Lenalidomide

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Lenalidomide

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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 Lenalidomide

What is Lenalidomide? Overview

Property Description
Active ingredient Lenalidomide
Form Capsules (Oral dosage form)
Pharmacological class Immunomodulatory Drug (IMiD), Antineoplastic Agent
General purpose Management of hematological malignancies
Origin Synthetic thalidomide analog

Lenalidomide: A Synthetic Immunomodulatory Drug (IMiD)

Lenalidomide is a potent, synthetic compound classified as both an Antineoplastic Agent and an Immunomodulatory Drug (IMiD). The medicine is a prescription-only substance whose sole active ingredient is Lenalidomide. Structurally, it is derived from the older drug thalidomide, making it a thalidomide analog and a glutamic acid derivative. This purposeful chemical modification was developed to achieve highly targeted therapeutic effects.

The drug’s mechanism involves selective degradation of certain proteins to induce antiproliferative effects and immunomodulation. This clinically recognized action indicates that the medicine works by targeting specific molecular pathways that regulate cell growth and immune function, differentiating it from traditional, less selective therapies.

Classification, Form, and General Purpose

Lenalidomide is exclusively an oral dosage form, supplied as a single-ingredient product within capsules, enabling simple oral administration. The medicine contains the active ingredient and standard pharmaceutical excipients; it is not a combination drug. A unique factor differentiating this INN is that, due to its high potency, the drug is typically available only through a special restricted distribution program (e.g., REMS), underscoring the need for strict medical oversight and patient education.

Its classification as an Antineoplastic Agent points directly to its general therapeutic purpose: it is fundamentally used to assist in the management of specific conditions characterized by the excessive or abnormal proliferation of cells, such as certain hematological malignancies.

Lenalidomide functions as an agent that enhances immune cell function and inhibits pro-inflammatory factors. This indicates that Lenalidomide's general benefit comes from modifying the disease environment by boosting certain protective immune responses and simultaneously restricting the ability of abnormal cells to grow and sustain themselves.

What side effects are possible with Lenalidomide?

Lenalidomide: Possible side effects and safety information

The regulatory safety profile of Lenalidomide is defined by both highly frequent, manageable events and specific, serious adverse reactions documented in the official prescribing information from government authorities.

Very Common Adverse Reactions (ge 1/10)

The most commonly reported adverse reactions documented in clinical trials affect the blood and gastrointestinal systems. These include neutropenia and thrombocytopenia, often requiring dose adjustment, as well as anemia. Non-hematologic effects listed as very common include diarrhea, constipation, fatigue (asthenia), pyrexia (fever), muscle cramps, peripheral edema, and rash.

Serious Adverse Reactions and Safety Constraints

The official labeling includes a Boxed Warning for several serious risks:

  • Embryo-Fetal Toxicity (Teratogenicity): As a thalidomide analog, Lenalidomide is a known human teratogen that can cause severe, life-threatening birth defects. Due to this absolute risk, it is available only through a special restricted distribution program (e.g., REMS).
  • Hematologic Toxicity: The drug can cause severe neutropenia and thrombocytopenia. In patients with Myelodysplastic Syndromes, dose delay or reduction was required for a majority of patients in major studies due to these events.
  • Venous and Arterial Thromboembolism: There is a significantly increased risk of developing serious blood clots, specifically Deep Vein Thrombosis (DVT) and Pulmonary Embolism (PE). This risk may be further increased with concomitant use of certain other therapies.

Other serious reactions formally documented include Second Primary Malignancies (SPM), such as Acute Myelogenous Leukemia (AML), Severe Cutaneous Reactions (e.g., SJS, TEN, DRESS), and cases of Hepatotoxicity (liver failure) and Tumor Lysis Syndrome (TLS).

Population and Exposure Considerations

Specific safety considerations exist for certain populations, including Females of Childbearing Potential who must adhere to mandatory pregnancy prevention requirements. Since the medicine is primarily excreted by the kidneys, the official labeling stipulates that the starting dose must be adjusted for patients with renal impairment. The risk of SPMs is noted as an exposure-related pattern observed in controlled trials.

Overdose and Emergency Response

Lenalidomide Overdose and when to seek help

The information below summarizes the officially documented overdose manifestations and mandated emergency actions as stated in government regulatory sources.

Element Official Regulatory Description
Documented Overdose Manifestations The principal documented clinical manifestation associated with high-dose exposure is Haematological Toxicity (blood-related).
Physiological Systems Affected Primarily the Haematological System, leading to dose-limiting effects of Neutropenia (low white blood cell count) and Thrombocytopenia (low platelet count).
Population-Specific Notes Lenalidomide is substantially excreted by the kidney. This suggests that pre-existing renal impairment could increase drug exposure and potential severity of overdose.
Emergency-Response Statement Patients must call their healthcare provider right away or seek immediate medical attention upon suspicion of an overdose.

Overdose Classifications (High-Level)

Classification Aspect Official Regulatory Documentation Statement
Severity Classification The observed effects are classified as Dose-Limiting Toxicities, which necessitates immediate supportive care.
Overdose-Context Constraints No specific antidote is known. Management must consist of symptomatic and supportive treatment.

Official Overdose Statements:

The official overdose profile is defined by the risk of dose-limiting Haematological Toxicity, which is the primary documented consequence of high-dose exposure. Since no specific antidote is available, regulatory guidance universally mandates providing symptomatic and supportive treatment and requires immediate medical attention. Clinical management involves necessary monitoring of haematological parameters. The drug's dependence on renal excretion means patients with pre-existing kidney function impairment may experience a heightened risk of severe drug exposure.

Therapeutic Uses of Lenalidomide

What Lenalidomide Treats: Main Uses and Benefits

Lenalidomide is commonly used in clinical settings that involve heightened systemic burden related to specific hematological malignancies. It is applied across domains where additional symptomatic support is needed, addressing complex symptom clusters associated with blood cancers.

Controlling Multiple Myeloma and Lymphoma Progression

This domain is relevant for managing symptoms that interfere with daily comfort by helping to control the underlying disease process in Multiple Myeloma (MM), Mantle Cell Lymphoma (MCL), and select Follicular (FL) and Marginal Zone Lymphoma (MZL) types. The therapeutic goal is to manage the underlying disease activity, which supports the patient during difficult episodes by easing distress and is commonly used to help with sustaining periods of disease control in various treatment contexts.

Resolution of Transfusion-Dependent Anemia in MDS

A notable and highly specific use is for managing conditions characterized by periods of heightened symptoms in certain patients with lower-risk Myelodysplastic Syndromes (MDS), specifically those associated with the deletion 5q abnormality (5 q- syndrome). This is considered relevant for easing the debilitating symptom cluster of transfusion-dependent anemia, with the goal of reducing the need for blood support. This may assist with reducing the need for blood transfusions and contributes to easing the overall symptom load and supports general well-being during symptomatic phases.

“This medication is applied in scenarios requiring long-term assistance in symptom stabilization and helps manage chronic disease activity in specific blood cancers.”

Quick Fact: Relief for Anemia Symptoms Lenalidomide is commonly used to help with transfusion-dependent anemia in lower-risk Myelodysplastic Syndromes, providing support that assists with supporting day-to-day comfort by lessening the burden of frequent blood support.

Eligibility and Restrictions for Use

Lenalidomide is a medication with highly restrictive eligibility criteria established by regulatory agencies like the FDA and EMA.

Category Regulatory Status
Absolute Contraindications Pregnant women (known human teratogen causing severe birth defects); patients with a history of severe hypersensitivity (e.g., angioedema, Stevens-Johnson syndrome) to lenalidomide or similar compounds.
Conditional Eligibility Females and males of reproductive potential must strictly comply with a mandatory Pregnancy Prevention Programme (REMS/PPP) due to the risk of fetal exposure.
Organ Function Restriction A reduced starting dose is required for patients with moderate or severe renal impairment or those on dialysis, as the drug is primarily eliminated by the kidneys.
Age-Related Eligibility Use in the pediatric population (under 18 years) is generally not established due to a lack of safety and efficacy data.
Condition-Specific Exclusion Use in patients with Chronic Lymphocytic Leukemia (CLL) outside of controlled trials is not recommended due to observed increased mortality.

Compliance with the pregnancy prevention and distribution program is a fundamental condition for all eligible adults. Patients must also meet minimum required baseline hematologic values (e.g., Absolute Neutrophil Count and platelets) to initiate treatment.

What should I know about interactions with other medicines?

Interactions with other medicines and products

Lenalidomide's official regulatory profile for interactions is defined by specific pharmacokinetic changes and pharmacodynamic risk reinforcement, rather than extensive involvement with major metabolic pathways.


Pharmacodynamic and Contraindicated Combinations

Co-administration with Estrogen-Containing Therapies or Erythropoietin Stimulating Agents (ESAs) may increase the documented risk of venous thromboembolism (VTE). This heightened risk requires careful management as detailed in regulatory documents. Furthermore, Lenalidomide is formally contraindicated in females who are pregnant due to the risk of fetal harm. Use of live vaccines is generally not recommended due to the potential for reduced immune response resulting from Lenalidomide's immunomodulatory properties.

Pharmacokinetic and Exposure Considerations

Lenalidomide co-administration has been shown to increase the maximum plasma concentration (C max) and Area Under the Curve (AUC) of the cardiac glycoside Digoxin. Regulatory guidance requires periodic monitoring of Digoxin plasma levels when the two medicines are used together. In contrast, Lenalidomide is minimally metabolized by the liver, and government sources confirm no clinically significant interactions are expected via the Cytochrome P450 (CYP) enzyme system or drug transporters like P-glycoprotein. Although food reduces the rate and extent of oral absorption, Lenalidomide may be taken with or without food.

Mechanism of Action

Targeted Protein Destruction via Molecular Glue

Lenalidomide functions as a molecular glue-like modulator, binding to the protein Cereblon (CRBN), a component of the E3 ubiquitin ligase complex. This interaction induces a conformational change that enables the complex to recognize and destroy specific transcription factors, primarily Ikaros (IKZF1) and Aiolos (IKZF3). The resulting ubiquitination and subsequent proteasomal degradation of these proteins initiates apoptosis (programmed cell death) and restricts the proliferation of target cell populations.


Immunomodulation and Environmental Control

Lenalidomide simultaneously modulates the systemic physiological environment. It enhances the functional activity of host defense cells, such as T-cells and Natural Killer (NK) cells, resulting in enhanced host immune surveillance. Additionally, the drug suppresses pro-inflammatory mediators and inhibits the production of pro-angiogenic factors like VEGF, which are required for new blood vessel growth, which contributes to a local environment that restricts cell proliferation.

Dosage and Administration Information

Official Administration Guidelines for Lenalidomide

Lenalidomide is administered by the oral route and must be taken according to precise, structured dosing protocols.

Procedural Requirements

  • Intake: Capsules must be swallowed whole with water. Do not open, break, or chew the capsules. The dose should be taken at about the same time each day, and may be taken with or without food.
  • Missed Dose: If a dose is missed by less than 12 hours, the patient may take the dose. If more than 12 hours have elapsed since the usual time, the patient must skip the missed dose and take the next dose at the regular time.

Labeled Dosing and Schedule

Treatment follows a repeating 28-day cycle, with the specific daily dose and cycle pattern dictated by the medical condition.

Regimen Example Starting Dose Schedule Pattern
Multiple Myeloma (Combination) 25 mg once daily Days 1–21 of repeated 28-day cycles.
Myelodysplastic Syndromes (MDS) 10 mg once daily Days 1–21 of repeated 28-day cycles.
MM Maintenance 10 mg once daily Days 1–28 (continuous) of repeated 28-day cycles.

Special Dosing Conditions

  • Renal Impairment: Dose adjustments are required for patients with creatinine clearance (CLcr) < 60 mL/min, as lenalidomide is primarily eliminated by the kidneys. For example, the starting dose is generally reduced to 10 mg or 15 mg every other day for moderate to severe renal impairment. Patients on dialysis should take their dose following the dialysis procedure.

Recent Clinical Evidence

Research and Approved Uses

Lenalidomide is an immunomodulatory drug that has been studied in clinical trials for multiple hematologic cancers. Regulatory approvals for this medication include its use in Multiple Myeloma (MM), certain forms of Myelodysplastic Syndromes (MDS), and Mantle Cell Lymphoma (MCL) that has relapsed or progressed after specific prior therapies. Its use is also approved for certain patients with follicular lymphoma and marginal zone lymphoma.

Multiple Myeloma Evidence

Clinical research has extensively investigated lenalidomide in the treatment of Multiple Myeloma. Pivotal Phase 3 trials have documented its use:

  • Newly Diagnosed MM: Studies, such as the FIRST trial, demonstrated the use of lenalidomide in combination with low-dose dexamethasone in patients who are not candidates for autologous stem cell transplantation. Findings described outcomes related to progression-free survival (PFS) and overall survival (OS) compared to standard regimens at the time.
  • Post-Transplant Maintenance: Randomized controlled trials have reported the use of lenalidomide as a maintenance therapy following autologous stem cell transplantation (ASCT). Data from these trials described longer PFS times in the lenalidomide group compared to placebo.
  • Relapsed/Refractory MM: Lenalidomide combined with dexamethasone has also been studied for patients who have received at least one prior therapy.

Myelodysplastic Syndromes (MDS) Evidence

Lenalidomide has been studied for patients with transfusion-dependent anemia due to low- or intermediate-1–risk MDS associated with a deletion 5q cytogenetic abnormality. Research reports indicated changes in transfusion independence among patients with this specific genetic marker.

Key Studies & References

  1. Lenalidomide alone versus lenalidomide plus dexamethasone in previously untreated multiple myeloma: MM-015 trial

Frequently Asked Questions (FAQ)

Common questions about Lenalidomide (FAQ)


Q: What is Lenalidomide mainly used for?

A: Lenalidomide is officially indicated for the treatment of Multiple Myeloma, a cancer of the bone marrow, often used in combination with other medicines. According to official documents, it is also approved for certain types of Myelodysplastic Syndromes (MDS) and Mantle Cell Lymphoma (MCL).


Q: What is a 'Risk Evaluation and Mitigation Strategy' (REMS) program, and why is Lenalidomide part of one?

A: A REMS program is a risk management plan implemented by regulatory bodies to ensure that a medicine's benefits outweigh its serious risks. Lenalidomide is included in a REMS program because of the significant danger of severe birth defects if the drug is used during pregnancy. This official program requires specific risk minimization procedures, such as enrollment and regular monitoring, to manage this serious safety concern.


Q: Can Lenalidomide be used in children?

A: According to the official product information, studies have not established the safety and effectiveness of Lenalidomide in pediatric patients (children). Therefore, this medicine is not officially recommended for use in this age group.


Q: How does Lenalidomide work in the body?

A: Lenalidomide is officially categorized as an immunomodulatory agent. Regulatory documents state that it works by modulating the immune system and affecting processes within specific cancer cells. This mechanism is thought to contribute to its activity against cancer cells and its effect on immune system function, according to regulatory descriptions.


Q: If I miss a dose of Lenalidomide, what should I do?

A: Official prescribing information includes specific guidance on how to handle a missed dose, based on the time elapsed since the scheduled dose. Patients are advised to refer to the official instructions provided by their prescribing healthcare provider for this situation, as the exact timing is crucial to maintaining the treatment schedule.


Q: What should women of childbearing potential know about using this drug?

A: Due to the high risk of severe, life-threatening birth defects, the drug's official regulatory program requires women who can become pregnant to use two reliable methods of contraception. This contraception must begin four weeks prior to starting treatment, continue throughout the treatment period, and for four weeks after the final dose. The program also requires regular mandatory pregnancy testing to monitor for this risk.


Q: Is it safe to drive or operate machinery while taking Lenalidomide?

A: Official safety information indicates that Lenalidomide may cause side effects such as dizziness, tiredness, or blurred vision. Because of these potential effects, official labeling recommends caution regarding activities that require alertness, such as driving or operating heavy machinery, until the patient understands how the medicine affects them.

How should Lenalidomide be stored and disposed of?

Storage and Disposal of Lenalidomide

Lenalidomide capsules must be stored and disposed of according to specific regulatory requirements.

Storage Conditions

The medication must be stored at controlled room temperature, specifically between 20 C and 25 C (68 F and 77 F). Storage areas should be protected from excessive moisture and high humidity. It is mandatory to keep the drug in its original container and to store it locked up and out of the sight and reach of children.

Handling and Disposal

Capsules must be swallowed whole and must not be opened, broken, or chewed. If the powder contacts the skin, the area should be washed immediately. Due to restricted distribution rules, any unused, unwanted, or expired Lenalidomide must be returned to the dispensing pharmacy or healthcare provider for proper disposal. The medicine must not be discarded in household trash or flushed down the toilet or sink.

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

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