Alltrex

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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 Alltrex

Property Description
Active ingredient Methotrexate
Forms Tablets (oral) and Solution for injection (parenteral)
Pharmacological class Antimetabolite, DMARD, Immunosuppressant
General purpose Disease modification (immune control or cell growth inhibition)
Origin Synthetic chemical compound

Alltrex is a systemic prescription medicine whose active component is Methotrexate, which is fundamentally classified as an antimetabolite, a potent Disease-Modifying Anti-Rheumatic Drug (DMARD), and an immunosuppressant. This medicine is a high-potency agent used to control severe, chronic, and life-altering conditions, with its efficacy clinically recognized for controlling systemic diseases where high levels of immune activity or cell division are present.


What Type of Medicine is Alltrex (Methotrexate)?

Alltrex belongs to the antimetabolite class, meaning it is a synthetic chemical compound designed to interfere with certain cellular processes by acting as a folic acid antagonist. This pharmacological classification signifies that the drug is distinct from conventional symptom-relievers, as its purpose is to modify the progression of disease pathology by regulating immune function and controlling cell proliferation. This capacity involves its inhibition of the dihydrofolate reductase enzyme, a key step in controlling immune responses and abnormal cell division.


Alltrex Composition and Available Forms

The core of Alltrex is the single active ingredient, Methotrexate, a Glutamic acid analog that is manufactured into two primary systemic formats for patient use. The medicine is available as solid tablets intended for oral administration and as a sterile solution for injection for parenteral administration. The availability of both oral and injectable forms ensures reliable systemic administration and allows clinicians to tailor the delivery method based on the patient's specific needs. Methotrexate's primary action involves competitively inhibiting dihydrofolate reductase.


What is the General Therapeutic Purpose of Alltrex?

The general therapeutic purpose of Alltrex is to achieve profound disease modification by controlling two central biological issues: uncontrolled cell proliferation and excessive immune activity. For instance, in conditions characterized by severe inflammation, its capacity for immune modulation works to dampen the chronic inflammation and severe tissue damage caused by an overactive or misdirected immune response. This systemic effect aims to manage the underlying cause of the disease rather than merely addressing symptoms.

What side effects are possible with Alltrex?

Possible Side Effects and Safety Information

Methotrexate (Alltrex) is a high-potency systemic medicine, and its official regulatory labeling details a range of potential adverse effects and serious safety concerns across multiple body systems.


Official Adverse Reactions and Frequency

Adverse reactions are classified by frequency based on data from regulatory sources (e.g., FDA, EMA SmPC). The organ systems affected include the blood, gastrointestinal system, liver, lungs, and skin. Frequencies may vary, but the following are documented:

  • Very Common (Affecting ge 1 in 10 patients): Elevated liver enzymes (transaminases).
  • Common (Affecting ge 1 in 100 patients): Leukopenia (low white blood cell count), Ulcerative stomatitis (mouth sores), Nausea, Abdominal distress, Diarrhea, Alopecia (hair loss), and Rash.

Serious Adverse Reactions

Regulatory agencies emphasize that this medicine is associated with risks that can be serious or potentially fatal. These mandatory warnings highlight major areas for monitoring:

  • Organ Toxicity: Risks include severe Hepatotoxicity (liver damage, possibly leading to fibrosis/cirrhosis with long-term use) and Pulmonary Toxicity (lung damage, e.g., interstitial pneumonitis).
  • Hematologic Toxicity: Severe Myelosuppression (bone marrow suppression) leading to critically low blood cell counts.
  • Fetal Risk: The drug is strictly contraindicated in pregnancy for non-neoplastic diseases due to the risk of Embryo-Fetal Toxicity.
  • Infections and Malignancy: Increased risk of serious infections and documented risk of malignant lymphomas.

Safety Restrictions and Considerations

Official labeling contains specific constraints related to safety:

  • Contraindications: Use is explicitly forbidden in patients with severe renal impairment, significant pre-existing liver disease, or a history of severe hypersensitivity.
  • Prohibitions: Concurrent alcohol consumption is strictly prohibited due to the enhanced risk of severe liver damage.
  • Dosing Risk: Regulatory warnings stress that accidental daily dosing, rather than the intended once-weekly schedule for certain indications, has resulted in fatal toxicity.

Overdose and Emergency Response

Overdose and When to Seek Help

Overdose Profile (Based on Regulatory Documents)

Classification Detail (As defined by official sources)
Acute Toxicity Generally considered well-tolerated in cases of Naltrexone-only overdose, even at doses significantly exceeding therapeutic levels. Acute symptoms are often limited to mild gastrointestinal irritation (e.g., vomiting).
Chronic High-Dose Risk Unsupervised use or high-dose regimens (e.g., above 50 mg daily) carry an increased risk of hepatocellular injury (drug-associated hepatitis).

Required Emergency Actions and Monitoring

When to Seek Immediate Medical Help

While acute overdose of Alltrex itself is not typically severe, immediate emergency medical attention is required for any patient who has used opioids and exhibits signs of profound sedation, respiratory depression, coma, or death. This life-threatening scenario can occur if an individual attempts to override the opioid-blocking effects of the medication.

Important Monitoring

Patients taking high-dose regimens should be advised to report non-specific abdominal complaints (such as pain or discomfort) to their healthcare provider immediately. This is necessary for timely evaluation and monitoring of potential drug-associated hepatitis. Management of an Naltrexone-only overdose is primarily supportive, with no specific antidote described in official documents.

Therapeutic Uses of Alltrex

What Alltrex Treats: Main Uses and Benefits

Alltrex is a medication commonly used across conditions presenting with acute episodes where symptoms of increased neurological or muscular activity create noticeable functional strain. The primary therapeutic domain of this medication involves supportive relief for two main areas.

First, Alltrex is applied in clinical settings that involve acute or unstable symptom patterns related to certain types of seizures. In this context, it helps address symptom clusters that may become intense or disruptive and is relevant when supportive symptom management is appropriate. Secondly, the medication is relevant for easing chronic symptoms related to physical discomfort caused by nerve damage. Specifically, it is commonly used to help with postherpetic neuralgia and is considered relevant in conditions where functional stability becomes affected, such as restless legs syndrome. This symptomatic support supports the patient during difficult episodes by easing distress.

Quick Fact: Relief for symptoms related to physical discomfort.

The benefit of this medication is that it may help patients cope more steadily with symptom fluctuations. As a patient-oriented benefit, this supportive treatment provides relief when symptoms interfere with routine activities.

“This medication assists with maintaining functional stability and contributes to easing the overall symptom load during periods of heightened discomfort.”

Regulatory References

  1. NIH MedlinePlus overview of the drug's uses

Eligibility and Restrictions for Use

Who Can and Cannot Use Alltrex? — Official Regulatory Information

The eligibility profile for Alltrex is strictly defined by regulatory authorities and centers on a patient’s age, specific genetic status, and overall liver function. This information determines who may be prescribed the medicine and who must not use it.

Eligibility Criteria

Use of Alltrex is allowed only for patients aged 6 years and older who have been confirmed to possess at least one responsive mutation in the Cystic Fibrosis Transmembrane Conductance Regulator (CFTR) gene, such as the F508del mutation. Safety and effectiveness have not been established in children younger than 6 years of age.

Restrictions and Contraindications

Alltrex is contraindicated (must not be used) in individuals who have a known hypersensitivity to the active substance or any other component of the medicine. It is also contraindicated in patients with severe hepatic impairment (Child-Pugh Class C) due to the risk of increased exposure. Use is not recommended in patients with moderate hepatic impairment (Child-Pugh Class B) unless a clear medical benefit is determined to outweigh the potential risks. Regulatory labeling also recommends against the concurrent use of strong or moderate CYP3A inducers.

What should I know about interactions with other medicines?

Interactions with other medicines and products

This section outlines interactions with other substances that are officially documented in government regulatory sources, based on Methotrexate's known pharmacokinetic and pharmacodynamic profile.


Formally Documented Contraindications and Restrictions

Co-administration of Nonsteroidal Anti-inflammatory Drugs (NSAIDs) is officially contraindicated when Alltrex (Methotrexate) is administered at high-dose regimens (e.g., in oncology) due to a substantial risk of severe, sometimes fatal, toxicity. Similarly, Live Vaccines are generally contraindicated because of the drug's immunosuppressive effects. Official regulatory labeling advises avoidance or severe limitation of Alcohol (Ethanol) consumption due to an officially documented additive risk of hepatotoxicity.


Pharmacokinetic and Pharmacodynamic Interactions

Alltrex's elimination can be affected by co-administered medicines. Proton Pump Inhibitors (PPIs) (e.g., Omeprazole) and certain antibiotics like Penicillins and Sulfonamides may officially reduce the renal clearance of Methotrexate, which can lead to elevated and prolonged plasma concentrations. This interaction is noted as being more severe in patients with impaired renal function.

Pharmacodynamic constraints include additive toxicity. Co-administration with other hepatotoxic agents or hematotoxic agents increases the official risk of severe liver damage or bone marrow suppression, respectively. Conversely, Folic Acid/Folinic Acid is formally documented to reduce Methotrexate toxicities.

Mechanism of Action

How Alltrex Works

Alltrex (Methotrexate) exerts its physiological effects through two distinct, coordinated biological mechanisms that modulate cellular processes and inflammatory signaling.

Molecular Antifolate Action and Cell Growth Control

The primary action involves the drug functioning as a structural analog to folic acid, leading to the competitive inhibition of the enzyme Dihydrofolate Reductase (DHFR). By disrupting this necessary step in the folate pathway, the drug limits the production of precursors required for DNA and RNA synthesis. This mechanism impacts rapidly dividing immune cells, primarily resulting in the suppression of lymphocyte proliferation and activation.

️ Adenosine-Mediated Anti-Inflammatory Signaling

The anti-inflammatory mechanism is initiated when Methotrexate metabolites inhibit the enzyme ATIC, which leads to the accumulation and release of extracellular adenosine. This adenosine then acts as an indirect agonist on A2A and A3 receptors on inflammatory cells. This receptor activation results in the modulation of cellular function and the suppression of key inflammatory mediators, including TNF-alpha and IL-6, leading to systemic physiological modulation. The full effect requires the slow, progressive accumulation of metabolites, resulting in an inherent pharmacodynamic lag before complete pathway engagement occurs.

Dosage and Administration Information

How to Use Alltrex (Methotrexate) Official Administration Guidelines

Alltrex is administered via several officially approved routes, including oral tablets, intramuscular (IM), subcutaneous (SC), intravenous (IV) injection, and intrathecal (IT) injection. The choice of administration route depends strictly on the specific indication being addressed and the required dosage.


Dosing Schedule and Frequency

The usage of Alltrex follows a highly specific schedule that must be adhered to precisely.

Indication Group Standard Dosing Pattern Key Frequency Constraint
Non-Oncologic (RA, Psoriasis) Typically 7.5 mg to 25 mg weekly Once Weekly Only
Oncologic (High-Dose) Highly variable, often 12 g/m^2 per course Daily or Cyclic Dosing

For chronic conditions like Rheumatoid Arthritis, the medication is mandated for use only once weekly. This weekly dose can be taken as a single administration or split into three smaller doses taken twelve hours apart, once per week. In contrast, oncologic uses, such as in the treatment of Acute Lymphoblastic Leukemia, utilize cyclic or daily regimens, sometimes at very high doses.


Administration Requirements

High-dose intravenous use, such as for Osteosarcoma, requires mandatory supportive measures, including aggressive hydration and urine alkalinization to prevent crystallization in the kidneys, as well as the administration of Leucovorin rescue post-infusion. Furthermore, only the preservative-free solution formulation is approved for sensitive routes, such as Intrathecal and high-dose IV administration. Dosage adjustments are officially required in patients with impaired renal function.

Recent Clinical Evidence

Research Evidence / Overview of studies for Alltrex

This section outlines the types of clinical studies and research that have examined Alltrex (Methotrexate), describing what researchers monitored, which patient populations were included, and what patterns were observed in the findings. The information is derived from official regulatory and scientific literature and does not offer any personal advice or clinical recommendations.


Evidence for use in Rheumatoid Arthritis (RA)

The research base consists of many studies over several decades. The evidence includes numerous large-scale, controlled studies, such as Randomized Controlled Trials (RCTs), and very long-term observational cohort studies. Researchers monitored complex metrics of disease activity (disease activity scores), measures of the patient's ability to perform daily activities (functional status), and X-rays to look for changes in joint damage progression.

Research provides insight into short-term changes measured during the study period. What remains uncertain is why a significant number of patients may not achieve the lowest possible level of disease activity when using this medicine alone.


Evidence for use in Psoriasis

Research exploring the use of Alltrex for severe Psoriasis includes a mix of RCTs, comparative studies, and long-term real-world observational studies. These studies monitored outcomes related to skin clearance, primarily using a standardized scale called the Psoriasis Area and Severity Index (PASI). Research highlights changes measured during the study period, although the evidence is limited by a sparse volume of modern, high-quality reviews compared to newer therapies.


Research for Specific Patient Groups and Evidence Gaps

Studies have been evaluated in various groups, including specific research focusing on pediatric patients with Juvenile Idiopathic Arthritis (JIA). Data for certain groups remain insufficient regarding long-term follow-up for JIA. The evidence is limited regarding the full context of drug interactions and their impact on patient outcomes in daily practice.

Key Studies & References

  1. Methotrexate in Moderate to Severe Psoriasis: Review of the Literature and Expert Recommendations
  2. Treatment of Children with Acute Lymphocytic Leukemia (ALL)

Frequently Asked Questions (FAQ)

Common questions about Alltrex (FAQ)

Q: What is the main approved use of Alltrex?

A: Alltrex is approved by regulators for the management of chronic, moderate-to-severe pain in adults when an opioid analgesic is needed for an extended period of time.


Q: How does Alltrex work in the body?

A: Alltrex acts on certain receptors within the central nervous system, which is believed to interfere with how the body perceives pain signals.


Q: Is Alltrex available as a generic drug?

A: Yes, the active ingredient in Alltrex is available in generic versions, subject to local regulations and patent expiration timelines.


Q: What should people know about the risk of dependence with Alltrex?

A: As with all medications in this class, there is a risk of developing physical dependence and addiction, even when the medication is used exactly as prescribed by a healthcare provider. Discussing this risk with a healthcare provider is important for proper management.


Q: Can Alltrex be used to treat sudden or short-term pain?

A: No. Alltrex is formulated as an extended-release medication and is specifically indicated for the around-the-clock treatment of pain that is expected to last for a long period of time. It is not intended for use as needed or for pain that is sudden or mild.

How should Alltrex be stored and disposed of?

Alltrex (Methotrexate) must be stored and disposed of according to strict regulatory mandates, reflecting its classification as a hazardous and cytotoxic drug.

Official Storage and Handling

Requirement Rule Constraint
Temperature Store at 20 C to 25 C (Controlled Room Temperature), with excursions up to 30 C. Keep from freezing and store away from excessive heat.
Protection The medicine must be protected from light and moisture. Keep the product in its original, closed container.
Stability Multiple-dose injection vials must be refrigerated (2 C to 8 C) after first use and discarded after 30 days. Single-dose vials must be discarded immediately after use.
Child Safety Keep out of the sight and reach of children and pets at all times. Mandatory requirement documented on the label.

Official Disposal Rules

Alltrex is a hazardous drug requiring special handling and disposal. Unused or expired medication must not be thrown in the household trash or poured down any drain or sink. Used injection supplies (needles, syringes, and vials) must be placed in a designated puncture-resistant sharps container and handled as cytotoxic waste for proper collection and incineration, following federal, state, and local guidelines.

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

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