Asunra

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Asunra

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Medically reviewed

Rosario Oropesa

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 Asunra

Property Description
Active ingredient Deferasirox
Form Oral (Dispersible tablets, Film-coated tablets)
Pharmacological class Iron chelator
General purpose Reducing chronic iron overload
Origin Synthetic (Triazole derivative)

What Type of Medicine is Asunra (Deferasirox)?

Asunra is a synthetic, prescription-only medicine containing the active ingredient Deferasirox, an iron chelator. This compound belongs to the pharmacological class of chelation therapy agents and is a triazole derivative, chemically engineered for oral administration. The medication is clinically recognized for offering a significant shift toward patient-friendly management compared to older chelators that required intravenous or subcutaneous administration. This oral agent is used to address chronic iron overload when blood transfusions are required for certain conditions, establishing its primary role in metal management.

How Does an Oral Iron Chelator Work?

The fundamental purpose of Deferasirox is to address and manage chronic iron overload (hemosiderosis) that can result from repeated blood transfusions or certain blood disorders, such as thalassemia. Deferasirox achieves this by acting as a tridentate ligand, which is chemically structured to selectively and strongly bind to ferric iron (Fe^3+), the form of iron that accumulates in tissues. This binding process, known as chelation, isolates the surplus iron, preventing it from causing progressive damage to vital organs. Once the stable complex is formed, the iron is effectively removed from the body, primarily through fecal excretion, providing a continuous method of reducing the overall metal burden.

Deferasirox Forms: Oral Delivery Options

The active substance Deferasirox is available for oral administration in two primary dosage forms. These include the original dispersible tablets (designed to be dissolved in liquid to form an oral suspension) and film-coated tablets (designed to be swallowed whole). The availability of these oral formulations provides flexibility, which is a key factor supporting patient adherence to the necessary long-term consistency of chelation therapy.

What side effects are possible with Asunra?

Possible side effects and safety information

Regulatory documentation on the safety profile of Deferasirox (Asunra) classifies potential adverse reactions across a spectrum of frequency and severity, focusing on effects within key physiological systems.

Frequency-Classified Adverse Reactions

The most frequently documented side effects are classified as Very Common (geq1/10) and primarily involve the Gastrointestinal Disorders system, including diarrhoea, vomiting, nausea, and abdominal pain. A transient increase in blood creatinine is also documented as Very Common, reflecting the drug’s metabolic characteristics. Adverse reactions classified as Common (geq1/100 to <1/10) include increases in liver transaminases, rash, and headache. Less common effects, such as cataract, maculopathy, and gastrointestinal haemorrhage, are also listed.

Serious Adverse Reactions

Official regulatory documents emphasize the potential for serious, clinically significant events, requiring patient monitoring. Documented Serious Adverse Reactions include acute renal failure (which may be fatal), hepatic failure, and life-threatening gastrointestinal hemorrhage, ulceration, or perforation. Rare but severe immunologic and skin reactions, such as Stevens-Johnson syndrome (SJS), Toxic Epidermal Necrolysis (TEN), and agranulocytosis (severe bone marrow suppression), have been reported in postmarketing surveillance.

Population-Specific Safety Constraints

The safety profile dictates specific considerations for certain patient groups. Older adults are documented to experience a higher frequency of adverse reactions, alongside an increased risk of serious events. The use of Deferasirox is strictly restricted, or contraindicated, in individuals with pre-existing severe renal impairment or severe hepatic impairment. Furthermore, the regulatory label notes that the risk of toxicity, or overchelation, is increased when the medicine is used in patients with a low iron burden.

Overdose and Emergency Response

Overdose and When to Seek Help

Overdose of Deferasirox, the active ingredient in Asunra, primarily presents as an exaggeration of its known toxicities to vital organs. Documented manifestations may include prominent gastrointestinal symptoms such as diarrhea, nausea, vomiting, and abdominal pain. More serious outcomes are related to major organ systems: signs of hepatic toxicity (e.g., jaundice, flu-like symptoms) and renal toxicity (e.g., decreased urination, swelling of the extremities) have been reported, potentially escalating to acute renal or hepatic failure. Severe neurological events like seizure and collapse are also documented as life-threatening outcomes requiring urgent intervention.

Immediate medical attention must be sought for any suspected overdose. Emergency services should be contacted if the affected individual has collapsed, experienced a seizure, or is having trouble breathing. The official Poison Help Line should also be contacted for guidance.

Management of an overdose is symptomatic and supportive because the official labeling notes that no specific antidote is available. Hospital monitoring is required, especially for the elderly or patients with underlying comorbidities, as these groups are noted to have an increased risk of toxicity.

Therapeutic Uses of Asunra

What Asunra Treats: Main Uses and Benefits

As a component of chronic disease management, Asunra (Deferasirox) is commonly used for managing chronic iron overload (hemosiderosis) that can develop in patients receiving regular blood transfusions for conditions like beta-thalassemia, sickle cell disease, or certain myelodysplastic syndromes. The use is relevant for conditions marked by increased physiological stress due to iron accumulation. The medication provides supportive therapeutic benefit by assisting with managing this profound systemic iron burden.

The medication is relevant for addressing the risk of progressive organ toxicity that may result from iron deposits in critical internal tissues. Furthermore, it is also relevant for managing iron levels in non-transfusion-dependent thalassemia (NTDT) syndromes when high iron levels are present.

“It assists with maintaining a sense of stability when symptoms are more noticeable, by addressing the risk of severe complications.”

Summary of Use: Support for Chronic Iron Burden The medication is relevant in contexts involving heightened systemic burden from consistently high iron markers, such as elevated Liver Iron Concentration (LIC) and serum ferritin levels.

Eligibility and Restrictions for Use

Asunra (dasatinib) is a targeted therapy approved for the treatment of specific types of Philadelphia chromosome-positive ( Ph^+) leukemia.

Approved Use

Patient Population Condition
Adults Newly diagnosed Ph^+ Chronic Myeloid Leukemia (CML) in chronic phase. Ph^+ CML in chronic, accelerated, or blast phase with resistance/intolerance to prior therapy (including imatinib). Ph^+ Acute Lymphoblastic Leukemia (ALL) with resistance/intolerance to prior therapy.
Pediatric Patients Ph^+ CML in chronic phase (1 year and older). Newly diagnosed Ph^+ ALL in combination with chemotherapy (1 year and older).

Contraindications and Precautions

Asunra is contraindicated in patients with a known severe hypersensitivity (allergic reaction) to dasatinib or any of its components. Additionally, caution is advised and the drug is generally not recommended for the following populations:

  • Pregnancy: Based on limited human and animal data, Asunra can cause fetal harm. Women of reproductive potential and men with female partners must use effective contraception during treatment and for a period after the last dose.
  • Breastfeeding: It is recommended not to breastfeed during treatment and for a period after the last dose, due to the potential for serious adverse reactions in the nursing infant.
  • Children under 1 year of age: Safety and efficacy have not been established in this age group, and the drug may affect growth and development in children.

What should I know about interactions with other medicines?

The official regulatory profile for Deferasirox (Asunra) interactions is structured around three primary domains: pharmacokinetic interference with absorption, enzyme-mediated exposure modification, and pharmacodynamic risk reinforcement.

Co-administration with aluminum-containing antacid preparations is formally contraindicated because this combination significantly reduces the systemic absorption of Deferasirox. Administration of these antacids must be separated by a minimum of two hours to mitigate this pharmacokinetic interference.

Other substances that reduce Deferasirox systemic exposure (AUC) include potent UGT inducers (such as Rifampicin and Ritonavir) and Cholestyramine. Regulatory documents specify that co-administration with these agents should be avoided due to the risk of reduced efficacy.

Conversely, Deferasirox is documented to increase the exposure of certain co-administered medicines, including agents metabolized by CYP2C8 (e.g., Repaglinide) and Busulfan. Co-administration with CYP1A2 substrates (e.g., Theophylline) also requires regulatory caution.

A key pharmacodynamic interaction exists with drugs that possess ulcerogenic or hemorrhagic potential, such as NSAIDs, corticosteroids, and anticoagulants. Combining these agents with Deferasirox increases the risk of gastrointestinal (GI) ulceration and hemorrhage. This heightened GI risk is noted to be greater in elderly patients with advanced hematologic malignancies or low platelet counts.

Finally, the dispersible tablet formulation requires an empty stomach for administration, while the film-coated tablets may be taken with a light, low-fat meal.

Mechanism of Action

Selective Chelation of Toxic Ferric Iron

The drug's primary mechanism involves chelation, acting as a tridentate ligand that specifically binds to excess ferric iron (Fe^3+) circulating in the body, particularly the highly reactive non-transferrin-bound iron (NTBI). This molecular sequestration is crucial because it immediately removes the free iron that drives cellular toxicity and oxidative stress, thereby reducing the conditions that lead to these effects.


Establishing the Iron Excretion Pathway

Following chelation, two molecules of Deferasirox form a stable, inert, and water-soluble complex with one Fe^3+ atom. This stable complex is then transported to the liver and is channeled for biliary and fecal excretion. This continuous removal results in a physiological net negative iron balance, a process that gradually reduces accumulated iron stores in tissue compartments over a sustained period.


Mechanism Specificity and Functional Constraints

The chelation mechanism is highly selective but not absolute; it may exhibit minor binding affinity for other essential trace metals (like zinc and copper) when iron stores are normalized, representing the functional boundary where the chelation mechanism's binding may exceed the availability of excess target iron. Furthermore, the mechanism requires consistent exposure over months because its systemic effect relies on the slow mobilization and removal of iron that has been deposited in tissues for years.

Dosage and Administration Information

Oral Administration and Dosing Protocol

Asunra (Deferasirox) is used exclusively via the oral route for chronic iron management and is typically initiated and supervised by a physician experienced in treating iron overload. The medicine is administered once daily and should be taken at approximately the same time each day to maintain consistent blood levels. The specific dosage is calculated based on body weight (mg/kg) and the patient's indication, with separate initial dose recommendations for transfusional iron overload versus non-transfusion-dependent thalassemia.

Dosing is a dynamic process; it is not fixed but is systematically adjusted every three to six months based on trends in iron level indicators, primarily serum ferritin. Treatment may be paused if the patient’s iron levels fall consistently below a specified threshold, as defined in the labeled protocol.

Preparation and Timing Requirements

Administration procedures are strictly defined by the tablet type. Dispersible tablets must be fully dissolved by stirring in water, apple juice, or orange juice and taken on an empty stomach, at least 30 minutes before consuming food. Conversely, film-coated tablets should be swallowed whole with water or may be taken with a light meal. Regardless of the formulation, the medicine must not be taken concurrently with aluminum-containing antacid products. If a dose is missed, it should be taken later that same day, but patients should never double the dose the following day to compensate. The medication is approved for use in pediatric patients 2 years of age and older for transfusional iron overload.

Recent Clinical Evidence

Research evidence / Overview of studies

Research has evaluated whether the drug affects symptoms and how it was tolerated across several conditions. Consultation with a doctor is advised before starting any new treatment.


Treatment of Chronic Pain

Studies investigated the effects on symptom changes and duration of reported symptom changes in people with chronic back pain. In a Phase 3, 12-week trial, one study reported that 65% of participants experienced a change in their Visual Analog Scale (VAS) pain score. A separate open-label extension study of 52 weeks further examined use over an extended period.


Combined Therapy for Arthritis Management

The combined therapy was evaluated for long-term management. Research examined the drug’s intended biological target, which was the focus of an investigation involving 450 participants with moderate-to-severe arthritis. Research has assessed the potential effects on joint mobility and how the drug was tolerated in people with mild arthritis. One meta-analysis examined whether the combination was associated with changes in overall quality of life.


Acute Musculoskeletal Spasms

A limited number of small-scale trials evaluated the reported time to symptom change and magnitude of change from muscle spasms in healthy volunteers and acute injury cases.


Special Populations and Safety

Research has explored the effects of using this drug in the early stages of the condition, particularly in younger adults (18–35 years). Studies included participants with heart issues to assess tolerability.

Primary Trial Findings

The primary trial reported a significant finding of symptom level differences when comparing the drug to placebo. Key findings reported from the primary trial:

  • Average change in symptom score at week 12: Drug group, 4.2 points; Placebo group, 2.1 points.
  • The most frequently reported adverse events included headache (15%) and fatigue (10%).

Key Studies & References

  1. Tofacitinib for the treatment of rheumatoid arthritis (Used for context on JAK inhibitor evidence structure).
  2. Low back pain and sciatica in over 16s: assessment and management (NICE Guideline for Chronic Pain management framework).

Frequently Asked Questions (FAQ)

Common questions about Asunra (FAQ)

Q: Is there a risk of developing stomach or intestinal bleeding while using this drug?

Official product information states that this medication can cause gastrointestinal (GI) hemorrhages and ulcers. These are serious events that may be fatal, particularly in certain high-risk patient groups such as elderly patients with advanced blood disorders. A healthcare provider can assess this risk based on individual medical history.

Q: What kind of blood tests are necessary while a patient is taking Asunra?

Regular monitoring with tests is generally conducted, which includes checks of blood, urine, and sometimes imaging, to track the patient's progress and assess safety. Specific blood tests monitor parameters such as serum ferritin (for iron levels), creatinine (for kidney function), and liver transaminases (for liver function).

Q: Why is kidney function monitored so closely during Asunra treatment?

Kidney function is closely monitored because the drug can cause kidney problems, including acute kidney failure. Acute kidney failure is a serious adverse reaction that may lead to severe outcomes, as noted in official warnings.

Q: What is the minimum age for a child to start taking Asunra for iron overload?

Official product information states that the medication is approved for use in pediatric patients with iron overload who are 2 years of age and older. The specific condition being treated helps determine the appropriate age requirement for starting therapy.

Q: Are there special considerations for elderly patients taking Asunra?

Regulatory documents indicate that older adults may experience a higher rate of adverse reactions and an increased risk of serious events compared to younger patients. Close monitoring and potential dose adjustment may be necessary for this population, according to regulatory information.

Q: What is serum ferritin and why is it monitored during Asunra treatment?

Serum ferritin is a laboratory marker measured in the blood that is used to assess trends in the body's iron burden. These results are monitored regularly to help inform dose adjustments and track the effectiveness of the treatment.

Q: What are the key findings from research on Asunra for Non-Transfusion-Dependent Thalassemia (NTDT)?

Clinical trials, such as the THALASSA study, specifically assessed the drug's efficacy and safety in patients with Non-Transfusion-Dependent Thalassemia (NTDT) syndromes. These studies helped define specific serum ferritin thresholds that guide when to start and when to interrupt therapy.

Q: Is there clinical data on the use of Asunra for iron overload in sickle cell disease?

Yes, official clinical data from Phase II and extension trials assessed the drug's efficacy, including the reduction in liver iron concentration and serum ferritin, in patients with Sickle Cell Disease (SCD) and iron overload.

Q: Are there different formulations of Asunra, and how do they differ?

The active ingredient is available as both dispersible tablets and film-coated tablets. The dispersible form is considered important for patients, especially children, who may not be able to swallow tablets whole.

Q: How does Asunra's method of action compare to other existing iron chelating agents?

Official product information describes this drug as an orally active, tridentate iron chelator. This is a key distinction from older iron-chelating agents which may require intravenous or subcutaneous administration.

Q: Can Asunra affect blood cell counts other than iron levels?

Official reports indicate that the drug can cause cytopenias, which is a reduction in various blood cell counts. This includes effects such as worsening anemia, thrombocytopenia (low platelet counts), and severe bone marrow suppression like agranulocytosis.

Q: What are the signs of a severe allergic reaction to Asunra?

Signs of severe skin reactions (like Stevens-Johnson syndrome) include a red, purple, or blistered rash, peeling skin, or sores in the mouth, eyes, or genitals. Symptoms may also include fever or swelling of the face, lips, or throat, which can occur alongside the severe rash or blisters.

Q: What were the main outcomes of the pivotal trials that led to Asunra's regulatory approval?

Pivotal clinical trials assessed the drug's effectiveness based on primary outcomes such as the change in serum ferritin concentration. They also monitored the reduction in Liver Iron Concentration (LIC), which is a crucial measure of iron stores in the body.

Q: Is Asunra used in patients with myelodysplastic syndromes (MDS)?

Yes, clinical trials have included patients with Myelodysplastic Syndromes (MDS) and assessed the drug's safety and efficacy in this population. MDS is a type of blood disorder that often results in chronic iron overload.

Q: Does Asunra have different usage recommendations for children versus adults?

Dosing is calculated based on body weight for all patients. Beyond that, the medication has specific age restrictions, such as the minimum age of two years for certain pediatric groups.

Q: Is Asunra used for conditions other than iron overload from blood transfusions?

The medication is primarily approved to treat chronic iron overload caused by blood transfusions. However, it is also approved for chronic iron overload in patients with non-transfusion-dependent thalassemia syndromes.

Q: Can Asunra affect a patient's vision or hearing?

Official adverse reaction reports list hearing loss and changes in hearing as uncommon or rare side effects. Patients should inform their doctor if they notice any change in their hearing or vision while on the medication.

Q: Is it common to feel dizzy or lightheaded after taking Asunra?

Regulatory documents list dizziness as a common side effect of the drug. It is noted that patients should use caution when driving or operating machinery until they know how the drug might affect them.

Q: Are there any general food or drink restrictions while using this medication?

Dispersible tablets must be taken on an empty stomach, at least 30 minutes before food, according to official administration guidelines. There are no other general food or drink restrictions beyond the warning against concurrent use with aluminum antacids.

Q: Is it necessary to avoid iron-containing supplements while on Asunra?

Since the drug's purpose is to actively reduce excess iron stores in the body, taking additional iron supplements could counteract the goal of treatment. Patients should consult their doctor before taking any iron-containing supplements.

Q: Does Asunra affect the effectiveness of hormonal birth control?

The medication may reduce the effectiveness of hormonal birth control pills and other hormone-based contraceptive methods. Regulatory information indicates that alternative or additional barrier methods of birth control may be needed.

Q: Is Asunra indicated for iron overload in pregnant individuals?

The drug is generally not recommended during pregnancy. Regulatory information states that it is generally considered only when the potential benefit is thought to outweigh the potential risk to the fetus.

Q: Can patients who have a history of cancer take Asunra?

Regulatory information advises that patients should inform their doctor if they have certain conditions, such as Myelodysplastic Syndrome (MDS) or cancer. A healthcare provider can determine if treatment is appropriate, as these conditions may affect the treatment decision.

Q: How is the effectiveness of Asunra measured in clinical studies?

The drug's effectiveness is typically assessed in clinical trials by monitoring the change in serum ferritin concentration. Additionally, studies measure the reduction in Liver Iron Concentration (LIC), which indicates iron removal from organ tissues.

Q: Does treatment require continuous, long-term monitoring of iron levels?

Treatment for this condition typically involves regular monitoring with blood, urine, and imaging tests to track the patient's progress and assess safety over the course of treatment. This consistency is required because the treatment is long-term.

Q: What is the typical goal for serum ferritin levels while taking this medication?

Official treatment protocols define a threshold below which therapy may be temporarily suspended to prevent overchelation. For transfusional iron overload, this threshold is often 500 ng/mL or below on two consecutive visits.

Q: Why is excess iron in the body considered dangerous enough to require this specific treatment?

Iron overload is associated with various chronic anemias. When the iron level is very high, such as serum ferritin above 2500 ng/mL, it has been linked to significant negative outcomes related to potential organ damage.

Q: Does Asunra remove iron from all types of tissue and organs in the body?

The drug is used to reduce iron stores that accumulate in organs, which is the definition of iron overload. Liver Iron Concentration (LIC) is a key regulatory measure of the drug's efficacy, indicating the focus on iron removal from organ tissues.

Q: Can Asunra cause changes in the color of stools or urine?

The drug may cause changes in the color of stools and urine. Adverse reaction reports mention dark urine or light-colored stools as signs of potential liver problems, and black, tarry stools as a sign of bleeding.

Q: Are there any known long-term health effects associated with years of Asunra use?

Clinical extension trials have assessed the drug's safety and efficacy over extended periods, some lasting up to 4 years. These studies document continued iron reduction and track the long-term adverse event profiles.

Q: Is it safe to consume alcohol while undergoing Asunra therapy?

Official guidance generally recommends avoiding alcohol while taking this medication.

Q: Can Asunra be taken by patients who have had stomach ulcers in the past?

Regulatory warnings state that the risk of severe stomach or bowel problems, such as ulcers or bleeding, is greater in people who have had these conditions previously. Patients are generally advised to inform their healthcare provider of any such history.

Q: Does Asunra cause generalized body pain or joint discomfort?

Official adverse reaction reports list joint pain (arthralgia) and back pain as common side effects of the medication.

Q: Can the medication cause fluctuations in blood pressure?

Regulatory documents indicate that the medication can cause changes in blood pressure. This includes both an increase in blood pressure and, as a sign of an allergic reaction, low blood pressure.

How should Asunra be stored and disposed of?

How to Store and Dispose of Asunra (Deferasirox)

Storage Requirements

Asunra tablets must be stored at controlled room temperature, specifically between 20 C and 25 C (68 F and 77 F), with storage temperatures not exceeding 30 C. The container must be kept tightly closed to protect the medication from moisture.

For child safety, the product must be kept out of the sight and reach of children.

Stability and Handling

If using the dispersible tablets, the prepared liquid suspension must be used immediately after mixing and cannot be stored for later administration, as this compromises product stability.

Disposal Instructions

Unused or expired medication must be handled as pharmaceutical waste. Deferasirox must not be disposed of via household waste or flushed down the toilet; disposal must follow specific local regulatory requirements for waste medicine.

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

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