Doxopeg

Quick links to important sections

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 Doxopeg

Property Description
Active Ingredient Doxorubicin hydrochloride
Form Concentrate for solution for intravenous infusion
Pharmacological Class Antineoplastic agent, Cytotoxic Anthracycline
Common Use Addresses the growth and spread of malignancies
Origin Semi-synthetic (derived from Streptomyces peucetius var. caesius)

What Type of Medicine is Doxopeg? (Identity and Classification)

Doxopeg is a specialized medicine, defined by its active ingredient, Doxorubicin hydrochloride, as a Pegylated Liposomal Doxorubicin (PLD). It is firmly classified as an antineoplastic agent and belongs to the cytotoxic anthracycline group, a class of drugs known to interfere with cellular replication. Doxopeg is manufactured by Asofarma, an established pharmaceutical laboratory. The drug's identity as a liposomal formulation is clinically recognized for altering drug distribution in the body compared to its conventional counterpart.

Understanding Doxopeg's Specialized Liposomal Formulation (Composition and Form)

Doxopeg is prepared as a concentrate for solution for intravenous infusion in the form of a unique liposomal suspension. The formulation encapsulates the active ingredient within microscopic lipid spheres that are coated with methoxypolyethylene glycol (PEG). This key design feature of pegylation is intended to increase the drug's circulation time. This specialized, stealth nanoparticle system is a differentiating factor, as it is intended to allow for preferential accumulation in certain tissues with high vessel permeability.

What is the General Purpose of Doxopeg? (High-Level Function)

The general therapeutic purpose of Doxopeg is to utilize its potent cytotoxic action to damage and destroy actively proliferating abnormal cells, thereby addressing the growth and spread of malignancies. The drug's mechanism involves the Doxorubicin component disrupting the integrity of the cell's genetic material (DNA) and inhibiting the enzyme Topoisomerase II. The controlled delivery system is a central feature of the product's positioning, facilitating this cell-damaging activity by concentrating the drug in areas of disease. This general therapeutic approach is consistently employed in managing types of cancer.

Regulatory References

  1. Doxorubicin Hydrochloride - NCI

What side effects are possible with Doxopeg?

Possible Side Effects and Safety Information

The safety profile of Doxopeg (Pegylated Liposomal Doxorubicin) is officially documented by regulatory authorities, classifying possible adverse reactions based on frequency and affected physiological systems. This information is derived from official prescribing information, such as the EMA Summary of Product Characteristics and FDA Prescribing Information.

Frequency-Classified Effects

The most frequent adverse reactions are categorized as Very Common (affecting more than 1 in 10 patients) and include effects on the blood system (Neutropenia, Anemia), gastrointestinal system (Stomatitis and Mucositis), and skin (Palmar-plantar erythrodysesthesia or PPE, Alopecia). Other frequent reactions include Nausea, Vomiting, Fatigue/Asthenia, and Fever.

Serious Adverse Reactions and Cumulative Risks

Official labeling emphasizes the potential for serious adverse reactions, particularly those related to the cumulative dose and acute administration. The risk of Cardiotoxicity (myocardial damage) is a significant safety consideration that is generally linked to the total lifetime dose of doxorubicin administered. Acute, sometimes severe, Hypersensitivity or Anaphylactoid Reactions are also documented and can occur shortly after the start of the intravenous infusion.

Safety Considerations and Constraints

The regulatory safety profile includes specific constraints regarding patient conditions. Doxopeg is generally contraindicated in individuals with a history of severe hypersensitivity to its components. Furthermore, the product label notes the need for caution and potential dose modification in patients with hepatic impairment. The adverse reaction profile also reveals that some effects, such as PPE, are often observed only after multiple treatment cycles have been completed, a pattern associated with extended exposure.

Overdose and Emergency Response

Overdose and When to Seek Help

Official regulatory information for Doxopeg (Doxorubicin Hydrochloride Liposome) defines an overdose as a severe aggravation of the drug's known toxicities, which requires immediate and specialized medical management.

Documented Overdose Presentations

Acute overdosage is documented to cause a severe worsening of dose-limiting effects on the blood, heart, and skin/mucous membranes. These effects include severe myelosuppression (critical drops in blood cell counts such as neutropenia and thrombocytopenia) and an accelerated risk of irreversible cardiotoxicity (damage to the heart muscle, potentially leading to Congestive Heart Failure).

Other severe manifestations may include intense inflammation and ulceration of the mouth (severe stomatitis) and blistering of the palms and soles (severe Palmar-Plantar Erythrodysesthesia).

Required Emergency Actions

The regulatory profile explicitly states that no specific antidote is available for systemic Doxopeg overdose. Treatment is entirely symptomatic and supportive and requires hospitalisation due to the risk of severe complications, such as life-threatening infection (sepsis) from myelosuppression.

Immediate medical help is also required if drug leakage outside the vein (extravasation) is suspected. In this event, the infusion must be terminated immediately, and specific regulatory procedures must be followed to manage the acute local tissue damage risk. Children and adolescents are noted to be at an increased risk for developing delayed cardiotoxicity.

Therapeutic Uses of Doxopeg

Doxopeg is a specialized antineoplastic agent generally applied across domains where additional symptomatic support is needed in situations involving certain distressing symptoms. The medicine may be part of symptomatic management in challenging clinical situations.

Doxopeg is commonly used to help with advanced ovarian cancer, metastatic breast cancer, AIDS-Related Kaposi's Sarcoma (AR-KS), and Multiple Myeloma. It is applied in addressing conditions characterized by periods of heightened symptoms due to the accumulation of abnormal cells or when symptoms may intensify temporarily after prior chemotherapy.

It is commonly used to help with easing the overall symptom load and supports patients during symptomatic periods. This use is relevant for recurrent or progressive disease where short-term symptom stabilization is important.

“The treatment supports the patient during difficult episodes by easing distress and may assist with maintaining functional stability.”


Quick Fact: Relevant for Conditions Marked by Increased Physiological Stress

Eligibility and Restrictions for Use

Doxopeg use is strictly governed by regulatory criteria that define who is eligible and who is explicitly prohibited from treatment.

Populations Prohibited from Use (Contraindicated)

Doxopeg must not be used in certain patient populations. This includes individuals with a confirmed history of severe hypersensitivity reactions (e.g., anaphylaxis) to doxorubicin or any component of the liposomal formulation. It is also contraindicated for women who are pregnant or breastfeeding due to potential harm, and for patients with pre-existing severe myocardial insufficiency or recent heart attack.

Conditional and Restricted Use

Eligibility is conditional on a patient’s medical history and current clinical status. Use is restricted for patients who have reached or are approaching the lifetime cumulative dose limit for anthracyclines, which poses a significant risk of cardiotoxicity. Patients with impaired hepatic function may require a dose reduction based on elevated bilirubin levels. Furthermore, administration is conditional on the patient’s blood cell counts, as treatment must be suspended if neutrophil or platelet counts fall below specified minimum regulatory thresholds.

Age-Related Eligibility

Doxopeg is approved for the adult population. Its safety and effectiveness have not been established in pediatric patients (children and adolescents), and its use in this age group is not recommended by regulatory bodies.

What should I know about interactions with other medicines?

Interactions with other medicines and products

Regulatory documentation defines the interaction profile of Doxopeg (Doxorubicin liposome injection) through two primary classifications: pharmacokinetic exposure modification and pharmacodynamic toxicity risk. All interaction statements are derived from official government prescribing information.

Pharmacokinetic and Metabolic Interactions

Co-administration with medicinal products that inhibit or induce Cytochrome P450 (CYP) enzymes (specifically CYP3A4 and CYP2D6) or the P-glycoprotein (P-gp) efflux pump is advised against. Official labels state that inhibitors of these pathways may increase the plasma concentration of doxorubicin, while inducers may cause a decrease in exposure. A timing rule is mandated with Paclitaxel; Doxopeg must be administered prior to Paclitaxel if co-used, to prevent an increase in doxorubicin plasma concentrations.

Pharmacodynamic and Restricted Combinations

Specific combinations are classified due to heightened safety concerns. Trastuzumab is formally listed as a contraindicated combination because of the documented increased risk of cardiac dysfunction. Furthermore, the use of Doxopeg requires accounting for the total cumulative dose from any other anthracyclines or anthracenediones due to the additive risk of cardiomyopathy. Patients with a history of Prior Mediastinal Irradiation are also noted to be at an increased risk of cardiotoxicity at lower doses. The solution must not be mixed with other drugs due to physical incompatibility.

Mechanism of Action

Doxopeg functions through two complementary mechanistic domains: the direct cytotoxic action of the active molecule, Doxorubicin, and a specialized liposomal delivery system that influences the drug's distribution.


Genetic Damage and Apoptosis Induction

The core mechanism involves Doxorubicin causing molecular damage within the target cell. It acts as a Topoisomerase II inhibitor, stabilizing the enzyme's complex with DNA to generate permanent, irreparable DNA double-strand breaks. This severe genetic damage activates the DNA Damage Response pathway, initiating a cascading sequence of events that results in apoptosis (programmed cell death), which is the primary physiological consequence for inducing programmed cell death in highly proliferative cells.


Targeted Distribution and Mechanistic Constraints

The drug is encapsulated in a pegylated liposome for prolonged circulation. This delivery system mechanistically exploits the Enhanced Permeability and Retention (EPR) effect to achieve selective concentration and slow, sustained release of Doxorubicin directly into the target environment. However, the mechanism is physiologically constrained by efflux transporter proteins (like P-glycoprotein) which actively pump Doxorubicin out of the cell, and by EPR effect heterogeneity, both resulting in an attenuated cytotoxic physiological response.

Dosage and Administration Information

Doxopeg is administered exclusively as an intravenous infusion under the supervision of a qualified specialist, and it is strictly prohibited to administer the medicine as a bolus injection or by any other route. The proper use of the medicine is governed by established clinical protocols.

Preparation and Administration Method

Before administration, the concentrate must be diluted only in 5% Dextrose Injection, USP. The official instruction prohibits mixing the solution with any other drugs or diluents. The infusion must begin at a slow, initial rate of 1 mg/min. If this rate is well tolerated, the infusion is typically increased to complete the entire administration over a period of approximately one hour (60 minutes).

Dosing and Schedule Patterns

Dosing is calculated using the patient’s body surface area in mg/m^2, with the specific dose mandated to vary by indication; for instance, 50 mg/m^2 is specified for ovarian cancer, while 20 mg/m^2 is used for AIDS-Related Kaposi's Sarcoma (AR-KS). The treatment follows a defined cyclic schedule, with administration intervals typically set at every three or four weeks. Treatment duration is conditional, often continuing for a minimum number of cycles or until specific criteria are met.

Population-Specific Adjustments

The official protocol includes mandatory dose adjustments for patients with hepatic impairment. The calculated dose must be reduced by one-half or one-quarter if specific serum bilirubin levels exceed established thresholds, ensuring the administration is conditional upon these laboratory values and clinical parameters.

Recent Clinical Evidence

Research evidence / Overview of Studies for Doxopeg

The available evidence for Doxopeg comes from official clinical research, including large-scale Randomized Controlled Trials (RCTs) and scientific reviews. These studies primarily aim to understand how the medicine was evaluated in specific cancer types, what types of changes were observed in patients, and how the medicine was monitored alongside patterns of disease progression. Research provides context but not individual predictions; findings describe group patterns, not personal outcomes.


Evidence for use in Advanced Ovarian Cancer

This section summarizes the structure of Randomized Controlled Trials (RCTs) and meta-analyses that were part of the evidence base for recurrent ovarian cancer. The primary focus of this research examined the duration of time until the disease worsened (Progression-Free Survival or PFS) and the Overall Response Rate across adult women whose cancer had returned. Some trials described patterns of Progression-Free Survival that were recorded by researchers, with findings recorded in comparison to other established treatments.

Evidence for use in Metastatic Breast Cancer

For metastatic breast cancer, Randomized Controlled Trials were studied for how the medicine was evaluated in relation to conventional chemotherapy agents. The research primarily examined outcomes related to systemic or functional imbalance, specifically focusing on the time until the disease worsened (Time to Progression or TTP). The studies also contributed to understanding the difference in reported patterns related to cardiac events when the liposomal form was observed in the trials, compared to the conventional version of the drug.


What is Still Uncertain About the Research for Doxopeg

The evidence highlights what is known—and what is still uncertain. Comparative evidence is lacking for direct comparisons with every available newer therapy used across the indications. Research describes patterns related to differences between outcomes recorded in highly controlled Randomized Controlled Trials and data collected from more varied real-world clinical usage. Overall, the long-term effects are not fully established, requiring additional studies conducted over extended periods to provide a more complete picture of outcomes.

Frequently Asked Questions (FAQ)

Common questions about Doxopeg (FAQ)

Q: What specific conditions is Doxopeg approved to treat?

A: According to official regulatory documents, Doxopeg is indicated for the treatment of specific malignancies. These indications include ovarian cancer, often following treatment with platinum-based therapy. It is also approved for AIDS-Related Kaposi's Sarcoma and, in combination with other medicines, for multiple myeloma.


Q: How does Doxopeg differ from other medicines used for similar conditions?

A: Doxopeg is distinguished by its specialized delivery system, which involves encapsulating the active drug in microscopic lipid spheres called pegylated liposomes. This design is intended to prolong the drug's circulation time in the body and change how it is distributed. The liposomal design is a characteristic that sets it apart from the conventional form of the drug.


Q: Is Doxopeg considered a first-line treatment option?

A: Official indications define how the medicine is used in treatment plans. For many uses, Doxopeg is prescribed after previous therapies have failed or as part of a combination regimen with other agents. This often indicates that it is typically not used as a first-line treatment on its own.


Q: Is Doxopeg available in a generic version?

A: Yes, the active ingredient in Doxopeg, which is doxorubicin hydrochloride liposome injection, is available in FDA-approved generic versions. This availability is based on general regulatory information for the drug class.


Q: Are the side effects of Doxopeg known to be temporary?

A: The duration of side effects can vary greatly. Acute infusion-related reactions, for instance, are sometimes temporary and may resolve within hours after the infusion ends. However, other risks, such as cardiotoxicity (heart damage), are safety considerations that are generally linked to the total cumulative dose received over time.


Q: Is it normal to feel a specific sensation when first starting Doxopeg?

A: Yes, the regulatory safety profile documents that infusion-related reactions are a possibility, especially during the first administration. These reactions can include physical sensations such as flushing, chills, headache, and a feeling of tightness or pain in the chest or back. Monitoring for these effects is a part of the administration procedure performed by the healthcare team.


Q: Are there any long-term side effects associated with Doxopeg use?

A: Yes, the primary long-term safety concern is the risk of heart damage, known as cardiomyopathy. Official labeling indicates this risk is generally related to the total cumulative lifetime dose of the active ingredient administered. This is why cardiac function is monitored throughout the course of treatment.


Q: What should be done if a side effect is experienced while taking Doxopeg?

A: Regulatory-aligned patient information recommends informing the prescribing physician or nurse promptly if any side effect or symptom is experienced. The healthcare team should be notified immediately for serious symptoms such as fever, excessive bleeding, or a severe rash.


Q: Does Doxopeg cause weight gain or weight loss?

A: Weight changes can be related to the use of Doxopeg. Weight loss is listed as a potential adverse reaction in official safety information. Conversely, sudden weight gain due to fluid retention is a serious symptom noted in patient safety materials that requires immediate evaluation by a healthcare professional.


Q: Can Doxopeg affect sleep patterns?

A: The official adverse reaction tables list common effects such as fatigue and weakness. While these effects are known to impair physical ability, there is no direct evidence in the regulatory documents stating that the drug specifically alters sleep architecture. Any side effect that impacts comfort or general well-being could indirectly affect sleep patterns.


Q: Does Doxopeg interact with common over-the-counter medicines like cold remedies?

A: The regulatory label advises caution with any product that affects certain metabolic enzymes, specifically CYP3A4, CYP2D6, and P-glycoprotein. Because some common over-the-counter medicines or cold remedies can inhibit or induce these pathways, it is important to inform the prescriber of all medicines taken.


Q: Can herbal supplements or vitamins cause an interaction with Doxopeg?

A: Official regulatory documents advise caution with products that affect key metabolic pathways, such as CYP3A4. Some herbal supplements are known to influence these pathways, which could potentially increase or decrease the concentration of Doxopeg in the body. For this reason, all herbal supplements and vitamins should be disclosed to the healthcare team.


Q: Are there any medical tests that can be affected by taking Doxopeg?

A: Administration of Doxopeg is conditional on the results of several mandatory medical tests. These include assessment of the heart's function, often via tests like an echocardiogram, due to cardiotoxicity risk. Dose adjustments may be necessary based on the results of blood cell counts and liver function tests, such as serum bilirubin levels.


Q: What should be done if an interaction is suspected?

A: Official patient information strongly recommends immediately informing your healthcare provider or pharmacist if you suspect an interaction or if you begin taking any new medication or supplement. This practice assists the care team in evaluating the combination and addressing potential risks.


Q: What happens if Doxopeg does not seem to be working?

A: Treatment with Doxopeg is continued until the disease progresses or the patient experiences unacceptable toxicity. If a lack of effect is observed, the prescribing physician may re-evaluate the treatment plan based on clinical monitoring and the established outcomes described in research studies.


Q: How will a person know if Doxopeg is actually having an effect?

A: The effectiveness of Doxopeg is determined through measurements monitored by the healthcare team. The physician typically uses similar measurements to monitor disease status and track the drug’s ongoing effect, based on efficacy endpoints from clinical trials like Progression-Free Survival (PFS) and Overall Response Rate (ORR).


Q: Can older adults or elderly individuals use Doxopeg safely?

A: Doxopeg is approved for use in the adult population, which includes older adults. Regulatory information suggests that careful monitoring of cardiac function is especially important in the elderly population. The prescribing information notes that reduced doses or longer intervals between treatment cycles may be considered for older or heavily pre-treated patients.


Q: Does Doxopeg affect a person's ability to drive or operate machinery?

A: Common adverse reactions listed in the safety profile include fatigue, headache, and dizziness. If these or any other side effects affect concentration, judgment, or physical coordination, functional activities, such as driving or operating heavy machinery, may be impaired.


Q: Are there any ongoing clinical trials or new research updates for Doxopeg?

A: Yes, official sources such as the NIH Clinical Trials database show that Doxopeg is still actively being studied in numerous ongoing clinical trials. This research often examines its use for various cancers, sometimes in combination with investigational or newer therapeutic agents.


Q: How effective is Doxopeg according to published studies?

A: Studies supporting the drug's use for approved indications have shown specific clinical outcomes. These findings, often recorded in comparison to other established treatments, include specific figures for Progression-Free Survival (PFS) and Overall Response Rates (ORR). The findings from these trials provide the evidence base for its use in the approved populations.


Q: Where can I find the official prescribing information for Doxopeg?

A: The complete and official prescribing information for Doxopeg is published and made available on government websites. You can typically find these detailed documents on resources such as the US FDA’s Drugs@FDA database, the NIH's DailyMed website, or the European Medicines Agency (EMA) website.


Q: Why do people choose Doxopeg over similar medications?

A: Clinical decisions regarding Doxopeg are related to its established effectiveness in specific indications. The formulation is specifically designed to alter the distribution of the drug. Clinical information suggests this liposomal formulation may affect the frequency of some toxicities compared to the conventional version of the active drug.


Q: Does Doxopeg require any special monitoring by a healthcare professional?

A: Yes, official safety constraints mandate special monitoring by a healthcare professional throughout treatment. This includes regular assessment of the heart's function, typically via tests like an echocardiogram, to track the risk of cardiotoxicity. Blood cell counts and liver function tests are also routinely monitored to guide dose adjustments.

How should Doxopeg be stored and disposed of?

Storage and Handling Requirements

Doxopeg (Doxorubicin HCl Liposome Injection) is a cytotoxic drug that requires strict adherence to documented handling and storage conditions to maintain its integrity and ensure safety.

Condition Requirement (Official Labeling)
Temperature (Unopened & Diluted) Must be stored in a refrigerator at 2 C to 8 C (36 F to 46 F).
Freezing/Protection The product must not be frozen and should be kept in the original outer carton to protect from light.
Stability Limit (Diluted) The solution must be administered within 24 hours of preparation.
Visual Inspection Do not use if a precipitate or foreign matter is present.
Mixing/Container Do not mix with other drugs. Partially used vials must be discarded.

Disposal and Safety

  • Cytotoxic Waste: Disposal must follow applicable special handling and disposal procedures for cytotoxic drugs.
  • Environmental Restriction: Do not dispose of Doxopeg via wastewater or routine household waste.
  • Child Safety: Keep this medicine out of the sight and reach of children.

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

Available in countries:

Equivalent of Doxopeg found in:

A-Z Index: