Ürikoliz

Quick links to important sections

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 Ürikoliz

Property Description
Active Ingredient Allopurinol
Form Tablet (Oral), Intravenous Solution
Pharmacological Class Xanthine Oxidase Inhibitor
General Purpose Uric Acid Reduction
Origin Synthetic Compound (Purine Analog)

The medicinal product Ürikoliz is a branded Urate-Lowering Medication (ULT) used to manage conditions characterized by high levels of uric acid in the body. Its active component, Allopurinol, is a synthetic compound regarded as an essential medicine, underscoring its broad clinical utilization.


What Type of Medicine is Ürikoliz?

Ürikoliz is defined by its active component, Allopurinol, which is chemically structured as a purine analog. It belongs to the specific pharmacological class of Xanthine Oxidase Inhibitors, placing it within the broader group of Antigout Agents. Clinically recognized for its role in hyperuricemia management, Allopurinol is principally used to decrease the production of uric acid by targeting the final stages of purine breakdown. The product is primarily supplied as a Prescription-Only Tablet for oral administration for chronic therapy, and a separate sterile Intravenous preparation is available for specialized care.


The General Purpose of Ürikoliz

The overall purpose of Ürikoliz is to control and stabilize the concentration of uric acid in the body, which is particularly relevant in patients with elevated levels known as Hyperuricemia. This class of medication is intended to achieve long-term control of serum urate concentrations. Maintaining these concentrations provides the core benefit of preventing the precipitation of painful crystals in the joints and soft tissues. Maintaining safe uric acid levels is a foundational strategy for mitigating complications like recurring gout attacks and the formation of certain types of uric acid kidney stones.

Regulatory References

  1. World Health Organization

What side effects are possible with Ürikoliz?

Possible Side Effects and Safety Information

The safety profile for Ürikoliz (Allopurinol) is established through regulatory classifications that organize adverse reactions by frequency and affected system, strictly according to official government documents.

Documented Adverse Reactions

The most frequently reported adverse reactions are classified as common or with an incidence greater than 1%. These typically involve gastrointestinal disorders such as nausea, vomiting, and diarrhea, as well as dermatological effects, with skin rash being the most common adverse reaction. Other common reports include increases in liver function tests and renal failure or insufficiency.

System-Organ Class Common Adverse Reactions
Dermatological Skin rash
Gastrointestinal Nausea, Vomiting, Diarrhea
Hepatic/Renal Increased liver function tests, Renal insufficiency

Serious Safety Considerations

Official labels detail the risk of rare, severe adverse reactions, including Allopurinol Hypersensitivity Syndrome (AHS) and Severe Cutaneous Adverse Reactions (SCARs), such as Stevens-Johnson syndrome (SJS) and Toxic Epidermal Necrolysis (TEN). These are potentially fatal and often involve multiorgan pathology. The risk for these serious skin reactions is largely confined to the initial few months of therapy.

Specific safety considerations exist for certain populations. Patients with decreased renal function have a documented increased risk of skin rash. Individuals who carry the *HLA-B58:01 allele** (common in specific Asian and African ancestries) are recognized to have a substantially higher risk for AHS. Additionally, an increase in acute attacks of gout has been reported during the early stages of treatment. Official labeling also notes a required dose adjustment for co-administration with certain cytotoxic drugs to minimize toxic effects.

Overdose and Emergency Response

Overdose and When to Seek Help

Overdose with Ürikoliz is associated with severe, potentially life-threatening systemic toxicity. Official regulatory documents indicate that an acute overdose presents primarily with disturbances across the Gastrointestinal, Central Nervous, and Cardiovascular Systems.

Documented Overdose Presentations

Symptoms may include severe and persistent gastrointestinal distress (such as vomiting and profuse diarrhea), profound Central Nervous System (CNS) effects like somnolence, confusion, or loss of consciousness, and cardiovascular abnormalities, including significant hypotension and irregularities in heart rhythm.

Urgent Medical Action Required

The most important action is to seek emergency medical attention immediately if an overdose is suspected or confirmed. This urgent response is necessary if the patient exhibits severe vomiting, deep drowsiness, difficulty breathing, seizures, or signs of circulatory collapse.

Management procedures, as described in official labeling, focus on supportive and symptomatic treatment, maintaining an open airway, and closely monitoring vital signs and cardiac function in a medical setting. Immediate contact with a certified Poison Control Center is strongly recommended. Risk of severe intoxication is elevated with acute ingestion of doses significantly exceeding the maximum recommended amount, particularly in pediatric patients or those with known severe renal impairment.

Therapeutic Uses of Ürikoliz

Quick Facts

  • Gout: Used to help manage and prevent flare-ups associated with gout (a form of arthritis).
  • High Uric Acid: Indicated to support the reduction of elevated uric acid levels in the blood.
  • Chemotherapy Support: Used in clinical settings to help manage elevated uric acid that may occur during specific cancer treatments.
  • Kidney Stones: May be used as part of a care plan to support the prevention of certain types of recurrent kidney stones.

Ürikoliz is a prescription medication indicated for the management of conditions associated with elevated levels of uric acid in the body. The primary therapeutic use of this drug is to support the reduction of uric acid concentrations in the blood to levels that are considered acceptable for health management.

This medication is used in the chronic care of gout, a condition characterized by sudden, painful inflammation in the joints. It is administered to help limit the occurrence of gout flare-ups and to support the management of complications related to the condition, such as joint destruction or deposits.

Additionally, Ürikoliz is applied in specific cancer treatment settings. It is utilized to assist in controlling the rapid increase in uric acid levels that can result from the breakdown of tumor cells during chemotherapy. The medication may also be prescribed to help manage the risk of developing certain types of kidney stones in patients with established risk factors.

Regulatory References

  1. NIH MedlinePlus guidance

Eligibility and Restrictions for Use

Eligibility Profile: Who Can and Cannot Use Ürikoliz (Allopurinol)

This eligibility information is based strictly on official government regulatory documents (e.g., FDA Prescribing Information, EMA SmPC).

Contraindications (Must Not Use)

  • Known Hypersensitivity: Individuals with a history of an allergic or severe reaction to allopurinol or any ingredient in the product must not use this medicine.

Conditional or Restricted Use

Condition/Population Eligibility Rule
Impaired Kidney/Liver Function Use requires caution and a reduced dosage, as the body's ability to clear the medicine is affected.
*Genetic Risk (HLA-B58:01)** Patients of certain Asian descents may be at higher risk for severe skin reactions and require careful evaluation and monitoring.
Pregnancy/Lactation Safety has not been established; use is generally only recommended if the clinical benefit outweighs the potential risk.

Age and Condition Rules

  • Pediatric Patients are eligible primarily for hyperuricemia associated with cancer therapy (e.g., leukemia) or certain rare enzyme disorders.
  • Asymptomatic Hyperuricemia (high uric acid levels without symptoms) is a condition for which the use of this medicine is not recommended according to official labels.

What should I know about interactions with other medicines?

The official regulatory profile for Ürikoliz (Allopurinol) details specific restrictions and requirements for co-administration with other substances.

Interaction Scope Regulatory Description and Constraint
Formal Restrictions Specific combinations are prohibited. Co-administration of Pegloticase or Capecitabine is contraindicated and must be avoided. The antiviral agent Didanosine is also classified as a contraindication.
Pharmacokinetic Alterations Ürikoliz inhibits the metabolism of thiopurines such as Mercaptopurine and Azathioprine. This interaction significantly increases the systemic exposure of the co-administered thiopurine agent, requiring a mandatory dose reduction of that drug to manage the effect.
Pharmacodynamic Risks Concomitant use with certain medicinal products, including Ampicillin, Amoxicillin, and Thiazide Diuretics, increases the documented risk of serious skin reactions. The effect of Coumarin Anticoagulants may also be enhanced, as documented in regulatory labeling.
Timing Separation Rules The co-administration of oral Aluminum Hydroxide antacids must be separated by at least 3 hours. This procedural constraint is required to prevent the antacid from reducing the absorption of Ürikoliz and diminishing its effect.
Population-Specific Notes The increased risk of hypersensitivity reactions, such as skin rash, is heightened in individuals with decreased renal function who are receiving Thiazide Diuretics concurrently.

Connection to the overall interaction profile

Regulatory documents define the product's interaction structure primarily by mandating explicit restrictions for high-risk cytotoxic agents and by requiring specific dose or administration timing adjustments for other substances. This framework ensures that potential pharmacokinetic changes, such as enzyme inhibition leading to increased drug levels, and pharmacodynamic risks are formally addressed.

Mechanism of Action

Targeted Inhibition of Xanthine Oxidoreductase

The mechanism of Ürikoliz (Allopurinol) involves the specific, time-dependent inactivation of the enzyme Xanthine Oxidoreductase (XOR) . Its active metabolite, Oxypurinol, binds tightly to the enzyme's active site, establishing inhibition that halts the final conversion of precursor purine bases into uric acid. This action targets the end stage of the purine catabolism pathway, reducing the source of production.


Metabolic Redirection and Systemic Undersaturation

Blocking the production phase causes the immediate precursors, Hypoxanthine and Xanthine, to accumulate. This buildup promotes the reutilization of these purine bases back into the body's essential nucleotide pool, lessening the synthesis of uric acid. The physiological consequence of this systemic metabolic shift is the sustained reduction of serum uric acid concentration ( sUA) below its saturation threshold, maintaining a concentration below the saturation point.


The Mechanism of Crystal Dissolution

By maintaining the blood and tissue fluids in an undersaturated state, the drug establishes a chemical gradient that no longer supports the chemical precipitation of Monosodium Urate (MSU). This state thermodynamically favors the gradual dissolution and reabsorption of pre-existing urate deposits, disrupting the concentration necessary for the chemical initiation of crystal deposition.

Dosage and Administration Information

Instruction Map: How to use Ürikoliz — Official Administration Guidelines


Administration Scope

Route of administration: The primary route is Oral (tablet); an Intravenous (IV) Infusion is utilized only in specialized clinical settings, such as when oral intake is not feasible.

Dosing schedule: The initial adult oral dose for management is typically 100 mg once daily. This dose is gradually increased in increments of 100 mg weekly until a serum uric acid level of 6 mg/dL or less is attained, with a maximal daily recommended dose of 800 mg. For patients with impaired kidney function, the initial oral dosage is required to be reduced, often starting at 50 mg daily.

Timing in relation to meals (if applicable): Oral tablets are instructed to be administered following meals to improve physical tolerability and minimize gastric irritation.

Preparation requirements (if applicable): The IV powder for injection requires reconstitution and subsequent dilution to a final concentration that must not exceed 6 mg/mL for infusion.

Age-group administration rules: Pediatric use is generally restricted to hyperuricemia associated with malignancy, with dosing based on body surface area (e.g., 100 mg/m^2 every 8 to 12 hours).

Missed-dose rules: If a dose is missed, the user should not double the dose at the next scheduled time.

Special procedural conditions: Oral doses exceeding 300 mg daily must be administered in divided doses. Additionally, adult patients must maintain a sufficient fluid intake to yield a daily urinary output of at least 2 liters.


Instruction Classifications (High-Level)

Administration method type: Oral and Intravenous Infusion Frequency pattern: Daily, long-term maintenance Use-context constraints: Dose is titrated to an objective biochemical target (typically 6 mg/dL or less); dose is significantly reduced in cases of renal impairment.


Resulting procedural structure

Official step sequence:

  • Begin therapy with a low, single daily oral dose taken following a meal.
  • Adjust the dose gradually until the target serum urate level is achieved, not exceeding the 800 mg maximum.
  • Administer daily doses over 300 mg in divided doses.
  • Maintain mandatory high daily fluid intake to support proper utilization.

Connection to the overall use protocol (2–4 sentences): The use protocol for Ürikoliz is defined as a long-term, goal-oriented regimen that mandates precise, sequential dose adjustment based on therapeutic response. This approach ensures that the final maintenance dose is specific to the individual's requirement, remaining below the maximum recommended dose. The explicit instructions for post-meal intake, fluid management, and dose splitting are essential procedural requirements for correct administration.

Recent Clinical Evidence

Research evidence / Overview of studies for Ürikoliz

Evidence for Use in Gout and Chronic High Uric Acid

Research exploring Ürikoliz for high levels of uric acid and gout has included both Randomized Controlled Trials (RCTs) and large-scale observational studies. RCTs were conducted to measure specific biomarkers, such as the attainment of target serum urate levels, and to track outcomes related to physical discomfort, such as the frequency of gout flares. Research examined how symptoms evolved in the observed populations, and findings describe patterns measured in serum urate concentration.

Comparing Ürikoliz to Other Treatments and Placebo

Studies explored the attainment of specific urate levels against inactive treatments or active comparator treatments. Comparative trials also monitored long-term patterns related to cardiovascular outcomes. Findings from this body of research have been mixed or conflicting, leading to an acknowledgement that certainty remains low regarding certain long-term outcomes, especially when examining different study populations or designs.

Evidence for Preventing Complications during Cancer Therapy

Ürikoliz was studied for use in patients at high risk for Tumor Lysis Syndrome, a condition associated with temporary physiological imbalance during aggressive cancer treatments. The research primarily involved observational cohort studies that examined outcomes related to systemic imbalance, such as the levels of uric acid in the plasma, and monitored the incidence of acute complications like kidney injury. Research describes patterns observed over defined, short time intervals.

Evidence for Use in Kidney Stone Prevention

This medicine was studied for use in research exploring the prevention of recurrent calcium oxalate kidney stones. The research focused on individuals who also presented with hyperuricosuria (excessive uric acid in the urine). Studies included RCTs that examined outcomes related to the frequency of new stone formation and monitored changes in 24-hour urine uric acid excretion levels in this specific population subgroup.

Long-Term Studies and What is Still Uncertain About the Research

Long-term follow-up studies have been conducted to track measured changes over extended periods. Research examined outcomes related to all-cause mortality and cardiovascular events. However, the evidence quality varies across studies, and long-term effects are not fully established. Follow-up durations were limited in some early trials. Comparative evidence is lacking for certain outcomes. Data for groups such as the elderly population remain insufficient regarding age-specific effects, and research has not fully explored whether the group patterns observed apply consistently across age groups.

Key Studies & References

  1. Hyperuricosuric Calcium Oxalate Nephrolithiasis: Treatment with Allopurinol (Placebo-controlled trial of allopurinol for stone formers)
  2. Tumour lysis syndrome management: An update

Frequently Asked Questions (FAQ)

Common questions about Ürikoliz (FAQ)


Q: How quickly does Ürikoliz start to work?

A: According to official product information, the medicine's active substance is quickly absorbed and converted into its main long-acting component within a couple of hours. However, the medicine's overall goal is to gradually lower the total concentration of uric acid in the body over time. For this reason, achieving the full therapeutic effect is a process that requires continuous, ongoing use.


Q: How long do the effects of Ürikoliz last after taking it?

A: The effectiveness of a single dose relies mainly on the active component called Oxypurinol, which has a relatively long half-life, meaning it takes a long time for the body to clear half of it. Because of this, its effects are sustained enough to support the daily dosing schedule that is described in official guidance.


Q: What happens if I miss a scheduled amount of Ürikoliz?

A: Official guidance describes the protocol for a missed dose: the dose is taken as soon as it is remembered. However, if it is almost time for the next dose, the protocol is to skip the missed dose entirely and resume the regular schedule. It is advised not to double the amount at the next scheduled time.


Q: Is Ürikoliz generally considered a well-tolerated medicine?

A: Regulatory documents describe the frequency of side effects that have been reported by patients. The most frequently reported effects are generally related to the skin (such as rash) and the digestive system (including nausea and diarrhea). The official label describes the risk of rare, severe hypersensitivity reactions (AHS/SCARs), with the highest risk often occurring during the initial months of use.


Q: Can Ürikoliz cause changes in mood or sleep?

A: Official safety documents list drowsiness as a possible central nervous system side effect that has been reported. Other rare reactions reported include anxiety and depression. The official profile indicates that individuals may need to monitor for signs of adverse effects after starting treatment.


Q: Is Ürikoliz safe to use during pregnancy?

A: Safety for use during pregnancy has not been established in humans. The use of the medicine is typically considered when the healthcare provider determines that the clinical benefit outweighs the potential risk to the developing fetus. This determination is based on the limited data available from human experience and findings from animal studies.


Q: Can I use Ürikoliz while breastfeeding?

A: The active substance and its metabolite are known to pass into breast milk in small amounts. Official guidance suggests monitoring the infant for possible adverse effects, such as rash, vomiting, or diarrhea, while the medicine is in use.


Q: Can Ürikoliz be used with pain relievers like ibuprofen or acetaminophen?

A: The official label does not list formal drug-drug interactions with common non-prescription pain relievers such as Ibuprofen or Acetaminophen. However, many anti-inflammatory drugs can also affect the kidneys, which is a factor healthcare professionals consider when treating patients with reduced kidney function.


Q: Is Ürikoliz the same kind of medicine as [similar drug name]?

A: Ürikoliz's active ingredient, Allopurinol, is classified as a Xanthine Oxidase Inhibitor and a purine analog. It is defined by its specific chemical structure and how it acts to reduce the production of uric acid in the body.


Q: What is the biggest difference between Ürikoliz and other options?

A: Ürikoliz belongs to the class of Xanthine Oxidase Inhibitors, which fundamentally work by slowing down the body's natural production of uric acid. This mechanism of action is functionally different from other medications that may primarily act by increasing the rate at which uric acid is excreted by the kidneys or by reducing inflammation.


Q: Can Ürikoliz be used for things other than its main approved use?

A: Official regulatory documents clearly define the specific approved uses for the medicine. Specifically, use for asymptomatic hyperuricemia—which means having high uric acid levels without symptoms—is a condition that is formally not recommended according to official labels.


Q: Are the side effects of Ürikoliz permanent?

A: Regulatory warnings describe the potential for long-term or permanent damage from certain rare but severe skin reactions, such as Stevens-Johnson syndrome. This is the reason immediate discontinuation is required in such cases, as stopping the drug is necessary if these reactions are suspected.


Q: Is Ürikoliz safe for older adults (seniors)?

A: Regulatory information indicates that a lower starting dose is often suggested for older adults. This reflects the greater frequency of decreased kidney function often seen in this population. Therefore, dosing is approached with caution to account for these physiological changes.


Q: Can children or teenagers use Ürikoliz?

A: The use of this medicine in children and adolescents is limited to specific conditions as determined by a healthcare provider. The main approved uses for pediatric patients are hyperuricemia related to aggressive cancer therapy (such as leukemia) or certain rare enzyme disorders.


Q: What should I know about Ürikoliz if I have kidney issues?

A: Official guidance indicates that patients with impaired kidney function should receive a lower initial dose and be closely monitored. They also have a documented increased risk of skin rash and other reactions due to the way the body processes the medicine.


Q: Does Ürikoliz have any known food interactions?

A: Official regulatory guidance instructs the medicine to be taken following meals to improve physical tolerability and minimize potential stomach irritation. However, there are no formal regulatory warnings for interactions with specific foods that would change the drug’s effectiveness.


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

A: Official regulatory warnings advise caution when driving or operating hazardous machinery, as side effects such as dizziness and drowsiness have been reported. Individuals should determine how the medicine affects them before engaging in such activities.


Q: Is Ürikoliz addictive or habit-forming?

A: The medicine is not classified as a controlled substance, and there is no evidence in regulatory documents to suggest that Ürikoliz is addictive or habit-forming. The medicine is used for a chronic condition and is not associated with a withdrawal syndrome when treatment is stopped.


Q: What happens when people stop using Ürikoliz?

A: Stopping the use of the medicine does not cause a physiological withdrawal syndrome. The main concern when discontinuing treatment is the potential for the body's uric acid levels to return to high concentrations, which may lead to the recurrence of painful symptoms like gout attacks.


Q: What is the typical time frame people use Ürikoliz for?

A: The official protocol is defined as a long-term, goal-oriented regimen intended for chronic conditions like gout. Once the therapeutic goal of lowering the uric acid level is reached, treatment is typically maintained indefinitely to prevent future complications.


Q: Does alcohol interact negatively with Ürikoliz?

A: Official guidance suggests avoiding or limiting alcohol consumption, as alcohol can raise uric acid levels and counteract the purpose of the medicine. Alcohol may also increase the risk of central nervous system side effects like drowsiness associated with the medication.


Q: How is Ürikoliz different from an antibiotic?

A: Ürikoliz is classified as a Xanthine Oxidase Inhibitor, and its purpose is to decrease the body's production of uric acid. This is functionally different from an antibiotic, which is a type of medicine used specifically to fight bacterial infections.


Q: What kind of specialist usually prescribes Ürikoliz?

A: While many different clinicians may prescribe the medicine, the conditions Ürikoliz is used to manage—such as chronic gout and related hyperuricemia—are often managed by specialists like rheumatologists, as well as general primary care physicians.


Q: Is Ürikoliz a generic drug or a brand-name drug?

A: Ürikoliz is a brand name for the active ingredient, which is known generically as Allopurinol. Regulatory documents list the generic name and often reference multiple brand names available on the market.


Q: Can Ürikoliz be used alongside herbal remedies?

A: There is insufficient official information from regulatory bodies to definitively state whether complementary medicines, herbal remedies, or nutritional supplements are safe to use with Ürikoliz. These substances are not typically tested under the same strict regulatory requirements as prescription drugs.


Q: Is it okay to crush or chew Ürikoliz tablets?

A: Official guidance instructs the administration of the intact tablet following a meal. Regulatory labels state that the tablets are functionally scored, suggesting they can be divided if necessary, but there is no explicit authorization in the documents for crushing or chewing the whole tablet.


Q: Can Ürikoliz cause weight changes (gain or loss)?

A: Official safety documents list both weight loss and a decrease in appetite as rare side effects that have been reported. These changes are often associated with other systemic or digestive adverse reactions.


Q: Does Ürikoliz affect fertility?

A: There is no formal evidence in the regulatory documents to suggest that Ürikoliz reduces fertility in men or women. However, individuals planning to conceive typically discuss the use of any medication with their healthcare provider.


Q: How soon after stopping Ürikoliz can I resume taking [interacting substance/drug]?

A: The main active component of the medicine can take several days to be fully cleared from the body. Due to the long half-life of the active component, the safe resumption of certain interacting drugs is a process that requires the guidance of a healthcare provider.


Q: Can Ürikoliz cause problems with blood sugar levels?

A: While this medicine is not for blood sugar control, official documents list a documented interaction with Insulin. This interaction may be a factor in the clinical management of diabetic patients, potentially requiring careful monitoring.


Q: Does taking Ürikoliz affect the results of any laboratory tests?

A: Yes, official guidance indicates that regular blood and urine tests are utilized to monitor for unwanted effects and assess the medicine's activity. This monitoring checks for changes such as increases in liver function tests or decreases in some types of blood cells.


Q: Is there a patient information leaflet (PIL) available for Ürikoliz online?

A: Yes, information equivalent to the Patient Information Leaflet (PIL) or Consumer Information is readily available online. You can find the official drug facts and prescribing information on government websites like the National Institutes of Health (NIH) DailyMed and the U.S. Food and Drug Administration (FDA).


Q: What is the half-life of Ürikoliz?

A: The half-life refers to the time it takes for half the medicine to leave the body. The main active substance has a short half-life of approximately one to two hours, but its primary metabolite, Oxypurinol, has a much longer half-life of approximately 15 to 30 hours, which allows for daily dosing.

How should Ürikoliz be stored and disposed of?

Storage and Disposal Instructions for Ürikoliz

The storage and disposal requirements for Ürikoliz (allopurinol tablets) are defined by regulatory authorities to ensure product stability and safe environmental handling.

Required Storage Conditions

Ürikoliz must be stored at a temperature not exceeding 25 C (77 F). The product must not be frozen.

To maintain stability, the tablets must be kept in the original container, and the container must be kept tightly closed to protect the medicine from moisture. Consistent with standard requirements, Ürikoliz must be kept out of the sight and reach of children.

Official Disposal Rules

Unused or expired Ürikoliz must be disposed of according to local pharmaceutical waste handling procedures. The regulatory label states that the product must not be thrown away with household waste or flushed down the toilet, to prevent environmental contamination.

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

Available in countries:

Equivalent of Ürikoliz found in:

A-Z Index: