Compositions and methods of making brittle-matrix particles through blister pack freezing
The present invention includes compositions and methods for treating and delivering medicinal formulations using an inhaler. The composition includes a space filled flocculated suspension having one or more flocculated particles of one or more active agents and a hydrofluoroalkane propellant. A portion of the one or more flocculated particles is templated by the formation of hydrofluoroalkane droplets upon atomization and the templated floc compacts upon the evaporation of the hydrofluoroalkane propellant to form a porous particle for deep lung delivery.
1. A unit-dose delivery system for use in a dry powder inhaler comprising:
a unit-dose delivery system comprising one or more concave indentations;
a cover positioned to sealed the one or more concave indentations; and
a medicinal formulation of one or more active agents appropriate for pulmonary delivery in at least one of the one or more concave indentations, wherein the medicinal formulation comprises porous, matrix of nano-structured primary particles of one or more active agents, wherein said matrix of nano-structured primary particles of one or more active agents are formed by dissolving the one or more active agents in a solvent to form a drug/solvent mixture, rapidly freezing drug/solvent on a cryogenically cooled surface and removing the solvent from the drug/solvent mixture, further wherein, upon pulmonary delivery, the nano-structured matrix of primary particles are fractured to release primary particles or aggregates of said primary particles, both of which are smaller than the matrix of nano-structured particles, the fractured particle being appropriate for deep lung delivery.
2. The unit-dose delivery system of claim 1 , wherein the one or more active agents comprise itraconazole, voriconazole, paclitaxel, sirolimus, cyclosporin, mycophenolic acid or, or tacrolimus.
3. The unit-dose delivery system of claim 1 , wherein the one or more active agents comprise a peptide, a protein or a combination thereof.
4. The unit-dose delivery system of claim 1 , wherein the unit-dose pack is a blister pack.
5. The unit-dose delivery system of claim 1 , wherein the one or more active agents are selected from a protein, a peptide, a vasoactive peptide, an immunoglobulin, an immunomodulating protein, a hematopoietic factor, insulin, an insulin analog, amylin, an antibiotic, an antibody an antigen, an interleukin, an interferon, an erythropoietin, a heparin, a thrombolytic, an antitrypsin, an enzyme, an anti-protease, a hormone, a growth factor, a nucleic acid, an oligonucleotide, an antisense agent and mixtures thereof.
6. The unit-dose delivery system of claim 1 , wherein the one or more active agents comprise natamycin, flucytosine, miconazole, fluconazole, itraconazole, clotrimazole, econazole, miconazole, ravuconazole, oxiconazole, sulconazole, terconazole, tioconazole, fenticonazole, bifonazole, oxiconazole, ketoconazole, isoconazole, tolnaftate, amorolfine, terbinafine, voriconazol, posaconazol, tacrolimus or the pharmacologically acceptable salts, metal complexes or mixture thereof.
7. The unit-dose delivery system of claim 1 , wherein the particles of one or more active agents exhibit a Carr's Index of greater than 20.
8. The unit-dose delivery system of claim 7 , wherein the particles of one or more active agents exhibit a Carr's Index of greater than 35.
9. The unit-dose delivery system of claim 1 , wherein the porous particles have skeletal densities equal or less than 0.1 g/mL.
10. The unit-dose delivery system of claim 9 , wherein the porous particles have skeletal densities equal to or less than 0.05 g/mL.
11. The unit-dose delivery system of claim 1 , wherein the primary particles or aggregates of said primary particles comprise particles having an aerodynamic diameter of between 2 and 5 microns.