Delivery of alprazolam, estazolam, midazolam or triazolam through an inhalation route
First Claim
1. A composition for delivery of alprazolam consisting of a condensation aerosol a) formed by volatilizing a thin layer of alprazolam on a solid support, having the surface texture of a metal foil, to a temperature sufficient to produce a heated vapor of alprazolam and condensing the heated vapor of alprazolam to form condensation aerosol particles, b) wherein said condensation aerosol particles are characterized by less than 5% alprazolam degradation products, and c) the condensation aerosol has an MMAD of less than 3 microns.
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Abstract
The present invention relates to the delivery of alprazolam, estazolam, midazolam or triazolam through an inhalation route. Specifically, it relates to aerosols containing alprazolam, estazolam, midazolam or triazolam that are used in inhalation therapy. In a method aspect of the present invention, alprazolam, estazolam, midazolam or triazolam is administered to a patient through an inhalation route. The method comprises: a) heating a thin layer of alprazolam, estazolam, midazolam or triazolam, on a solid support to form a vapor; and, b) passing air through the heated vapor to produce aerosol particles having less than 5% drug degradation products. In a kit aspect of the present invention, a kit for delivering alprazolam, estazolam, midazolam or triazolam through an inhalation route is provided which comprises: a) a thin coating of an alprazolam, estazolam, midazolam, or triazolam composition and b) a device for dispensing said thin coating as a condensation aerosol.
125 Citations
28 Claims
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1. A composition for delivery of alprazolam consisting of a condensation aerosol
a) formed by volatilizing a thin layer of alprazolam on a solid support, having the surface texture of a metal foil, to a temperature sufficient to produce a heated vapor of alprazolam and condensing the heated vapor of alprazolam to form condensation aerosol particles, b) wherein said condensation aerosol particles are characterized by less than 5% alprazolam degradation products, and c) the condensation aerosol has an MMAD of less than 3 microns.
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5. A composition for delivery of estazolam consisting of a condensation aerosol
a) formed by volatilizing a thin layer of estazolam on a solid support, having the surface texture of a metal foil, to a temperature sufficient to produce a heated vapor of estazolam and condensing the heated vapor of estazolam to form condensation aerosol particles, b) wherein said condensation aerosol particles are characterized by less than 5% estazolam degradation products, and c) the condensation aerosol has an MMAD of less than 3 microns.
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9. A composition for delivery of midazolam consisting of a condensation aerosol
a) formed by volatilizing a thin layer of midazolam on a solid support, having the surface texture of a metal foil, to a temperature sufficient to produce a heated vapor of midazolam and condensing the heated vapor of midazolam to form condensation aerosol particles, b) wherein said condensation aerosol particles are characterized by less than 5% midazolam degradation products, and c) the condensation aerosol has an MMAD of less than 3 microns.
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13. A composition for delivery of triazolam consisting of a condensation aerosol
a) formed by volatilizing a thin layer of triazolam on a solid support, having the surface texture of a metal foil, to a temperature sufficient to produce a heated vapor of triazolam and condensing the heated vapor of triazolam to form condensation aerosol particles, b) wherein said condensation aerosol particles are characterized by less than 5% triazolam degradation products, and c) the condensation aerosol has an MMAD of less than 3 microns.
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17. A method of producing alprazolam in an aerosol form comprising:
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a. heating a thin layer of alprazolam on a solid support, having the surface texture of a metal foil, to a temperature sufficient to volatilize the alprazolam to form a heated vapor of the alprazolam, and b. during said heating, passing air through the heated vapor to produce aerosol particles of the alprazolam comprising less than 5% alprazolam degradation products, and an aerosol having an MMAD of less than 3 microns. - View Dependent Claims (18, 19)
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20. A method of producing estazolam in an aerosol form comprising:
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a. heating a thin layer of estazolam on a solid support, having the surface texture of a metal foil, to a temperature sufficient to volatilize the estazolam to form a heated vapor of the estazolam, and b. during said heating, passing air through the heated vapor to produce aerosol particles of the estazolam comprising less than 5% estazolam degradation products, and an aerosol having an MMAD of less than 3 microns. - View Dependent Claims (21, 22)
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23. A method of producing midazolam in an aerosol form comprising:
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a. heating a thin layer of midazolam on a solid support, having the surface texture of a metal foil, to a temperature sufficient to volatilize the midazolam to form a heated vapor of the midazolam, and b. during said heating, passing air through the heated vapor to produce aerosol particles of the midazolam comprising less than 5% midazolam degradation products, and an aerosol having an MMAD of less than 3 microns. - View Dependent Claims (24, 25)
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26. A method of producing triazolam in an aerosol form comprising:
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a. heating a thin layer of triazolam on a solid support, having the surface texture of a metal foil, to a temperature sufficient to volatilize the triazolam to form a heated vapor of the triazolam, and b. during said heating, passing air through the heated vapor to produce aerosol particles of the triazolam comprising less than 5% triazolam degradation products, and an aerosol having an MMAD of less than 3 microns. - View Dependent Claims (27, 28)
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Specification