Abstract:
The present invention provides a method for preparing a suspension of a pharmaceutically-active compound, the solubility of which is greater in a water-miscible first organic solvent than in a second solvent which is aqueous. The process includes the steps of : (i) dissolving a first quantity of the pharmaceutically-active compound in the water-miscible first organic solvent to form a first solution ; (ii) mixing the first solution with the second solvent to precipitate the pharmaceutically-active compound ; and (iii) seeding the first solution or the second solvent or the presuspension.
Abstract:
Pharmaceutical compositions comprising particles of lipoxygenase inhibitor compounds having an effective average size of from about 10 nm to about 50 microns are provided. More particularly, pharmaceutical compositions of particle of a 5 -lipoxygenase inhibitor compound having an effective average size of from about 50 nm to about 5 microns are provided. The pharmaceutical compositions are in the form of aqueous suspensions with the particle of the 5-lipoxygenase-inhibitor compound present in concentrations of from about 5 to about 200 mg/ml. In addition, methods for making such pharmaceutical compositions are provided. In particular, microprecipitation and direct homogenization in the presence of at least one surfactant are disclosed for making the pharmaceutical compositions.
Abstract:
The present invention provides compositions comprising dispersions of anti-retroviral agents and methods of manufacture. The nanosuspensions are made by the process of microprecipitation and energy addition. Preferably, the nanosuspensions are made by the tandem process of microprecipitation-homogenization.
Abstract:
This invention pertains to the formulation of small-particle suspensions of anticonvulsants, particularly carbamazepine, for pharmaceutical use. This invention also pertains to the formulation of a small-particle suspensions of immunosuppressive agents, particularly cyclosporin, for pharmaceutical use. The particles are coated with one or more surface modifiers.
Abstract:
The present invention provides a method of preparing particles with polymorph and size control of a pharmaceutical compound, the method including the steps of: (1) providing pharmaceutical compound in a first phase; (2) seeding the compound; (3) causing a phase change in the pharmaceutical compound to a second phase of a desired polymorphic form; and (4) wherein the mean particle size of the particles is less than 7µm. The present invention further provides a polymorphic form of itraconazole.
Abstract:
suspensão contendo uma partícula com superfície modificada, composição farmacêutica compreendendo a referida suspensão, método para aprimorar a absorção celular de um agente ativo, uso de partículas com superfície modificada, e método de preparação de uma partícula com superfície modificada. a presente invenção refere-se a partículas com superfície modificada e métodos para fabricar e usar a mesma. as partículas com superfície modificada compreendem um núcleo de partícula e um revestimento associado com o núcleo de partícula, em que o núcleo de partícula compreende um agente ativo, o revestimento compreende uma opsonina, e a partícula com superfície modificada tem um tamanho médio de aproximadamente 1 nm a aproximadamente 2.000 nm.
Abstract:
The present disclosure is directed to surface-modified particles and to methods of making and using the same. The surface-modified particles comprise a particle core and a coating associated with the particle core, wherein the particle core comprises an active agent, the coating comprises a surfactant having formula (I) or a salt thereof, and the surface-modified particle has an average size from about 1 nm to about 2,000 nm:
Abstract:
Pharmaceutical compositions comprising particles of lipoxygenase inhibitor compounds having an effective average size of from about 10 nm to about 50 microns are provided. More particularly, pharmaceutical compositions of particle of a 5-lipoxygenase inhibitor compound having an effective average size of from about 50 nm to about 5 microns are provided. The pharmaceutical compositions are in the form of aqueous suspensions with the particle of the 5-lipoxygenase inhibitor compound present in concentrations of from about 5 to about 200 mg/ml. In addition, methods for making such pharmaceutical compositions are provided. In particular, microprecipitation and direct homogenization in the presence of at least one surfactant are disclosed for making the pharmaceutical compositions.
Abstract:
A method for preparing submicron sized particles of a pharmaceutically-active compound, the solubility of which is greater in a water-miscible first solvent than in a second solvent which is aqueous is disclosed, wherein the process comprises the steps of: (i) dissolving the pharmaceutically-active compound in the water-miscible first solvent to form a solution, the first solvent being selected from the group consisting of N methyl-2-pyrrolidinone, 2-pyrrolidone, dimethyl sulfoxide, dimethylacetamide, lactic acid, methanol, ethanol, isopropanol, 3-pentanol, n-propanol, glycerol, butylene glycol, ethylene glycol, polypropylene glycol, mono- and diacylated monoglycerides, dimethyl isosorbide, acetone, dimethylformamide, 1,4-dioxane, ethyl acetate, propyl acetate, polyethylene glycol, polyethylene glycol esters, polyethylene glycol sorbitans, polyethylene glycol monoalkyl ethers, polypolypropylene glycol, polypropylene alginate, polypolypropylene glycol-10 butanediol, polypolypropylene glycol-10 methyl glucose ether, polypolypropylene glycol-20 methyl glucose ether, polypolypropylene glycol-15 stearyl ether, polypolypropylene glycol dicaprylate, polypropylene glycol dicaprate, polypropylene glycol laurate; (ii) mixing the solution with the second solvent to define a pre-suspension; and (iii) adding energy to the pre-suspension to form particles having an average effective particle size of less than about 2 micron, and said adding energy step comprises homogenization, counter-current flow homogenization, microfluidization or sonication.
Abstract:
The present invention is concerned with the formation of submicron particles of an antineoplastic agent, particularly paclitaxel, by precipitating the antineoplastic agent in an aqueous medium to form a pre-suspension followed by homogenization. Surfactants with phospholipids conjugated with a water soluble or hydrophilic polymer such as PEG are used as coating for the particles. The particles produced generally have an average particle size of less than about 1000 nm and are not rapidly soluble.