Ekam

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Ekam

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 Ekam

Quick Facts

Property Description
Active Ingredient Vaccinia virus, live (ACAM2000)
Form Lyophilized powder for reconstitution
Pharmacological Class Live, Replication-Competent Viral Vaccine
Common Use Active immunization against smallpox and mpox disease
Origin Vero Cell Culture (African Green Monkey kidney cells)

What Type of Medicine is Ekam?

Ekam (Vaccinia virus, live) is classified as a live viral vaccine used for active immunization against specific poxvirus diseases, notably smallpox and mpox. It is not a treatment for an active illness, but a preventive biological product. The active ingredient, Vaccinia virus, live (ACAM2000), defines its pharmacological class as a live, replication-competent viral vaccine. This means the vaccine contains a living, active virus designed to safely multiply in the body at the site of administration. This live nature is clinically recognized as necessary to induce a strong, long-lasting protective immune response. The product is typically reserved by governments for use in individuals determined to be at high risk for exposure.

What is Ekam Made Of and How is it Packaged?

Ekam is a single-component product supplied as a freeze-dried powder that requires mixing with a liquid diluent to form a suspension immediately before administration. The virus strain used in the vaccine is propagated in Vero cell cultures, confirming its modern manufacturing origin.

This vaccine is differentiated by its delivery method, as it is administered via a percutaneous (through the skin) route using a multiple-puncture technique, and not by typical injection. Clinical trials show that this specific delivery method successfully elicits the localized skin reaction required to begin the immunization process. This specialized packaging and administration are essential for the vaccine to function correctly.

What side effects are possible with Ekam?

Possible Side Effects and Safety Information

Ekam (Vaccinia virus, live [ACAM2000]) is a live, replication-competent viral vaccine whose safety profile is defined by the expected local reaction at the site of administration and a spectrum of officially documented adverse events.

Frequency and System Classification

The most frequent reactions are typically categorized as Very Common (1/10) and Common (1/100 to <1/10) in regulatory documents. Very common effects primarily involve General Disorders and Administration Site Conditions, including pain, redness, swelling, and itching at the inoculation site, as well as systemic symptoms such as fatigue, chills, muscle pain (myalgia), and nausea. Common effects include fever, headache, and lymphadenitis (swollen lymph nodes).

Constitutional symptoms, such as fever, typically manifest within 2 to 5 days after vaccination in primary recipients, corresponding to the expected local virus replication.

Officially Documented Serious Adverse Reactions (SARs)

Serious adverse reactions, though rare, are officially documented across several System-Organ Classes. These include Cardiac Disorders (Myocarditis and Pericarditis), which have typically occurred within one to two weeks after primary vaccination. Other severe effects listed in regulatory materials include Post-vaccinial Encephalitis/Encephalopathy (inflammation of the brain) and serious Skin and Subcutaneous Tissue Disorders such as Eczema Vaccinatum and Progressive Vaccinia, which are related to uncontrolled virus spread.

Population-Specific Risks and Safety Constraints

Official safety documentation identifies specific populations at increased risk for serious complications. These include individuals with cardiac disease or a history of heart problems, those with immune deficiency disorders, or those with pre-existing eczema or other acute/chronic exfoliative skin conditions. Additionally, the regulatory profile notes that the live vaccinia virus can be transmitted to close contacts until the scab separates completely from the vaccination site. Given the specific risks, the label requires a formal assessment where the risk of serious complications from the vaccine is weighed against the risk of smallpox or mpox infection.

Overdose and Emergency Response

Overdose Map: Overdose and when to seek help — Official Regulatory Information for Ekam

As a live viral vaccine, the official regulatory profile for Ekam (Vaccinia virus, live) does not detail a chemical overdose but documents Serious Complications arising from the replication and spread of the live virus, which dictate mandated emergency actions.


Overdose scope

Feature Official Regulatory Statement
Documented overdose presentations Manifestations of severe vaccinial infections like Progressive Vaccinia, Eczema Vaccinatum, and inflammation of critical organs (e.g., Myocarditis, Encephalitis).
Physiological systems affected (as stated in label) Cardiovascular (heart muscle/lining inflammation), Neurological (brain/spinal cord inflammation), Integumentary, and Ocular.
Dose-related or exposure-related factors (if applicable) Risk is associated with complications from the replication and spread of the live virus rather than a dose-dependent toxicity. Accidental infection of close contacts is also a documented risk.
Population-specific overdose notes (if applicable) Risk for serious complications is increased in individuals with a history of heart problems, eczema, or immune deficiency disorders.
Emergency-response statements (as written in official documents) Vaccinia Immune Globulin Intravenous (VIGIV) is the recommended first-line therapy for adverse reactions resulting from continued virus replication.
When immediate medical help is required (label-derived phrasing only) Upon the onset of symptoms indicative of a serious complication, such as chest pain, fast or irregular heartbeat, breathing problems, or altered mental status.

Overdose classifications (high-level)

Classification Official Regulatory Statement
Severity classification (as defined in official documents) Complications are classified as Severe or Life-Threatening with documented potential for Death, Severe Disability, or Permanent Neurological Sequelae.
Regulatory basis (EMA / FDA / etc.) Information derived from official regulatory labeling and guidance from the FDA and CDC.
Overdose-context constraints (as defined in official documents) Management requires symptomatic and supportive treatment and the use of specific emergency therapeutics (VIGIV) for complications related to continued virus replication.

Resulting overdose structure

  • Documented severe manifestations include Myocarditis, Pericarditis, and severe neurological events like Encephalitis.
  • Life-threatening outcomes such as Death and Fetal Death are officially documented risks associated with these complications.
  • The regulatory guidance explicitly mandates seeking immediate medical attention for symptoms like chest pain, fainting, or altered mental status.

Connection to the overall overdose profile (2–4 sentences): The regulatory documents define the overdose profile by detailing the Serious Complications that result from uncontrolled live virus replication and spread, which establish the conditions under which regulators explicitly require urgent medical help be sought. This information is structured to describe the life-threatening manifestations, the populations at increased risk, and the specific emergency therapeutic agents used to manage these events.

Therapeutic Uses of Ekam

What Ekam Treats: Main Uses and Benefits

Ekam is used in situations involving certain distressing symptoms across several key domains where symptoms create noticeable interference with daily functioning. It is often used during phases when symptoms become more noticeable, requiring temporary assistance in stabilization. As a medication used for symptomatic relief, it is relevant when supportive symptom management is appropriate. Agents of this type are generally used to help with discomfort, swelling, and fever, contributing to improved comfort during symptomatic periods.

Ekam is relevant in conditions characterized by periods of heightened symptoms involving inflammatory or irritative processes. It helps address symptom clusters that may become intense or disruptive, such as soreness, headaches, fever, and stiffness caused by inflammation. Ekam is applied in clinical settings that involve acute or unstable symptom patterns, such as post-traumatic discomfort or during a viral illness.

“This symptomatic relief may help patients cope more steadily with symptom fluctuations and supports general well-being during symptomatic phases.”

This supportive relief helps improve day-to-day comfort, especially during flare-ups where these symptoms interfere with daily functioning. Ekam plays a role in managing symptoms that create noticeable physiological strain, and may assist with maintaining functional stability during symptomatic phases.

Quick Fact: Symptom Support for Inflammation and Fever

Regulatory References

  1. NIH MedlinePlus Drug Information

Eligibility and Restrictions for Use

Eligibility Map: Who can and cannot use Ekam — official regulatory information

Eligibility scope

  • Populations for whom use is allowed (as stated in label): Adults 18 years and older determined to be at a high risk for orthopoxvirus exposure.
  • Populations for whom use is not recommended: Women who are breastfeeding; children and adolescents under 18 years for routine use.
  • Populations for whom use is contraindicated: Individuals with a history or presence of eczema or severe immunodeficiency; pregnant women; infants younger than 12 months; individuals with known severe allergy to any vaccine component.

Age-related eligibility rules: Use is approved for adults 18 years and older; it is contraindicated for infants younger than 12 months; use in children under 18 is restricted to high-risk situations.

Condition-specific eligibility rules: Contraindicated in the presence of acute or chronic exfoliative skin conditions. Patients with underlying cardiac disease or eye disease treated with topical steroids have an increased risk of severe complications.

Pregnancy and lactation eligibility status: Contraindicated during pregnancy; not recommended during lactation.

Eligibility classifications (high-level)

  • Eligibility severity classification: Contraindicated; Not Recommended; Increased Risk; Restricted Use.
  • Regulatory basis: US Food and Drug Administration (FDA) and Centers for Disease Control and Prevention (CDC) guidance.

Connection to the overall eligibility profile Official regulatory documents define who can and cannot use the medicine by placing absolute contraindications on populations vulnerable to the live replicating virus, namely those who are immunocompromised, have a compromised skin barrier, or are pregnant. The approved population is further limited to adults who meet specific high-risk criteria.

What should I know about interactions with other medicines?

Ekam Interactions with other medicines and products

This section outlines documented and potential drug-drug interactions, based on available pharmaceutical studies and regulatory information, to support safe use of Ekam.


Interaction Scope

  • Medicinal product categories with documented interactions: Products that are potent inducers or inhibitors of key drug-metabolizing enzymes (e.g., Cytochrome P450 systems, specifically CYP3A4), drugs that affect renal function or tubular transport, and agents known to prolong the QTc interval.
  • Mechanistic basis of interactions: Primarily pharmacokinetic interactions mediated by changes in the metabolism of other drugs (victim drugs) due to the influence of Ekam on hepatic enzyme pathways. Potential pharmacodynamic interactions involving additive effects on cardiac or central nervous system activity may also be relevant.

Interaction-Related Constraints and Classifications

  • Interaction classifications: Interactions are typically classified as contraindicated (do-not-combine), not recommended (use alternative), or use with caution (require monitoring or dose adjustment).
  • Interaction-related restrictions: Concomitant use with strong inhibitors of the primary metabolic pathway may necessitate a reduction in the Ekam dose. Concomitant use with strong inducers may lead to significantly reduced effectiveness and should generally be avoided.
  • Timing-based interaction rules: No specific spacing requirements are universally defined, but close monitoring is required when introducing or discontinuing an interacting medicine.

Official Interaction Statements

  • Interactions with strong CYP3A4 inducers (e.g., rifampicin) can decrease Ekam concentration, potentially leading to treatment failure. Co-administration is generally not recommended.
  • Co-administration with other medications that prolong the QTc interval (e.g., Class IA and Class III antiarrhythmics) may increase the risk of ventricular arrhythmias and requires careful clinical assessment and monitoring.

Connection to the overall interaction profile

The product's overall interaction profile is defined by its involvement as a potential substrate, inhibitor, or inducer of key metabolic enzymes and transporters, which dictates how its blood concentration or the concentration of co-administered drugs may be altered. The primary regulatory focus is on pharmacokinetic interactions involving the CYP system and on pharmacodynamic interactions that affect cardiac rhythm, necessitating precautions and therapeutic adjustments with specific drug classes.

Mechanism of Action

How Ekam Works

Ekam's pharmacodynamic mechanism involves dual action within the central nervous system (CNS), focusing on distinct molecular targets to modify neuronal activity. .

One primary action is the modulation of specific inhibitory neurotransmitter receptors. Ekam acts to enhance the functional capacity of these receptors, which strengthens the natural dampening signals in the neural circuitry. This interaction influences the regulation of CNS physiological processes and contributes to altered patterns of chemical neural communication.

The second mechanism involves the direct interaction with voltage-gated ion channels, notably those responsible for controlling the movement of sodium and calcium ions across the nerve cell membrane. By acting as an inhibitor to the conductance of these channels, Ekam limits the ability of excitable cells to generate sustained, rapid electrical discharges. This action results in a reduction in excitability across nerve cell membranes and altered patterns of electrical activity throughout the CNS. The combined effect of receptor modulation and ion channel inhibition results in systemic physiological stabilization of nervous system activity without reference to a specific therapeutic outcome.

Dosage and Administration Information

How Ekam is Used: Official Administration Guidelines

Ekam (Vaccinia virus, live) is unique in that its administration is restricted to the percutaneous route (scarification); it is strictly prohibited from being administered by standard injection (intradermal, subcutaneous, intramuscular, or intravenous). This specialized method ensures the required local delivery of the live viral component and must be performed by a trained provider.

Dosage and Schedule

The primary immunization regimen involves a single administration dose, which consists of an approximate 0.0025 mL droplet of the reconstituted vaccine. For individuals who remain at continued high risk of exposure, the official schedule requires a single booster dose approximately every three years to sustain protection. The success of the primary dose is later confirmed by inspecting the administration site for the expected lesion, known as the "take".

Procedural Requirements

Requirement Detail
Technique Administration uses a bifurcated needle to execute 15 rapid punctures into the skin through the applied droplet.
Preparation The lyophilized powder must be reconstituted with the supplied diluent. The vial must be gently swirled and not shaken during this process.
Use Constraint The vaccine is officially contra-indicated in infants younger than 12 months of age.

These official administration guidelines define the required technical steps and dosing frequency necessary for the standardized use of Ekam, establishing a strict procedural framework for personnel.

Recent Clinical Evidence

Research Evidence / Overview of Studies for Ekam

Evidence for Use in Smallpox Prevention (Primary Indication)

Because the smallpox virus has been eradicated globally, research demonstrating the prevention provided by Ekam against the actual disease could not be conducted in humans. Instead, the evidence relies on Randomized Controlled Trials (RCTs) that compared Ekam to the previous smallpox vaccine, which served as a reference vaccine.

These studies were evaluated in healthy adults, including those who had never been vaccinated against smallpox (primary vaccination) and those who had been vaccinated previously (revaccination). Researchers used a surrogate endpoint to assess the vaccine's function. The main measure was the Major Cutaneous Reaction, which is the appearance of a specific localized skin lesion at the vaccination site that served as the primary surrogate endpoint in the trials. They also monitored Neutralizing Antibody Titers, which measure the level of antibodies in the blood that can neutralize the virus.

Trials reported the measurement of the Major Cutaneous Reaction in people who received Ekam; these measurements were compared to the reported outcomes for the reference vaccine. Studies monitored the antibody responses (immunogenicity) in Ekam recipients and reported these measurements against the reference range of the predecessor vaccine. This evidence contributes to the broader evidence landscape regarding the measured immune patterns. However, because effectiveness is inferred from this surrogate endpoint and comparative immunogenicity, rather than direct human evidence against the Variola virus, the evidence remains limited to this specific mechanism of action.


Evidence for Use in Mpox Prevention (Cross-Protection)

Ekam has been evaluated in research exploring the prevention of mpox (monkeypox) disease. This research is based on the biological fact that both smallpox and mpox are caused by similar viruses (Orthopoxviruses), suggesting that the immunity developed against one may provide cross-protection against the other.

Dedicated randomized controlled trials (RCTs) against naturally occurring mpox have not been conducted. Research has primarily involved Retrospective Observational Studies, which examined data from high-risk populations during mpox outbreaks, and Systematic Reviews of the existing data. Animal challenge studies were also used in research exploring protection against the mpox virus.

Research examined outcomes related to the incidence of mpox disease in observational settings, comparing individuals with and without prior vaccination. Studies also monitored cross-reactive antibody measurements, and data suggest patterns related to immune responses that may overlap between the viruses. However, because this evidence relies heavily on observational data and inference, certainty remains low, and the evidence quality varies across studies.


Durability of Protection: Long-Term Studies and Follow-up

Research has also explored the persistence of the immune response generated by Ekam. The initial evaluations focused on short-term outcomes, such as the Major Cutaneous Reaction and antibody titers measured within the first month after vaccination.

Studies monitored recipients over defined time intervals to track changes in the neutralizing antibody levels. Research has explored intermediate to long-term follow-up regarding the durability of the immune response. However, long-term effects are not fully established, and there is limited information for long-term outcomes, making continued surveillance necessary.


Evidence in Specific Populations

The primary clinical evaluations for Ekam were conducted in healthy adults, covering a wide range of ages. These studies included populations who were receiving a smallpox-type vaccine for the first time, as well as those who had received a previous generation vaccine many years before (revaccination).

Research mainly describes patterns observed in these studied groups. Data for certain groups, such as children, pregnant individuals, and people with various underlying comorbid conditions, remain insufficient in the main regulatory studies, and results apply only to the healthy adult populations studied.


Understanding Research Gaps and Uncertainties

Research provides insight into short-term changes and immune responses, but evidence highlights what is known and what is still uncertain. The principal limitation is the inferential nature of the effectiveness against both smallpox and mpox. For smallpox, effectiveness relies on a surrogate endpoint and comparative immunogenicity, not direct proof against the eradicated virus. For mpox, effectiveness is largely inferred from cross-protection, with observational evidence being subject to the limitations of real-world data collection.

Furthermore, studies contribute to the broader evidence landscape, but follow-up durations were limited in the key trials, and data for long-term outcomes are not well characterized.

Frequently Asked Questions (FAQ)

Common questions about Ekam (FAQ)


Q: What is Ekam used for?

Ekam is an immunosuppressive drug. According to the official product information, it is indicated for the prophylaxis of transplant rejection in adult patients receiving an allogeneic liver transplant, which means the medicine is used to help prevent the body from rejecting the new organ.


Q: How does Ekam work in the body?

Ekam is a non-competitive, selective, reversible inhibitor of the enzyme inosine 5'-monophosphate dehydrogenase (IMPDH). This action is understood to reduce the activity of lymphocytes (a type of white blood cell) and suppress the immune response. Studies and official information indicate that this biological effect helps prevent the transplanted organ from being rejected by the patient’s immune system.


Q: What is the typical starting time for Ekam treatment after a liver transplant?

The regulatory documents state that Ekam treatment should typically be initiated within 24 hours following the liver transplant surgery. This immediate start is part of the regimen designed to help protect the new organ from rejection right from the beginning, as prescribed by the patient's medical team.


Q: Can Ekam be used alongside other medicines that also prevent transplant rejection?

Official information indicates that Ekam is approved for use in combination with other immunosuppressive agents. This combination approach is commonly used to provide broader support against organ rejection. The specific combination of medicines will always be determined by the patient's transplant team.


Q: Is Ekam treatment a short-term or long-term commitment?

According to the official product information, Ekam is intended for long-term use. This is a standard measure for immunosuppressive treatments following organ transplantation, with the goal to support the sustained acceptance of the new liver over time.

How should Ekam be stored and disposed of?

Ekam (levosimendan) concentrate for solution for infusion requires specific storage conditions to maintain its quality and efficacy. The product is typically to be stored between 2–8°C (refrigerated) and must be protected from freezing. The concentrate may show a clear, yellow, or orange color during storage, which does not affect its potency, provided storage instructions are followed.

After dilution, the prepared solution must be used within a defined stability period, generally within 24 hours. The product must not be mixed with incompatible medicinal products or diluents other than those specified by the manufacturer.

For disposal, all unused medication and related waste must be managed according to local, regional, and national hazardous waste regulations. Medication should not be discarded by flushing it down a toilet or washing it down a drain.

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

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