716 results about "Hydrophobic drug" patented technology

Biodegradable polymeric implants can provide a safe and efficient means to deliver drugs in the treatment of various diseases. Although a polymeric drug delivery system can be implanted as a solid device within a subject, it is also possible to administer such a system as an injectable liquid which solidifies in vivo. An improved formulation of a polymeric drug delivery system comprises a water insoluble copolymer that is a solid or wax at 37° C., a water soluble polymer that is a liquid at 25° C., and a hydrophobic drug. These drug delivery systems can be administered by injection, and do not require the use of a toxic curing agent or inconvenient temperature manipulations.

Pharmaceutical compositions and dosage forms for administration of hydrophobic drugs are provided. The pharmaceutical compositions include a therapeutically effective amount of a hydrophobic drug, preferably a steroid; a solubilizer, and a surfactant. The synergistic effect between the hydrophobic drug and the solubilizer results in a pharmaceutical formulation with improved dispersion of both the active agent and the solubilizer. As a result of the improved dispersion, the pharmaceutical composition has improved bioavailability upon administration. Methods of improving the bioavailability of hydrophobic drugs administered to a patient are also provided.

The present invention is directed to the oral osmotic delivery of therapeutic compounds that have limited solubility in an aqueous environment due to inherent hydrophobicity or to saturation limitations in the core of the osmotic system. The present invention is suitable for the osmotic delivery of glipizide and other hydrophobic drugs, but runs the spectrum to other therapeutic agents with higher aqueous solubilities, yet having a solubility limitation in an osmotic dosage unit due to high drug load.

Disclosed are compositions comprising a hydrophobic active agent, a polymer and a reconstitution enhancing agent. Reconstitution of the lyophilized form of the compositions takes less time than in the absence of the enhancing agent.

The present invention relates to oil-based formulations of hydrophobic drugs for the uniform coating of medical devices such as vascular stents and balloons. Another aspect of the present invention is an intravascular medical device having an oil-based coating suitable for delivering a water-insoluble drug, comprising one or more of an anti-oxidant, an anti-inflammatory and an anti-restenotic agent.

The present invention is directed to polymeric materials (e.g., coatings) comprising biodegradable copolymers and implantable devices (e.g., drug-delivery stents) formed of such materials. The biodegradable copolymers are derived from at least two relatively polar monomers and at least one relatively nonpolar monomer. Incorporation of at least one relatively nonpolar monomer into the copolymer improves controlled release of a hydrophobic drug from the polymeric material by increasing the copolymer's miscibility with and permeability to the hydrophobic drug. The polymeric materials can also contain at least one biocompatible moiety, at least one non-fouling moiety, at least one biobeneficial material, at least one bioactive agent, or a combination thereof. The polymeric materials are designed to improve the mechanical, physical and biological properties of implantable devices formed thereof.

In accordance with the present invention, novel formulations have been developed which are much more effective for the delivery of hydrophobic drugs to patients in need thereof than are prior art formulations. Invention formulations are capable of delivering more drug in shorter periods of time, with reduced side effects caused by the pharmaceutical carrier employed for delivery.

The present invention provides compositions comprising nanoparticles comprising: 1) a drug, such as a hydrophobic drug derivative; and 2) a carrier protein. Also provided are methods of treating diseases (such as cancer) using the compositions, as well as kits and unit dosages.

The present invention relates to a pharmaceutical composition of a biologically active agent and a block copolymer composed of a poly(ethylene oxide) forming hydrophilic segment and a poly(butyl (alkyl)acrylate-co-(alkyl)acrylic acid) that is capable of forming supramolecular assemblies or micelles under favourable conditions. The supramolecular assemblies or micelles formed from said polymers associate or dissociate reversibly upon changes in the environmental pH. The pharmaceutical compositions of the present invention contain hydrophobic drugs, cations or polycationic compounds, which can be delivered to the body by oral route or other routes of administration.

A drug delivery system for oral administration of hydrophobic drugs with enhanced and extended absorption and improved pharmacokinetics is provided. In one embodiment, formulations comprising testosterone and testosterone esters, e.g., testosterone palmitate, are disclosed. Methods of treating a hormone deficiency or effecting male contraception with the inventive formulations are also provided.

The invention relates to a preparation method for a nano-granular solid dispersion of a hydrophobic drug by high-voltage electrostatic spraying, which comprises the following steps of: mixing a hydrophobic drug, a drug-carrying polymer and an organic solvent at a mass ratio of (1-10): (10-20): (80-94) to prepare a consolute electric spraying solution; and then carrying out high-voltage electrostatic spraying while controlling the flow rate of the consolute electric spraying solution at 0.5-2.5 mL/h, the distance between a receiving board and a wire spraying port at 15-30cm and the voltage at 5-30kV to obtain the nano-granular solid dispersion of the hydrophobic drug. The preparation method is simple to operate, is low in cost, is environmentally-friendly and is suitable for industrial production; and the prepared solid dispersion of the hydrophobic drug not only can highly disperse a composite of a polymer and the drug into an amorphous state and has a nano-structural characteristic.

This invention relates to novel carbohydrate polymers with hydrophobic and hydrophilic side-groups suitable for solubilising, for example, hydrophobic drugs. The chain length of the carbohydrate polymeric backbone, and the type and number of the hydrophobic and hydrophilic side-groups are specifically chosen to improve the solubility properties of the carbohydrate polymers.

The invention relates to a polyethylene glycol/aliphatic polyester/cationic polymer amphiphilic triblock copolymer. The copolymer contains a hydrophilic non-ionic polymer block, a hydrophobic block and a pH-sensitive cationic polymer block. Potassium hydride is taken as an initiator, the polyethylene glycol and the aliphatic polyester monomers and the cationic monomer are sequentially added in a polymerization reactor for respective reaction, methanol is added for terminating the reaction; n-hexane is used for the precipitation and the purification of the triblock copolymer in tetrahydrofuran, the precipitation is repeated for 3 times, and a product undergoes the vacuum drying. The copolymer can form a micelle or a nanoparticle by self-assembly in a water medium, wherein, a core of a loading hydrophobic drug is formed by clustering the hydrophobic cationic polyester block, the polyethylene glycol block is assembled into a hydrophilic shell, thus having the functions of stabilizing the micelle and effectively avoiding the capture and protein absorption of a reticuloendothelial system of an organism; the cationic polymer block can be further acted with DNA, protein, peptide and other biological macromolecules, thus forming the biodegradable and pH-sensitive drug-loading polymer micelle or the nanoparticle which can be further dispersed,.

The invention relates to a nanoparticle and a preparation method thereof. Poly(lactide-glycolide acid) (PLGA) is in the center to serve as a core, phospholipid surrounds the surface of the PLGA core in monolayer and distearoyl phosphatidylethanolamine-polyethyleneglycol-carboxyl (DSPE-PEG-COOH) penetrates the monolayer phospholipid to serve as the shell. The phospholipid, the DSPE-PEG-COOH and the PLGA have good biocompatibility, can entrap hydrophobic drugs and control the drugs to release slowly in the human bodies. The phospholipid surrounds the surface of the PLGA, thus ensuring that the particle can avoid immune system recognition so that the circulating half life of the particle is lengthened. The PEG shell ensures the particle to have spatial stability, static stability, long circulation and other characteristics and to be not easily agglomerated. Meanwhile, carboxyl is easily crosslinked with such ligands as antibodies, peptide, probes and the like, thus ensuring the particle to have targeting characteristic. The preparation method of the nanoparticle is simple, convenient practical and is easy to operate and popularize.