Stability of ursodiol 25 mg/mL in an extemporaneously prepared oral liquid

Am J Health Syst Pharm. 1997 Jun 15;54(12):1401-4. doi: 10.1093/ajhp/54.12.1401.


The stability of ursodiol in an extemporaneously formulated oral liquid was studied. A suspension was prepared by combining the contents of commercially available 300-mg capsules of ursodiol with glycerin, Ora-Plus (Paddock Laboratories), and orange syrup. A second formulation was prepared by combining ursodiol capsules with sterile water for irrigation. The final concentration of ursodiol in each formulation was 25 mg/mL. Six samples of each preparation were stored in 4-oz amber plastic prescription bottles protected from light. Three were stored at 22-23 degrees C and three were refrigerated at 2-6 degrees C. Immediately after preparation and at 7, 15, 30, 45, and 60 days, samples were obtained and frozen until assay by high-performance liquid chromatography. On day 60 the mean percentage of the initial ursodiol concentration remaining was 108.4% for the suspension stored at room temperature and 103.3% for the refrigerated suspension. The ursodiolin-water formulation was not analyzed because of rapid settling of ursodiol. Ursodiol 25 mg/mL in an oral liquid prepared extemporaneously from capsules and sweetened vehicle was stable for 60 days when stored in amber plastic bottles at 22-23 and 2-6 degrees C. Addition of ursodiol powder to water without a suspending agent resulted in a liquid formulation with a high variability in content uniformity.

Publication types

  • Research Support, U.S. Gov't, Non-P.H.S.

MeSH terms

  • Cholagogues and Choleretics / administration & dosage
  • Cholagogues and Choleretics / chemistry*
  • Chromatography, High Pressure Liquid
  • Drug Compounding
  • Drug Stability
  • Drug Storage
  • Flavoring Agents
  • Preservatives, Pharmaceutical
  • Suspensions
  • Ursodeoxycholic Acid / administration & dosage
  • Ursodeoxycholic Acid / chemistry*


  • Cholagogues and Choleretics
  • Flavoring Agents
  • Preservatives, Pharmaceutical
  • Suspensions
  • Ursodeoxycholic Acid