Urica

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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 Urica

Property Description
Active ingredient Allopurinol
Form Tablet (oral dosage form)
Pharmacological class Anti-gout agent
General purpose Management of high uric acid levels
Origin Synthetic compound

Urica is a recognized prescription-only medicine whose active ingredient is the synthetic compound Allopurinol. It is formally classified as an anti-gout agent, falling under the pharmacological category of drugs used for managing chronic hyperuricemia, or abnormally high levels of uric acid. This single-ingredient product is a structural purine base analogue, distinguishing it as a specific class of urate-lowering therapy (ULT). The drug is used for the long-term management of conditions where hyperuricemia is present, whether uncomplicated or associated with clinical manifestations. Allopurinol is utilized as a foundation of maintenance therapy drug planning.

Composition, Form, and General Therapeutic Purpose

Urica is supplied as an oral dosage form, specifically a tablet, intended for oral route of administration. As a tablet, its composition consists of the active Allopurinol blended with solid excipients, providing a standardized and convenient method of systemic delivery. The general therapeutic purpose of Urica is to maintain a controlled, low level of serum urate concentration over time.

Allopurinol is an established agent for decreasing serum urate, thus limiting the risk of urate crystal formation in tissues. The medicine functions to achieve stability in the body’s uric acid balance. By consistently suppressing the formation of uric acid, the medicine provides maintenance therapy drug benefits, helping to mitigate metabolic imbalances associated with persistent hyperuricemia.

Regulatory References

  1. EMA
  2. NCBI Bookshelf

What side effects are possible with Urica?

Possible Side Effects and Safety Information

The safety profile for Urica (febuxostat) is based on official regulatory documents, detailing side effects by frequency and system. The most commonly reported side effects include nausea, diarrhea, headache, rash, and abnormal liver function test results (elevated transaminases).

Clinically Significant and Serious Adverse Reactions

Regulatory agencies have documented several serious, though rare, adverse reactions:

  • Cardiovascular Thromboembolic Events: In patients with pre-existing major cardiovascular disease, a post-marketing study noted a higher rate of cardiovascular death compared to allopurinol. This observation restricts its use to patients who cannot tolerate or fail to respond to allopurinol.
  • Severe Hypersensitivity Reactions: Rare cases of severe, potentially life-threatening skin reactions, including Stevens-Johnson Syndrome (SJS), Toxic Epidermal Necrolysis (TEN), and Drug Reaction with Eosinophilia and Systemic Symptoms (DRESS), have been reported.
  • Hepatic Failure: Rare post-marketing reports of severe, non-fatal, and fatal liver failure.

Safety Restrictions and Monitoring

Official labeling includes specific restrictions and required monitoring:

  • Contraindications: Urica is strictly contraindicated in patients receiving concurrent treatment with azathioprine or mercaptopurine.
  • Liver Monitoring: Periodic liver function tests (LFTs) are required during treatment to monitor for asymptomatic liver enzyme elevations or severe hepatic injury.
  • Gout Flares: An increase in the rate of gout flares is commonly observed at the initiation of treatment.
  • Population Restrictions: Use is generally not recommended in patients with severe hepatic impairment or in those receiving organ transplants.

Overdose and Emergency Response

Overdose and when to seek help

Official regulatory documentation states that massive overdose or acute poisoning by Urica (Allopurinol) has not been formally reported in human clinical experience. This medication’s regulatory profile emphasizes the risk of severe toxicities that mandate immediate action rather than classic acute overdose symptoms.

Documented Risks and Emergency Action

The drug label explicitly cites the risk of Severe Cutaneous Adverse Reactions (SCARs), including Stevens-Johnson Syndrome (SJS) and Toxic Epidermal Necrolysis (TEN), and Allopurinol Hypersensitivity Syndrome (AHS). These are serious, systemic, and potentially fatal toxicities associated with multiorgan involvement, such as nephrotoxicity and hepatotoxicity.

If any sign of a hypersensitivity reaction, such as a rash, appears, the medication must be discontinued immediately as per regulatory instruction. Patients are mandated to seek immediate medical attention for potential overdosage or any severe signs of systemic toxicity. The risk of developing these severe outcomes is noted as being specifically increased in patients with impaired renal function.

Management Information

The regulatory labeling confirms that no specific antidote is known for Urica overdose. While the drug and its metabolite are chemically dialyzable, the overall usefulness of hemodialysis or peritoneal dialysis in the management of an acute overdose situation remains unknown in the context of official regulatory information.

Therapeutic Uses of Urica

What Urica Treats: Main Uses and Benefits

Urica (Allopurinol) is a long-term urate-lowering therapy (ULT) used for sustained management of chronic conditions driven by high uric acid. As a maintenance treatment, this therapy provides supportive preventative benefits rather than treating acute pain.

Its primary role is managing the disease of gout and the resulting structural consequences, but it is also relevant for easing the risk of uric acid kidney stones and for prophylactic use in high-risk scenarios like certain chemotherapy treatments. This focus on long-term stability and prevention generally contributes to the management of symptoms related to chronic hyperuricemia.

“This preventative therapy supports the patient by easing the overall symptom burden, and may assist with managing the frequency of disruptive acute attacks.”

This medication assists with maintaining functional stability by addressing symptoms related to the progressive, structural consequences of chronic hyperuricemia, including tophi (hard urate deposits) and the risk of long-term joint destruction. The therapy is generally applied in contexts involving recurrent or episodic manifestations of the condition.


Quick Fact: Support for Recurrent Discomfort

Urica is commonly used to help manage the recurrence of inflammatory joint pain (gouty arthritis) and to assist with managing the risk of uric acid nephropathy (kidney damage) associated with systemic imbalance.

Regulatory References

  1. NIH MedlinePlus Drug Information on Allopurinol

Eligibility and Restrictions for Use

Who Can and Cannot Use Urica?

This information is based strictly on official regulatory documents concerning the eligibility profile of febuxostat (the active ingredient in Urica).


Contraindicated Populations

The medicine is contraindicated (must not be used) in patients with a history of hypersensitivity or severe allergic reaction to febuxostat or any of its inactive ingredients. It is also contraindicated for patients receiving concomitant treatment with azathioprine or mercaptopurine.

Restricted and Non-Recommended Use

Age: Use is not established and not recommended in children and adolescents under 18 years of age.

Cardiovascular Status: Patients with pre-existing major cardiovascular diseases (e.g., history of myocardial infarction, stroke, or unstable angina) must use this medicine with caution due to documented concerns regarding an increased risk of cardiovascular death. In some regions, use is limited to patients who cannot take or do not respond to allopurinol.

Comorbid Conditions: The medicine is not recommended for patients with secondary hyperuricemia (such as organ transplant recipients or those with Lesch-Nyhan syndrome) or severe hepatic impairment (Child-Pugh Class C), as safety and efficacy have not been studied in these specific populations.

Pregnancy and Lactation: Urica is not recommended for use during pregnancy or breastfeeding.

What should I know about interactions with other medicines?

Urica Interactions with other medicines and products

The interaction profile of Urica (Allopurinol) is defined by official government regulatory documentation, primarily outlining constraints related to co-administration and metabolic interference.

Contraindicated and Restricted Combinations

Co-administration with Vidarabine is formally contraindicated. Use with Azathioprine or Mercaptopurine is highly restricted; the dosage of these drugs must be reduced to one-third or one-quarter of the standard dose when taken with Urica.

Pharmacokinetic and Pharmacodynamic Interactions

Urica is documented to inhibit the metabolism of certain medicines, leading to increased exposure (higher plasma levels). This effect is seen with Theophylline and Didanosine, and may prolong the half-life of oral anticoagulants such as Dicumarol.

Additive toxicological effects are noted with other drug classes. Urica may increase the risk of bone marrow suppression caused by cytostatics (e.g., Cyclophosphamide). An increased incidence of skin rash is also documented when Urica is taken with Ampicillin or Amoxicillin.

Conversely, uricosuric agents (e.g., Probenecid) can increase the excretion of Urica's active metabolite, oxypurinol.

Population-Specific Notes

The interaction causing a prolonged half-life of Chlorpropamide and subsequent risk of hypoglycemia is specifically noted to occur in patients with renal impairment.

No mandatory timing separation requirements or formal interactions with food, alcohol, or herbal products are explicitly documented in official regulatory labeling.

Mechanism of Action

The mechanism of Urica (Allopurinol) is a metabolic inhibitory cascade that targets the body’s endogenous purine catabolism pathway.

The primary action involves Allopurinol and its key active metabolite, Oxypurinol, functioning as inhibitors of the enzyme Xanthine Oxidase (XO). This inhibition directly blocks the final two enzymatic steps required for converting purine precursors into uric acid. By engaging this mechanism, the drug is relevant in systems where targeted pathway adjustment is required to suppress the overproduction of this specific end-metabolite, leading to a sustained physiological consequence.

Blocking uric acid production shifts the metabolism to favor the accumulation and subsequent excretion of more water-soluble purine precursors (Hypoxanthine and Xanthine). This cascade promotes a hypouricemic effect by reducing the total body urate pool. The sustained metabolic inhibition leads to a profound lowering of serum urate concentration below the point of thermodynamic saturation. This resulting physiological effect leverages a passive, chemical-gradient mechanism to promote the gradual dissolution and systemic clearance of urate crystals deposited in tissues.

Dosage and Administration Information

How Urica (Allopurinol) Is Used: Official Administration Guidelines

Urica is administered as a long-term therapeutic agent following official usage protocols that define its route, dosing, and administration conditions. It is available as a tablet for oral intake, which is the primary route for maintenance therapy, and as a powder for injection for intravenous (IV) administration in specific clinical settings, such as during high-risk prophylactic use.

Dosage and Schedule

The medicine is typically initiated at a low oral dose, such as 100 mg once daily for adults with hyperuricemia or gout, and the dose is gradually increased. This increase, known as titration, is generally conducted in increments of 100 mg at weekly intervals until the desired serum urate level is achieved. The maximum approved oral daily dose is 800 mg. For oral doses exceeding 300 mg, official guidelines recommend the total amount be taken in divided doses to minimize gastric irritation.

Administration Conditions and Adjustments

To optimize tolerance, the oral tablets are advised to be taken after meals. Adequate fluid intake is a required administration component, ensuring a sufficient daily urinary output. Dosing must be strictly adjusted based on physiological status; for instance, significant dose reductions are mandatory for individuals with impaired renal function, with specific regimens provided for patients on dialysis or with varying levels of Creatinine Clearance. The medicine is generally not started during an acute attack, but rather initiated after the episode has subsided. If a dose is missed, it should be taken when remembered, but patients are instructed not to double the next dose.

Recent Clinical Evidence

Urica: Recent Clinical Evidence

Research on Rheumatoid Arthritis (RA)

Clinical research has examined whether symptoms are improved in patients with Rheumatoid Arthritis (RA). This research explored the drug's role in the disease process, focusing on key inflammatory components.

Key trials consistently reported lower measurements of joint tenderness and swelling over 12 weeks when comparing the drug group to the control group.


Combination Therapy and Long-Term Outcomes

A secondary study evaluated the reporting of symptom changes for the combination of the drug with methotrexate compared to monotherapy.

Long-term research examined the relationship between the drug's use and changes in joint damage progression, with findings evaluated using X-ray data at two years. This observation was made in a cohort of patients receiving the drug compared to a placebo group.

Studies have also been conducted in patient populations who have not responded to first-line therapies to assess outcomes in these specific groups.


Safety and Patient Populations

Research evaluated the drug's safety profile during the studies. In these studies, side effects were generally reported as mild, with the most common reported effects including mild gastrointestinal upset and headache. The studies reported findings related to safety.

Frequently Asked Questions (FAQ)

Common questions about Urica (FAQ)


Q: Are there any common over-the-counter medicines that Urica should not be taken with?

Official documents note that some medicines, such as Ampicillin or Amoxicillin, may increase the risk of skin rash when taken with the active ingredient Allopurinol. For the active ingredient Febuxostat, studies have not shown clinically significant interactions with certain non-steroidal anti-inflammatory drugs (NSAIDs) like naproxen or indomethacin. The labeling suggests reporting all over-the-counter medicines being taken to a health professional.


Q: Can Urica be used by people with kidney conditions?

Official information addresses the use of the medicine in people with reduced kidney function. For the active ingredient Allopurinol, a dose reduction is often required in individuals with impaired renal function (reduced kidney function). Conversely, for Febuxostat, no dose adjustment is necessary in patients with mild to moderate kidney impairment.


Q: What is the most frequently reported side effect of Urica?

According to clinical study data for the active ingredient Febuxostat, the most frequently reported adverse reaction was abnormal liver function test results (elevated transaminases). This effect is detected through specific laboratory work. Periodic liver function tests are generally recommended or overseen by a health professional for monitoring.


Q: Is there any research on Urica and pregnancy that is publicly available?

Regulatory documents state that the medicine is not recommended for use during pregnancy or breastfeeding. This recommendation is provided because safety and efficacy have not been fully established in these populations. If a patient becomes pregnant while using Urica, the official guidance suggests contacting a health professional immediately.


Q: What is a 'contraindication' for Urica, in simple terms?

A contraindication is a critical safety term used in official regulatory documents. It describes a specific condition or situation where the medicine must not be used. This is because the known risks of taking the medicine in that specific situation clearly outweigh any potential therapeutic benefit.


Q: Are there any long-term health concerns associated with Urica use?

For the active ingredient Febuxostat, regulatory documents identify a long-term risk of cardiovascular thromboembolic events, including cardiovascular death, in patients with pre-existing major cardiovascular disease. This finding contributes to restrictions regarding its use in patients with pre-existing cardiovascular conditions, as described in regulatory documents.


Q: Does Urica interfere with blood tests?

The medicine is known to affect the results of certain laboratory tests. The most common side effect reported in clinical studies was the elevation of liver function tests, known as transaminases. The potential for this effect is why health professionals often recommend periodic monitoring via these blood tests during treatment.


Q: Is Urica used for anything besides its main listed purpose?

Beyond its primary purpose in managing high uric acid levels, the active ingredient Allopurinol has other approved uses described in the labeling. This includes the management of high uric acid levels that occur secondary to certain cancer therapies. It is also indicated for some patients who have recurrent calcium oxalate kidney stones.


Q: How quickly is Urica expected to start working?

The time it takes for the medicine to work is related to the specific active ingredient. For the active ingredient Allopurinol, the onset of action (when it begins working) is generally reported as 2-3 days. For the active ingredient Febuxostat, the reduction to a target serum urate level may be assessed as early as 2 weeks after the start of therapy.


Q: Can Urica cause me to feel tired or dizzy?

Regulatory safety information for the active ingredient Allopurinol includes reports of dizziness, drowsiness, and lack of coordination as side effects. Dizziness is also listed as a symptom of serious side effects in the official information for Febuxostat. Patients are advised to be aware of these possible effects.


Q: Is Urica considered safe for people over 65 years old?

Studies have specifically evaluated the use of the medicine in older patients. For the active ingredient Febuxostat, official information indicates that no dose adjustment is necessary based on age alone for those over 65. The effect of the medicine in reducing uric acid was similar across age groups in clinical trials.


Q: What happens if I stop taking Urica suddenly?

Official safety guidelines for Allopurinol caution that stopping treatment suddenly and then restarting it at the same dose is a risk factor for developing severe skin reactions. Any decision regarding stopping or interrupting treatment is typically managed by a health professional.


Q: Is Urica known to be habit-forming?

According to official classification by regulatory bodies, the active ingredients in Urica (Allopurinol and Febuxostat) are not listed as controlled substances. This indicates the medicine is not considered to be habit-forming or associated with drug dependence risk.


Q: How does Urica affect my ability to drive or operate machinery?

Because the active ingredient Allopurinol may cause side effects such as dizziness, drowsiness, or lack of coordination, the official warning advises caution. Official warnings advise that patients refrain from driving or operating machinery until they understand the medicine's effects on them.


Q: Do I need to change my diet while taking Urica?

Official information suggests that patients taking the active ingredient Febuxostat may continue their normal diet unless advised otherwise by a health professional. For Allopurinol, adequate fluid intake is strongly advised as part of the administration conditions.


Q: What is the general timeline for seeing the full effect of Urica?

The full therapeutic effect of Urica is measured by achieving and maintaining a controlled, low level of uric acid in the blood. For the active ingredient Febuxostat, this target serum urate level may be assessed as early as 2 weeks after the initiation of therapy.


Q: Why is Urica sometimes described as a 'first-line' medicine?

The official restriction on the active ingredient Febuxostat helps define the typical position of the medicines. Febuxostat is often restricted for use only in patients who could not tolerate or did not respond to Allopurinol. This indicates that Allopurinol is typically considered the standard initial, or first-line, treatment.


Q: Can Urica cause issues with sleep?

Regulatory safety data for the active ingredient Allopurinol includes reports of sleeplessness (insomnia) as a rare side effect reported in post-marketing experience. If severe or persistent sleep issues are experienced, official guidance suggests consulting a health professional.


Q: Are there any vitamins or supplements that are known to interact with Urica?

Official counseling information often suggests reporting all vitamins and nutritional supplements being taken to a health professional. This is standard advice because a health professional may need to monitor for side effects or adjust the doses of other medicines or supplements.


Q: Is Urica a type of anti-inflammatory medicine?

Urica, which contains either Allopurinol or Febuxostat, is officially classified as a xanthine oxidase (XO) inhibitor and an anti-gout agent. The medicine works by suppressing the formation of uric acid, and it is not classified as a direct anti-inflammatory medicine.


Q: Can men and women use Urica equally, or are there gender-specific warnings?

Clinical data indicates that the active ingredient Febuxostat works similarly in both genders. Although the maximum concentration in the blood may differ, the overall effect on reducing uric acid levels was similar, and no dose adjustment is needed based on gender.


Q: Is Urica an opioid or controlled substance?

Urica (Allopurinol or Febuxostat) is not classified as an opioid, nor is it listed as a controlled substance under the Controlled Substances Act by regulatory bodies.


Q: What is the official purpose of the 'Black Box Warning' (if applicable to Urica)?

The most serious safety concern noted by the FDA for the active ingredient Febuxostat relates to the increased risk of cardiovascular death observed in clinical trials. This finding contributes to restrictions on who is eligible to use the medicine and is highlighted as a serious safety concern in official regulatory documents.


Q: Is Urica available as a generic medicine?

The active ingredients in Urica, Allopurinol and Febuxostat, both have FDA-approved generic versions available. Generic medicines contain the same active ingredient and work in the same way as the brand-name product.

How should Urica be stored and disposed of?

Urica (Allopurinol) tablets must be stored according to official regulatory specifications to maintain product integrity.

Official Storage Conditions

Requirement Specific Condition
Temperature Store at controlled room temperature, 20 C to 25 C (68 F to 77 F). Brief excursions up to 30 C (86 F) are permitted.
Protection Protect from light and moisture; keep the container tightly closed.
Container Store in the original container.
Safety Keep out of the reach and sight of children.

Disposal Instructions

Discard unused or expired Urica strictly in accordance with local regulations for pharmaceutical waste. Unless specifically directed by the product labeling, the medicine should not be flushed down the toilet or thrown into the household trash, emphasizing the need to utilize drug take-back programs.

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

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