Dalex

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Dalex

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Medically reviewed

Marina Burgos

Last updated on 10/01/2026

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 Dalex

Quick Facts

Property Description
Active Ingredient Epirizole
Form Tablet or Capsule (Oral)
Pharmacological Class Nonsteroidal Anti-inflammatory Drug (NSAID)
General Purpose Analgesic and Anti-inflammatory
Origin Synthetic

What Type of Medicine is Dalex (Epirizole)?

Dalex is a specific pharmaceutical preparation whose single active ingredient is the synthetic compound Epirizole. It is definitively classified as a Nonsteroidal Anti-inflammatory Drug (NSAID), a primary class of medication clinically recognized for its ability to reduce pain, fever, and inflammation.

Epirizole is identified by its specific molecular framework as a pyrimidinyl pyrazole derivative. This structure distinguishes it from the acetic or propionic acid NSAIDs, positioning it as a distinct non-narcotic analgesic agent. Its profile as an analgesic and anti-inflammatory agent is widely supported by pharmacological studies, confirming its intended use in managing inflammatory-related discomfort.

Composition and Physical Form of Dalex

The function of Dalex relies solely on the action of Epirizole, the single active substance contained within the medication. Being a synthetic small molecule, its primary design is for oral administration, facilitating its absorption through the digestive system to achieve a comprehensive systemic effect.

The medication is supplied in solid dosage forms, typically either a tablet or a capsule. This formulation style, utilizing standard pharmaceutical excipients, ensures optimal systemic distribution, necessary to address widespread or deep-seated inflammatory pain, as opposed to localized topical treatments.

General Purpose and High-Level Action

The general purpose of Dalex is to provide symptomatic relief from discomfort and the physical signs associated with inflammation. It achieves this by modulating key biochemical pathways.

The high-level action involves Epirizole inhibiting the cyclooxygenase (COX) enzyme system. This enzyme is pivotal in the body’s synthesis of prostaglandins, the powerful chemical compounds that mediate pain, swelling, and fever. By dampening the production of these inflammatory mediators, the medicine exerts its core therapeutic effects of analgesia (pain relief) and an anti-inflammatory response.

Regulatory References

  1. NSAIDs: Uses, Mechanism, and Side Effects

What side effects are possible with Dalex?

The safety profile of Dalex (Epirizole) is defined by its classification as an oral Nonsteroidal Anti-inflammatory Drug (NSAID), with risks formally documented by government regulatory agencies.

Adverse Reaction Scope

Category Regulatory Description
Frequency Common adverse reactions often include gastrointestinal discomfort (e.g., nausea, dyspepsia, stomach pain) and headache; however, all effects are categorized by frequency tiers as established in regulatory documents.
System-Organ Classes Adverse reactions are officially grouped into systems, primarily affecting the Gastrointestinal, Cardiovascular, Renal/Urinary, Hepato-biliary, and Nervous Systems.
Serious Adverse Reactions (SARs) Regulatory labeling highlights the risk of Cardiovascular Thrombotic Events (including Myocardial Infarction and Stroke) and severe Gastrointestinal Bleeding, Ulceration, and Perforation as serious adverse reactions. The potential for severe Renal and Hepatic Toxicity is also documented.

Safety Classifications (High-Level)

Classification Aspect Regulatory Description
Exposure-Related Patterns Official documents state that the risk of serious cardiovascular and gastrointestinal events may occur early in treatment and increase with longer-term use (duration-dependent risk).
Population-Specific Concerns Older Adults are officially noted as being at greater risk for serious adverse events, particularly severe gastrointestinal complications. Late-stage pregnancy use is cautioned against due to fetal risk, and use is generally restricted in individuals with severe renal or hepatic impairment.
Safety Restrictions The medicine is generally contraindicated in patients with active GI bleeding, a history of hypersensitivity to NSAIDs, or following coronary artery bypass graft (CABG) surgery.

Connection to the Overall Safety Profile

This structured regulatory information establishes the spectrum of documented reactions based on system classification and frequency. The emphasis on serious adverse reactions and dynamic risks tied to exposure length and patient factors formally defines the boundaries of the medicine's known safety characteristics.

Overdose and Emergency Response

Dalex (Paracetamol/Acetaminophen) overdose can be extremely serious, potentially leading to severe liver damage and failure, which may not present with clear symptoms immediately. Symptoms can often be delayed by 24 to 72 hours, making immediate medical attention critical even if the individual initially feels well.

Overdose Symptoms

Initial signs, which may be mild or absent, can include:

  • Nausea and vomiting
  • Abdominal pain (particularly in the upper right side)
  • Loss of appetite
  • Excessive sweating
  • General feeling of being unwell (malaise)

Delayed, more severe symptoms occurring 2 to 4 days later indicate liver damage and can include yellowing of the skin or eyes (jaundice), confusion, and easy bruising or bleeding.

When to Seek Help

Always seek emergency medical assistance immediately if you suspect that a person has taken more than the recommended dose of Dalex, regardless of whether symptoms are present. Do not wait for signs of illness to appear.

Situation Action Required
Suspected overdose (even if asymptomatic) Call your local emergency number or Poison Control Center immediately.
Severe or late-stage symptoms (Jaundice, confusion, severe pain, no urine for hours) Call your local emergency number (e.g., 911) immediately.

Bring the medication container with you to the hospital, if possible. Treatment for Dalex overdose, which often involves the antidote acetylcysteine, is most effective when administered within eight hours of ingestion.

Therapeutic Uses of Dalex

What Dalex Treats: Main Uses and Benefits

Dalex is commonly used to help manage symptoms related to physical discomfort and inflammatory or irritative states. This includes addressing symptoms associated with acute or episodic changes, which is a common therapeutic domain for its class. The medication is applicable within clinical settings that involve acute or unstable symptom patterns, such as temporary flare-ups of chronic conditions.

The medication is relevant for easing symptoms associated with various inflammatory processes, including those related to arthritis and musculoskeletal issues.

Easing Chronic Inflammatory Joint Discomfort

This block addresses the use of Dalex in conditions characterized by periods of heightened symptoms where symptoms related to inflammatory or irritative states are central. Dalex is commonly used across conditions presenting with acute episodes, and is relevant in conditions such as Rheumatoid Arthritis, Ankylosing Spondylitis, and Psoriatic Arthritis, where it may assist with managing symptoms related to physical discomfort and joint stiffness. Provides support that helps ease the overall symptom burden.

Supportive Relief for Musculoskeletal Pain and Systemic Symptoms

Dalex is applied in contexts where additional symptomatic support is needed in the musculoskeletal domain, which includes addressing the acute pain and swelling that often accompany soft tissue injuries like sprains, as well as the chronic, disruptive symptom manifestations of Osteoarthritis. Additionally, it is relevant for easing symptoms related to systemic imbalance, and may assist in managing fever (pyrexia). This systemic support provides symptomatic assistance, which may help ease the overall symptom burden during episodes of heightened discomfort and assists with maintaining functional stability.

Quick Fact: Relief for Inflammatory Discomfort
Used to Address: Symptoms related to physical discomfort, swelling, stiffness, and fever
Therapeutic Scope: Conditions involving inflammatory processes, chronic arthritis, acute soft tissue injuries
Key Benefit: Assists with maintaining functional stability

Regulatory References

  1. NIH StatPearls on Nonsteroidal Anti-Inflammatory Drugs

Eligibility and Restrictions for Use

Official Eligibility and Contraindications for Dalex

Regulatory documents strictly define which patient populations are eligible to receive Dalex. Eligibility is determined by specific age criteria, pre-existing health conditions, and physiological states.

Absolute Contraindications (Must Not Use)

Contraindicated Group Regulatory Basis
Patients with Hypersensitivity Known allergy to Dalex or its components.
Patients with Hepatic Disease Significant hepatic dysfunction or pre-existing liver disease.
Patients with Urea Cycle Disorders A diagnosed or suspected metabolic disorder.
Pregnant Women Contraindicated due to documented fetal harm risk (teratogenicity).

Age and Condition-Specific Restrictions

  • Children Under Two Years: Use is highly restricted and often contraindicated, particularly in the presence of suspected or known genetic mitochondrial disorders, due to an increased risk of fatal hepatotoxicity.
  • Pediatric Patients: For certain uses, safety and effectiveness have not been established in children.
  • Women of Childbearing Potential: Must use effective contraception and receive counseling on the high risk of fetal harm (including neural tube defects) if Dalex is used during pregnancy.
  • Older Adults (Geriatric): Use is permitted, but the drug must be administered with caution and close monitoring due to an increased risk of somnolence and central nervous system (CNS) adverse effects.
  • Renal and Hepatic Impairment: Patients with hepatic impairment are generally contraindicated; those with renal impairment may require special consideration or monitoring as defined in the official prescribing information.

What should I know about interactions with other medicines?

Interactions with other medicines and products

Dalex (Epirizole) is an NSAID, and its interaction profile is structured around minimizing cumulative risks and addressing altered therapeutic effects when co-administered with specific medicinal product classes. All interaction patterns described here are based exclusively on authoritative government regulatory documentation.

Interaction Classifications and Restrictions

Co-administration with other substances is subject to specific constraints. There is a regulatory restriction against taking Dalex concurrently with other NSAID-containing medicines, including analgesic doses of Aspirin, due to a documented additive risk of adverse gastrointestinal effects. The interaction with Anticoagulants (blood-thinning medicines) is officially noted for carrying an increased risk of bleeding and hemorrhage, as is the co-administration with Corticosteroids.

Efficacy and Exposure Modification

Regulatory documents describe pharmacodynamic interactions where Dalex may diminish the intended therapeutic effects of Antihypertensives (such as ACE Inhibitors and ARBs) and Diuretics. Regarding exposure modification, Dalex co-administration may officially increase the serum concentration of Lithium. Furthermore, the intake of Alcohol is noted to exacerbate the risk of gastrointestinal bleeding.

Population-Specific Notes

A population-specific constraint exists for the interaction with ACE Inhibitors and ARBs, where the risk of renal function deterioration is officially highlighted as being greater in the Elderly, those who are Volume Depleted, or patients with pre-existing Renal Impairment. The overall regulatory definition of the product’s interaction profile emphasizes these key areas of risk.

Mechanism of Action

Epirizole exerts its actions by interfering with specific enzyme activity and cellular mechanics, influencing key physiological signaling pathways.

Modulating the Cyclooxygenase Cascade

Epirizole exerts its primary mechanism by acting as an inhibitor of the Cyclooxygenase (COX) enzyme system, with a partial preference for the inducible COX-2 isoform. This enzyme inhibition restricts the conversion of arachidonic acid into prostaglandins (such as PGE2). This mechanistic domain results in a physiological consequence: the reduced sensitization of peripheral sensory receptors and decreased localized vascular permeability.


Central Thermoregulation and Cellular Stabilization

The mechanism extends to the central nervous system (CNS), where the inhibition of PGE2 synthesis in the hypothalamus affects the elevated thermoregulatory set point. Additionally, Epirizole also exerts an ancillary mechanism by stabilizing lysosomal membranes and inhibiting the migration of inflammatory cells. These combined actions influence the dynamics within targeted pathways, affecting the hypothalamic set point and restricting cellular participation in the inflammatory process.

Dosage and Administration Information

Official Administration Guidelines

Dalex (Epirizole) is officially approved only for oral administration in its defined tablet or capsule forms. The high-level usage pattern is governed by strict requirements for frequency and timing relative to meals, as detailed in regulatory documents.

The medication is prescribed on a divided dosing schedule, typically requiring administration twice daily (BID) to maintain a consistent systemic presence. Crucially, administration must occur with or immediately after consuming food to adhere to official guidelines for proper intake. Tablets or capsules should be swallowed whole with water, without crushing or chewing.

The established usage framework mandates specific dosing rules and limits. The typical daily maintenance range for chronic conditions is established between 300 mg and 400 mg, with the absolute maximum daily dose that must not be exceeded being 400 mg. The protocol supports both short-term courses for acute symptoms and long-term plans for chronic conditions.

Procedural adjustments are mandatory for specific patient populations. A lower initial dose is explicitly required for older adults (the elderly) due to physiological considerations. A dose modification is also necessary when administering Dalex to individuals with known moderate renal impairment or moderate hepatic impairment. Should a scheduled dose be missed, official documentation advises resuming the normal BID schedule at the next scheduled time, rather than taking a double dose.

Recent Clinical Evidence

Research Evidence / Overview of Studies for Dalex (Epirizole)

This overview describes the scope of clinical research conducted on Dalex (Epirizole) and outlines the patterns observed in the studies, as documented in scientific and regulatory sources. This information is intended to contextualize the evidence base and is not medical advice.


Evidence for Chronic Inflammatory Joint Conditions

Research exploring how symptoms change over time in conditions like Rheumatoid Arthritis and Ankylosing Spondylitis has been conducted primarily through short-term, controlled clinical trials. These studies focused on episodic symptom patterns and included patients with active disease. Researchers monitored outcomes related to physical discomfort, such as pain intensity measured on standardized scales, joint stiffness, and swelling.

The findings from these trials describe patterns observed in the study populations, particularly in the initial weeks of use. Evidence contributes to understanding symptom patterns, but the findings describe group patterns, not personal outcomes. Long-term outcomes regarding whether the medicine alters the underlying damage to joint structures are not fully established by controlled studies.


Evidence for Acute Musculoskeletal Pain and Soft Tissue Injuries

Dalex was studied in research exploring short-term symptom changes in conditions associated with acute or disruptive episodes, such as sprains, strains, and general short-term musculoskeletal pain. The evidence is derived mainly from very short-term Randomized Controlled Trials (RCTs). Research examined outcomes related to physical discomfort and outcomes reflecting daily functioning, such as range of motion.

Studies conducted during periods of increased symptom activity reported how symptoms evolved in the observed populations, documenting changes in pain scores shortly after administration. The main research limitation frames reflect that follow-up durations were limited; studies were intensely focused on the immediate, acute phase.


Evidence for Symptomatic Relief in Osteoarthritis

For Osteoarthritis, Dalex was evaluated in short-term to intermediate-term Randomized Controlled Trials, examining patient-reported outcomes describing perceived discomfort linked to Osteoarthritis. Studies monitored outcomes linked to inflammatory or irritative states, focusing on patient-reported pain intensity and outcomes related to systemic or functional imbalance, such as ability to perform daily activities.

It is important to understand that the studies do not determine whether the medicine alters the underlying course of the disease or prevents joint cartilage degradation. The majority of high-quality trials are limited to intermediate durations (up to 12 weeks).


Evidence Gaps and Areas of Uncertainty

The research on Dalex highlights several key areas where evidence remains limited or uncertain. Follow-up durations were limited in many primary clinical trials, meaning long-term outcomes and the durability of response are not fully established. Furthermore, research exploring short-term symptom changes often includes mixed populations, and comparative evidence is lacking for newer, targeted therapeutic options. Data for certain groups, such as patients with specific organ issues or multiple comorbidities, remain insufficient.

Frequently Asked Questions (FAQ)

Common questions about Dalex (FAQ)

Q: Why is Dalex available only by prescription?

Dalex is classified as a Nonsteroidal Anti-inflammatory Drug (NSAID), a class of medicine associated with risks of serious adverse reactions, particularly cardiovascular thrombotic events and severe gastrointestinal issues. Due to these potential risks, the official regulatory label requires professional medical oversight for its use. This classification establishes the requirement that the medicine is only available by prescription.

Q: What is the usual time it takes to see an effect from Dalex?

Studies and official information indicate that Dalex begins to affect symptoms shortly after administration, particularly when managing acute pain. This finding indicates that the medication’s effects were observed shortly after administration in the study populations, but regulatory documents do not specify a precise time window (in minutes or hours) for when effects will peak.

Q: Is it normal to feel tired after starting Dalex?

According to the official product information, certain central nervous system effects are possible with this medication. Drowsiness and general fatigue are listed in the adverse reactions associated with the use of Epirizole.

Q: Can Dalex affect my mood?

Official safety data indicates that Dalex may affect the central nervous system. Mood changes, such as increased anxiety or symptoms of depression, have been noted in regulatory safety data for the drug.

Q: Does Dalex cause weight gain or loss?

Regulatory documents do not list weight change as a common or primary side effect. However, sudden or unexplained weight gain is noted as a potential indicator of fluid retention or reduced kidney function. These conditions are documented as potential adverse reactions associated with Dalex use.

Q: Is Dalex known to affect blood pressure?

Regulatory documents describe pharmacodynamic interactions where Dalex may diminish the intended therapeutic effects of medications prescribed for high blood pressure (Antihypertensives). This indicates the medication can influence the pathways that regulate blood pressure.

Q: Does Dalex cause problems with sleep?

Official safety information lists somnolence, which is a state of strong desire for sleep or drowsiness, as a potential adverse reaction. This is one of the central nervous system effects noted in the regulatory safety profile of the medication.

Q: Can Dalex be taken while breastfeeding?

The regulatory data currently states that it is unknown whether the active ingredient, Epirizole, is excreted into human milk. Official guidelines reflect this uncertainty, stating that use during lactation should be discussed with a healthcare provider.

Q: Does Dalex interact with common pain relievers like Tylenol?

Regulatory documents restrict taking Dalex concurrently with other NSAID-containing medicines, including Aspirin, due to documented gastrointestinal risks. There is no explicit interaction warning listed with non-NSAID relievers like Acetaminophen.

Q: Can I use Dalex if I have a history of heart issues?

Official safety labels highlight the risk of serious Cardiovascular Thrombotic Events, including heart attack and stroke, associated with the medicine. Additionally, official guidelines state the drug is contraindicated following coronary artery bypass graft (CABG) surgery.

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

Official, government-sourced prescribing information is published by regulatory agencies worldwide. This includes resources such as the FDA DailyMed website or the Summary of Product Characteristics (SmPC) published by European agencies.

Q: Does Dalex have a 'black box warning' from the FDA or equivalent agencies?

Specific regulatory information on Epirizole does not currently state that it is associated with an FDA-mandated 'Black Box Warning.' However, the regulatory label does contain important warnings regarding serious cardiovascular and gastrointestinal risks.

Q: Is Dalex considered a controlled substance?

Dalex is classified as a Nonsteroidal Anti-inflammatory Drug (NSAID) and is legally categorized as prescription-only. Official regulatory classifications confirm that it is not scheduled as a controlled substance.

Q: Does taking Dalex require special monitoring or blood tests?

The official product label requires caution and close monitoring for certain patient groups, such as older adults and those with renal or hepatic impairment. Monitoring, which may include specific blood tests for checking liver enzymes and blood cell counts, may be necessary, particularly during long-term use.

Q: What happens if Dalex is stopped suddenly?

Regulatory safety data warns against the abrupt discontinuation of Epirizole, particularly in certain patient populations. The regulatory data indicates that suddenly stopping the medicine may be associated with withdrawal symptoms.

How should Dalex be stored and disposed of?

Official Storage and Disposal Requirements

Official regulatory guidelines for Dalex (Epirizole), an oral solid dosage form, define strict controls for its stability and end-of-life disposal.

Category Regulatory Requirement
Storage Temperature Store at controlled room temperature (typically 20 C to 25 C).
Environmental Protection Protect from excessive heat, moisture, and light. Do not store in high-humidity areas, such as a bathroom.
Packaging Must remain in its original container with the lid or seal tightly closed. Keep the product from freezing.
Child Safety Keep Dalex out of the sight and reach of children at all times, a mandatory safety instruction for all medications.
Disposal Method Dispose of unused or expired medicine through an authorized drug take-back program.
Disposal Restriction Do not flush Dalex down the toilet or pour it into any drain or wastewater system to protect the environment.

These statements define the conditions necessary to maintain the product's quality and its final discard procedure, which prioritizes safety and proper environmental handling.

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

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