摘要:
The present, invention relates to a transdermal absorption preparation. The transdermal absorption preparation of the present invention comprises a drug-containing adhesive layer, a drug-protective layer and a release layer, wherein the drug-containing adhesive layer contains ropinirole or a salt thereof, rubber, an adhesion-imparting resin, an antioxidant, and a transdermal absorption promoter. Also, the present invention provides a transdermal absorption preparation comprising a drug-containing adhesive layer, a drug-protective layer, and a release layer, wherein the drug-containing adhesive layer contains ropinirole or a salt thereof, acrylic rubber, an anti-crystallisation agent, and a transdermal absorption promoter. When the transdermal absorption preparation of the present invention is used for the treatment of Parkinson's disease or restless leg syndrome, no side effect due to an increase in the initial drug concentration in blood occurs and the skin penetration effect of the drug is excellent.
摘要:
A biodegradable, mixed polymeric micelle used to deliver a selected nucleic acid into a targeted host cell contains an amphiphilic polyester-polycation copolymer and an amphiphilic polyester-sugar copolymer. The polyester-polycation copolymer forms an electrostatic interaction with polyanionic nucleic acids, and the polyester-sugar copolymer directs the micelle-nucleic acid complex to cells in vivo. Additional copolymers with similar properties may also be included. The composition improves delivery efficiency by providing a particulate gene carrier for which particle size and charge density are easily controlled by multivariate means. Various kinds of ligands and other functional compounds may be also be introduced using the composition. The composition may be used in a method for transforming a targeted host cell with a selected nucleic acid.
摘要:
A system and method for the parenteral delivery of a drug in a biodegradable polymeric matrix to a warm blooded animal as a liquid with the resultant formation of a gel depot for the controlled release of the drug. The system comprises an injectable biodegradable block copolymeric drug delivery liquid having reverse thermal gelation properties. The delivery liquid is an aqueous solution having dissolved or dispersed therein an effective amount of a drug intimately contained in a biodegradable block copolymer matrix. The copolymer has a reverse gelation temperature below the body temperature of the animal to which it is administered and is made up of (i) a hydrophobic A polymer block comprising a member selected from the group consisting of poly(.alpha.-hydroxy acids) and poly(ethylene carbonates) and (ii) a hydrophilic B polymer block comprising a polyethylene glycol. Prior to use the liquid is maintained at a temperature below the reverse gelation temperature of the block copolymer. The liquid is parenterally administered into the animal by intramuscular, intraperitoneal, subcutaneous or similar injection with the liquid forming a gel depot of the drug and biodegradable block polymer as the temperature of the liquid is raised by the body temperature of the animal the reverse gelation temperature of the block copolymer. The drug is released at a controlled rate from the copolymer which biodegrades into non-toxic products. The degradation rate can be adjusted by proper selection of the poly(.alpha.-hydroxy acid) utilized in forming the biodegradable hydrophilic A block.
摘要:
The patch for tooth whitening of the present invention includes a tooth-adhering layer (1) containing erodible polymer complexes formed by hydrogen bonding of a polymer with a carboxyl group (—COOH) and a polymer with a carbonyl group (—C═O) or ether group (—O—) and a tooth whitening agent; and an erosion rate-controlling layer (2) containing a mixture of a hydrophilic polymer and a film-forming polymer, wherein the patch is in a film form and is characterized by being eroded until extinguished after releasing the tooth whitening agent. When applied to the teeth, the patch releases a peroxide tooth-whitening agent while being hydrated by water in the mouth during a prescribed period, and thereafter, eroded until extinguished, thereby not requiring an additional detaching work from the teeth. Therefore, the patch is convenient in use and greatly reduces an obstruction sensation. Moreover, the patch has an excellent whitening effect.
摘要:
A dual drug containing adhesive transdermal drug delivery system comprising: a support layer, a first drug containing adhesive layer and a second drug containing adhesive layer each of said layers having a proximal and distal surface wherein each layer is positioned adjacent to the other with each layer having its distal surface laminated to said support layer, and a peelable backing layer positioned over and laminated to the proximal surface of said first and second adhesive layers is disclosed.
摘要:
A biocompatible, heterofunctional, star-shaped poly(ethylene glycol) is described. Methods of making the heterofunctional star-shaped poly(ethylene glycol) and using it for conjugation with proteins are also described.
摘要:
Peptide/protein biodegradable drug delivery devices are prepared as microspheres without the use of solvents by a polymer melt process. A melt of thermostable polypeptides and an appropriate low melting block copolymer mixture is prepared and dispersed in an appropriate fluid medium such as air, water or an immiscible organic fluid without using any organic solvent to form microdroplets. The fluid medium is cooled to solidify the microdroplets into microspheres and then collected and purified or further processed as drug delivery devices. These biodegradable microspheres are suitable as implantable or injectable pharmaceutical formulations. Following administration as solid microspheres into the body of a warm blooded animal, the formulations absorb water from the body to form a hydrogel from which the polypeptide is released continuously over an extended period of time.