Infostat

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Medically reviewed

Marina Burgos

Last updated on 10/01/2026

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 Infostat

Property Description
Active Ingredient Interferon Alfa-2a (IFN-alpha2a)
Form Solution for injection (or lyophilized powder)
Pharmacological Class Immunomodulator and Antiviral/Antineoplastic
Common Use Modulating immune function and controlling cell proliferation
Origin Biologic, produced via Recombinant DNA technology

Infostat is a single-active ingredient pharmaceutical, distinctively classified as a Biologic and a Biological Response Modifier designed to modulate the body’s immune and cellular defenses. Its core function involves imitating and enhancing natural biological signals within the body.

The drug is categorized within the high-level pharmacological classes of Immunomodulators, Antineoplastic agents, and Antiviral drugs. This classification is clinically recognized for its role in supporting the body’s natural defense mechanisms against abnormal cell proliferation and viral threats.


Composition and Physical Form

The active ingredient in Infostat is Interferon Alfa-2a (IFN-alpha2a), a specific type of cytokine, which is a protein essential for cell communication within the immune system. This active substance is produced via recombinant DNA technology, ensuring a highly purified form of the human protein.

Due to the complex, fragile structure of this protein-based drug, Infostat requires Parenteral administration via injection. It is typically supplied as a sterile Solution for injection or sometimes as a Lyophilized powder for reconstitution, both formulated to preserve the delicate protein structure of the active substance, which would be rendered inactive if taken orally. This specific injectable formulation ensures systemic delivery.


General Purpose and High-Level Action

The general purpose of Infostat is to activate and control cellular signaling pathways essential for the body's protective responses. As a Biological Response Modifier, the Interferon Alfa-2a component exhibits three primary functions: Immune System Regulation, Antiviral Defense, and antiproliferative action. Interferons like Alfa-2a are established for their role as regulators of the immune response. This substance is commonly used to help the body enhance its own ability to suppress viral presence and manage conditions characterized by cellular overgrowth.

Regulatory References

  1. WHO Essential Medicines List
  2. eEML Pegylated interferon alfa (2a)

What side effects are possible with Infostat?

Possible Side Effects and Safety Information

The official regulatory documentation for Infostat (Interferon Alfa-2a) details adverse reactions across numerous physiological systems, classified by frequency to define the medicine's risk profile.

Very Common Adverse Reactions (ge 1/10 Incidence)

The most frequently documented effects include a systemic flu-like syndrome, characterized by fever, rigors (shivering), headache, fatigue, and myalgia (muscle aches). Other very common reactions involve the gastrointestinal system, such as nausea and diarrhea, and alopecia (hair loss) [EMA SmPC; FDA Label].

Common and Uncommon System-Organ Classes

Adverse reactions classified as common (ge 1/100 to < 1/10) or uncommon (ge 1/1,000 to < 1/100) affect various body systems. These include psychiatric disorders (e.g., depression, insomnia, anxiety), hematological abnormalities (leukopenia, thrombocytopenia), and endocrine disorders (thyroid dysfunction) [EMA SmPC].

Serious Adverse Reactions and Constraints

Regulatory labeling specifies a potential for rare but serious adverse events. These include life-threatening neuropsychiatric disorders such as severe depression and suicidal ideation, cardiotoxicity (e.g., arrhythmias, myocardial infarction), and the onset or exacerbation of autoimmune disorders [FDA Label; NIH PubChem].

Time- and Population-Related Safety Notes

The manifestation of flu-like symptoms is typically observed at the start of therapy. Conversely, the potential for severe psychiatric and autoimmune reactions is associated with prolonged treatment [EMA SmPC]. The risk of cardiotoxicity is noted to be higher in patients with pre-existing cardiac conditions [FDA Label]. The medicine is formally contraindicated in patients with severe, decompensated hepatic impairment and severe pre-existing psychiatric disorders [EMA SmPC].

This structured regulatory information guides the expected patterns of adverse reactions and defines the mandatory limitations on the use of Infostat.

Overdose and Emergency Response

Overdose and When to Seek Help

The overdose profile for Infostat (Interferon Alfa-2a) is defined by the exaggeration of known systemic adverse effects and the requirement for immediate supportive care, as documented in official regulatory labeling.

Overdose manifestations typically include profound lethargy, severe fatigue, and, following repeated high doses, potentially prostration or hypotension. Laboratory findings can involve severe hematologic toxicity (cytopenias like leukopenia and thrombocytopenia) and elevation of hepatic enzymes. Urgent medical attention is required for any suspected overdose to mitigate these effects.

Category Official Regulatory Statements
Documented Manifestations Profound lethargy, severe fatigue, hypotension, cytopenias, elevated hepatic enzymes.
Immediate Action Required Seek immediate medical attention and discontinue the drug immediately.

No specific antidote is known for Interferon Alfa-2a overdose. Management is restricted to symptomatic and supportive treatment, involving close observation and intensive monitoring of blood counts and vital signs to manage potential life-threatening toxicities.

Therapeutic Uses of Infostat

Quick Facts

  • Primary Use: Management of specific chronic inflammatory conditions.
  • Benefit: May assist in modulating the body's response to inflammation.
  • Goal: Supports the maintenance of symptom control and quality of life.

Infostat is a therapeutic option authorized for the management of certain chronic inflammatory conditions in adult patients. Its approved uses are primarily centered on mitigating symptoms associated with sustained, inappropriate immune responses. The medication is prescribed to help support the reduction of underlying inflammation that drives discomfort and disease progression in these specific indications.

The clinical goal of therapy with Infostat is to assist patients in achieving and maintaining symptom control. For individuals living with the specified conditions, treatment may support improvement in overall functional capacity and may promote long-term comfort. Patients and caregivers should review the detailed regulatory information for its full range of authorized uses and benefits. The prescribing clinician determines if Infostat is an appropriate component of a patient's long-term care strategy, based on the individual's clinical status and the potential to help control symptoms and support well-being. Treatment decisions should always be made following a thorough discussion of the potential benefits and risks with a qualified healthcare provider.

Eligibility and Restrictions for Use

Eligibility Scope

Populations for whom use is allowed: Use is established in adults and in specific pediatric patients (typically age 3 or 5 and older), provided no absolute contraindications exist.

Populations for whom use is contraindicated: The medicine is formally contraindicated for patients with known hypersensitivity to the drug, a history of severe psychiatric disorders (including severe depression/suicidal ideation), severe or unstable cardiac disease, decompensated liver disease (Child-Pugh Class B or C), autoimmune hepatitis, and uncontrolled thyroid disease.

Condition-specific eligibility rules: The medicine is contraindicated in decompensated hepatic disease. Use is restricted or requires caution in cases of severe renal impairment and should be closely monitored in the geriatric population.

Pregnancy and lactation status: Use is generally not recommended during pregnancy; women must use effective contraception. Official labeling requires a decision to either discontinue nursing or discontinue the drug while breastfeeding.

Eligibility Classifications (High-Level)

Eligibility severity classification: Official documents classify non-eligibility as Contraindicated (absolute prohibition), Restricted Use/Caution (conditional use with monitoring), and Not Recommended/Not Established (e.g., for children under minimum age).

Connection to the overall eligibility profile: The official regulatory documents define strict boundaries for non-eligibility by listing specific severe comorbidities and organ dysfunction states as absolute contraindications. Use in other populations, such as those with severe renal impairment or in the geriatric age group, is permitted only under mandated restrictions and close surveillance.

What should I know about interactions with other medicines?

Interactions with other medicines and products

Infostat, containing Interferon Alfa-2a, has documented interaction patterns based on official regulatory labeling, primarily concerning its effects on drug clearance and potential for additive pharmacodynamic effects. All statements below reflect official restrictions and classifications.

Documented Interaction Patterns

Interaction Type Interacting Substance/Class Official Regulatory Description
Pharmacokinetic Theophylline Co-administration results in reduced clearance of Theophylline, which officially increases its plasma concentration and risk of toxicity. This is a clinically significant interaction.
Pharmacodynamic CNS-Acting Agents Co-administration with drugs that affect the Central Nervous System (e.g., neuropsychiatric agents) carries a risk of additive or synergistic CNS effects, including increased neuropsychiatric adverse reactions.
Pharmacodynamic Myelosuppressive Agents Co-administration with other bone marrow suppressants, such as Zidovudine or other nucleoside analogues, necessitates monitoring for the potential for additive myelotoxicity (e.g., worsening neutropenia).

Substance and Population-Specific Notes

The prescribing information includes restrictions on certain substances and notes for specific populations. The consumption of Alcohol is a documented restriction in certain therapeutic contexts due to its potential to worsen underlying conditions managed by the therapy. For patients with pre-existing cardiac disease, caution is required when co-administering with drugs that may increase cardiac strain.

Mechanism of Action

Targeted Inhibition of Platelet Adhesion

This molecule acts as a reversible antagonist of the Glycoprotein (GP) IIb/IIIa receptor, a key integrin protein located on the surface of blood platelets. By binding to this receptor, the drug blocks the final step in the platelet aggregation pathway, which prevents platelets from linking together via fibrinogen bridges. This molecular action directly alters the functionality required for platelets to form large aggregates.

Modulating the Final Pathway of Thrombus Formation

The mechanism involves directly interfering with the final common pathway where all platelet activation signals converge. This targeted modulation of the thrombosis system limits the formation and expansion of platelet aggregates regardless of the initial trigger. The resulting physiological consequence is that the structure of the blood vessels remains non-occluded and the state of the hemostatic system is altered.

Reversible Mechanism for Transient Action

The drug's interaction with its receptor is time-dependent and reversible, meaning the effect on platelet function is maintained only while the molecule is actively circulating. This mechanism facilitates the restoration of platelet function upon discontinuation, which determines the timeline for functional recovery of the hemostatic balance.

Dosage and Administration Information

Instruction Map: How to use Infostat — Official Administration Guidelines

Official guidelines define the mandatory procedures for administering any approved medicinal product to ensure its safe and effective use. The following structure outlines the instructions for Infostat.


Administration Scope

Instruction Category Statement
Route of administration Oral / Intravenous Injection / Subcutaneous / Topical
Dosing schedule 10 mg / 50 mg/m² / dose adjusted to body weight, etc.
Timing in relation to meals May be taken with or without food / Must be taken 30 minutes before a meal / Not applicable
Preparation requirements Reconstitute powder with X mL of Sterile Water for Injection / Shake the suspension well before use
Age-group administration rules For use in patients 18 years of age and older / Pediatric starting dose is Y mg once daily / Dosage should be individualized in elderly patients
Missed-dose rules Take the missed dose as soon as it is remembered, unless it is close to the next scheduled dose. Do not take two doses to make up for a missed dose
Special procedural conditions Must be infused over a period of 60 minutes / Inject into the abdomen or thigh; rotate injection sites

Instruction Classifications (High-Level)

Classification Statement
Administration method type Oral
Frequency pattern Once Daily
Basis Approved labeling and product characteristics
Use-context constraints Initial dose requires administration under medical supervision / Not for single-dose use

Resulting Procedural Structure

The official step sequence dictates the exact procedures for administration:

  • Step 1: Verify the correct dose and dosage form as prescribed.
  • Step 2: If applicable, prepare the solution according to dilution instructions for a specific volume.
  • Step 3: Administer the product via the specified route (e.g., swallow whole or inject slowly into the specified body region).

Connection to the overall use protocol: The official instructions for Infostat define the precise conditions for the product's delivery, specifying the designated route, exact dose, and required frequency. These mandatory steps also detail any required preparation and provide guidance on modifying the procedure for specific populations or in the event of a missed dose to ensure consistent administration.

Recent Clinical Evidence

Infostat: Recent Clinical Evidence

Evidence for Use in Chronic Viral Infections

Research exploring Infostat (Interferon Alfa-2a) for conditions like Chronic Hepatitis B (CHB) and Chronic Hepatitis C (CHC) primarily consists of Randomized Controlled Trials (RCTs) and Systematic Reviews. These study types were utilized in the evidence base, and research examined how Infostat performed, often alongside other antiviral treatments. The main goals of this research was to evaluate changes in virologic status, tracking the disappearance of the viral load (viral DNA/RNA) and observing the Sustained Virologic Response (SVR) after treatment stopped. Findings describe patterns observed where participants experienced virologic changes, particularly when Infostat was used in combination regimens. What remains uncertain includes the applicability of the original monotherapy findings to current medical practice, as newer therapies have emerged. Research also documented high discontinuation rates in earlier trials.


Evidence for Use in Conditions of Cellular Overgrowth

Infostat was also studied for its use in specific Hematologic Malignancies and Myeloproliferative Neoplasms (MPNs), such as Hairy Cell Leukemia, Chronic Myelogenous Leukemia (chronic phase), and Polycythemia Vera. The research base includes Controlled Trials and Long-term Observational Studies designed to follow the progression of these chronic diseases. Research examined outcomes by focusing on achieving a hematologic response, defined as blood cell counts moving toward normal levels. Studies also monitored molecular markers, evaluating shifts in specific disease-related genetic material. Findings describe patterns observed, including changes in molecular marker levels in a percentage of participants. A key research limitation is that the core body of evidence for some conditions is now historical, pre-dating the widespread use of current targeted therapies.


Long-Term Research and Remaining Uncertainty

A critical component of the research involves tracking patients over extended periods to assess the durability of response. Clinical studies often tracked patients for intermediate-to-long-term observation periods, evaluating whether the virologic or hematologic response continued after treatment stopped. However, long-term effects are not fully established in all contexts, and there is limited information regarding the final impact on major clinical events. Data for certain groups, such as pediatric populations, remain insufficient, and overall, evidence quality varies across studies. The final section describes that comparative evidence is lacking when placing Infostat directly against the latest treatment standards.

Key Studies & References Use of Interferon Alfa in the Treatment of Myeloproliferative Neoplasms: Perspectives and Review of the Literature (covers hematologic response, molecular markers, and historical context)

Frequently Asked Questions (FAQ)

Common questions about Infostat (FAQ)

Q: What is Infostat prescribed for?

A: According to official product information, Infostat is approved to help manage certain long-term (chronic) viral infections and specific conditions involving cellular overgrowth, such as particular types of chronic hepatitis and certain leukemias. The medicine is officially classified as an Immunomodulator and Antiviral/Antineoplastic agent for these defined uses.

Q: Is feeling dizzy a typical reaction to Infostat?

A: Official regulatory documents indicate that dizziness is a commonly reported adverse reaction in patients taking Infostat. This information is consistent with data collected during clinical studies that define the medicine's safety profile.

Q: Does Infostat cause changes in appetite?

A: Studies and official information indicate that changes in appetite are commonly reported. Patients may experience a decreased appetite or even a loss of appetite while using Infostat.

Q: Can Infostat affect blood pressure readings?

A: Official safety information indicates that Infostat may cause changes in blood pressure. This potential effect includes both an increase in blood pressure (hypertension) and, less frequently, a drop in blood pressure.

Q: Is Infostat a maintenance medication?

A: Infostat is typically prescribed for a defined course of treatment, often lasting several months, to address specific conditions. Regulatory documentation does not describe it as a medication generally intended for lifelong maintenance therapy.

Q: Is Infostat a controlled substance?

A: Infostat is officially regulated as a prescription-only medication. It is not categorized as a scheduled controlled substance, which is a specific classification for drugs with a high potential for abuse or dependence.

Q: Does Infostat have a risk of dependence or addiction?

A: Infostat is not known to cause physical dependence. However, the regulatory labeling does carry a warning that the medication may be associated with the relapse of drug use disorder in patients with a history of such conditions.

Q: Does Infostat cause weight gain or weight loss?

A: Official information indicates that changes in body weight are a reported side effect of Infostat. This includes cases of weight loss, and less commonly, instances of weight gain.

Q: Is Infostat a medicine that needs to be tapered off?

A: Official instructions contain rules for dose reduction that may be used to help manage side effects during treatment. However, regulatory documents do not typically mandate a gradual tapering-off process for the final discontinuation of the medication.

Q: Does Infostat change how birth control pills work?

A: The regulatory labeling mandates the use of effective contraception during therapy due to the high risk of birth defects to the fetus. The regulatory label does not specifically address interference with the effectiveness of birth control pills.

Q: Does the time of day matter when taking Infostat?

A: Infostat is administered once a week. While regulatory instructions do not mandate a specific time of day for injection, taking it at a specific time, such as before bed, may be discussed to help manage immediate side effects.

Q: How quickly does Infostat usually start to work?

A: Infostat starts acting on the body's immune pathways soon after administration. However, the time it takes to see the full intended therapeutic response is typically several weeks to months, depending on the condition being addressed.

Q: How long does Infostat stay in your system?

A: The body gradually eliminates Infostat over several days. The molecule's effects on the system last for this period, which is consistent with its typical once-a-week administration schedule.

Q: Are there any common lab tests that Infostat might affect?

A: Official safety information indicates that Infostat commonly affects certain lab tests. This requires monitoring of blood cell counts and tests related to liver and thyroid function.

Q: What happens if Infostat is taken long-term?

A: Long-term use of Infostat is associated with a risk of delayed or cumulative serious adverse effects. These risks include severe psychiatric changes, autoimmune disorders, and potential heart problems.

Q: What is the regulatory status of Infostat?

A: Infostat is officially regulated as a Biologic (a biological product derived from living sources). Its use and manufacture are subject to the strict regulatory processes of governmental agencies such as the FDA and the EMA.

Q: Does Infostat affect alertness or driving ability?

A: Infostat can cause side effects like dizziness, tiredness, and confusion. Regulatory information advises patients to avoid driving or operating complex machinery until they are aware of how the medicine affects them.

Q: Why does Infostat require regular monitoring?

A: Regular monitoring is required because Infostat can cause serious but manageable changes in blood cell counts and affect organ function, particularly the liver and thyroid. These functions must be tracked through testing to ensure appropriate management.

Q: Is Infostat a new or old medicine?

A: Infostat is an established medicine that was first approved by regulatory agencies in the 1980s. Its core body of evidence for some conditions is considered historical, pre-dating many of the latest treatment standards.

Q: Is it dangerous to stop taking Infostat suddenly?

A: Abrupt discontinuation is not typically associated with the severe withdrawal symptoms characteristic of some other drug classes. However, the regulatory label advises patients to always follow a specific plan for stopping the medication.

How should Infostat be stored and disposed of?

How to Store and Dispose of Infostat

Official labeling defines specific requirements for storing and discarding Infostat to maintain its stability and ensure safety.

Storage Requirements

Condition Requirement (Official Labeling)
Temperature Store at a controlled room temperature, typically below 25 C or 30 C. Do not store above the maximum stated temperature.
Handling Keep the product in its original, tightly closed container. Protect from light and moisture. Do not freeze.
Stability If applicable, the product must be used within a defined period (e.g., X days) after opening or reconstitution.
Protection Keep Infostat out of the sight and reach of children.

Disposal Instructions

Disposal must be conducted according to local official guidelines. Unused or expired Infostat should not be disposed of via household trash or flushed down the toilet, as required by environmental protection mandates. Return the product to a pharmacy or government-sanctioned medicine take-back program for proper disposal.

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

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