Degradation of Omeprazole Induced by Enteric Polymer Solutions and Aqueous Dispersions: HPLC Investigations

References

• Bodmeier, R., & Chen, H. (1991). Determination of the acidic degradation products, acetic, propionic, butyric, and phthalic acid in aqueous pseudolatexes of cellulosic esters by high performance liquid chromatography. Drug Development and Industrial Pharmacy, 17:1811–1822.
   Web of Science ®Google Scholar
• Brändström, A., Lindberg, P., Bergman, N.-K., Alminger, T., & Junggren, U. C. (1989). Chemical reactions of omeprazole and omeprazole analogues. I. A survey of the chemical transformation of omeprazole and its analogues. Acta Chemica Scandinavica, 43:536–548.
   Google Scholar
• Chambliss, W. G. (1987). The forgotten dosage form: enteric coating tablets. Pharmaceutical Technology, 7:124–140.
   Google Scholar
• Chen, C.-M., Chou, J., & Weng, T. Omeprazole Formulation. US Patent 6,096,340, Nov. 14, 1997.
   Google Scholar
• Clissold, S. P., & Campoli-Richards, D. M. (1986). Omeprazole—a preliminary review of its pharmacodynamic and pharmacokinetic properties, and therapeutic potential in peptic ulcer disease and Zollinger-Ellison syndrome. Drugs, 32:15–47., [PUBMED], [INFOTRIEVE]
   PubMed Web of Science ®Google Scholar
• Davidson, A. G., & McCallum, A. (1996). A survey of the stability of omeprazole products from 13 countries. Drug Development and Industrial Pharmacy, 22:1173–1185.
   Web of Science ®Google Scholar
• Davis, M. B. (1986). Preparation and stability of aqueous-based enteric polymer dispersions. Drug Development and Industrial Pharmacy, 12:1419–1448.
   Web of Science ®Google Scholar
• Ekpe, A., & Jacobsen, T. (1999). Effect of various salts on the stability of lansoprazole, omeprazole, and pantoprazole as determined by high-performance liquid chromatography. Drug Development and Industrial Pharmacy, 25:1057–1065., [PUBMED], [INFOTRIEVE], [CSA]
   PubMed Web of Science ®Google Scholar
• Erickson, M., & Josefson, L. Pharmaceutical Formulation of Omeprazole. US Patent 6,090,827, May 18, 1998.
   Google Scholar
• Gordon, M. S., Fratis, A., Goldblum, R., Jung, D., Schwartz, K. E., & Chowhan, Z. T. (1995). In vivo and in vitro evaluation of four different aqueous polymeric dispersions for producing an enteric coated tablet. International Journal of Pharmaceutics, 115:29–34.
   Web of Science ®Google Scholar
• Goskonda, S. R., & Lee, J. C. (2000). Hydroxypropyl methylcellulose phthalate. In: Kibbe, A. H., (Ed.). Handbook of Pharmaceutical Excipients(3rd Ed.). Washington: American Pharmaceutical Association, pp. 256–260
   Google Scholar
• Hamdan, I. I. (2001). In vitro study of the interaction between omeprazole and the metal ions Zn(II), Cu(II), and Co(II). Pharmazie, 56:877–881., [PUBMED], [INFOTRIEVE]
   PubMed Web of Science ®Google Scholar
• Lagerström, P.-O., & Persson, B.-A. (1984). Determination of omeprazole and metabolites in plasma and urine by liquid chromatography. Journal of Chromatography Biomedical Applications, 309:347–356.
   PubMed Web of Science ®Google Scholar
• Lee, F.-Y., Chen, S.-C., & Kuo, H.-C. Orally Administered Pharmaceutical Formulations of Benzimidazole Derivatives and the Method of Preparing the Same. US Patent 6,228,400 B1, Jan. 19, 2000.
   Google Scholar
• Lövgren, K. I., Pilbrant, A. G., Yasumura, M., Morigaki, S., Oda, M., & Ohishi, N. New Pharmaceutical Preparation for Oral Use. EP Patent 0 2479 83 B 1, Apr. 16, 1987.
   Google Scholar
• Lundberg, P. J., & Lövgren, K, New Pharmaceutical Formulation and Process. WO Patent 96/24338, Feb. 9, 1996.
   Google Scholar
• Mathew, M., Das Gupta, V., & Bailey, R. E. (1995), Stability of omeprazole solutions at various pH values as determined by high-performance liquid chromatography. Drug Development and Industrial Pharmacy, 21:965–971.
   Web of Science ®Google Scholar
• Münzel, K., Büchi, J., & Schultz, D.-E. (1959). 6. Übung: Demineralisiertes und destilliertes Wasser. In: Galenisches Praktikum. Wissenschaftliche Verlagsgesellschaft mbH: Stuttgart, p. 196.
   Google Scholar
• Parke, T. V., & Davis, W. W. (1954). Use of apparent dissociation constants in qualitative organic analysis. Analytical Chemistry, 26:642–645.
   Web of Science ®Google Scholar
• Persson, B.-A., Lagerström, P.-O., & Grundevik, I. (1985). Determination of omeprazole and metabolites in plasma and urine. Scandinavian Journal of Gastroenterology, 20:71–77.
   Web of Science ®Google Scholar
• Pilbrant, A. (1985). Development of an oral formulation of omeprazole. Scandinavian Journal of Gastroenterology, 20:113–119.
   Web of Science ®Google Scholar
• Quercia, R. A., Fan, C., Liu, X., & Chow, M. S. S. (1997). Stability of omeprazole in an extemporaneously prepared oral liquid. American Journal of Health-System Pharmacy, 54:1833–1836., [PUBMED], [INFOTRIEVE], [CSA]
   PubMed Web of Science ®Google Scholar
• Ruiz, M. A., Reyes, I., Parera, A., & Gallardo, V. (2000). Adsorption of omeprazole on latex particles and characterization of the complex. Il Farmaco, 55:314–318., [PUBMED], [INFOTRIEVE]
   PubMedGoogle Scholar
• Schmidt-Mende, T. (2001). Freisetzung aus Magensaftresistent Überzogenen Arzneiformen. Düsseldorf: Heinrich-Heine-Universität.
   Google Scholar
• Senn-Bilfinger, J., Krüger, U., Sturm, E., Figala, V., Klemm, K., Kohl, B., Rainer, G., & Schaefer, H. (1987). (H+− K+)-ATPase inhibiting 2-[(2-Pyridylmethyl)sulfinyl]benzimidazoles. 2. The reaction cascade induced by treatment with acids. Formation of 5H-Pyrido[1′,2′:4,5][1,2,4]thiadiazono[2,3-a]benzimidazol-13-ium salts and their reaction with thiols. Journal of Organic Chemistry, 52:4582–4592.
   Web of Science ®Google Scholar
• Storpirtis, S., & Rodrigues, D. (1998). In vitro evaluation of dissolution properties and degradation products of omeprazole in enteric-coated pellets. Drug Development and Industrial Pharmacy, 24:1101–1107., [PUBMED], [INFOTRIEVE], [CSA]
   PubMed Web of Science ®Google Scholar