Abstract:
PURPOSE: A transdermal absorption composition containing loxoprofen or its salt is provided to suppress generation of crystallization and ensure adhesion which is applicable to joint of human body. CONSTITUTION: A transdermal absorption composition contains 0.5-50 weight% of loxoprofen or its salt, 7-15 weight% of glycerol monolaurate as absorber, 20-92 weight% of adhesion polymer and 0.1-20 weight% of sorbitan ester as a stabilizing agent. The sorbitan ester is sorbitan sesquioleate or sorbitan sesquistearate. The composition further contains acetic acid, lactic acid or myristic acid. The salt of loxoprofen is loxoprofen sodium.
Abstract:
A transdermal preparation is provided to promote the drug absorption by the skin hydration through a hydrophobic adhesive layer, show continuous and high effect of a drug by maintaining the thermodynamic activity of the hydrophobic drug in an adhesive caused by moisture discharged from skin and be able to reduce the cost and the time due to a very simple preparing process. A transdermal preparation for a hydrophobic drug comprises a supportive layer(1) which is the uppermost portion of a layered structure and has the elasticity; a hydrophobic adhesive layer(2) which is layered under the supportive layer and prevents the loss of moisture absorbed from skin and the reverse conversion of the drug; and a drug containing adhesive layer(3) which is layered under the hydrophobic adhesive layer, includes a drug and attaches the transdermal preparation to the skin and is characterized in that the drug adhesive layer includes a hydrophobic drug such as a non-steroidal antiphlogistics and an absorption promoting agent, where a hydrophobic adhesive of the hydrophobic adhesive layer is selected from the group consisting of polyisobutylene adhesive, styrene-isoprene-styrene adhesive, and styrene-butadiene-styrene adhesive, the drug containing adhesive layer is an acrylate polymer made from acrylate, hydroxypropyl acrylate, acrylamide, acrylamide vinyl acetate, vinyl derivative, methacrylate, hydroxypropyl methacrylate and methacrylamide. The preparation further comprises a release layer(4) which is layered under the drug adhesive layer and protects the drug adhesive layer before use.
Abstract:
A transdermal preparation is provided to continuously allow a highly concentrated hydrophobic drug to be absorbed into skin until a patch is detached from the skin with minimized skin side effects and provide the enough adhesive capability during the time of exhibiting the medical efficacy by being attached to the skin. A transdermal preparation for a hydrophobic drug comprises a supportive layer(1) which is the uppermost portion of a layered structure and has the elasticity; a hydrophobic adhesive layer(2) which is layered under the supportive layer and prevents the loss of moisture absorbed from skin and the reverse conversion of the drug; and a drug adhesive layer(3) which is layered under the hydrophobic adhesive layer, includes a drug and attaches the transdermal preparation to the skin and is characterized in that the drug adhesive layer includes a hydrophobic drug such as a non-steroidal antiphlogistics and an acryl adhesive agent and the acryl adhesive agent includes a hydrophilic monomer promoting the skin absorption from the skin and is selected from the group consisting of acrylic acid, methyl methacrylate, ethyl acrylate, hydroxyethyl acrylate, butyl acrylate, octyl acrylate, 2-ethylhexyl acrylate, and hexyl acrylate. The preparation further comprises a release layer(4) which is layered under the drug adhesive layer and protects the drug adhesive layer before use.
Abstract:
A composition for transdermal absorption is provided to increase solubility of non-steroidal anti-inflammatory drug as an effective ingredient by using a small amount of solubilizer, thereby containing high concentration of effective ingredient without skin irritation. A formulation comprising a polymeric matrix is also provided to maximize skin absorption of the effective ingredient. A composition for transdermal absorption comprises 0.1-50 wt.% of a non-steroidal anti-inflammatory drug, 0.01-10 wt.% of alkali metal-containing alcohol derivatives represented by the formula(1): M-O-R in which M is a Group I metal, O is oxygen and R is C1-5 alkyl as a solubilizer, 40-98 wt.% of a polymer adhesive and a volatile solvent. A formulation for transdermal absorption comprises a release paper, a polymeric matrix(2) prepared by coating the release paper(3) with the composition for transdermal absorption, and a support(1), sequentially, and has the thickness of 10-120 mum.