Abstract: A powder formulation, or pharmaceutical composition comprising or consisting of particles of an antimuscarinic agent, said particles being obtainable by supercritical anti-solvent (SAS) precipitation and having a D50 of 4 ?m or less and a D90 of 10 ?m or less. Methods of forming the formulation and composition are also disclosed, as are uses of the composition.
Type:
Grant
Filed:
May 5, 2022
Date of Patent:
September 19, 2023
Assignee:
CRYSTEC LTD
Inventors:
Daniel Mark Ledger, Linda Sharon Daintree, Peter York
Abstract: A powder formulation, or pharmaceutical composition comprising or consisting of particles of an antimuscarinic agent, said particles being obtainable by supercritical anti-solvent (SAS) precipitation and having a D50 of 4 ?m or less and a D90 of 10 ?m or less. Methods of forming the formulation and composition are also disclosed, as are uses of the composition.
Type:
Grant
Filed:
December 16, 2019
Date of Patent:
June 7, 2022
Assignee:
CRYSTEC LTD
Inventors:
Daniel Mark Ledger, Linda Sharon Daintree, Peter York
Abstract: A method for preparing an itraconazole formulation including: dissolving a mixture of itraconazole and L-ascorbic acid with a mixed solvent of dichloromethane and methanol, adding a hydroxypropyl methylcellulose and a pluronic F-127 and then dichloromethane into the mixed solvent to obtain a raw material solution; feeding a carbon dioxide into a crystallization autoclave in a supercritical fluid crystallization equipment system through a pressure regulating valve; spraying the solution into the crystallization autoclave via a spray nozzle, separating out composite particles from the solution and collecting the composite particles at a bottom of the crystallization autoclave, and encapsulating the composite particles to obtain a itraconazole formulation with decreased particle size and increased bioavailability.
Abstract: A method for preparing an itraconazole formulation including: dissolving a mixture of itraconazole and L-ascorbic acid with a mixed solvent of dichloromethane and methanol, adding a hydroxypropyl methylcellulose and a pluronic F-127 and then dichloromethane into the mixed solvent to obtain a raw material solution; feeding a carbon dioxide into a crystallization autoclave in a supercritical fluid crystallization equipment system through a pressure regulating valve; spraying the solution into the crystallization autoclave via a spray nozzle, separating out composite particles from the solution and collecting the composite particles at a bottom of the crystallization autoclave, and encapsulating the composite particles to obtain a itraconazole formulation with decreased particle size and increased bioavailability.