Effect of drying methods on retention of moist sucralfate gel properties

AAPS PharmSciTech. 2000 Sep 22;1(3):E26. doi: 10.1208/pt010326.

Abstract

The aim of this work was to find a drying procedure for moist sucralfate gel capable of producing dried sucralfate gel that retains the original gel properties of bioadhesion, rheology, and micromeritics. Spray-drying and microwave-drying procedures were employed. Mannitol was used as a gel-protective substance during the drying processes. The spray drying of moist sucralfate gel gave rise to a powder whose water suspensions showed significantly reduced viscosity. The bioadhesion of spray-dried sucralfate gel was strongly reduced by drying. When mannitol was used as a gel protector, the spray-dried sucralfate in part maintained the original bioadhesion of moist sucralfate gel. The preparation of a dried sucralfate gel retaining the bioadhesion characteristics, avoiding the use of mannitol, was made possible using the microwave-drying procedure. The microwave-dried product possesses a granular morphology suitable for direct compression because it is a free flowing and strongly coherent granular powder.

MeSH terms

  • Acid-Base Equilibrium
  • Animals
  • Colloids / chemistry
  • Desiccation / methods*
  • Gastric Mucosa / chemistry
  • Gastric Mucosa / metabolism
  • Gels / chemistry*
  • Gels / metabolism
  • Rheology / methods
  • Sucralfate / chemistry*
  • Sucralfate / metabolism
  • Suspensions
  • Swine
  • Tissue Adhesions / metabolism
  • Water / chemistry*

Substances

  • Colloids
  • Gels
  • Suspensions
  • Water
  • Sucralfate