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32results about How to "Avoid systemic side effects" patented technology

Gastric targeted drug carrier and preparation method thereof

The invention relates to the field of drug carrier preparation, in particular to a gastric targeted drug carrier and a preparation method thereof. The gastric targeted drug carrier is prepared from the following raw materials: drug-containing emulsion and a crosslinking agent, wherein the drug-containing emulsion contains chitosan, chitosan quaternary ammonium salt and sodium glycerophosphate; and the crosslinking agent is used for crosslinking the emulsion into microspheres. The preparation method comprises the following steps: 1) preparing the drug-containing emulsion: with a aqueous solution of chitosan, chitosan quaternary ammonium salt and sodium glycerophosphate as an aqueous phase W, preparing the drug-containing emulsion with the aqueous phase, drugs and an oil phase containing anemulsifying agent; and 2) heating and stirring the drug-containing emulsion prepared in the step 1), crosslinking the chitosan quaternary ammonium salt and sodium glycerophosphate contained in the drug-containing emulsion to obtain gel microsphere suspension, heating the suspension and adding the crosslinking agent to carry out secondary crosslinking to solidify the gel microspheres. The drug carrier has the advantages of uniform and controllable grain size, high embedding rate and good dispersibility and simultaneously meets the requirements of the gastric targeted drug delivery carrier.
Owner:INST OF PROCESS ENG CHINESE ACAD OF SCI

Gastric targeted drug carrier and preparation method thereof

The invention relates to the field of drug carrier preparation, in particular to a gastric targeted drug carrier and a preparation method thereof. The gastric targeted drug carrier is prepared from the following raw materials: drug-containing emulsion and a crosslinking agent, wherein the drug-containing emulsion contains chitosan, chitosan quaternary ammonium salt and sodium glycerophosphate; and the crosslinking agent is used for crosslinking the emulsion into microspheres. The preparation method comprises the following steps: 1) preparing the drug-containing emulsion: with a aqueous solution of chitosan, chitosan quaternary ammonium salt and sodium glycerophosphate as an aqueous phase W, preparing the drug-containing emulsion with the aqueous phase, drugs and an oil phase containing anemulsifying agent; and 2) heating and stirring the drug-containing emulsion prepared in the step 1), crosslinking the chitosan quaternary ammonium salt and sodium glycerophosphate contained in the drug-containing emulsion to obtain gel microsphere suspension, heating the suspension and adding the crosslinking agent to carry out secondary crosslinking to solidify the gel microspheres. The drug carrier has the advantages of uniform and controllable grain size, high embedding rate and good dispersibility and simultaneously meets the requirements of the gastric targeted drug delivery carrier.
Owner:INST OF PROCESS ENG CHINESE ACAD OF SCI

Tofacitinib nanocrystal eye drops and preparation method thereof

The invention provides tofacitinib nanocrystal eye drops for treating immunity-related eye diseases and a preparation method thereof, and the tofacitinib nanocrystal eye drops are prepared by the following steps: dispersing micronized tofacitinib in a surfactant solution at a high speed, then mixing with a stabilizer, uniformly dispersing, and then carrying out high-pressure homogenization circulation, so as to obtain the tofacitinib nanocrystal eye drops. The tofacitinib nanocrystal eye drops meeting the particle size requirement are obtained. Wherein the surfactant is P188-lecithin, and the stabilizer is any one or a mixture of more of HPMC (Hydroxy Propyl Methyl Cellulose), polyvinyl alcohol and HPMC-docusate sodium. Through cooperation of the surfactant and the stabilizer, the particle size and the potential of the eye drops are influenced, the stability and the adhesiveness are improved, the residence time of the medicine in eyes is prolonged, and the medicine carrying rate is high. The loss speed of the medicine in front of the cornea is reduced, so that the medicine can be slowly released, the eye drop frequency of a patient is reduced, the compliance of the patient is improved, and a good clinical application prospect is achieved.
Owner:THE FIRST AFFILIATED HOSPITAL OF ZHENGZHOU UNIV

Method of treating viral infections

A method of pharmaceutical therapy comprising the co-administration of any form of interferon or any derivative thereof with a low dose of ribavirin (less than 400 mg /day or less than 6 mg/kg/day), or related compound, where the ribavirin or related compound provides a clinically effective blood level in the portal circulation but a less than clinically effective blood level in the peripheral circulation, to thereby provide a systemic effect of interferon throughout the body but a selective effect of ribavirin in the liver. The method also provides for the co-administration of any form of interferon or any derivative thereof with a high dose of ribavirin (preferably from 400-800 mg/day), or related compound, where the ribavirin or related compound is administered as a slow-release formulation such that it also provides a sustained virologic response in a patient and reduced side effects. The method also provides for the co-administration of an antioxidant or other membrane protective agent with both the interferon and ribavirin such that the hepatoprotective activity of the antioxidant or other membrane protective agent complements the virucidal effect of the interferon and ribavirin. The antioxidant or other membrane protective agent may be administered as a systemic or a low-dose, slow-release, liver-selective formulation.
Owner:HOWARD J SMITH & ASSOC

Application of hollow nano-particles in preparation of medicine for treating osteoporosis

The invention discloses application of hollow nano-particles in preparation of a medicine for treating osteoporosis, and belongs to the technical field of medical medicine preparation. Firstly, the invention provides the application of the hollow nano-particles which take extracorporeal shock wave response type zoledronic acid as a skeleton ingredient in the preparation of the medicine for treating the osteoporosis. Secondly, the invention provides the application of the hollow nano-particles which take zoledronic acid and / or a composition containing the zoledronic acid as the skeleton ingredient in the preparation of the medicine for treating the osteoporosis, in the application, an extracorporeal shock wave is adopted to carry out intervention on the hollow nano-particles, and specifically, the extracorporeal shock wave is used for carrying out local in-situ breaking on the hollow nano-particles so as to perform an obvious osteoporosis treatment effect. The shell thickness of a hollow nano-hydroxyapatite particle is controlled, the responsiveness of the extracorporeal shock wave of the particle can be enhanced, local release control is realized, the particles can be broken in a specific bone zone, local bone density is improved, and an osteoporosis treatment purpose is performed.
Owner:THE THIRD MEDICAL CENT OF THE CHINESE PEOPLES LIBERATION ARMY GENERAL HOSPITAL
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