Urso Information
Urso (Ursodiol) Description
Urso (Ursodiol) 250 (Urso (Ursodiol) diol, 250 mg) is available as a film-coated tablet for oral administration. Urso (Ursodiol) Forte(Urso (Ursodiol) diol, 500 mg) is available as a scored film-coated tablet for oral administration.
Urso (Ursodiol) diol (Urso (Ursodiol) deoxycholic acid, UDCA) is a naturally occurring bile acid found in small quantities in normal human bile and in larger quantities in the biles of certain species of bears. It is a bitter-tasting white powder consisting of crystalline particles freely soluble in ethanol and glacial acetic acid, slightly soluble in chloroform, sparingly soluble in ether, and practically insoluble in water. The chemical name of Urso (Ursodiol) diol is 3α,7ß-dihydroxy-5ß-cholan-24-oic (C H O). Urso (Ursodiol) diol has a molecular weight of 392.56. Its structure is shown below.
Inactive ingredients: microcrystalline cellulose, povidone, sodium starch glycolate, magnesium stearate, ethylcellulose, dibutyl sebacate, carnauba wax, hydroxypropyl methylcellulose, PEG 3350, PEG 8000, cetyl alcohol, sodium lauryl sulfate and hydrogen peroxide.
Urso (Ursodiol) Clinical Pharmacology
Urso (Ursodiol) diol (UDCA) is normally present as a minor fraction of the total bile acids in humans (about 5%). Following oral administration, the majority of Urso (Ursodiol) diol is absorbed by passive diffusion and its absorption is incomplete. Once absorbed, Urso (Ursodiol) diol undergoes hepatic extraction to the extent of about 50% in the absence of liver disease. As the severity of liver disease increases, the extent of extraction decreases. In the liver, Urso (Ursodiol) diol is conjugated with glycine or taurine, then secreted into bile. These conjugates of Urso (Ursodiol) diol are absorbed in the small intestine by passive and active mechanisms. The conjugates can also be deconjugated in the ileum by intestinal enzymes, leading to the formation of free Urso (Ursodiol) diol that can be reabsorbed and reconjugated in the liver. Nonabsorbed Urso (Ursodiol) diol passes into the colon where it is mostly 7-dehydroxylated to lithocholic acid. Some Urso (Ursodiol) diol is epimerized to chenodiol (CDCA) via a 7-oxo intermediate. Chenodiol also undergoes 7-dehydroxylation to form lithocholic acid. These metabolites are poorly soluble and excreted in the feces. A small portion of lithocholic acid is reabsorbed, conjugated in the liver with glycine, or taurine and sulfated at the 3 position. The resulting sulfated lithocholic acid conjugates are excreted in bile and then lost in feces.
Lithocholic acid, when administered chronically to animals, causes cholestatic liver injury that may lead to death from liver failure in certain species unable to form sulfate conjugates. Urso (Ursodiol) diol is 7-dehydroxylated more slowly than chenodiol. For equimolar doses of Urso (Ursodiol) diol and chenodiol, steady state levels of lithocholic acid in biliary bile acids are lower during Urso (Ursodiol) diol administration than with chenodiol administration. Humans and chimpanzees can sulfate lithocholic acid. Although liver injury has not been associated with Urso (Ursodiol) diol therapy, a reduced capacity to sulfate may exist in some individuals. Nonetheless, such a deficiency has not yet been clearly demonstrated and must be extremely rare, given the several thousand patient-years of clinical experience with Urso (Ursodiol) diol.
In healthy subjects, at least 70% of Urso (Ursodiol) diol (unconjugated) is bound to plasma protein. No information is available on the binding of conjugated Urso (Ursodiol) diol to plasma protein in healthy subjects or primary biliary cirrhosis (PBC) patients. Its volume of distribution has not been determined, but is expected to be small since the drug is mostly distributed in the bile and small intestine. Urso (Ursodiol) diol is excreted primarily in the feces. With treatment, urinary excretion increases, but remains less than 1% except in severe cholestatic liver disease.
During chronic administration of Urso (Ursodiol) diol, it becomes a major biliary and plasma bile acid. At a chronic dose of 13 to 15 mg/kg/day, Urso (Ursodiol) diol constitutes 30-50% of biliary and plasma bile acids.
Urso (Ursodiol) Clinical Studies
A U.S., multicenter, randomized, double-blind, placebo-controlled study was conducted to evaluate the efficacy of Urso (Ursodiol) deoxycholic acid at a dose of 13 to 15 mg/kg/day, administered in 3 or 4 divided doses in 180 patients with PBC (78% received QID dosage). Upon completion of the double-blind portion, all patients entered an open-label active treatment extension phase.
Treatment failure, the main efficacy end point measured during this study, was defined as death, need for liver transplantation, histologic progression by two stages or to cirrhosis, development of varices, ascites or encephalopathy, marked worsening of fatigue or pruritus, inability to tolerate the drug, doubling of serum bilirubin and voluntary withdrawal. After two years of double-blind treatment, the incidence of treatment failure was significantly reduced in the Urso (Ursodiol) 250 group (n=89) as compared to the placebo group (n=91). Time to treatment failure was also significantly delayed in the Urso (Ursodiol) 250 treated group regardless of either histologic stage or baseline bilirubin levels (>1.8 or ≤1.8 mg/dl).
Using a definition of treatment failure which excluded doubling of serum bilirubin and voluntary withdrawal, time to treatment failure was significantly delayed in the Urso (Ursodiol) 250 group. In comparison with placebo, treatment with Urso (Ursodiol) 250 resulted in a significant improvement in the following serum hepatic biochemistries when compared to baseline: total bilirubin, SGOT, alkaline phosphatase and IgM.
A second study conducted in Canada randomized 222 PBC patients to Urso (Ursodiol) diol, 14 mg/kg/day or placebo, administered as a once daily dose in a double-blind manner during a two-year period. At two years, a statistically significant difference between the two treatments, in favor of Urso (Ursodiol) diol, was demonstrated in the following: reduction in the proportion of patients exhibiting a more than 50% increase in serum bilirubin; median percent decrease in bilirubin, transaminases and alkaline phosphatase; incidence of treatment failure; and time to treatment failure. The definition of treatment failure included: discontinuing the study for any reason; a total serum bilirubin level greater than or equal to 1.5 mg/dl or increasing to a level equal to or greater than two times the baseline level; and the development of ascites or encephalopathy. Evaluation of patients at 4 years or longer was inadequate due to the high drop out rate and small number of patients. Therefore, death, need for liver transplantation, histological progression by two stages or to cirrhosis, development of varices, ascites or encephalopathy, marked worsening of fatigue or pruritus, inability to tolerate the drug, doubling of serum bilirubin and voluntary withdrawal were not assessed.
A randomized, two-period crossover study in fifty PBC patients compared efficacy of Urso (Ursodiol) 250 (Urso (Ursodiol) diol) in BID (two) versus QID (four) divided dosing schedules in 50 patients for 6 months in each crossover period. Mean percent changes from baseline in liver test results and Mayo risk score (n=46) and serum enrichment with UDCA (n=34) were not statistically significant with any dosage at any time interval. This study demonstrated that UDCA (13 to 15 mg/kg/day) given BID is equally effective to UDCA given QID. In addition, Urso (Ursodiol) 250 was given as a single (once daily) versus TID (three) dosing schedules in 10 patients. Due to the small number of patients in this arm of the study, it was not possible to conduct statistical comparisons between these regimens.
Urso (Ursodiol) Indications And Usage
Urso (Ursodiol) 250 and Urso (Ursodiol) Forte (Urso (Ursodiol) diol) tablets are indicated for the treatment of patients with primary biliary cirrhosis.
Urso (Ursodiol) Contraindications
Hypersensitivity or intolerance to Urso (Ursodiol) diol or any of the components of the formulation.
Urso (Ursodiol) Precautions
Patients with variceal bleeding, hepatic encephalopathy, ascites or in need of an urgent liver transplant, should receive appropriate specific treatment.
In two 24-month oral carcinogenicity studies in mice, Urso (Ursodiol) diol at doses up to 1,000 mg/kg/day (3,000 mg/m/day) was not tumorigenic. Based on body surface area, for a 50 kg person of average height (1.46 m body surface area), this dose represents 5.4 times the recommended maximum clinical dose of 15 mg/kg/day (555 mg/m/day).
In a two-year oral carcinogenicity study in Fischer 344 rats, Urso (Ursodiol) diol at doses up to 300 mg/kg/day (1,800 mg/m/day, 3.2 times the recommended maximum human dose based on body surface area) was not tumorigenic.
In a life-span (126-138 weeks) oral carcinogenicity study, Sprague-Dawley rats were treated with doses of 33 to 300 mg/kg/day, 0.4 to 3.2 times the recommended maximum human dose based on body surface area. Urso (Ursodiol) diol produced a significantly (p≤0.5, Fisher's exact test) increased incidence of pheochromocytomas of the adrenal medulla in females of the highest dose group.
In 103-week oral carcinogenicity studies of lithocholic acid, a metabolite of Urso (Ursodiol) diol, doses up to 250 mg/kg/day in mice and 500 mg/kg/day in rats did not produce any tumors. In a 78-week rat study, intrarectal instillation of lithocholic acid (1 mg/kg/day) for 13 months did not produce colorectal tumors. A tumor-promoting effect was observed when it was administered after a single intrarectal dose of a known carcinogen N-methyl-N'-nitro-N-nitrosoguanidine. On the other hand, in a 32-week rat study, Urso (Ursodiol) diol at a daily dose of 240 mg/kg (1,440 mg/m, 2.6 times the maximum recommended human dose based on body surface area) suppressed the colonic carcinogenic effect of another known carcinogen azoxymethane.
Urso (Ursodiol) diol was not genotoxic in the Ames test, the mouse lymphoma cell (L5178Y, TK) forward mutation test, the human lymphocyte sister chromatid exchange test, the mouse spermatogonia chromosome aberration test, the Chinese hamster micronucleus test and the Chinese hamster bone marrow cell chromosome aberration test.
Urso (Ursodiol) diol at oral doses of up to 2,700 mg/kg/day (16,200 mg/m/day, 29 times the recommended maximum human dose based on body surface area) was found to have no effect on fertility and reproductive performance of male and female rats.
Teratology studies have been performed in pregnant rats at oral doses up to 2,000 mg/kg/day (12,000 mg/m/day, 22 times the recommended maximum human dose based on body surface area) and in pregnant rabbits at oral doses up to 300 mg/kg/day (3,600 mg/m/day, 7 times the recommended maximum human dose based on body surface area) and have revealed no evidence of impaired fertility or harm to the fetus due to Urso (Ursodiol) diol.
There are no adequate or well-controlled studies in pregnant women. Because animal reproduction studies are not always predictive of human response, this drug should be used during pregnancy only if clearly needed.
Urso (Ursodiol) Adverse Events (aes)
The following table summarizes the AEs observed in the two placebo-controlled clinical trials.
Note: Those AEs occurring at the same or higher incidence in the placebo as in the UDCA group have been deleted from this table (this includes diarrhea and thrombocytopenia at 12 months, nausea/ vomiting, fever and other toxicity).UDCA = Urso (Ursodiol) deoxycholic acid = Urso (Ursodiol) diol
In a randomized, cross-over study in sixty PBC patients, four patients (6.7%) experienced one serious adverse event each (diabetes mellitus, cyst and breast neoplasm (experienced by two patients)). No deaths occurred in the study. Forty-three patients (43, 71.7%) experienced at least one treatment-emergent adverse event (TEAEs) during the study. The most common (>5%) TEAEs were asthenia (11.7%), dyspepsia (10%), peripheral edema (8.3%), hypertension (8.3%), nausea (8.3%), GI disorders (5%), chest pain (5%), and pruritus (5%). Seven patients (11.6%) reported nine events that were judged as possibly or probably related to study medication. These nine TEAEs included abdominal pain and asthenia (1 patient), nausea (3 patients), dyspepsia (2 patients) and anorexia and esophagitis (1 patient each). One patient on the BID regimen (total dose 1000 mg) withdrew due to nausea. All of these nine TEAEs except esophagitis were observed with the BID regimen at a total daily dose of 1000 mg or greater.
Urso (Ursodiol) Overdose
Accidental or intentional overdosage with Urso (Ursodiol) diol has not been reported. The most severe manifestation of overdosage would likely consist of diarrhea which should be treated symptomatically.
Single oral doses of Urso (Ursodiol) diol at 10, 5 and 10 g/kg in mice, rats and dogs, respectively, were not lethal. A single oral dose of Urso (Ursodiol) diol at 1.5 g/kg was lethal in hamsters. Symptoms of acute toxicity were salivation and vomiting in dogs, and ataxia, dyspnea, ptosis, agonal convulsions and coma in hamsters.
Urso (Ursodiol) Dosage And Administration
The recommended adult dosage for Urso (Ursodiol) 250 and Urso (Ursodiol) Forte in the treatment of PBC is 13-15 mg/kg/day administered in two to four divided doses with food. Dosing regimen should be adjusted according to each patient's need at the discretion of the physician.
The Urso (Ursodiol) Forte scored tablet can be broken in halves to provide recommended dosage.
To break Urso (Ursodiol) Forte scored tablet easily, place the tablet on a flat surface with the scored section on top. Hold the tablet with your thumbs placed close to the scored part of the tablet (groove). Then apply gentle pressure and snap the tablet segments apart (segments breaking incorrectly should not be used). The segments should be washed down unchewed, with water, keeping the segments in the mouth can reveal a bitter taste. Due to the bitter taste, segments should be stored separately.
Half-tablets (scored Urso (Ursodiol) Forte 500 mg tablets broken in half) maintain acceptable quality for up to 28 days when stored in the current packaging (bottles) at 25C (77F).
Urso (Ursodiol) How Supplied
Each Urso (Ursodiol) 250 elliptical, biconvex, film-coated tablet, white, engraved with "URS785", contains 250 mg of Urso (Ursodiol) diol. Available in bottles of 100 tablets (NDC 58914-785-10) and 500 tablets (NDC 58914-785-50).
Each Urso (Ursodiol) Forte elliptical, biconvex, scored, film-coated tablet, white, engraved with "URS790", contains 500 mg of Urso (Ursodiol) diol. Available in bottles of 100 tablets (NDC 58914-790-10) and 500 tablets (NDC 58914-790-50).
Store at 20C to 25C (68F to 77F). Dispense in a tight container.
Urso (Ursodiol) 250 and Urso (Ursodiol) Forte are registered trademarks used under license by Axcan Scandipharm Inc. Revision date: March 10, 2008 Printed in Canada.
Urso (Ursodiol) 250® is available from Cardinal
Health in unit dose packages of 100
tablets, NDC 55154-1855-4.
Cardinal Health
Zanesville OH 43701
I22370709
Urso (Ursodiol) Principal Display Panel-carton
NDC: 55154-1855-4
Urso (Ursodiol) 250
(Usodiol Tablets, USP)
250 mg
100 Tablets
Each tablet contains 250 mg of Urso (Ursodiol) diol.
See product insert for full prescribing information, precautions and warnings.
RECOMMENDED ADULT DOSAGE: 13-15 mg/kg/day in two to four divided doses with food.
STORAGE: Store at 20°C-25°C (68°-77°F).
Dispense in a tight container.
RX ONLY
WARNING: This package is intended for institutional use only. This package is not child resistant. Keep this and all drugs out of the reach of children.
See window for lot number and expiration date.
Urso (Ursodiol) 250® and the Axcan Pharma logo are registered trademarks and trademarks used under license by Axcan Pharma US, Inc.
For product information please call 1-800-742-6706.
Manufactured in Canada for: Axcan Pharma US, Inc.
22 Inverness Center Parkway
Birmingham, AL 35242 USA
Repackaged by: Cardinal Health Zanesville, OH 43701
LUC40285770610
Urso (Ursodiol) Principal Display Panel-pouch
Urso (Ursodiol) 250
(Urso (Ursodiol) diol Tablet, USP)
250 mg
Urso (Ursodiol) Principal Display Panel - Bag
Urso (Ursodiol) 250
Urso (Ursodiol) diol Tablets, USP
250 mg
10 Tablets
