Related Experiment Video
Updated: Feb 26, 2026
11:27
A Package of Established Analytical Tools to Investigate the Solid-State Alteration of Lipid-Based Excipients
Published on: August 9, 2022
2.6K
Saturated phosphatidylcholine as matrix former for oral extended release dosage forms
Marina Kolbina1, Roland Bodmeier1, Martin Körber2
1College of Pharmacy, Freie Universität Berlin, Kelchstr. 31, 12169 Berlin, Germany.
Summary
Saturated phosphatidylcholine (Phospholipon® 90H) shows promise as an extended-release excipient in matrix tablets. This phospholipid enables direct compression and controlled drug release for various drugs, offering tunable release profiles.
Area of Science:
- Pharmaceutical Technology
- Materials Science
Background:
- Phospholipids are increasingly explored as functional excipients in drug delivery systems.
- Developing effective extended-release formulations requires careful selection of matrix formers to control drug dissolution.
Purpose of the Study:
- To assess saturated phosphatidylcholine (Phospholipon® 90H) as an extended-release excipient in matrix tablets.
- To evaluate its suitability for drugs with varying aqueous solubility.
Main Methods:
- Matrix tablets were prepared by direct compression using Phospholipon® 90H and three model drugs: theophylline, caffeine, and diprophylline.
- Drug release kinetics were studied at different drug loadings and tablet dimensions.
- Dissolution robustness was tested under varying agitation and ionic strength conditions.
Main Results:
- Phospholipon® 90H exhibited favorable powder flow and compaction properties, allowing direct compression.
- Extended drug release, governed by diffusion (Fick's law), was achieved and tunable by drug loading and tablet size.
- Caffeine release varied from 1.5 to 18 hours based on drug loading (10-70%).
- The matrix tablets demonstrated robust dissolution profiles across different agitation speeds and ionic strengths.
- Drug release was pH-dependent, showing faster release at acidic pH due to matrix-former protonization.
Conclusions:
- Saturated phosphatidylcholine is a suitable excipient for creating extended-release matrix tablets.
- Its properties allow for controlled diffusion-based drug release, adaptable to drug solubility and formulation design.
- The excipient demonstrates good performance stability in various physiological conditions.
Related Concept Videos
01:27Synthesis of Phosphatidylcholine in the ER Membrane
4.4K
The ER synthesizes lipids for building cell membranes and performing cellular functions such as energy storage and signaling. The lipid synthesis machinery embedded in the ER membrane primarily collects all reactants from the cytosol. Following synthesis, the secretory pathway and the ER contact sites distribute these lipids to other cellular organelles. Additionally, the energy-rich triacylglycerides are transported from the ER via lipid droplets.
The major components of all eukaryotic cell...
The major components of all eukaryotic cell...
4.4K
01:26Oral Drug Delivery Systems: Continuous-Release Systems
74
Continuous-release drug delivery systems offer a strategic approach to maintaining therapeutic drug levels over extended periods following oral administration. By modulating the release rate of active pharmaceutical ingredients, these systems minimize fluctuations in plasma concentrations, which enhances clinical efficacy and reduces the need for frequent dosing. Such characteristics make them particularly advantageous in managing chronic diseases where patient adherence and stable drug...
74
01:19Modified-Release Drug Delivery Systems: Rate-Programmed II
50
Rate-programmed drug delivery systems release drugs in a controlled manner to maintain therapeutic levels. Three main designs include reservoir, matrix, and hybrid systems.Reservoir systems consist of a drug core enclosed within a membrane that controls drug release. In non-swelling reservoir systems, polymers like ethyl cellulose or polymethacrylates are used. These do not hydrate in aqueous media and control release through membrane thickness, porosity, or insolubility. This type includes...
50
01:11Oral Drug Delivery Systems: Delayed-Release Systems
66
Delayed-release drug delivery systems are specialized pharmaceutical formulations designed to postpone the release of active compounds until the drug reaches a specific region of the gastrointestinal (GI) tract, typically the intestine. These systems are essential for drugs that may cause gastric irritation, are unstable in acidic environments, or need to exert therapeutic effects locally in the intestinal or colonic regions.The core feature of delayed-release systems is the use of enteric...
66
01:28Overview of Fatty Acid Metabolism
37.4K
Lipids also are sources of energy that power cellular processes. Like carbohydrates, lipids are composed of carbon, hydrogen, and oxygen, but these atoms are arranged differently. Most lipids are nonpolar and hydrophobic. Major types include fats and oils, waxes, phospholipids, and steroids.
Fatty acids are catabolized in a process called beta-oxidation, which takes place in the matrix of the mitochondria and converts their fatty acid chains into two-carbon units of acetyl groups. The acetyl...
Fatty acids are catabolized in a process called beta-oxidation, which takes place in the matrix of the mitochondria and converts their fatty acid chains into two-carbon units of acetyl groups. The acetyl...
37.4K
01:22Modified-Release Drug Delivery Systems: Rate-Programmed I
46
Rate-programmed drug delivery systems (DDS) are designed to release drugs at specific, controlled rates to maintain consistent therapeutic levels. These systems are categorized based on their release mechanisms, including dissolution-controlled DDS, diffusion-controlled DDS, and combined dissolution-diffusion-controlled DDS.In dissolution-controlled DDS, the release rate depends on the slow dissolution of the drug itself or the surrounding matrix. Drugs with inherently slow dissolution rates,...
46