Polymethacrylate Microparticles Gel for Topical Drug Delivery.
Summary of "Polymethacrylate Microparticles Gel for Topical Drug Delivery."
Evaluating the potentials of particulate delivery systems in topical drug delivery.
Polymethacrylate microparticles (MPs) incorporating verapamil hydrochloride (VRP) as a model hydrophilic drug with potential topical clinical uses, using Eudragit RS100 and Eudragit L100 were prepared for the formulation of a composite topical gel. The effect of initial drug loading, polymer composition, particularly the proportion of Eudragit L100 as an interacting polymer component and the HLB of the dispersing agent on MPs characteristics was investigated. A test MPs formulation was incorporated in gel and evaluated for drug release and human skin permeation.
MPs showed high % incorporation efficiency and % yield. Composition of the hybrid polymer matrix was a main determinant of MPs characteristics, particularly drug release. Factors known to influence drug release such as MPs size and high drug solubility were outweighed by strong VRP-Eudragit L100 interaction. The developed MPs gel showed controlled VRP release and reduced skin retention compared to a free drug gel.
Topical drug delivery and skin retention could be modulated using particulate delivery systems. From a practical standpoint, the VRP gel developed may offer advantage in a range of dermatological conditions, in response to the growing off-label topical use of VRP.
Department of Pharmaceutics, Faculty of Pharmacy, Alexandria University, Alexandria, Egypt, 21521, firstname.lastname@example.org.
This article was published in the following journal.
Name: Pharmaceutical research
- PubMed Source: http://www.ncbi.nlm.nih.gov/pubmed/20652728
- DOI: http://dx.doi.org/10.1007/s11095-010-0212-9
Drug delivery to the eye is made difficult by multiple barriers (such as the tear film, cornea, and vitreous) between the surface of the eye and the treatment site. These barriers are difficult to sur...
Information on the preparation and properties of starch/gelatin blend microparticles with and without crosslinking for drug delivery is presented. The blend microparticles were prepared by the water-i...
Abstract Topical therapy is at the forefront in treating nail ailments (especially onychomycosis and nail psoriasis) due to its local effects, which circumvents systemic adverse events, improves patie...
Purpose: The present study involves preparation and evaluation of diclofenac buccal-mucoadhesive microparticles for prolongation of buccal residence time. Methods: The microparticles were prepared by ...
Poly(ethylene glycol) based hydrogel microparticles were developed for pulmonary drug delivery. Hydrogels are particularly attractive for pulmonary delivery because they can be size engineered for del...
Clinic-based evaluation of patients compliance with topical medications in the treatment of glaucoma. Also assessing effectiveness of delivery techniques among these patients.
The purpose of this study is to evaluate the safety and tolerability of a single iontophoretic dose of buffered solution administered through the EyeGate® II Drug Delivery System in healt...
The primary hypothesis of this proposal is that chronic kidney disease (CKD) and treatment with calcineurin inhibitors (CNIs) are each associated with the release of endothelial microparti...
This blinded cross-over study aim to evaluate the efficacy of topical liposome-encapsulated ropivacaine formulations.
The aim of this study is to determine the prevalence of asymptomatic lower extremity DVT detected by US-Doppler and procoagulant microparticles in a selected group of cancer patients suffe...
Medical and Biotech [MESH] Definitions
Forms to which substances are incorporated to improve the delivery and the effectiveness of drugs. Drug carriers are used in drug-delivery systems such as the controlled-release technology to prolong in vivo drug actions, decrease drug metabolism, and reduce drug toxicity. Carriers are also used in designs to increase the effectiveness of drug delivery to the target sites of pharmacological actions. Liposomes, albumin microspheres, soluble synthetic polymers, DNA complexes, protein-drug conjugates, and carrier erythrocytes among others have been employed as biodegradable drug carriers.
Systems for the delivery of drugs to target sites of pharmacological actions. Technologies employed include those concerning drug preparation, route of administration, site targeting, metabolism, and toxicity.
Extracellular membrane vesicles generated by the shedding of CELL MEMBRANES blebs. Microparticles originating from PLATELETS; ENDOTHELIAL CELLS; and other cell types circulate in the peripheral blood and through the MICROVASCULATURE where larger cells cannot, functioning as active effectors in a variety of vascular processes such as INFLAMMATION; HEMOSTASIS; angiogenesis; and vascular reactivity. Increased levels are found following stimulation of bleb formation under normal or pathological conditions.
Artificial, single or multilaminar vesicles (made from lecithins or other lipids) that are used for the delivery of a variety of biological molecules or molecular complexes to cells, for example, drug delivery and gene transfer. They are also used to study membranes and membrane proteins.
The delivery of a drug into a fluid-filled cavity of the brain.