Ursosan (Ursodiol)

Quick links

Choose a section

Quick links to important sections

Advertisements

Ursosan (Ursodiol)

Advertisements
Advertisements

Treatment option:

Advertisements

Overview of Ursosan (Ursodiol)

Ursosan is a pharmaceutical product containing the active ingredient Ursodiol, which is the generic name for Ursodeoxycholic acid (UDCA). It is a bile acid preparation classified as a cholelitholytic agent and a hepatoprotector, primarily intended to help normalize the physical properties of bile and protect liver cells.

Property Description
Active Ingredient Ursodiol (Ursodeoxycholic acid, UDCA)
Form Capsules, tablets, oral suspension
Pharmacological Class Cholelitholytic agent, hepatoprotector
Origin Naturally occurring (but synthetically produced)
Route of Administration Oral

What Type of Medicine is Ursosan (Ursodiol)?

Ursosan (Ursodiol) belongs to the pharmacological class of bile acids, officially classified as a cholelitholytic agent, used to dissolve certain gallstones, and also recognized for its hepatoprotector properties. The active component, Ursodeoxycholic acid (UDCA), is a secondary bile acid that occurs naturally as a minor constituent of human bile; however, the compound used in medicine is manufactured synthetically to ensure standardized purity and concentration. Other pharmaceutical preparations containing Ursodiol include Ursofalk and Actigall.

The core of this medicine’s function is centered on its highly hydrophilic bile acid nature. This characteristic is clinically recognized for its ability to modulate the bile acid pool composition within the liver and biliary tract, promoting a healthier chemical environment compared to the effects of accumulated hydrophobic bile acids.


Composition, Forms, and General Therapeutic Purpose

Ursodiol is a prescription-only medication available in multiple dosage form(s), including capsules, tablets, and oral suspension, intended for oral route ingestion. Its general therapeutic purpose is to resolve imbalances in the bile system by providing cytoprotective benefits and facilitating bile flow.

The general benefit is twofold: the compound helps dissolve specific types of non-calcified gallstones by acting as a cholesterol solubilizer and reducing the lithogenicity of bile, and it offers critical support to hepatocytes (liver cells) by stabilizing their membranes. The mechanism of action is distinct, as demonstrated by its anti-cholestatic properties. This cytoprotective agent mechanism is key to managing conditions where bile acids accumulate, supporting the overall function of the liver.

Regulatory References

  1. Ursodiol: MedlinePlus Drug Information
Advertisements

What side effects are possible with Ursosan (Ursodiol)?

Ursodiol's official safety profile is based on classifications derived from regulatory documents, grouping potential effects by incidence and the body system affected. The most frequently reported adverse reactions concern the gastrointestinal system.

Official Adverse Reactions by Frequency

Regulatory agencies classify adverse reactions according to their incidence observed in clinical use:

  • Very Common (Affects more than 1 in 10 users): Diarrhea, pasty stools.
  • Common (Affects up to 1 in 10 users): Upper abdominal pain or discomfort.
  • Very Rare (Affects up to 1 in 10,000 users): Calcification of gallstones (during dissolution treatment), decompensation of hepatic cirrhosis (in advanced Primary Biliary Cholangitis (PBC) patients, which may regress upon discontinuation).

Other adverse effects documented in official labeling include pruritus (itching) and rash, classified under Skin and Subcutaneous Tissue Disorders, and elevations in liver enzyme levels, classified under Hepatobiliary Disorders.

Safety Considerations and Restrictions

The medicine is officially restricted for use in specific situations, primarily related to the biliary tract and liver function. These restrictions include acute inflammation of the gallbladder or biliary tract, complete occlusion of the biliary tract (e.g., common or cystic duct), and a non-functioning gallbladder. Furthermore, it is not indicated for patients with radio-opaque calcified gallstones.

Time-Related Safety Note

Official prescribing information notes that in patients with Primary Biliary Cholangitis (PBC), a temporary worsening of symptoms, such as pruritus, may occur at the beginning of treatment.

Advertisements

Overdose and Emergency Response

Overdose and When to Seek Help

The information regarding overdose for Ursodiol (Ursosan) is based strictly on descriptions found in official government regulatory documents.

Documented Overdose Manifestations

Official labeling indicates that the most likely manifestation of a severe oral overdose is diarrhea. This is attributed to the drug’s low systemic absorption at very high doses, which results in the excess substance being excreted via the gastrointestinal tract. Consequently, severe systemic toxicity or life-threatening symptoms are generally considered unlikely from acute overdose alone. In controlled non-lethal toxicity studies in animals, other symptoms observed included vomiting and salivation.

Emergency Actions and Required Management

Action/Concept Regulatory Statement
Immediate Medical Help Must be sought for any suspected overdose. Contact a Poison Control Center or call emergency services immediately if the person has collapsed, has a seizure, or is experiencing trouble breathing.
Antidote No specific antidote is known for Ursodiol overdose.
Management Treatment is strictly symptomatic and supportive, primarily focused on managing the gastrointestinal effects like diarrhea.

Regulatory guidance consistently defines the overdose profile by its low acute systemic risk, which necessitates a management approach focused on supportive care. Seeking immediate medical attention is the mandatory action for all potential overdose scenarios.

Advertisements

Therapeutic Uses of Ursosan (Ursodiol)

Quick Facts on Ursosan (Ursodiol)

  • Primary therapeutic domains: Management of primary biliary cholangitis (PBC) and dissolution of certain gallstones.
  • Specific use in gallstones: Used for dissolving small, non-calcified cholesterol gallstones in patients who may not be suitable candidates for surgery.
  • Prevention: May be used to prevent gallstone formation in individuals experiencing rapid weight loss.

Ursodiol is a treatment for the management of Primary Biliary Cholangitis (PBC), a chronic liver condition. In patients with PBC, this medication helps to support liver function and may delay disease progression. It is a therapeutic option that may contribute to improvement in certain biomarkers associated with the condition.

Furthermore, Ursodiol is a prescribed medication utilized in the dissolution of cholesterol-based gallstones. This therapeutic use is generally considered for patients with small, non-calcified stones who either choose an alternative to surgical intervention or have existing medical risks that make surgery unfavorable. It may also be prescribed for the prevention of new gallstone formation, particularly in obese patients undergoing rapid weight reduction programs. Individuals should consult with their healthcare team to determine if this treatment approach is appropriate for their specific condition.

Advertisements

Eligibility and Restrictions for Use

Ursosan (Ursodiol) eligibility is strictly defined by regulatory documents, focusing on the patient's existing clinical state and specific population group.

Populations for Whom Use is Contraindicated

Use is contraindicated in patients with a blocked biliary tract, acute inflammation of the gallbladder or bile ducts (cholecystitis/cholangitis), frequent biliary colic, and decompensated hepatic cirrhosis (severe liver failure). The medicine must not be used to treat radio-opaque (calcified) gallstones or if the gallbladder’s contractility is impaired.

Age-Related and Conditional Eligibility

Population Group Regulatory Status
Adults (PBC/Gallstones) Use is established and permitted.
Pediatric (General) Safety and effectiveness have not been established by the FDA for general use.
Pediatric (Cystic Fibrosis) Established for hepatobiliary disorders associated with CF in children (aged 6–18 in many regions).
Pregnancy Not recommended or must not be used during pregnancy unless deemed absolutely necessary.

For patients of childbearing potential receiving the drug for gallstone dissolution, effective non-hormonal contraception is required, as hormonal methods may counteract treatment effectiveness. Liver function tests must be monitored during the initial phases of therapy for patients with Primary Biliary Cholangitis.

Advertisements

What should I know about interactions with other medicines?

Interactions with other medicines and products

Ursodiol's official interaction profile is structured around three primary domains: reduced intestinal absorption of the medicine, pharmacodynamic counteraction, and altered exposure of co-administered drugs. This information is derived exclusively from regulatory prescribing documents.

Interactions that Reduce Ursodiol Absorption/Efficacy

Interacting Substance/Class Effect Description
Bile Acid Sequestering Agents (e.g., Cholestyramine, Colestipol) Bind Ursodiol in the intestine, inhibiting its absorption and efficacy [1.1].
Aluminum-based Antacids (e.g., Aluminum Hydroxide, Smectite) Adsorb bile acids in vitro and are expected to interfere with Ursodiol's action by reducing its absorption [1.4].

Interactions that Counteract Efficacy

Co-administration with agents that increase the cholesterol content of bile is documented as counteracting Ursodiol's effect when used for gallstone dissolution.

  • Oestrogenic Hormones (including certain Oral Contraceptives) and Blood Cholesterol Lowering Agents (e.g., Clofibrate) increase hepatic cholesterol secretion, which directly antagonizes the medicine's therapeutic purpose [1.4].

Timing and Procedural Constraints

  • Adsorbent preparations, including bile acid sequestering agents and aluminum-based antacids, must be administered at least 2 hours before or after Ursodiol to minimize interference with absorption [1.1].
  • Ursodiol can increase the intestinal absorption of Ciclosporin, necessitating blood concentration monitoring and potential dose adjustment [1.3].
  • The use of hormonal contraceptives is restricted in female patients taking Ursodiol for gallstone dissolution due to the risk of antagonism, requiring the use of non-hormonal contraceptive methods [3.1].

Altered Exposure of Other Drugs

Ursodiol may alter the concentration of certain co-administered drugs. For instance, co-administration with Nitrendipine has been shown to reduce its plasma concentration ( C max and AUC), which may necessitate close monitoring and dose adjustment [1.3]. Controlled clinical trials have concluded that Ursodiol does not have a relevant inductive effect on CYP3A enzymes [1.3].

Advertisements

Mechanism of Action

Cholesterol Solubilization and Bile Saturation Modulation

Ursodiol is a hydrophilic bile acid that is absorbed in the small intestine and incorporated into the enterohepatic circulation. This process decreases the cholesterol saturation index of bile, which inhibits the crystallization of cholesterol.

Hepatocyte Membrane Stabilization

Ursodiol modifies the overall composition of the bile acid pool, displacing the more toxic, hydrophobic bile acids. By incorporating into the hepatocyte cell membrane, Ursodiol alters membrane fluidity and stabilizes the structure. This results in less exposure of hepatocytes to cytotoxic bile acid concentrations.

Intestinal Cholesterol Absorption Inhibition

Ursodiol is also a competitive inhibitor of cholesterol absorption in the intestine. This inhibition mechanism further contributes to the reduction of cholesterol content in bile.

Advertisements

Dosage and Administration Information

How to Use Ursosan (Ursodiol)

Ursodiol is a prescription bile acid preparation administered exclusively via the oral route as capsules, tablets, or an oral suspension. The administration protocol focuses on patient weight, frequency, and timing relative to food.

Dosing and Administration Principles

Feature Guideline
Dosing Range The dose is weight-based, commonly prescribed between 8 to 15 mg/ kg/ day (milligrams per kilogram per day). For Primary Biliary Cholangitis (PBC), the usual range is 13–15 mg/ kg/ day.
Frequency The total daily amount must be taken in divided doses, typically two to four times daily, rather than a single daily administration.
Administration Timing Ingestion must occur with food or milk to optimize the absorption of the active ingredient.
Course Duration Treatment for PBC is generally considered long-term. For gallstone dissolution, a continuous, extended course of up to two years or more may be required, persisting for several months after stone clearance.

Procedural Context and Special Instructions

The medication is to be swallowed whole with liquid. Tablets that are scored may be broken to achieve the precise dose but must not be chewed. Pediatric patients often require dosing calculated based on their weight for specific uses, such as 20 mg/ kg/ day in divided doses. If a dose is missed, it should be taken when remembered unless it is almost time for the next scheduled dose, in which case the user should simply resume the regular schedule. These instructions collectively define the procedural approach for using the medication.

Advertisements

Recent Clinical Evidence

Ursosan (Ursodiol): Recent Clinical Evidence

Clinical research examining ursodeoxycholic acid (UDCA), the active ingredient in Ursosan, primarily focuses on chronic cholestatic liver diseases and the dissolution of certain gallstones.

Primary Biliary Cholangitis (PBC)

UDCA is considered the cornerstone of first-line treatment for Primary Biliary Cholangitis (PBC), a chronic liver disease. Long-term studies indicate that initiating UDCA therapy is associated with a change in the natural course of the disease. Specifically, research suggests its use may be linked to delayed disease progression, a reduced need for liver transplantation, and improved transplant-free survival in patients classified as treatment responders.

Gallstone Dissolution and Prevention

UDCA's role in gallstone management is restricted to certain types of gallstones, typically those made primarily of cholesterol, in patients where surgery (cholecystectomy) is not the preferred option. Clinical trials have explored the drug’s potential to reduce cholesterol saturation in bile, which is necessary for gallstone dissolution. The effectiveness of this therapy is dependent on stone size, stone composition, and the functionality of the gallbladder.

Areas of Ongoing Investigation

Research is continuously evaluating the potential application of UDCA in other areas of liver health, including:

  • Intrahepatic Cholestasis of Pregnancy (ICP): Studies are examining whether UDCA treatment influences fetal outcomes and maternal symptoms (like itching) in pregnant patients with elevated bile acid levels.
  • Drug-Induced Liver Injury (DILI): Limited clinical data, alongside preclinical models, suggests research is exploring UDCA for its possible protective effects on liver cells in cases of liver injury resulting from certain medications.

Key Studies & References

  1. Ursodeoxycholic acid therapy in drug-induced liver injury: a literature review
Advertisements

Frequently Asked Questions (FAQ)

Common questions about Ursosan (Ursodiol) (FAQ)


Q: Are there known long-term side effects from taking Ursodiol for several years?

Official regulatory documents note that two very rare and serious effects have been reported during long-term treatment. These include the calcification of gallstones, which can occur during dissolution therapy, and decompensation of hepatic cirrhosis (a worsening of severe liver failure) in advanced patients; cessation has been associated with regression.


Q: Is Ursodiol a cure for Primary Biliary Cholangitis (PBC), or does it help manage the condition?

Ursodiol is indicated as a cornerstone treatment to manage Primary Biliary Cholangitis (PBC). Official product information describes its purpose as improving liver function test results and helping to delay the progression of the disease over time. Its purpose is focused on long-term management and delay of disease progression, as it is not curative.


Q: What is the difference between brand-name Ursosan and generic Ursodiol?

Brand-name products like Ursosan and generic versions of Ursodiol contain the same active ingredient and meet the same strict governmental standards for quality and purity. Official guidelines require generic products to demonstrate bioequivalence, meaning they meet the same regulatory standards for bioequivalence.


Q: What are the storage requirements for Ursodiol, especially for compounded liquid forms?

The manufacturer's instructions for commercially prepared forms of Ursodiol (tablets, capsules, and suspensions) state they should be stored at room temperature and protected from excess heat, moisture, and light. If a product has been custom-made (compounded) into a liquid, instructions for its stability and storage are typically provided by the compounding pharmacist who prepared it.


Q: Have any studies examined if Ursodiol can cause hair loss or thinning?

Yes, hair loss, medically referred to as alopecia, has been reported as an adverse event in clinical trials of Ursodiol. It is listed in official labeling under side effects affecting the skin and its appendages.


Q: What are the signs of a serious or rare allergic reaction to Ursodiol?

Signs of a severe allergic reaction may include difficulty breathing or wheezing, swelling of the face, lips, tongue, or throat, hives, or a severe rash. If these symptoms occur, regulatory documents indicate that immediate medical attention is required.


Q: Does Ursodiol commonly cause headaches or dizziness?

In clinical studies examining the use of Ursodiol, both headache and dizziness were reported as common adverse events affecting the nervous system. Patients should be aware that these effects have occurred during treatment.


Q: Is there information about Ursodiol causing changes in body weight?

Official documentation reports that unusual changes in body weight, which include both weight gain and weight loss, have been observed. However, the exact frequency of these occurrences is currently not known based on the documentation.


Q: Is Ursodiol generally appropriate for use in the elderly population?

Regulatory documents state that based on current evidence, no alteration to the standard adult dose is typically required for use in the elderly population. Treatment decisions in older patients are based on overall health considerations.


Q: Is Ursodiol appropriate for use by patients who have Crohn’s disease or ulcerative colitis?

Official prescribing information includes a precaution that patients with certain intestinal problems, such as Crohn’s disease, or those who have had specific intestinal surgeries may have a higher risk of intestinal blockage when taking Ursodiol. This is a factor that may be noted in official prescribing information regarding eligibility.


Q: How long does it typically take for Ursosan to start affecting liver enzyme levels?

The official monitoring protocol requires that liver function tests be checked every month for the first three months of therapy. This schedule is in place because this period is when initial therapeutic changes or adverse effects on liver function are expected to be detected.


Q: Is there information available on using Ursodiol while breastfeeding?

According to official regulatory labeling, it is not known whether Ursodiol is excreted into human breast milk. As a cautionary measure, official information indicates that caution is generally advised when the drug is administered to a patient who is breastfeeding.


Q: Is it possible for the inactive ingredients in Ursodiol products to cause side effects?

The product is contraindicated (must not be used) in patients who have a known hypersensitivity or intolerance not only to the active substance (Ursodiol) but also to any of the components of the formulation, which includes inactive ingredients.


Q: What is known about the half-life of Ursodiol in the body?

Pharmacokinetic data available in official product information states that the estimated half-life for Ursodiol in the body ranges from approximately 3.5 to 5.8 days.

Advertisements

How should Ursosan (Ursodiol) be stored and disposed of?

How to Store and Dispose of Ursosan (Ursodiol)?

Official regulatory guidelines strictly define the conditions necessary to store and dispose of Ursodiol safely and effectively.

Storage Requirements

Condition Requirement
Temperature Store at room temperature, typically below 25 C or not exceeding 30 C.
Protection Keep the medication in its original, tightly closed container and protect it from excess heat, moisture, and light. Do not store in damp areas like bathrooms, and do not freeze.
Stability Any broken half-tablets (from scored forms) must be used within 28 days of breaking.
Safety It is mandatory to keep Ursosan out of the sight and reach of children at all times.

Disposal Instructions

Unused or expired Ursodiol must be disposed of in accordance with local requirements. Official instructions mandate that the medicine must not be discarded via household trash or by flushing down the wastewater system. Instead, the product should be returned to a pharmacy or a designated drug take-back program.

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

Available in countries:

Equivalent of Ursosan (Ursodiol) found in:

A-Z Index: