The purpose of this work was to develop a new supergeneric product Meloxicam/Omeprazole. Such a combination brings a benefit in terms of decreasing side effects for the patients using meloxicam. The new combination is composed of a meloxicam powder blend (MPB) and omeprazole gastro-resistant pellets (OAP) in hard gelatin capsules. The main tasks were to select the excipients to keep the functional layer of OAP active and to prove the bioequivalence to the original products of meloxicam tablets together with omeprazole capsules. Although dissolution profiles similar to the original product were obtained, the unexpected results of omeprazole low bioavailability in the fed bioequivalence study (BES I) showed the necessity to investigate the formulation in greater depth. A modified more complex dissolution method was developed in order to understand the release of omeprazole under gastric conditions. This method revealed the degradation of omeprazole in the formulation when exposed to the fed conditions because of the increase in microenvironmental pH in the capsule caused by trisodium citrate, commonly used for improving solubility of meloxicam. This pH increase dissolved the gastro-resistant layer of OAP and caused the chemical degradation. To prevent this effect, a trisodium citrate-free formulation was developed. Reformulated capsules passed the repeated fed bioequivalence study (BES II).

• MeSH
• antiflogistika nesteroidní * aplikace a dávkování   chemie   farmakokinetika   MeSH
• chemie farmaceutická MeSH
• citráty chemie   MeSH
• fixní kombinace léků MeSH
• klinické křížové studie MeSH
• koncentrace vodíkových iontů MeSH
• lidé MeSH
• meloxikam MeSH
• omeprazol * aplikace a dávkování   chemie   farmakokinetika   MeSH
• pomocné látky chemie   MeSH
• prášky, zásypy, pudry MeSH
• protivředové látky * aplikace a dávkování   chemie   farmakokinetika   MeSH
• terapeutická ekvivalence MeSH
• thiaziny * aplikace a dávkování   chemie   farmakokinetika   MeSH
• thiazoly * aplikace a dávkování   chemie   farmakokinetika   MeSH
• tobolky MeSH
• uvolňování léčiv MeSH
• želatina chemie   MeSH
• Check Tag
• lidé MeSH
• mužské pohlaví MeSH
• ženské pohlaví MeSH
• Publikační typ
• časopisecké články MeSH
• klinické zkoušky MeSH