Related Experiment Video
Updated: Jul 24, 2026
05:08
Solubility of Hydrophobic Compounds in Aqueous Solution Using Combinations of Self-assembling Peptide and Amino Acid
Published on: September 20, 2017
Formulation approaches for orally administered poorly soluble drugs
S Pinnamaneni1, N G Das, S K Das
1Department of Pharmaceutical Sciences, Idaho State University, Pocatello, Idaho, USA.
Die Pharmazie
|June 14, 2002
Summary
Many drugs fail due to poor bioavailability. This review summarizes formulation strategies to enhance oral drug absorption and bioavailability for poorly soluble drugs, guided by the Biopharmaceutic Classification System.
Area of Science:
- Pharmaceutical Sciences
- Drug Delivery
- Biopharmaceutics
Background:
- Poor drug solubility and bioavailability are major hurdles in drug development, often necessitating high doses and leading to toxicity.
- The Biopharmaceutic Classification System (BCS) categorizes drugs based on solubility and permeability, aiding in the development of effective formulations.
- Conventional dosage forms struggle with poorly soluble drugs, impacting their therapeutic efficacy.
Purpose of the Study:
- To review and summarize formulation approaches for enhancing the oral bioavailability of poorly soluble drugs.
- To highlight the role of the Biopharmaceutic Classification System (BCS) in guiding formulation development.
- To provide an overview of current techniques used to overcome poor drug absorption.
Main Methods:
- Literature review of formulation strategies for poorly soluble drugs.
- Analysis of techniques based on Biopharmaceutic Classification System (BCS) principles.
- Synthesis of information on enhancing drug solubility and permeability.
Main Results:
- Various formulation approaches exist to improve drug absorption and bioavailability.
- BCS classification effectively guides the selection of appropriate formulation strategies.
- Techniques like particle size reduction and lipid-based formulations show promise.
Conclusions:
- Effective formulation strategies can overcome poor solubility and enhance oral bioavailability.
- The BCS provides a valuable framework for developing advanced drug delivery systems.
- Further research into novel formulations is crucial for improving drug development success rates.
Related Concept Videos
01:22Factors Influencing Drug Absorption: Physicochemical Parameters
The physicochemical characteristics of drugs play a crucial role in formulating stable and bioavailable drug products. The solubility of a drug, governed by the varying pH along the GI tract and its dissociation constant (pKa), is pivotal in determining its ionization state and absorption rate. Notably, weak acids and bases remain unionized and are absorbed more rapidly.
Enhanced drug absorption can be achieved by reducing particle sizes and increasing surface areas, thereby facilitating...
Enhanced drug absorption can be achieved by reducing particle sizes and increasing surface areas, thereby facilitating...
01:28Factors Influencing Drug Absorption: Pharmaceutical Parameters
Solid dosage forms such as tablets and capsules undergo rigorous manufacturing processes to ensure stability and effectiveness. Their dissolution and absorption properties are influenced significantly by the choice of excipients (inactive ingredients that serve various roles in the formulation), and the methodology applied during production. The manufacturing parameters, such as compression force and granulation techniques, significantly affect dissolution rates. Elevated compression forces...
01:23Factors Affecting Dissolution: Particle Size and Effective Surface Area
Dissolution kinetics, an essential aspect of oral drug delivery, is significantly influenced by the drug's particle size. According to the Noyes-Whitney dissolution model, the dissolution rate correlates directly with the drug's surface area. The larger the surface area, the higher the drug's solubility in water, leading to a faster drug dissolution rate. Reducing particle size increases the effective surface area, enhancing the dissolution process. Micronization and nanosizing are employed to...
01:16Bioavailability Enhancement: Drug Solubility Enhancement
Bioavailability is a critical factor in determining a drug's effectiveness. It refers to the proportion of a drug that enters the circulation when introduced into the body and is, as a result, able to have an active effect. Enhancing bioavailability is essential for drugs with poor solubility, as it can significantly impact their therapeutic efficacy. Various methods are employed to increase the solubility of drugs, thereby enhancing their bioavailability.Micronization and nanonization are...
01:27Bioavailability Enhancement: Drug Permeability Enhancement
After oral administration, poor permeability often limits the rate at which drugs are absorbed through the intestinal epithelium. Enhancing drug permeability is crucial for effective therapy, and several strategies have been developed to overcome this challenge.One effective strategy involves the use of lipid-based formulations. These formulations enhance dissolution and solubility, targeting physiological mechanisms to increase drug absorption. This includes stimulating bile salt secretion,...
01:23Oral Drug Delivery Systems: Introduction
Oral drug delivery is the most common route of administration due to its convenience, cost-effectiveness, and high patient compliance. It enables precise formulation to ensure proper drug dosage and bioavailability. The development of oral dosage forms considers drug properties such as solubility, stability, and absorption to optimize therapeutic efficacy.Tablets, capsules, liquids, and chewable formulations enhance drug stability, mask undesirable tastes, and improve patient experience.