Solid-State Properties and Controlled Release of Ranitidine Hydrochloride from Tailored Oxidised Cellulose Beads

Jani Trygg, Emrah Yildir, Ruzica Kolakovic, Niklas Sandler, Pedro Fardim

Research output: Contribution to journalArticleScientificpeer-review

10 Citations (Scopus)


Oxidised cellulose beads (anionic groups 0.1–1.85mmolg1) were loaded with ranitidine HCl. Polymorphic form and crystallinity of the drug was assessed by calorimetric and spectrometric techniques. Release profiles were obtained at physiological conditions and fitted to suitable mathematical models to gain an understanding on release mechanism. Solid-state analysis showed that the drug was solidified in amorphous form. The amount of drug was uniform and increased with charge of the beads upto loading degree of 25.8%. Release profiles fitted well to the Baker-Lonsdale’s model for non-swelling system indicating open structure for freely soluble drug. The release was pH independent, providing fast release already at pH 1.2 in simulated gastrointestinal track.

Original languageUndefined/Unknown
Pages (from-to)210–217
JournalMacromolecular Materials and Engineering
Issue number2
Publication statusPublished - 2015
MoE publication typeA1 Journal article-refereed


  • amorphous drug
  • drug delivery
  • oxidised celluolse beads
  • swelling
  • uniformity of content

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