Related Experiment Video
Updated: May 5, 2026
18:46
Methods Development for Blood Borne Macrophage Carriage of Nanoformulated Antiretroviral Drugs
Published on: December 9, 2010
13.9K
Efavirenz dissolution enhancement I: co-micronization.
Maíra Assis da Costa1, Rafael Cardoso Seiceira, Carlos Rangel Rodrigues
1Laboratory of Industrial Pharmaceutical Technology (LabTIF), Faculty of Pharmacy, Federal University of Rio de Janeiro, Rio de Janeiro, Brazil. cristianedrago@gmail.com.
Pharmaceutics
|December 5, 2013
Summary
This study improved efavirenz (EFV) dissolution using co-micronization with sodium lauryl sulfate (SLS) and polyvinylpyrrolidone (PVP). Co-processed EFV with SLS significantly enhanced drug dissolution compared to physical mixtures and PVP formulations.
Area of Science:
- Pharmaceutical Sciences
- Drug Delivery Systems
- Materials Science
Background:
- Acquired Immunodeficiency Syndrome (AIDS) is a major global health concern.
- Efavirenz (EFV), a key antiretroviral, exhibits poor water solubility (Biopharmaceutics Classification System Class II).
- Enhancing EFV dissolution is crucial for improving its therapeutic efficacy.
Purpose of the Study:
- To develop and characterize novel systems for efavirenz (EFV) with improved dissolution profiles.
- To investigate the efficacy of co-processing EFV with sodium lauryl sulfate (SLS) and polyvinylpyrrolidone (PVP) via co-micronization.
- To evaluate different drug:excipient ratios for optimal dissolution enhancement.
Main Methods:
- Co-micronization technique employed to process efavirenz (EFV) with sodium lauryl sulfate (SLS) and polyvinylpyrrolidone (PVP).
- Three distinct drug:excipient ratios were tested for each carrier.
- Dissolution profiles of co-processed samples were compared against non-processed EFV and physical mixtures.
Main Results:
- All co-processed EFV systems demonstrated significantly improved dissolution rates compared to untreated EFV and physical mixtures.
- Co-micronization with SLS yielded superior dissolution profiles over PVP.
- The optimal EFV:SLS ratio was identified as 1:0.25, showing the most substantial dissolution enhancement.
- Characterization confirmed no loss of crystallinity and no molecular interactions, suggesting improved wettability.
Conclusions:
- Co-micronization with SLS is an effective strategy to enhance the dissolution of poorly soluble efavirenz (EFV).
- The improved wettability of the co-processed drug, due to hydrophilic layer formation, is the likely mechanism for enhanced dissolution.
- This approach offers a promising method for improving the bioavailability of EFV without altering its molecular structure.
Related Concept Videos
01:23Factors Affecting Dissolution: Particle Size and Effective Surface Area
1.9K
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...
1.9K
01:16Bioavailability Enhancement: Drug Solubility Enhancement
499
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...
499
01:05Bioavailability Enhancement: Drug Stability Enhancement and GI Retention
332
Improving a drug's stability in the gastrointestinal (GI) tract is paramount for enhancing its bioavailability and therapeutic effectiveness. Various strategies are employed to protect the drug from the harsh gastric milieu and to ensure its release and absorption at the desired site within the GI tract.Polymer coatings are one such method used to shield drugs from the stomach's acidic environment. By preventing premature drug release, these coatings improve the bioavailability of unstable...
332
01:27Factors Influencing Drug Absorption: Drug Dissolution
1.8K
The pharmacokinetic journey of drugs from solid oral dosage forms into systemic circulation is multifaceted. It begins with disintegration, a prerequisite ensuring a solid dosage form's subdivision into minute particles. Dissolution occurs next as these granulated entities solubilize in gastrointestinal fluids. This solubilization is crucial for the succeeding stage, permeation, which describes the traversal of the drug across the intestinal membrane and its subsequent entry into the blood...
1.8K
01:17In Vitro Drug Dissolution: Alternative Methods
380
Alternative drug dissolution methods include the rotating bottle, intrinsic dissolution test, peristalsis, and the Franz diffusion cell method. The rotating bottle method involves meticulously rotating tightly capped controlled-release beads in a temperature-controlled bath. Periodic decanting of samples allows for residue assay, followed by refilling with fresh medium and testing at various pH levels to emulate the gastrointestinal tract conditions.In contrast, the intrinsic dissolution test...
380
01:27Bioavailability Enhancement: Drug Permeability Enhancement
352
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,...
352