92results about How to "Improve bioavailability in vivo" patented technology

The present invention relates to pharmaceutical compositions in particulate form or in solid dosage forms comprising a combination of fenofibrate and the HMG CoA reductase inhibitor rosuvastatin or a pharmaceutically active salt thereof, which upon oral administration provides a relative AUC_0-24 value (AUC_{fibric acid}/AUC_rosuvastatin) of between about 150 and about 12,000. The solid compositions are manufactured without any need of addition of water or aqueous medium and comprise at least 80% of the active substances fenofibrate and rosuvastatin in dissolved form, or, optionally, atorvastatin in micronized form, in order to ensure suitable bioavailability.

The invention discloses a method for preparing a nanoparticle coating with the bone induction and antibiosis functions on the surface of a medical metal. According to the method, nanoparticles with different electric properties as used as a carrier, the nanoparticles are formed by mutual crosslinking of high-molecular polymers, and growth factors and antibiotics are respectively loaded in the process of preparing the nanoparticles with dissimilar electric properties, wherein factors and factor-friendly polyanions are sufficiently mixed to react first and are then immobilized into the nanoparticles through ionic crosslinking; and amino-containing antibiotics are grafted to a polyaldehyde anionic polymer through chemical crosslinking first and are then loaded into the nanoparticles through ionic crosslinking. The two types of nanoparticles are alternately assembled on the surface of the medical metal through electrostatic adsorption, covalent crosslinking is also formed among the particles, and the stability of the coating is enhanced. The coating prepared by using the method has the function of controlling adsorption and release of the growth factors and the antibiotics under the normal physiological environment, the activity of the growth factors are keep well and a strong bone induction function is achieved; and in addition, the antibiotics can be slowly released for a long time, and a good antibiosis effect is achieved.

The invention discloses recombinant human bone morphogenetic protein-2 (rhBMP-2)-loaded chitosan microspheres, a preparation method thereof and application thereof. A substrate of the rhBMP-2-loaded chitosan microspheres is chitosan microspheres, and a loaded medicament is rhBMP-2. Chitosan reacts with an ionic cross-linking agent, and a reaction product is processed by solution of sodium hydroxide to prepare the chitosan microspheres; and the rhBMP-2 is loaded by a passive loading mode, so that the rhBMP-2 is adsorbed on the chitosan microspheres, wherein a weight ratio of the rhBMP-2 to thechitosan is (1-30):100. The preparation method is simple and easy, has a mild preparation condition and is favorable for maintaining the bioactivity of the rhBMP-2. The rhBMP-2-loaded chitosan microspheres can control and release the rhBMP-2 for a long term, promote the formation of new bones, and can be used for preparing medicaments for treating bone coloboma, nonunion and delayed union.

The invention relates to the technical field of medicines, in particular to a telmisartan solid dispersion as a specific angiotensin II receptor antagonist (ATI type) and a preparation method thereof. The telmisartan solid dispersion comprises medicine telmisartan, a carrier and an alkali matter, and also comprises a surfactant, wherein the carrier is a hydrophilic polymeric carrier, and the mass ratio of the medicine telmisartan to the hydrophilic polymeric carrier to the alkali matter to the surfactant is 1:(1-9):(0.1-0.5):(0.1-0.5). The telmisartan solid dispersion has better dissolution rate during the use, and is convenient for gastrointestinal tract absorption, thereby improving bioavailability.

The invention relates to the field of medicinal preparations, and provides a silybin nanometer suspension and a preparation method thereof. The silybin nanometer suspension is prepared from silybin, a stabilizer and water. The mass ratio of silybin to the stabilizer is 2:1-10:1. The mass ratio of the stabilizer in the suspension is 2-5%, and the mass ratio of the medicine is 10-20%. An improved medium grinding method is adopted, the obtained silybin nanometer suspension is small in grain size, narrow in distribution and good in stability, the medicine dissolution rate can be remarkably increased, and the medicine in-vivo bioavailability can be improved.

The invention relates to an apixaban pellet and a preparation method thereof. The apixaban pellet is composed of, from interior to exterior, a blank pellet core, a drug-containing layer and a coating layer, wherein the drug-containing layer is composed of micronized apixaban, a binder and a disintegrating agent. The apixaban pellet comprises, by weight, 60 to 84 parts of the blank pellet core, 2 to 7 parts of the micronized apixaban, 3 to 10 parts of the binder, 5 to 20 parts of the disintegrating agent and 2 to 8 parts of the coating layer. Thus, the apixaban pellet obtained in the invention has a rough and regular shape and uniform particle size; and compared with commercially available tablets, the apixaban pellet provided by the invention has better stability, faster dissolving-out rate and higher bioavailability.

The invention discloses a preparation method of a spherical micelle for packaging ginsenoside Rg3. The method includes the steps of weighing and fetching ginsenoside Rg3 and carrier materials to be dissolved in appropriate quantity of organic solvents, removing the organic solvent after the mixtures of ginsenoside Rg3 and the carrier materials are completely dissolved, and placing the mixtures in a vacuum drying box over a night; adding appropriate amount of deionized water into the mixtures for hydration, and conducting ultrasonic treatment when the mixtures are completely dissolved; using a filtering membrane to filter the hydration liquid after the ultrasonic treatment to obtain a transparent polymeric micelle solution, and then freezing and drying the solution to obtain the spherical micelle. The invention also discloses a spherical micelle for packaging the ginsenoside Rg3 and an application of the spherical micelle for packaging the ginsenoside Rg3.

The present invention discloses a Ginkgolide composition and a method for the preparation thereof. The composition includes two active components, Ginkgolide A and Ginkgolide B, and the weight ratio of Ginkgolide A to Ginkgolide B is 1: (2-9). A strong synergistic effect is found between Ginkgolide A and Ginkgolide B, which has a remarkable application effect on the treatment of cardio-cerebral vascular disease. The invention realizes simultaneous determination for the component content of the Ginkgolides preparation. Experiments show that the Ginkgolide A and Ginkgolide B have the advantages of good separating degree with better linear relation, reproducibility, precision, stability, and recovery rate. The dosage form of the preparations provided by the present invention is beneficial for improving the bioavailability in vivo and drug efficacy.

The present invention provides an atorvastatin calcium submicroemulsion and a preparation method thereof. The atorvastatin calcium submicroemulsion comprises atorvastatin calcium (phospholipid complex form), an oil phase solvent, an emulsifier, a stabilizer, a potential modifier, glycerol and water, wherein the atorvastatin calcium phospholipid complex is used as a precursor drug so as to increase the solubility of atorvastatin calcium in the oil phase, and a molar ratio of atorvastatin calcium to the phospholipid is 1:1. According to the present invention, the drug-containing phospholipid complex is adopted as the precursor drug of atorvastatin calcium, such that the solubility and the stability of the drug in the oil phase are improved, the drug loading is increased, and the use of the high-concentration organic solvent can be avoided; and compared to the commercially available lipitor (atorvastatin calcium tablet), the atorvastatin calcium submicroemulsion of the present invention has the following characteristics that the absorption of the drug in the small intestine is improved, and the high blood drug level is provided and is maintained for a long time after the atorvastatin calcium submicroemulsion is orally taken so as to effectively improve the bioavailability of the drug.

The invention belongs to the field of pharmacy, and relates to a breviscapine composition nano-particle and a preparation method thereof. The provided novel breviscapine composition nano-particle is prepared by a solution containing the breviscapine, a polymer, a surfactant and a solvent with the adoption of an electrostatic spraying technology. The composition preparation device is simple, the parameters are controllable, the drug loading capacity is high, , the direct and continuous nano-particles with uniform particle size distribution can be obtained, the specific surface area is increased, and the dissolution in vitro and bioavailability of the breviscapine are improved remarkably.

The invention discloses a piperine self-emulsifying soft capsule and a preparation method thereof. The preparation agent can improve the dissolution rate of piperine and bioavailability and further improves the curative effect. Piperine serving as the bioavailability reinforcer is adopted to prepare the self-emulsifying soft capsule, the bioavailability of other drugs can be improved in various ways, such as absorption, metabolism and the like, and great clinic significance is achieved on some medicines with excellent pharmacologic action, difficulty in absorption and easiness in metabolism. The piperine self-emulsifying soft capsule comprises piperine, an oil phase, a surfactant and a cosurfactant, of which the mass proportion is 1:(2.5-32.5):(15-35):(2.5-12.5). The preparation method comprises the following steps: dissolving a proper amount of piperine in the prescribed cosurfactant, uniformly mixing, then adding prescribed oil phase and surfactant, obtaining a transparent and homogeneous solution after complete dissolution, and pressing to obtain the soft capsule by adopting a conventional method.

The invention belongs to the technical field of medicinal chemistry, in particular relates to pyridazinone derivative prodrugs or a pharmaceutically acceptable salt thereof, and relates to a pharmaceutical composition of the prodrugs and an application in preparing an antitumor medicine. The pyridazinone derivative prodrugs having a structural formula (I) shown in the description provided by the invention have good in-vivo solubility, after the prodrugs enter a body, pyridazinone medicine molecules are released by metabolism, so that in-vivo bioavailability of the pyridazinone medicine molecules is greatly improved, and the pyridazinone medicine molecules bind to an in-vivo PARP enzyme in an irreversible manner to play pharmacological effects, and the antitumor activity is remarkable.

The invention relates to the field of pharmaceutical preparations and provides a nimodipine nanocrystallization method and a dry suspension thereof. The method comprises the following steps: nano-crystallizing nimodipine by adopting a medium grinding method; preparing a nano suspension in the presence of a stabilizer and water; then adding a suspending agent and a spray drying protective agent orother auxiliary materials to prepare nano suspension spray drying powder by further spraying and drying; and then adding other auxiliary materials and uniformly mixing to obtain the nimodipine dry suspension. The dry suspension is good in redispersibility, good in stability and convenient to take; nimodipine which is redispersed has small grain size and narrow distribution, and the potential of nimodipine meets the demand. The dissolution rate of the drug is improved obviously, and the bioavailability in vivo of the drug can be improved. Meanwhile, the dry suspension formula and preparation process are simple, and the preparation is safe and effective, has relatively low cost and is easy for industrial production.

The invention provides a pramipexole dihydrochloride sustained-release tablet composition and a preparation method thereof. The composition comprises the following components by weight: 0.1%-1% of pramipexole dihydrochloride, 10%-40% of hydroxypropyl methyl cellulose, 25%-50% of polyacrylic acid resin, 20-60% of pregelatinized starch, 0.3%-1.5% of colloidal silicon dioxide and 0.5%-1% of magnesium stearate.

The invention belongs to the field of medicines, and particularly relates to a composite nanometer particle obtained by coating curcumin eutectic crystal/piperine with polymers. The composite nanometer particle comprises a core and a shell coating the core, wherein the core is a mixture of the curcumin eutectic crystal and the piperine; the shell is a hydrophilic polymer. The invention further discloses a preparation method and application of the composite nanometer particle. According to the preparation method provided by the invention, the composite nanometer particle with an in-situ coatingstructure is successfully prepared by creatively utilizing a curcumin eutectic crystal compound through a supercritical fluid anti-solvent technology (SAS). The invention provides the composite nanometer particle with the advantages of better dissolution performance, stability and bioavailability.

The invention belongs to the field of medicine and particularly relates to an intelligent and novel medicine composition having anti-hepatitis B virus activity and a preparation method thereof.The medicine composition contains an enteric magnesium isoglycyrrhizinate sheet core and further contains other types of anti-hepatitis B virus medicine.To be specific, further improvement is made on the basis of the prior art, a dissolution layer is further added outside an enteric magnesium isoglycyrrhizinate coating layer, and unexpectedly, the magnesium isoglycyrrhizinate medicine composition high in dissolution rate and good in bioavailablity is obtained.Furthermore, the dissolution layer is sequentially wrapped by a medicine containing layer and a protection layer, so that a compound preparation is formed, the compound preparation is convenient to take, and patient compliance is greatly improved.