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, email@example.com.
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
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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.