Ursacol

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Ursacol

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Medically reviewed

Marina Burgos

Last updated on 22/12/2025

This page provides general, reference-level information compiled from official medical sources. It is not a substitute for professional medical advice, diagnosis, or treatment. For decisions about your health, please consult a qualified healthcare professional.

Overview of Ursacol

Quick Facts

Property Description
Active ingredient Ursodiol (Ursodeoxycholic Acid, UDCA)
Form Oral preparation (Capsules or Tablets)
Pharmacological class Cholelitholytic agent, Hepatoprotective agent
Common use Modulating bile, protecting the liver, dissolving gallstones
Origin Secondary bile acid, synthesized for pharmaceutical use

Definition and Classification of Ursacol

Ursacol is a pharmaceutical preparation containing the active ingredient Ursodiol, chemically known as Ursodeoxycholic Acid (UDCA). This medication is clinically recognized for its role as both a cholelitholytic agent and a hepatoprotective agent, which means its therapeutic focus is centered on the dissolution of stones within the biliary system and overall liver health. Ursacol is administered as a single-ingredient product in an oral preparation and is available strictly as a prescription medicine. The pharmacological uniqueness of Ursodiol stems from its highly hydrophilic nature, which allows it to beneficially modify the body's bile acid pool.

Composition and General Purpose

While the active compound, Ursodiol, is a secondary bile acid that occurs naturally in human bile in trace amounts, the drug is obtained through synthetic production to ensure the high concentration and purity required for therapeutic effectiveness. The final medicine consists of the precise dosage of Ursodeoxycholic Acid along with pharmaceutical excipients necessary to form the tablet or capsule. The general purpose of this medicine is to safeguard the liver and support gallbladder function by altering bile chemistry.

As a cholelitholytic agent, the drug helps facilitate the dissolution of cholesterol gallstones by suppressing the liver's secretion of cholesterol into the bile, thereby reducing bile saturation. The use of Ursodiol for dissolving cholesterol gallstones is well-established for clinical application. A typical neutral use scenario for Ursacol involves its application in adult patients with non-calcified gallstones where active intervention is required.

What side effects are possible with Ursacol?

Possible Side Effects and Safety Information

The official safety profile for Ursacol (Ursodiol) outlines potential adverse reactions primarily categorized by frequency and the body system affected, consistent with regulatory standards. The most frequently observed reactions are generally gastrointestinal in nature.

Frequency-Classified Adverse Reactions

Frequency Category Associated Adverse Reactions (Examples)
Very Common (ge 10%) Diarrhea, Abdominal Pain (e.g., upper right)
Common (ge 1% to < 10%) Nausea, Vomiting, Constipation, Rash, Alopecia
Very Rare (< 0.01%) Decompensation of Hepatic Cirrhosis

System-Organ Classes: Adverse reactions are typically reported within the Gastrointestinal Disorders and Hepatobiliary Disorders classes, alongside listings for Skin and Subcutaneous Tissue Disorders and Nervous System Disorders (e.g., headache).

Serious Adverse Reactions and Safety Constraints

Regulatory documents list certain rare events as clinically serious, including the decompensation of hepatic cirrhosis in patients with Primary Biliary Cholangitis (PBC), and rare reports of enterolith formation leading to potential obstruction. Severe manifestations of drug hypersensitivity, such as angioedema, are also documented.

Safety Restrictions: Ursacol is contraindicated (should not be used) in patients diagnosed with complete biliary obstruction or decompensated hepatic cirrhosis, as these conditions carry a heightened risk. Furthermore, regulatory agencies require the regular monitoring of liver function tests during therapy, which is a key safety measure to observe the drug's effect on hepatic parameters.

Overdose and Emergency Response

Overdose and when to seek help

The official regulatory information regarding Ursacol (ursodeoxycholic acid) indicates that the potential for severe, life-threatening systemic overdose is considered unlikely. This assessment is based on the substance's pharmacokinetic profile, where the body’s absorption of ursodeoxycholic acid decreases as the dose increases, resulting in the excess being excreted through the feces.

Documented Overdose Manifestations and Management

Overdose Manifestation Action Required
Diarrhea (most likely sign of severe overdose) Therapy should be discontinued; fluids and electrolytes must be restored.
Other symptoms of overdose Generally considered unlikely due to limited absorption.

Should an overdose occur, the primary and most likely clinical manifestation is diarrhea. The consequence of persistent diarrhea should be treated symptomatically to restore the body's essential fluid and electrolyte balance. Official regulatory documents state that specific counter-measures, beyond this symptomatic treatment, are not generally necessary.

Seeking Medical Help

While severe systemic toxicity is considered rare, immediate medical consultation is necessary if persistent or severe diarrhea develops following the use of high doses. Discontinuation of the medication, under medical guidance, is the required action if diarrhea continues.

Therapeutic Uses of Ursacol

What Ursacol Treats: Main Uses and Benefits

The therapeutic scope of Ursacol (Ursodiol) is relevant in managing conditions that present with systemic or localized discomfort linked to organ-specific functional stress. The medication is commonly used across domains where additional symptomatic support is needed for chronic liver conditions and biliary tract issues.

Ursacol is a foundational therapy for conditions like Primary Biliary Cholangitis (PBC), and it is also utilized for managing small, cholesterol-rich gallstones and the prevention of gallstone formation in high-risk patients. For PBC, the benefit is considered relevant for long-term health, as it supports improvement in liver function parameters and may assist with maintaining functional stability. Furthermore, Ursacol helps manage symptoms like the disruptive pruritus (itching) that can accompany cholestatic conditions, contributing to easing the overall symptom load.


Quick Fact: Relevant for Managing Cholestasis-Related Symptoms

Category Therapeutic Use Focus
Primary Indication Chronic management of Primary Biliary Cholangitis (PBC).
Biliary Domain Applied in the context of cholesterol gallstone dissolution (small, non-calcified stones).
Prophylaxis Prevention of gallstones in high-risk patients (e.g., rapid weight loss).
Symptom Relief Easing pruritus (itching) and stabilizing liver enzyme levels.

Regulatory References

  1. NIH MedlinePlus overview of Ursodiol

Eligibility and Restrictions for Use

Ursacol (ursodiol) is a prescribed medicine for specific patient groups and is not suitable for everyone. Eligibility is strictly defined by official regulatory documents.

Populations Allowed and Contraindicated

Classification Who Can Use (Eligible Patients)
Eligible Adults with Primary Biliary Cirrhosis (PBC); adults with radiolucent, noncalcified gallbladder stones who cannot undergo surgery; obese patients to prevent gallstone formation during rapid weight loss.
Classification Who Cannot Use (Contraindicated/Not Recommended)
Contraindicated Patients with a known hypersensitivity to ursodiol or its components. Also contraindicated for patients with calcified or radiopaque stones, or those with a blocked bile duct or conditions requiring urgent gallbladder removal (e.g., acute cholecystitis, cholangitis, or gallstone pancreatitis).

Special Eligibility Considerations

Pregnancy and Lactation: Use during pregnancy is generally not recommended due to a lack of sufficient safety data, though some studies suggest benefits in specific liver conditions. For nursing mothers, regulatory documents state that a decision should be made to discontinue either breastfeeding or the medicine.

Age-Related Rules: Safety and effectiveness for use in pediatric patients (children) have not been established in the context of the main prescribing information.

Condition Constraints: For gallstone dissolution, the medicine is only appropriate if stones are radiolucent (non-calcified) and the gallbladder is functional. Treatment beyond 24 months for gallstone dissolution has not had its safety established.

What should I know about interactions with other medicines?

Interactions with Other Medicines and Products

Ursacol (Ursodiol) has documented interactions with certain medicinal products that can affect its effectiveness or absorption. Patients should be aware of these potential interactions, which are described in official regulatory information.


Interactions Affecting Ursacol Absorption

Drugs that bind bile acids or aluminum can reduce the absorption and, consequently, the effectiveness of Ursacol. These include:

  • Bile Acid Sequestering Agents: Products such as cholestyramine and colestipol.
  • Aluminum-Containing Antacids: Antacids containing aluminum hydroxide.

Action Required: If co-administration with these agents is necessary, a separation in the timing of administration is required to mitigate the reduced absorption of Ursacol.


Interactions Counteracting Therapeutic Efficacy

Certain medications can increase cholesterol secretion into the bile, which directly opposes the intended therapeutic action of Ursacol (gallstone dissolution).

  • Estrogens and Oral Contraceptives (containing estrogens).
  • Lipid-Lowering Agents: Specifically clofibrate and other fibrates.

Restriction: Concomitant use with these medications is discouraged as they may counteract the effectiveness of Ursacol, reducing its ability to dissolve cholesterol gallstones. This effect is a documented pharmacodynamic opposition.

Mechanism of Action

Ursodiol (UDCA) achieves its effect profile through two primary, interconnected mechanistic domains within the enterohepatic system, influencing both bile composition and hepatocellular integrity.

Modulation of Bile Composition and Cholesterol Desaturation

The highly hydrophilic UDCA displaces other toxic bile acids and actively interferes with cholesterol transport by inhibiting its absorption in the intestine and reducing its secretion from the liver. This cascade of actions shifts the bile from a lithogenic (stone-forming) state to a solubilizing state, which is the necessary physicochemical prerequisite for cholesterol dissolution.

Hepatocellular Cytoprotection and Biliary Flow

UDCA exerts direct cytoprotective action by stabilizing the mitochondrial and cell membranes of hepatocytes and cholangiocytes, blocking the signaling that leads to apoptosis (cell death). This mechanism is complemented by the drug's stimulation of bicarbonate and water secretion, enhancing the volume and alkalinity of bile flow (choleresis) to maintain the integrity of the bile duct lining and supporting transport processes.

Dosage and Administration Information

The administration of Ursacol (ursodiol) is exclusively via the oral route, utilizing available tablets or capsules. The dosing regimen is based on the clinical context and is calculated according to the patient's body weight, establishing a precise, non-advisory use pattern.

Official Dosing and Administration

For the management of Primary Biliary Cholangitis (PBC), the regimen is typically 13–15 mg/kg per day, administered in two to four divided doses with food. When the medication is used for the dissolution of cholesterol gallstones, the dosage is generally 8–10 mg/kg per day, divided into two or three administrations. To support efficacy during the night, it is standard procedural guidance to take the largest portion of the daily dose at bedtime for dissolution therapy. Dosing for the prevention of gallstone formation in high-risk patients is often a fixed amount, such as 300 mg twice daily.

Administration Conditions and Duration

Tablets that are scored (e.g., 500 mg strength) can be broken in half to provide a required dose, but the segments must be swallowed unchewed with water immediately. A critical administration constraint is the requirement to separate the intake of Ursacol from bile-acid binding agents or aluminum-containing antacids by at least two hours to prevent impaired absorption. The duration of use is generally long-term for chronic conditions like PBC. For gallstone dissolution, treatment may last up to two years and is required to continue for three to four months after the stones have radiologically disappeared to confirm clearance. If a dose is missed, the standard procedure is to skip the missed dose if it is near the next scheduled time; double doses must not be taken.

Recent Clinical Evidence

Research Evidence / Overview of Studies for Ursacol

Evidence for Use in Primary Biliary Cholangitis (PBC)

Clinical research for Ursacol in the setting of Primary Biliary Cholangitis (PBC) has been the subject of research. Studies have included randomized controlled trials (RCTs) as well as extensive observational cohort studies. Researchers focused on measuring changes in biochemical markers (like ALP and bilirubin) and tracking hard clinical endpoints, such as the need for liver transplant or all-cause mortality.

Studies reported measurements showing shifts in key liver biochemical markers over the observed time intervals. For long-term outcomes, data show patterns related to these events, particularly in individuals who demonstrated specific changes in their markers early in the study course. Long-term cohort evidence contributes to the broader evidence landscape. What remains uncertain is the absolute consistency of long-term clinical findings across all populations.

Evidence for Use in Dissolution of Cholesterol Gallstones

Research has explored the use of Ursacol in studies evaluating gallstone dissolution. The studies conducted were primarily prospective clinical trials that focused on specific patient populations, including those with small to medium-sized, radiolucent (non-calcified) gallstones. Trials reported the percentage of patients achieving complete or partial disappearance of the gallstones.

Studies report that the patterns observed in dissolution rates were associated with the stone's initial size and composition. Results apply only to the highly specific patient populations studied, and uncertainty persists regarding the long-term recurrence rate after treatment has stopped.

Long-Term Studies and Extended Follow-up Data

Studies describe patterns observed over extended follow-up regarding the use of Ursacol, sometimes tracking patients for many years. The primary goal of these long-term studies was to track patterns observed in biochemical markers and their relation to long-term clinical outcomes. However, the evidence quality varies across these studies, as many are observational rather than randomized.

What is Still Uncertain About Ursacol

Despite the large amount of research, several aspects remain uncertain. Data are still emerging to fully understand the consistency of long-term outcomes for all patients with PBC. Evidence quality varies across studies, and data for certain patient groups (like those with advanced PBC or symptomatic gallstones) remain insufficient. Research provides context but not individual predictions.

Frequently Asked Questions (FAQ)

Common questions about Ursacol (FAQ)


Q: How long does it typically take for Ursacol to start working for liver conditions?

A: Studies related to Primary Biliary Cholangitis (PBC) indicate that improvement in key biochemical markers—which are measurements in the blood used to track liver health—is typically observed within three to six months of beginning treatment. The duration of therapy for chronic liver conditions is generally long-term. Assessment of the drug's effect involves the monitoring of these markers.


Q: Is it common to have diarrhea when starting Ursacol treatment?

A: Diarrhea is classified in official drug documents as a very common adverse reaction, meaning it occurs in more than 10% of users. Regulatory information indicates that gastrointestinal symptoms such as this are often observed to resolve within about three months of starting the therapy.


Q: Does taking Ursacol mean I can avoid surgery for my gallstones?

A: Ursacol is indicated as a treatment option for dissolving cholesterol gallstones in patients who cannot or do not wish to undergo surgery. While it provides a non-surgical alternative for selected patients, the official documentation does not guarantee that every patient will avoid surgery. The course of treatment is monitored through regular imaging.


Q: Why is Ursacol often recommended to be taken at bedtime?

A: For patients using Ursacol to dissolve gallstones, official guidance often suggests taking the largest portion of the daily dose at bedtime. This practice aims to support the drug's intended action during the night when the concentration of natural bile acid is typically lower.


Q: Can I still take antacids while using Ursacol?

A: Co-administration with antacids containing aluminum requires a separation in timing. Aluminum-based antacids are known to interfere with the absorption of Ursacol, which can reduce its effectiveness. To mitigate this interaction, official information advises taking these antacids at least two hours before or two hours after you take Ursacol.


Q: Are headaches a common side effect of Ursacol?

A: Headache is listed in regulatory-linked sources as a potential adverse reaction affecting the central nervous system. However, a specific frequency (such as 'Common' or 'Very Common') is not consistently defined across all primary regulatory documents for this particular side effect.


Q: What is the evidence for using Ursacol for conditions other than gallstones and PBC?

A: While regulatory approval is centered on the dissolution of gallstones and Primary Biliary Cholangitis (PBC), studies have explored the drug's effects on other liver issues, such as non-alcoholic fatty liver disease. However, current authoritative guidelines may not recommend its use across all non-cholestatic liver diseases.


Q: Is it possible for a gallstone to become calcified while on Ursacol?

A: Ursacol is designed to dissolve non-calcified (radiolucent) cholesterol stones. Official documents advise that if stone calcification (hardening) occurs or if the gallbladder stops working during treatment, the therapy should be discontinued. The drug is contraindicated if stones are already calcified.


Q: How does Ursacol help prevent the formation of new gallstones?

A: The drug's mechanism involves making bile less saturated with cholesterol. It does this by decreasing the liver's secretion of cholesterol and by helping to dissolve existing cholesterol in the bile. This process shifts the bile to a state that actively works against the crystallization and formation of new cholesterol-based gallstones.


Q: Can Ursacol help with elevated liver enzymes even if I don't have gallstones?

A: Yes. Ursodiol has been shown to result in a decrease in elevated serum enzyme levels—such as alkaline phosphatase, AST, and ALT—in various conditions involving impaired bile flow, including PBC. This beneficial effect on liver enzyme elevations is linked to the drug's ability to replace more toxic bile acids.


Q: What is the difference between Ursacol and other drugs used for liver support?

A: Ursacol is classified by regulatory bodies as a Cholelitholytic Agent (gallstone dissolving agent) and a Hepatoprotective agent (liver protecting agent). This classification is based on its primary action of altering bile acid composition and protecting liver cells, distinguishing it pharmacologically from other types of medicines used for general liver support.


Q: Does Ursacol cause weight gain or weight loss?

A: Weight gain is reported as an uncommon side effect in official information. Weight loss is not typically listed as a common or frequent adverse reaction in the official product profile.


Q: Can Ursacol cause issues with sleep or fatigue?

A: Official information lists both fatigue and sleep disorder as potential adverse reactions affecting the central nervous system. These are part of the drug's recognized safety profile.


Q: Is Ursacol an anti-inflammatory drug?

A: Ursacol's primary classifications are as a cholelitholytic and hepatoprotective agent. However, some scientific information suggests the drug may also have anti-inflammatory effects and it is used for its anti-cholestatic (improving bile flow) action, which can have secondary protective effects.


Q: Are there specific food or diet restrictions while on Ursacol?

A: There are no strict mandatory food rules or diet restrictions explicitly outlined in the main regulatory documents for Ursacol itself. General medical practice for liver conditions sometimes involves limits on high-fat foods and alcohol to reduce stress on the liver, but no specific food rules are mandatory for the drug itself.


Q: Does Ursacol help to reduce bilirubin levels?

A: Yes. In the treatment of Primary Biliary Cholangitis (PBC), regulatory efficacy data indicates that Ursacol can lead to significant improvement in serum liver chemistries, including a reduction in total bilirubin levels when tracked against baseline measurements.


Q: Are there specific vitamins or supplements that are known to interact with Ursacol?

A: While direct specific vitamin listings are rare, official information on the drug's class indicates that bile acid absorption can potentially affect the absorption of fat-soluble vitamins (A, D, E, and K). These vitamins may need to be monitored in patients receiving long-term therapy.


Q: Is Ursacol known to cause any changes in mood or lead to depression?

A: Official safety data lists anxiety and depression as potential adverse reactions affecting the central nervous system.


Q: Is there a maximum time someone can stay on Ursacol therapy?

A: The maximum duration depends on the condition. For Primary Biliary Cholangitis (PBC), treatment is generally required to be long-term and indefinite. For the dissolution of gallstones, treatment is typically recommended for a period of up to two years.


Q: What are the signs that Ursacol is working for my condition?

A: The drug's effectiveness is primarily measured by a reduction in elevated serum liver enzyme levels (such as alkaline phosphatase, AST, and ALT) and other biochemical markers. These specific shifts are monitored and assessed through regular blood tests.

How should Ursacol be stored and disposed of?

How to Store and Dispose of Ursacol?

Ursacol (Ursodiol) storage and disposal must adhere to official regulatory requirements to maintain product stability and safety.

Official Storage Requirements

Condition Requirement
Temperature Store at controlled room temperature, typically 20 C to 25 C (68 F to 77 F). Do not freeze.
Protection Keep in the original, tightly closed container and protect from excessive moisture and direct light.
Stability Note Broken or partial tablets must be used within 28 days of breaking.
Child Safety Mandatory to keep medication out of the sight and reach of children and pets.

Disposal Instructions

Expired or unused Ursacol should be disposed of according to local regulatory guidelines for unused medication. Patients must not flush the medicine down the toilet or pour it into a drain unless specifically authorized to do so.

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

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