Related Experiment Video
Updated: Jan 29, 2026

Doxycycline Loaded Collagen-Chitosan Composite Scaffold for the Accelerated Healing of Diabetic Wounds
Published on: August 21, 2021
Design and Evaluation of An Extended-Release Olmesartan Tablet Using Chitosan/Cyclodextrin Composites
Makoto Anraku1,2, Ryo Tabuchi3, Miwa Goto4
1Faculty of Pharmaceutical Sciences, Sojo University, 4-22-1 Ikeda, Nishi-ku, Kumamoto 860-0082, Japan. anraku@ph.sojo-u.ac.jp.
New sustained-release olmesartan tablets, using sulfobutyl ether-β-cyclodextrin and spray-dried chitosan, show promise for hypertension treatment. This formulation offers improved drug delivery and enhanced antihypertensive effects in animal studies.
Area of Science:
- Pharmaceutical Sciences
- Materials Science
- Pharmacology
Background:
- Hypertension management requires effective drug delivery systems.
- Olmesartan medoxomil (OLM) is a widely used antihypertensive medication.
- Developing sustained-release formulations can improve therapeutic outcomes.
Purpose of the Study:
- To prepare and evaluate sustained-release olmesartan tablets using a composite of sulfobutyl ether-β-cyclodextrin (SBE-β-CD) and spray-dried chitosan (SD-CS).
- To investigate the drug-excipient interactions and release kinetics.
- To assess the in vivo antihypertensive efficacy of the novel formulation.
Main Methods:
- Direct compression of OLM/SD-CS/SBE-β-CD composites to form tablets.
- Solubility studies to determine OLM and SBE-β-CD interaction (phase diagram analysis).
- In vitro drug release studies at pH 1.2 and 6.8.
- In vivo pharmacokinetic and pharmacodynamic studies in normal and hypertensive rats.
Main Results:
- A 1:1 inclusion complex formed between OLM and SBE-β-CD (AL type phase diagram).
- Tablets exhibited slow OLM release in vitro at both pH conditions.
- In vivo studies demonstrated sustained drug absorption and prolonged antihypertensive effects in rats.
- The SD-CS/SBE-β-CD composite enhanced the antihypertensive efficacy of OLM.
Conclusions:
- The OLM/SD-CS/SBE-β-CD composite system is effective for sustained drug release.
- This formulation holds potential for continuous hypertension treatment.
- Simple mixing of SD-CS and SBE-β-CD offers a viable approach for controlled drug delivery.
Related Concept Videos
Classifying Matter by Composition
According to its composition, the matter can be classified into two broad categories — pure substances and mixtures.
A pure substance is a form of matter that has a constant composition throughout with uniform properties. For example, any sample of sucrose has the same composition and same physical properties, such as melting point, color, and sweetness, regardless of the source from which it is isolated.
A mixture is composed of two or...
Group Design
Factorial Design
Composite Bodies
Composite bodies have widespread applications in mechanical engineering, from automobiles to aircraft to rockets. For example, an automobile wheel comprises...
Composition of Blood
Formed elements constitute the remaining 45% of the blood volume. These...
Energy-releasing Steps of Glycolysis
The first energy-releasing step—the 6th step of glycolysis...

