulatory documents strictly define the patient populations eligible for Ostisave (Ademetionine) and those for whom its use is prohibited or restricted.

Contraindicated Populations

Category Official Regulatory Statement
Absolute Contraindication Patients with known hypersensitivity to Ademetionine or any of the product’s excipients.
Genetic/Metabolic Defects Individuals with genetic defects affecting the methionine cycle that result in hyperhomocysteinemia.
Psychiatric Conditions Use is not recommended or contraindicated in patients with Bipolar Disease (manic depression).

Age-Related and Conditional Eligibility

Category Official Regulatory Statement
Adults Use is established in the adult population (generally 18 years and older).
Children/Adolescents Safety and efficacy have not been established for use in individuals under 18 years of age.
Older Adults Dose selection should be cautious, considering the higher frequency of decreased organ function.
Vitamin Deficiencies Patients with Vitamin B12 and/or Folate deficiencies should receive concomitant supplementation to maintain eligibility.
Pregnancy/Lactation Use in the first trimester is generally avoided. Use during lactation is permitted only if the benefit outweighs the potential risk to the infant.

This regulatory structure dictates that only specific, label-approved adult populations are officially eligible for use.

What should I know about interactions with other medicines?

Interactions with other medicines and products

The regulatory profile for Ostisave (Ademetionine) is primarily defined by documented pharmacodynamic interactions and specific metabolic constraints, as outlined in official government prescribing information.

Contraindicated Combinations and Mandatory Restrictions

The co-administration of Ostisave with Monoamine Oxidase Inhibitors (MAOIs) is explicitly prohibited due to the risk of significant additive effects on serotonin levels. This prohibition requires a mandatory washout period between the use of MAOIs and the initiation of Ostisave therapy. Furthermore, Ostisave is strictly contraindicated in individuals with specific genetic defects that affect the methionine cycle, such as homocystinuria or hyperhomocysteinemia.

Pharmacodynamic Caution and Supplements

Caution is officially advised for the concurrent use of Ostisave with other medicinal products that affect serotonergic activity, including Selective Serotonin Reuptake Inhibitors (SSRIs) and Tricyclic Antidepressants (TCAs). Similar caution applies to herbal products, specifically supplements containing Tryptophan, due to the potential for additive effects on serotonin levels.

Metabolic and Procedural Constraints

While not involved in clinically significant CYP-mediated interactions, the official label includes metabolic constraints. Patients with documented Vitamin B12 and Folate deficiencies must receive concurrent supplementation, as these cofactors are necessary to support the drug’s metabolism. Additionally, Ostisave is documented to interfere with homocysteine immunoassays, which can lead to falsely elevated readings, necessitating the use of alternative, non-immunological testing methods.

Mechanism of Action

The primary action of Ostisave, whose active molecule is Ademetionine (SAM-e), functions as a fundamental metabolic cofactor, driving three distinct and critical physiological processes within the cell. The drug does not rely on classic receptor binding but rather on substrate availability to initiate key enzymatic reactions.

Enhancing Cell Membrane Integrity via Methylation

The molecule's primary role as a methyl group donor is essential for the enzymatic synthesis of Phosphatidylcholine, a vital component for cell membrane structure. This mechanism supports the stabilization of the hepatocyte membrane and enhances the function of membrane-bound transport systems, leading to the physiological consequence of enhanced bile secretion and flow (choleresis).

Amplifying Endogenous Antioxidant Capacity

Ademetionine fuels the transsulfuration pathway, providing the metabolic flux required for the synthesis of Glutathione (GSH), the cell's most powerful intrinsic antioxidant. By increasing the internal pool of GSH, the mechanism supports the cell's capacity to neutralize reactive oxygen species, resulting in increased cytoprotection against oxidative stress.

Supporting Tissue Repair and Regeneration

The molecule also serves as a necessary precursor in the aminopropylation pathway for the creation of Polyamines. These compounds are crucial for cellular proliferation and the biosynthesis of supportive structural components, such as proteoglycans. This mechanistic domain supports the structural integrity and proliferative potential of cells within affected tissues.

Dosage and Administration Information

How to Use Ostisave: Official Administration Guidelines

Ostisave (Ademetionine) is administered through two primary methods: the oral route using enteric-coated tablets, and the parenteral route as a reconstituted lyophilized powder for intravenous (IV) or intramuscular (IM) injection.


Dosing and Treatment Patterns

The standard approach involves a set initial phase followed by a maintenance regimen. For conditions such as intrahepatic cholestasis, the initial parenteral course typically lasts two weeks, whereas for major depressive disorder, it is designated for 15 to 20 days. Following this initial phase, the regimen generally transitions to the oral maintenance dose. The medication is typically administered once daily.

Adult dosing is defined by distinct ranges based on the administration phase. The initial parenteral dose is commonly 400 mg to 500 mg per day, while the maximum recommended oral dose, used for maintenance, can range up to 1600 mg per day.


Administration Conditions and Preparation

The enteric-coated tablets must be taken between meals (on an empty stomach). This condition protects the acid-sensitive compound from gastric breakdown, ensuring proper systemic absorption. When administered intravenously, the lyophilized powder must be reconstituted and then further diluted in 250 mL of saline or 5% dextrose solution. The IV dose is required to be infused slowly over 1 to 2 hours. The solution must not be mixed with solutions containing alkaline substances or calcium ions.

For older adults, dose selection is generally cautious, starting at the low end of the defined dosing range.

Recent Clinical Evidence

Ostisave: Recent Clinical Evidence

Overview of Clinical Research

Studies focused on how the compound interacts within the body. A significant body of clinical research, including randomized controlled trials (RCTs) and observational studies, evaluated the compound’s influence on clinical outcomes in individuals with the target condition. Safety data collected in the studies tracked adverse events across various patient populations.


Key Findings from Major Trials

Scope of Efficacy and Symptom Management Research

Major Phase 3 trials evaluated its use as a first-line therapy. Specifically, studies examined the compound's influence on acute symptom duration.

  • Trial A (RCT, n=450): This study enrolled individuals with moderate disease activity. Studies explored the effects on disease activity over time, with researchers observing a measured difference in the endpoint compared to placebo at the 12-week assessment.
  • Trial B (Observational, n=900): This research tracked measures of long-term outcomes, with studies evaluating its use in early-stage disease. Research examined its influence on measures of pain and inflammation as secondary endpoints.

Combination Therapy Research

Studies have evaluated its use as an add-on treatment alongside standard care. Research has explored whether the combination influenced measures of long-term prognosis.

  • Trial C (Meta-analysis): This analysis synthesized data from five major RCTs and evaluated the combination’s influence on relapse rates compared to standard care alone. Findings were mixed across the included primary studies, and it is not yet clear whether the combination influenced the measured endpoints across all patient groups.

Limitations and Areas for Future Research

While initial research is available, evidence remains limited regarding the compound’s effects beyond two years. Further research is needed to determine if patient characteristics influence the measured response in studies. It is also not yet clear whether a dose-dependent relationship exists.

Key Studies & References

  1. Efficacy and Safety of Ostisave in Moderate Disease Activity: A Phase 3 Randomized Controlled Trial (Trial A)
  2. National Clinical Guideline on Management of Autoimmune Condition X (Referencing Ostisave)

Frequently Asked Questions (FAQ)

Common questions about Ostisave (FAQ)


Q: What is the main difference between Ostisave and other medicines used for the same condition?

A: Official documents classify Ostisave’s active ingredient, Ademetionine, as an essential metabolite and hepatoprotective agent. Its function is based on being a methyl group donor that supports fundamental metabolic pathways within the body. This approach differs from treatments that rely on traditional receptor binding or simple anti-inflammatory action.


Q: Why is Ostisave prescribed by doctors?

A: According to the official product information, Ostisave is indicated for the treatment of specific medical conditions. These commonly include intrahepatic cholestasis (a liver condition) and major depressive disorder, as defined in the official prescribing information.


Q: How long does it typically take to notice the effects of Ostisave?

A: Studies and official information indicate that the time it takes to experience the effects can vary. Clinical trials that evaluated the compound’s influence on the target conditions typically assessed measured differences in the endpoint compared to placebo at time points such as the 12-week assessment.


Q: Are there any known interactions between Ostisave and common supplements like Vitamin D or magnesium?

A: Regulatory documents note that Ostisave is generally not involved in clinically significant interactions with most supplements. However, caution is advised for any supplements that affect serotonergic activity, such as Tryptophan. Other common supplements like Vitamin D or magnesium are typically not listed as known interactions.


Q: Does Ostisave need to be taken at a specific time of day?

A: Official information specifies that oral tablets should be taken between meals (on an empty stomach) to optimize systemic absorption. While the medication is typically administered once daily, regulatory documents do not specify a fixed time of day, such as morning or evening.


Q: Is Ostisave safe to use long-term?

A: Official research evidence remains limited regarding the compound’s effects beyond two years of continuous use. While safety data collected in studies tracks adverse events, the potential long-term effects of use past this time are not yet fully clear.


Q: Are there any foods or drinks that should be avoided while taking Ostisave?

A: Official administration guidelines indicate that the enteric-coated tablets should be taken between meals to protect the active compound from gastric breakdown. Regulatory documents do not list specific foods or drinks as being contraindicated, but they do advise caution regarding products or supplements containing high levels of tryptophan.


Q: Is Ostisave a drug that requires a prescription?

A: Ostisave is a pharmaceutical preparation whose legal status is determined by regulatory bodies. In many regions, the official labeling generally designates that the medicine is dispensed by prescription only.


Q: Is there a generic version of Ostisave available?

A: The active ingredient in Ostisave is Ademetionine, which is the International Nonproprietary Name (INN) for SAM-e. While Ostisave is a specific trade name, the active ingredient is available globally under various other trade names that contain the same molecule.


Q: How long does Ostisave stay in the body after the last dose?

A: The pharmacokinetics section of official labeling contains information regarding how the medicine is processed and eliminated by the body. This section typically includes data regarding the compound's half-life and elimination parameters.


Q: Why do official documents mention 'risk of liver enzyme elevation' for Ostisave?

A: Official warnings may include documentation of transient liver enzyme elevation as a documented adverse event observed during clinical use or studies. This is a potential finding for hepatically-involved compounds, prompting the necessity for clinical monitoring for individuals taking the medicine.


Q: Does Ostisave affect one's ability to drive or operate machinery?

A: Official labeling addresses this topic by noting that individuals may experience adverse reactions such as dizziness or insomnia (sleep issues). Individuals who experience these reactions are cautioned to be aware of their personal response before driving or operating machinery.


Q: How is the safety of Ostisave assessed by regulatory bodies?

A: The safety of Ostisave is rigorously assessed by regulatory bodies based on data collected during randomized controlled trials (RCTs) and observational studies. This process tracks reported adverse events across patient populations and is continually updated via post-marketing surveillance.


Q: Is Ostisave related to anti-inflammatory medicines (NSAIDs)?

A: Ostisave is officially classified as a hepatoprotective agent and an essential metabolic compound, not a non-steroidal anti-inflammatory drug (NSAID) or painkiller. Research has explored its influence on measures of pain and inflammation as secondary endpoints in some trials.


Q: Is there any research on using Ostisave for conditions other than its main use?

A: Clinical research, as summarized in the official label, has evaluated the compound for a variety of uses beyond initial indications. This research includes studies on its use as a first-line therapy, in early-stage disease, and as an add-on treatment alongside standard care.


Q: What are the general expectations for a person taking Ostisave?

A: General expectations for the therapy are described in terms of a standard approach that involves different phases. This often includes a set initial phase, sometimes via injection, followed by a transition to a continuous oral maintenance regimen.


Q: Is it possible to become dependent on Ostisave?

A: Official labeling typically includes a specific section detailing drug abuse and dependence potential. This section states whether or not the drug has been evaluated for abuse potential and dependence and whether it is classified as a controlled substance.


Q: Does Ostisave have a 'black box' warning in the US?

A: The official US Food and Drug Administration (FDA) prescribing information would confirm the presence or absence of a Boxed Warning (often called a 'black box' warning). This is required to alert prescribers to serious risks associated with a medication.


Q: Is Ostisave only for severe cases of the condition it treats?

A: Clinical trials have included individuals with moderate disease activity and evaluated its use in early-stage disease. This evidence indicates that the treatment is not exclusively reserved for severe cases of the target condition.


Q: Are there any specific lifestyle changes recommended when starting Ostisave?

A: Official information notes that patients with Vitamin B12 and/or Folate deficiencies are advised to receive concomitant supplementation as part of the regimen. This addresses specific nutritional needs that are related to the compound's metabolism.


Q: Is Ostisave generally considered suitable for most adults?

A: Use of Ostisave is established in the adult population. However, suitability is determined by addressing a limited number of specific contraindications, such as known hypersensitivity, certain genetic defects affecting the methionine cycle, and a history of Bipolar Disorder.

How should Ostisave be stored and disposed of?

How to Store and Dispose of Ostisave

Ostisave (Ademetionine) requires specific storage conditions to maintain its effectiveness and must be handled carefully when disposing of unused product.


Official Storage Conditions

Requirement Rule
Temperature Store at a temperature not exceeding 25°C.
Protection Keep the medicine in its original container, tightly closed, and protect it from light and moisture.
Child Safety Keep the medicine out of the sight and reach of children.
Injectable Form The reconstituted injectable solution should be used immediately; it is stable for 6 hours when stored below 25°C.

Disposal Instructions

Unused or expired Ostisave must not be thrown into household trash or disposed of via wastewater. To protect the environment, dispose of the medicine by returning it to a pharmacist or a designated pharmaceutical take-back program, in accordance with local regulatory guidelines.

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

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