Uloric

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Uloric

Method of action: Antigout, Endocrine Therapy

Treatment option: Gout

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 Uloric

Property Description
Active ingredient Febuxostat
Form Oral, Film-coated tablet
Pharmacological class Xanthine Oxidase Inhibitor (XOI)
General use Management of hyperuricemia in adults with gout
Origin Synthetic, Non-purine compound

Uloric is a prescription-only medication specifically categorized as a Xanthine Oxidase Inhibitor (XOI), a highly targeted class of enzyme inhibitors. Its active ingredient is Febuxostat, a synthetic drug developed for the long-term management of chronic gout and hyperuricemia. Febuxostat is designed to decrease the amount of uric acid made by the body.

As a distinctive characteristic, Febuxostat is a non-purine agent, which sets it apart structurally from older XOI medications. This unique chemical profile is clinically recognized for providing effective control of serum uric acid concentration in patients requiring continuous therapy. This classification confirms its identity as a fundamental component of maintenance therapy for adults, such as those experiencing recurrent gout flares due to elevated uric acid levels.

Uloric is manufactured as an oral formulation, delivered in the form of a film-coated tablet designed for systemic absorption. The medication is a single-ingredient product, containing only Febuxostat as the key therapeutic compound. The medication acts to lower serum uric acid levels in patients with gout. The general purpose of this agent is to prevent the biochemical process that leads to high uric acid levels, thereby reducing the risk of crystallization in joints and tissues. This foundational role defines its use as a key strategy against hyperuricemia caused by overproduction of the compound.

Regulatory References

  1. MedlinePlus

What side effects are possible with Uloric?

Possible Side Effects and Safety Information

The safety profile for Uloric (Febuxostat) is classified by regulatory authorities based on the frequency and system-organ class of adverse reactions observed in clinical trials and post-marketing surveillance. This information is strictly derived from official prescribing documents.

Frequency-Classified Adverse Reactions

The most commonly reported adverse reactions (ge 1/100 patients) listed in official labeling include liver function abnormalities (transaminase elevations), nausea, arthralgia (joint pain), and rash. An increase in gout flares is very commonly observed after the initiation of therapy, which is considered a time-related safety pattern.

Reactions categorized as uncommon include atrial fibrillation, palpitations, dizziness, and pruritus. The classification of rare adverse reactions includes serious, life-threatening events.

Serious Safety Considerations

The official labeling highlights several serious adverse reactions:

  • Cardiovascular Risk: In patients with pre-existing major cardiovascular disease, a higher rate of cardiovascular death was observed compared to treatment with allopurinol, warranting a specific regulatory warning.
  • Severe Hypersensitivity Reactions: Rare but critical reactions, such as Stevens-Johnson Syndrome (SJS), Toxic Epidermal Necrolysis (TEN), and DRESS, have been documented, often occurring during the first month of treatment.
  • Hepatic Failure: Cases of fatal and non-fatal hepatic failure have been reported in post-marketing experience.

Safety Constraints and Limitations

Febuxostat is contraindicated with co-administration of mercaptopurine or azathioprine due to the risk of severe myelotoxicity (bone marrow suppression). The medication is generally not recommended for use in children or adolescents, in patients with severe hepatic impairment, or in those with secondary hyperuricemia due to limited safety data.

Overdose and Emergency Response

Overdose and when to seek help

The official regulatory documentation for Uloric (febuxostat) provides guidance on managing overexposure and identifies conditions that necessitate immediate medical care. This information is based on the authoritative U.S. Food and Drug Administration (FDA) prescribing information.


Documented Overdose Findings

Official regulatory information notes that no cases of overdose of febuxostat were reported during the drug’s clinical studies. Therefore, a specific clinical symptom profile directly resulting from acute overexposure is not documented in the product labeling.


Immediate Action and Emergency Triggers

Regulators require patients to seek emergency medical attention right away if certain severe manifestations occur while taking Uloric. Immediate help is mandated for signs of potential cardiovascular or cerebrovascular events, including chest pain, shortness of breath, rapid or irregular heartbeat, numbness or weakness on one side of your body, dizziness, trouble talking, or a sudden severe headache.


Management of Overexposure

Should overexposure occur, the official regulatory protocol is that management must consist of symptomatic and supportive care. The official labeling confirms that no specific antidote is known for Febuxostat overdose. The clinical decision to administer supportive care is based on the patient’s overall condition and vital signs.

Therapeutic Uses of Uloric

What Uloric Treats: Main Uses and Benefits

Uloric is commonly used to help with the long-term chronic care of hyperuricemia in adults who have been diagnosed with gout. The medication is considered relevant in clinical contexts where other initial urate-lowering therapies may not be appropriate.

The primary therapeutic benefit supports the patient in maintaining a lower serum uric acid level. This sustained control may assist with reducing the frequency of recurrent acute gout flares, which are characterized by sudden, pronounced joint pain and inflammation. Uloric is also applied in addressing symptom patterns associated with urate crystal deposits (tophi), and may assist with the reduction of existing deposits.

The core indications may include managing the underlying hyperuricemia, supporting the patient in reducing the frequency of acute flares, and assisting with the reduction of tophi. This therapeutic strategy supports patients facing conditions characterized by recurrent or episodic manifestations.

“The therapy is applied in addressing the episodic symptom pattern of sudden, pronounced joint pain and inflammation.”


Quick Fact: Relief for Gout Symptoms
Uloric supports the patient by easing the overall symptom load related to the chronic accumulation of urate crystals, helping to improve day-to-day comfort during symptomatic periods.

Eligibility and Restrictions for Use

Uloric (febuxostat) is officially indicated for the chronic management of hyperuricemia in adult patients with gout, specifically when allopurinol treatment has failed, is not tolerated, or is considered inappropriate. This defines its use primarily as a second-line therapy by regulatory authorities.

Contraindications and Prohibited Use

Use is strictly contraindicated in patients concurrently receiving the medicines azathioprine or mercaptopurine due to the risk of severe toxicity. It is also prohibited for individuals with known hypersensitivity to febuxostat. The treatment is not recommended for patients with asymptomatic hyperuricemia or those currently experiencing an acute gout attack.

Restricted and Conditional Eligibility

Population Group Regulatory Eligibility Status
Cardiovascular Disease Use should be reserved for patients who have exhausted allopurinol due to the documented risk of cardiovascular death.
Pediatric Use Not established (under 18 years of age); therefore, use is not recommended.
Severe Renal Impairment Requires a limitation on the maximum allowable daily dose.
Pregnancy/Lactation Not recommended for use during either period as safety data is insufficient or risk cannot be excluded.

This information defines the precise boundaries for patient eligibility as established by regulatory authorities.

What should I know about interactions with other medicines?

The official regulatory profile for Uloric (febuxostat) outlines specific constraints, primarily related to its function as a Xanthine Oxidase (XO) inhibitor and its effect on the plasma concentrations of certain co-administered substances.


Interaction Type Specific Agent(s) / Classification Regulatory Stance
Contraindicated Combinations Azathioprine and Mercaptopurine Prohibited; Co-administration is formally contraindicated due to the risk of severe toxicity.
Exposure Modification Naproxen Documented to increase febuxostat exposure (AUC/Cmax); No dose adjustment is required.
No Significant Interaction Warfarin, Theophylline Studies showed no clinically significant pharmacokinetic effect; No dose adjustment is necessary.

Officially Documented Constraints

  • Enzyme-Substrate Interaction: The medicine is contraindicated with drugs metabolized by XO, which increases their plasma concentrations and risk of severe toxicity.
  • Timing Requirement: The label requires concurrent prophylactic treatment with an NSAID or Colchicine upon initiation of Uloric.
  • Antacids/Food: Uloric can be taken without regard to food or antacid use, despite antacids being shown to decrease the peak concentration (Cmax) of the drug.
  • Population Note: Caution is advised in patients with severe hepatic impairment due to a lack of dedicated safety studies in this population.

Mechanism of Action

Molecular Inhibition of Uric Acid Synthesis

Uloric's active ingredient, Febuxostat, functions as a selective inhibitor of the Xanthine Oxidase (XO) enzyme complex, including its reduced form, Xanthine Dehydrogenase (XDH). The drug achieves its effect by forming a tight and stable bond with the enzyme's molybdenum-pterin active site. This interaction effectively blocks the two final steps in the purine catabolism pathway, arresting the conversion of precursors—hypoxanthine and xanthine—into uric acid.


Modulation of Systemic Urate Saturation

The arrest of uric acid synthesis leads to a lowering of the serum urate concentration (SUA) throughout the body. This systemic physiological change creates an environment where body fluids become undersaturated relative to monosodium urate crystals. This is the underlying mechanism that facilitates the dissolution and mobilization of existing urate deposits and limits the formation of new crystals by altering the chemical equilibrium.

Dosage and Administration Information

Official Administration Instructions for Uloric (Febuxostat)

Administration Scope Details
Route of Administration Oral (tablet)
Frequency and Timing Once daily, without regard to food or antacid use.

Official Dosing Schedule

Uloric is initiated at the lower dosage and may be adjusted based on the patient's serum uric acid (sUA) level. The recommended dosage range is 40 mg or 80 mg once daily.

  • Recommended Starting Dose: 40 mg orally once daily.
  • Dose Titration: If the patient does not achieve an sUA level of less than 6 mg/dL after two weeks with the 40 mg dose, the dose is increased to 80 mg once daily.
  • Maximum Dose: The recommended maximum dose is 80 mg once daily.

Special Procedural Conditions

  • Flare Prophylaxis: Concomitant therapy for gout flare prophylaxis, such as a non-steroidal anti-inflammatory drug (NSAID) or colchicine, is standard practice upon initiation of Uloric. This prophylactic treatment may be continued for up to six months.
  • During a Flare: If a gout flare occurs after starting Uloric, the protocol indicates that treatment is not discontinued. The flare is managed concurrently.
  • Missed Dose: Standard protocol for a missed dose involves taking it as soon as possible, unless it is almost time for the next scheduled dose. In such cases, the missed dose is skipped to return to the regular schedule. Doses are not doubled.

Dosage Adjustments

Patient Group Dosing Rule
Severe Renal Impairment (CrCl <30 mL/min) The dose is limited to 40 mg once daily.
Mild to Moderate Renal/Hepatic Impairment No dose adjustment is necessary.

Summary of Use Protocol

Uloric is administered orally once daily, regardless of meals, starting at 40 mg. The therapeutic protocol involves monitoring the serum uric acid level after two weeks to determine if a dose increase to 80 mg is required to reach the target level of less than 6 mg/dL. Prophylaxis is standard upon initiation to address potential flares during the early stages of therapy.

Recent Clinical Evidence

Summary of Research Focus and Findings

Febuxostat (Uloric) is a non-purine selective inhibitor of xanthine oxidase, the enzyme responsible for uric acid production. Research has investigated the compound's mode of action in laboratory and preclinical settings to understand its role in lowering serum uric acid (sUA) levels.

A series of studies has evaluated the effects of febuxostat on outcome measures related to gout, including sUA reduction and changes in established symptom scores. In these trials, the compound was examined as a single-agent intervention and in co-administration with other therapies. The research focused on whether the compound influenced biomarkers associated with tissue damage and disease progression.

Cardiovascular Safety Trials

The cardiovascular safety of febuxostat has been a major focus of clinical investigation. Two large-scale trials, CARES (Cardiovascular Safety of Febuxostat and Allopurinol in Patients with Gout and Cardiovascular Morbidities) and FAST (Febuxostat versus Allopurinol Streamlined Trial), compared febuxostat to allopurinol in patients with gout, many of whom had pre-existing cardiovascular (CV) risk factors.

Study Patient Population Key Finding (CV Endpoints)
CARES Gout patients with established major CV disease Found a higher rate of CV-related death and all-cause mortality with febuxostat compared to allopurinol.
FAST Gout patients with at least one CV risk factor Concluded that febuxostat was non-inferior to allopurinol regarding the primary composite CV endpoint.

Documented Events Profile

Safety profiles were assessed in these studies. Common adverse events documented in the trials included reports of gastrointestinal upset. The CARES and FAST results have led to regulatory guidance advising caution or avoidance of febuxostat in patients with established major cardiovascular disease. The research highlighted the need for further evaluation of the compound in populations with specific pre-existing conditions.

Frequently Asked Questions (FAQ)

Common questions about Uloric (FAQ)


Q: How long does it typically take for Uloric to start lowering uric acid levels?

According to official product information, monitoring the serum uric acid (sUA) level is performed as early as two weeks after starting Uloric. This timing allows the healthcare provider to assess if the treatment is effectively working toward the target sUA level of less than 6 mg/dL and if a dose adjustment is indicated.


Q: Can I drink alcohol in moderation while on Uloric?

Official drug labels do not list a specific interaction with alcohol. However, general medical principles for gout management often suggest caution regarding alcohol consumption, as it can potentially affect the effectiveness of treatment and increase the risk of liver-related effects associated with some medications.


Q: What is the risk of cardiovascular side effects with Uloric?

Studies, including the CARES trial, indicated that in patients with established major cardiovascular (CV) disease, there was a higher rate of CV-related death observed compared to those taking allopurinol. This finding resulted in a specific warning in the drug's official labeling.


Q: Is Uloric safe for people who already have heart conditions?

Official regulatory information indicates that the use of Uloric is typically limited to patients with established major CV disease who have had an inadequate response to or intolerance to allopurinol. The regulatory label contains a warning about the potential cardiovascular risks in this patient population.


Q: Can older adults safely take Uloric?

According to official regulatory documents, no dose adjustment is necessary for older adult patients based on age alone. However, cardiovascular risk and renal function in this population is a factor that the prescribing physician must consider during treatment.


Q: What does the research say about Uloric's effectiveness long-term?

Clinical studies have shown that Uloric demonstrated effectiveness in maintaining the target serum uric acid level of less than 6 mg/dL over the duration of the trials. This evidence supports its intended role in the long-term management of chronic hyperuricemia in adults with gout.


Q: Why did my doctor switch me from allopurinol to Uloric?

Official indications state that Uloric is generally used when treatment with allopurinol has resulted in an inadequate response or when a patient is unable to tolerate allopurinol due to side effects. It may also be prescribed if allopurinol treatment is considered inappropriate due to other medical circumstances.


Q: Can I take Uloric indefinitely, or is it a short-term treatment?

Uloric is officially indicated for the chronic management of hyperuricemia in patients with gout. This means the drug is intended to be used as a continuous, long-term maintenance therapy to keep uric acid levels under control.


Q: Are there generic versions of Uloric available?

Yes, the active ingredient in Uloric is febuxostat. The FDA's approved drug list confirms that generic versions of febuxostat are available at the various strengths. The availability of generic versions is confirmed by the FDA.


Q: What happens if I stop taking Uloric suddenly?

Since the drug is used for chronic management, sudden discontinuation may lead to a rise in serum uric acid levels. This increase in uric acid can be associated with a higher risk of experiencing acute gout attacks.


Q: Are there known interactions between Uloric and common herbal remedies?

Official drug labels do not specifically list known interactions with common herbal remedies. Regulatory guidelines recommend informing the prescribing physician of all co-administered medicines, including vitamins, minerals, herbal products, and other supplements, for a comprehensive review.


Q: Can Uloric be taken with high blood pressure medication?

The official label does not state a contraindication with the general class of high blood pressure medications. However, regulatory guidelines recommend informing the prescribing physician of all co-administered medicines for a comprehensive review.


Q: Why are people sometimes prescribed Uloric and colchicine at the same time?

It is officially recommended to start a concurrent prophylactic treatment, such as colchicine, when initiating Uloric. This is because rapid changes in serum uric acid levels, which occur when starting Uloric, can trigger an acute gout flare, and the prophylactic drug helps prevent this.


Q: Is Uloric safe for patients with a history of kidney stones?

The adverse event profile lists nephrolithiasis (kidney stones) as an uncommon side effect. The maximum dose is also restricted in patients with severe renal impairment, so the status of a patient's kidney health is a necessary factor for the prescribing physician to consider.


Q: Does Uloric interact with cholesterol-lowering drugs like statins?

The drug interaction section of the official label does not list a specific interaction or contraindication with the general class of statin drugs. However, regulatory guidelines recommend that patients inform their doctor of all medications, as both Uloric and statins belong to classes of drugs that may affect liver enzymes.


Q: What is the difference between Uloric and colchicine?

Uloric (febuxostat) is a xanthine oxidase inhibitor that works by reducing the body's production of uric acid for long-term control. Colchicine, conversely, is an anti-inflammatory medicine used to treat or prevent the painful inflammation of acute gout attacks.


Q: What precautions should women of childbearing age consider before starting Uloric?

Official European product information indicates that Uloric should not be taken during pregnancy as it is not known if it may harm the unborn child. Women who are pregnant, planning to conceive, or breastfeeding should discuss these plans with their healthcare provider before beginning treatment.


Q: What is the evidence regarding Uloric's safety profile in long-term use?

Long-term extension studies for Uloric have continued for periods of up to five years. These studies were used to evaluate the drug's sustained efficacy and its safety profile, particularly its risk relative to allopurinol concerning cardiovascular death.


Q: What are the signs that Uloric is working?

The primary measure that Uloric is achieving its goal is the clinical confirmation that the body's serum uric acid (sUA) level has dropped to the treatment target, typically less than 6 mg/dL. This key metric is monitored by the prescribing healthcare provider using regular blood tests.


Q: Is Uloric generally well-tolerated by most patients?

Official regulatory data lists the common adverse reactions reported by patients in clinical trials, including liver function abnormalities, nausea, and rash. Individual experiences with medication tolerability may vary.


Q: Can Uloric cause hair loss?

Hair loss or thinning of the hair has been reported in post-marketing clinical experience, though it is categorized as a rare adverse event. This means it is not one of the most common side effects observed in the patient population.


Q: How does Uloric differ from probenecid?

Uloric (febuxostat) is a xanthine oxidase inhibitor, which means it works by preventing the production of uric acid. Probenecid, however, belongs to a different class of drugs that works by increasing the amount of uric acid the body removes through the urine.


Q: What is the maximum duration of treatment studied in Uloric clinical trials?

Clinical trials and long-term extension studies conducted for Uloric have evaluated the drug's safety and efficacy for continuous treatment periods lasting up to five years.

How should Uloric be stored and disposed of?

How to Store and Dispose of Uloric (Febuxostat) Tablets

The storage and disposal of Uloric tablets must strictly follow the conditions specified in the official regulatory labeling.

Storage Requirements

Uloric must be stored at Controlled Room Temperature, defined as 20 to 25 C (68 to 77 F), with permitted excursions to 15 to 30 C. The product must be protected from light and moisture, and kept in its original container with the cap tightly closed. It is mandatory to keep Uloric tablets out of the reach of children to prevent accidental ingestion.

Disposal Instructions

Disposal of unused or expired Uloric must comply with local regulations. The official instructions advise against flushing the product into the sanitary sewer system. If a drug take-back program is unavailable, unused medication should be mixed with an undesirable substance (such as dirt or used coffee grounds) and placed into a sealed container before being thrown into the household trash.

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

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