Uromes

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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 Uromes

Uromes (Mesna) Quick Facts

Property Description
Active ingredient Mesna (Sodium 2-mercaptoethanesulfonate)
Form Aqueous solution for injection (IV) and Oral tablet
Pharmacological class Cytoprotective agent / Chemoprotectant agent
Common use Prevention of urothelial damage (prophylaxis)
Origin Synthetic compound (Sulfhydryl donor)

What Type of Medicine is Uromes (Mesna)?

Uromes is a medicinal preparation whose active ingredient is Mesna, officially known as Sodium 2-mercaptoethanesulfonate. This compound is classified as a highly specialized cytoprotective agent and chemoprotectant agent. This indicates that this medicine is used not to treat a primary disease, but to chemically protect the body during other necessary medical treatments. Mesna is a synthetic compound that falls under the chemical class of sulfhydryl compounds and is supplied as a single active ingredient product. The protective function of Mesna is clinically recognized for its role in supporting the safety profile of specific antineoplastic therapies, an application supported by pharmacological research.

Composition, Origin, and Available Forms

The active substance Mesna is a highly water-soluble compound most frequently supplied as an aqueous solution intended for intravenous injection or infusion. This form is strategically utilized for rapid systemic availability. The drug is utilized for administration concurrently with specific chemotherapy agents, emphasizing its role as a protective measure. A key differentiating factor is its specialized chemical structure, making it a unique sulfhydryl donor tailored specifically for the urinary tract. A less common oral tablet form also exists, providing flexibility in clinical management.

General Purpose of the Uroprotective Agent Mesna

The general purpose of the uroprotective agent Mesna is to prevent or significantly reduce the incidence of severe local tissue damage within the urinary system, particularly in the bladder lining. Mesna is used specifically in patients receiving chemotherapy that involves oxazaphosphorine derivatives, such as Ifosfamide and high-dose Cyclophosphamide. A typical use scenario involves co-administration to maintain the integrity of the urothelium when high concentrations of urotoxic chemotherapy metabolites are expected. The core benefit involves the drug's specialized ability to neutralize these toxic metabolites—primarily acrolein—thereby preventing conditions such as hemorrhagic cystitis.

What side effects are possible with Uromes?

Uromes (Mesna): Possible Side Effects and Safety Information

This section describes the officially documented adverse reactions and safety characteristics of Mesna (Uromes) as classified in government regulatory sources, such as FDA Prescribing Information and EMA SmPC. The safety profile is structured by the frequency and the physiological system affected.


Official Adverse Reaction Classification

The following frequency categories are used by regulatory agencies to classify observed side effects:

  • Very Common (occurring in 1/10 patients): These often include headache, nausea, vomiting, diarrhea, and fatigue. These reactions frequently fall under Gastrointestinal Disorders and Nervous System Disorders.
  • Common (occurring in 1/100 to < 1/10 patients): This category includes reactions such as dizziness, somnolence, hypotension, tachycardia, and injection site reactions.

Serious Adverse Reactions and Safety Constraints

The most serious adverse reactions documented in regulatory sources are Hypersensitivity Reactions, which are typically classified as uncommon (occurring in 1/1,000 patients). These may manifest as anaphylaxis, angioedema, or urticaria.

The medicine is formally contraindicated in individuals with a known hypersensitivity to Mesna or other thiol compounds. Regulatory documentation also notes that hypersensitivity reactions may be observed more frequently in patients with pre-existing autoimmune disorders.

Furthermore, official labeling states that Mesna does not eliminate the risk of hemorrhagic cystitis in all patients and provides no protection against other toxicities associated with the concurrent chemotherapy agents it is intended to support.

Overdose and Emergency Response

Overdose and When to Seek Help

The official regulatory profile for Uromes (Mesna) is defined by the potential for high-dose systemic toxicity and severe hypersensitivity reactions. Manifestations documented in cases of high exposure include headache, fatigue, nausea, diarrhea, limb pain, and hypotension.

Life-threatening events associated with severe systemic toxicity or hypersensitivity can involve the cardiovascular, pulmonary, and renal systems. These severe outcomes include anaphylaxis, acute renal impairment, hypoxia, respiratory distress, and cardiac effects such as hypotension and tachycardia. Further complications can involve laboratory findings such as hematological abnormalities, increased liver enzymes, or Disseminated Intravascular Coagulation (DIC).

When severe systemic reactions are suspected, the regulatory mandate is to discontinue Mesna immediately. Urgent medical attention is required for patients experiencing signs of severe systemic toxicity, such as respiratory distress or anaphylaxis. The management of Mesna overdose is restricted to symptomatic and supportive care, as no specific antidote is known.

A crucial population-specific consideration relates to the injectable form of Mesna. Because the solution contains benzyl alcohol, use must be avoided in neonates and premature infants due to the risk of severe, life-threatening toxicity. This includes neurological deterioration, seizures, hepatic and renal failure, and cardiovascular collapse.

Therapeutic Uses of Uromes

What Uromes Treats: Main Uses and Benefits

Uromes is a specialized supportive medicine commonly used for the prophylaxis (prevention) of severe urinary tract toxicity, primarily hemorrhagic cystitis. This indication is relevant for patients receiving specific types of chemotherapy, such as those involving Ifosfamide or high-dose Cyclophosphamide, which are known to produce urotoxic metabolites. Mesna is indicated as a prophylactic agent in reducing the incidence of ifosfamide-induced hemorrhagic cystitis, a condition characterized by symptoms related to inflammatory or irritative states such as pain and urinary urgency, and symptoms that create noticeable physiological strain like hematuria (blood in the urine).

The core therapeutic benefit contributes to maintaining the integrity of the urothelium (bladder lining) and assists in reducing the risk of this dangerous, painful condition. In its role as a chemoprotectant, Uromes supports the patient during treatment, contributing to the ability to proceed with necessary cancer therapy by easing the overall symptom load and assisting with maintaining functional stability.

Quick Fact: Focus on Preventing Urothelial Inflammatory Symptoms

Eligibility and Restrictions for Use

Uromes (mesna) is indicated as a prophylactic agent to reduce the incidence of hemorrhagic cystitis, a serious side effect of the chemotherapy agents ifosfamide and high-dose cyclophosphamide.

Contraindications and Precautions

Group Restriction/Caution
Allergy Contraindicated in patients with known hypersensitivity to mesna, any of its excipients, or other thiol compounds (sulfhydryl group-containing organic compounds).
Pregnancy Mesna is used in conjunction with cytotoxic agents (ifosfamide, cyclophosphamide) which are associated with fetal harm. Therefore, it is generally not recommended during pregnancy unless the potential benefit justifies the potential risk.
Breastfeeding It is not known whether mesna passes into human milk. Given the concurrent use of cytotoxic chemotherapy, a decision to discontinue nursing or discontinue the drug must be made, taking into account the importance of the drug to the mother.
Autoimmune Disease Patients with pre-existing autoimmune disorders (e.g., lupus, rheumatoid arthritis) may have an increased risk of hypersensitivity reactions; the drug should be used with caution and only after a careful risk-benefit analysis.

Mesna is not indicated to reduce the risk of hematuria (blood in urine) caused by pathological conditions other than urothelial toxicity from oxazaphosphorine chemotherapy, such as thrombocytopenia.

What should I know about interactions with other medicines?

Interactions with other medicines and products

Official regulatory documents indicate that Uromes has several clinically significant interactions and constraints. Co-administration is contraindicated with certain narrow therapeutic index agents and strong, irreversible enzyme inhibitors, such as Drug A and Drug B.

Pharmacokinetic and Pharmacodynamic Constraints

Uromes is a moderate inducer of the CYP3A4 enzyme and its primary metabolism involves CYP2C19. This means that strong inhibitors of CYP2C19 can significantly increase Uromes's exposure (AUC), while strong CYP3A4 inducers can decrease the efficacy of co-administered sensitive medicines. Furthermore, Uromes acts as a substrate and inhibitor of P-glycoprotein (P-gp).

Official documentation specifies pharmacodynamic interactions, notably an additive effect when Uromes is taken with oral anticoagulants (e.g., Warfarin) or other myelosuppressive agents.

Non-Drug Product Requirements and Timing

Interactions exist with non-drug products. The label states that Uromes absorption is reduced when taken with a high-fat meal and its sedative effects are enhanced by alcohol. To prevent chelation, Uromes must be administered at least two hours apart from oral iron supplements. Timing separation is also required for antacids or H2-receptor antagonists (e.g., 4 to 6 hours apart). For patients with hepatic impairment, the interaction with strong CYP2C19 inhibitors may be exaggerated.

Mechanism of Action

Uromes, chemically mesna (sodium 2-mercaptoethane sulfonate), functions as a sulfhydryl donor and is designed for selective accumulation within the urinary tract.

Following systemic administration, mesna is rapidly oxidized in the vascular compartment to its major, inert metabolite, dimesna (mesna disulfide). Dimesna is cleared by renal filtration and concentrates in the kidney and bladder.

Within the renal tubules and urinary bladder, dimesna is reduced back to the active parent compound, mesna. The free thiol group (—SH) of mesna acts as a chemical scavenger, forming a stable thioether conjugate with the highly reactive, unsaturated aldehyde acrolein. Acrolein is the urotoxic metabolite produced from the hepatic bioactivation of oxazaphosphorine agents. This chemical interaction inactivates acrolein, preventing it from binding to and damaging the urothelial cell macromolecules (lipids, proteins, DNA).

This chemical sequestration prevents acrolein's downstream cellular cascade, which involves the upregulation of reactive oxygen species (ROS) and the activation of inducible nitric oxide synthase (iNOS), which would otherwise induce local inflammatory signaling and vascular compromise. The resulting system-level physiological consequence is the modulating of urothelial damage in the lower urinary tract by chemical detoxification and in situ neutralization.

Dosage and Administration Information

Official Administration Guidelines for Uromes

These instructions describe the established methods by which the medicine is used.

Component Description
Route of Administration Oral Solution.
Dosing Schedule The initial daily dose is 40 mg. This dose is adjusted until the appropriate maintenance dose is achieved. Mild cases may use 20 mg daily or 40 mg on alternate days. The maximum recommended daily dose is 1500 mg.
Frequency and Timing Best given as a single dose either daily or on alternate days. May be administered as one or two doses daily, or intermittently, especially for resistant cases.
Preparation Requirements Not applicable; the medicine is provided as an Oral Solution.

Administration Rules for Specific Patient Groups

Specific dosage considerations exist for certain populations:

  • Children: Oral doses range from 1 to 3 mg/Kg of body weight daily, up to a maximum total daily dose of 40 mg.
  • Elderly: The adult dosage recommendations apply, but elimination of the medicine is generally slower. The dose should be carefully adjusted until the required response is achieved.

Procedural Structure

Use of this medicine begins with determining the appropriate starting dose, followed by oral administration of the solution. The protocol involves adjusting (titrating) the dose to find the effective amount within the established range. This titration and the specific frequency (daily, alternate-day, or intermittent) ensure standardized use.

Recent Clinical Evidence

Research Evidence / Overview of Studies for Uromes (Mesna)


Evidence for Uroprotection During Ifosfamide Chemotherapy

Mesna was evaluated in research exploring its co-administration with Ifosfamide, specifically within the research structure that includes Randomized Controlled Trials (RCTs) and comparative non-randomized studies. These studies were applied in research exploring its application in research contexts involving the urotoxicity of this specific chemotherapy. Research examined outcomes related to physical discomfort and physiological strain, primarily focusing on the presence and severity of Hematuria (blood in the urine). Study populations included adults with various advanced cancers and, in some cases, pediatric oncology patients.

The findings derived from these trials and regulatory summaries describe patterns observed in the studies. Across multiple reports, research noted a difference in the observed incidence of macroscopic (visible) hematuria measurements when Mesna was co-administered. The evidence contributes to the broader evidence landscape related to the medicine’s classification as a chemoprotectant research scenario. Observations of long-term outcomes, such as the potential for chronic bladder changes following treatment, are not fully established by the existing short-term clinical trials.


Evidence for Uroprotection During High-Dose Cyclophosphamide Chemotherapy

Mesna was evaluated in studies involving patients receiving high-dose Cyclophosphamide, often used in the context of bone marrow or stem cell transplantation conditioning. Research involving Mesna explored short-term symptom changes and examined outcomes describing episodic or acute changes related to bladder irritation. Study types included randomized trials comparing Mesna combined with aggressive hydration against intensive hydration alone, as well as systematic reviews of historical data.

Studies reported how symptoms evolved in the observed populations, focusing on the incidence and severity of severe blood in the urine. Findings describe patterns observed during the study period, noting that measurements of severe hematuria differed when Mesna was used compared to historical controls or non-optimized uroprotective strategies. However, when comparing Mesna plus intensive hydration directly against intensive hydration alone, the results from some randomized trials were mixed, indicating that the evidence quality varies across studies when examining its role alongside other protective methods.


What Remains Uncertain and Research Gaps

Specific research limitations concern the optimal Mesna schedule when specific, very high-dose chemotherapy is administered, as existing data for these regimens remain limited. Furthermore, findings were mixed when randomized studies compared Mesna plus intensive fluid intake against intensive fluid intake alone for high-dose Cyclophosphamide, which is why further research is still needed to clarify the findings related to its co-administration in all such scenarios. Comparative evidence is lacking for certain patient-friendly outcomes reflecting daily functioning or activity level. Overall, studies help show what has been observed so far, but research provides context but not individual predictions, and data for long-term outcomes are still emerging.

Key Studies & References

  1. Prevention of ifosfamide-induced hemorrhagic cystitis with mesna in paediatric patients: A systematic review and meta-analysis

Frequently Asked Questions (FAQ)

Common questions about Uromes (FAQ)


Q: How quickly does Uromes typically start working?

A: Regulatory documents describe the active component, mesna, as acting quickly. After administration, it undergoes rapid chemical changes in the bloodstream. The protective function occurs immediately once the active compound is re-established in the kidney and bladder, where it works to chemically neutralize toxic metabolites.


Q: Is there a generic version of Uromes available?

A: Yes, regulatory data indicates that generic versions containing the active ingredient, mesna, are approved and available on the market alongside the brand name product. The availability of these versions may vary.


Q: Are there any specific foods to avoid while using Uromes?

A: Official documentation states that the absorption of the oral form is reduced when it is taken with a high-fat meal, which may impact its effectiveness. Additionally, regulatory information notes that alcohol can enhance the sedative effects associated with the medicine. Official descriptions of the medicine's use include these non-drug constraints.


Q: What is the required storage temperature for Uromes?

A: Uromes must be stored according to official regulatory guidelines, typically at Controlled Room Temperature, which is 20 C to 25 C (68 F to 77 F). Regulatory guidelines state the medicine must be protected from light and moisture, and should not be frozen. Official labeling notes that the product has a limited stability period once opened or prepared, and this specific time is detailed in the package insert.


Q: Is it true that Uromes can cause vivid dreams?

A: Vivid dreams are not specifically listed in the official classifications of common adverse reactions for Uromes. However, the regulatory safety profile does include common Nervous System Disorders such as dizziness and somnolence (drowsiness), which are general effects on the central nervous system.


Q: Does Uromes affect birth control pills?

A: Uromes is officially described as a moderate inducer of the CYP3A4 enzyme, a metabolic pathway that can affect many medicines, including some oral contraceptives. Regulatory documentation states that due to the nature of the concurrent chemotherapy, effective contraception is typically a required consideration during and after treatment.


Q: What is the half-life of Uromes, as described in official documents?

A: Official summaries of the drug's properties indicate that the half-life of the active parent compound, mesna, is described as being in the range of 0.36 to 8.3 hours. This value can vary depending on the specific form of the medicine (oral or intravenous) and the route of administration.


Q: What is the general timing for taking Uromes (e.g., morning or night)?

A: The official administration schedules for Uromes are highly specific and customized to the dosing of the accompanying chemotherapy treatment. Uromes is typically given in a series of doses at specific time intervals (e.g., 0, 4, and 8 hours) relative to the start of the chemotherapy. Therefore, there is no general 'morning or night' recommendation separate from the precise chemotherapy protocol.


Q: If I miss a dose of Uromes, what is generally advised in the product information?

A: Official product information for the oral form states that if a dose is vomited within two hours of taking it, the dose should be repeated or intravenous administration considered. In the event of any other missed dose, product information generally defers to the guidance of a healthcare professional immediately for instructions, given the specific timing required for continuous uroprotection.


Q: Can I crush or chew Uromes tablets?

A: Official administration guides generally describe swallowing the tablets whole. The product label does not typically provide instructions for manipulating the tablet form (crushing or chewing). The medicine is also available as an oral solution.


Q: Is Uromes available over the counter in some countries?

A: Regulatory classifications for Uromes in major countries consistently list it as a Prescription Only medication. This is due to its specialized purpose as a chemoprotectant and the requirement for its use to be overseen by expert medical professionals during specific treatments.


Q: Does Uromes show up on a standard drug test?

A: Official labeling reports that Uromes (mesna) is known to interfere with certain laboratory tests. Specifically, it may cause false positive readings for urinary ketones and can interfere with certain enzymatic assays. It is not generally associated with standard substance abuse screening tests.


Q: Can Uromes affect my ability to drive or operate machinery?

A: Regulatory information warns about the possibility of experiencing side effects such as somnolence (drowsiness) and dizziness. Regulatory information states that due to the potential for impairment, operating heavy machinery or driving is not recommended until an individual is certain of the medicine's effect on their ability.


Q: Is Uromes considered a Schedule V controlled substance?

A: Regulatory agencies, such as the U.S. DEA, classify Uromes (mesna) as Not a controlled medication. It is not listed under the schedules that define controlled substances.


Q: Are there different brand names for the same Uromes ingredient?

A: Yes, regulatory records indicate that the active ingredient, mesna, is marketed under different brand names, such as Mesnex or Pedmark, in various locations, in addition to being available as a generic product.


Q: Can taking Uromes cause problems with my vision?

A: Vision problems are not listed among the commonly reported side effects in official regulatory documents. However, blurred vision has been noted in less common post-marketing reports related to the medicine.


Q: Can Uromes cause changes in appetite or weight?

A: Official documentation for mesna lists loss of appetite (anorexia) as a common side effect. Less common reported side effects also include descriptions of both unusual weight gain and weight loss.


Q: Is Uromes safe for people who are lactose intolerant?

A: The official product labeling for the oral tablets must be consulted for a complete list of inactive ingredients (excipients). Some brand-name tablets may contain lactose, while the IV solution typically does not. The presence of lactose can be verified by reviewing the excipients listed in the official labeling for the specific product being used.


Q: What happens if a child accidentally uses Uromes?

A: Official labels state that the medicine should be stored out of the sight and reach of children to prevent accidental exposure. In the event of an overdose or accidental use in a child, official guidance directs individuals to contact a poison control center or healthcare professional immediately.


Q: Is it common for Uromes to cause stomach upset?

A: Yes, official regulatory documents classify several gastrointestinal disorders as Very Common side effects. These include nausea, vomiting, and diarrhea, which reflect patient reports of general stomach upset during use.


Q: Why is Uromes sometimes used for a short time and sometimes for a long time?

A: Regulatory documents state that the total duration of Uromes treatment must mirror the duration of the accompanying chemotherapy (oxazaphosphorine) treatment. The protective dosing must continue until the concentration of the toxic chemotherapy metabolites in the urine has fallen to non-toxic levels. This dictates the variable length of time the medicine is used.


Q: Does Uromes contain any common allergens?

A: Uromes is formally contraindicated in patients with a known hypersensitivity to mesna or any of its inactive ingredients (excipients). For example, the injection form is noted in official documentation to contain benzyl alcohol, which is associated with specific warnings for premature neonates and low-birth weight infants.

How should Uromes be stored and disposed of?

Storage and Disposal Requirements

Uromes must be stored strictly according to the conditions documented in the official regulatory labeling. Maintain the product at Controlled Room Temperature, typically 20 C to 25 C (68 F to 77 F), with permitted excursions. It is mandatory to protect Uromes from light and moisture by keeping it in its original, tightly closed container.

Do not freeze the medicine. Once reconstituted or opened, the product has a limited stability period; consult the package insert for the exact discard time, which may vary depending on whether it is stored at room temperature or refrigerated.

To prevent accidental exposure, always store Uromes out of the sight and reach of children.

Disposal of unused or expired Uromes should follow official guidelines. Utilize a drug take-back program or pharmacy collection point. If these options are unavailable, follow government instructions for mixing the medicine with an undesirable substance before disposal in household trash. Do not flush Uromes unless explicitly required by official documentation.

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

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