Delivery of antipsychotics through an inhalation route

Details Delivery of antipsychotics through an inhalation route Delivery of antipsychotics through an inhalation route

2002-05-20

2004-04-06

Hartley, Michael G. (Department: 1616)

Drug, bio-affecting and body treating compositions

Effervescent or pressurized fluid containing

Organic pressurized fluid

C424S046000, C424S780000, C514S958000, C128S203150, C128S200140

Reexamination Certificate

active

06716416

ABSTRACT:

FIELD OF THE INVENTION
The present invention relates to the delivery of antipsychotics through an inhalation route. Specifically, it relates to aerosols containing antipsychotics that are used in inhalation therapy.
BACKGROUND OF THE INVENTION
There are a number of compositions currently marketed for the treatment of psychosis. The compositions contain at least one active ingredient that provides for observed therapeutic effects. Among the active ingredients given in antipsychotic compositions are olanzapine, trifluoperazine, haloperidol, loxapine, risperidone, clozapine, quetiapine, promazine, thiothixene, chlorpromazine, droperidol, prochlorperazine, and fluphenazine.
It is desirable to provide a new route of administration for antipsychotics that rapidly produces peak plasma concentrations of active compound. The provision of such a route is an object of the present invention.
SUMMARY OF THE INVENTION
The present invention relates to the delivery of antipsychotics through an inhalation route. Specifically, it relates to aerosols containing antipsychotics that are used in inhalation therapy.
In a composition aspect of the present invention, the aerosol comprises particles comprising at least 5 percent by weight of an antipsychotic. Preferably, the particles comprise at least 10 percent by weight of an antipsychotic. More preferably, the particles comprise at least 20 percent, 30 percent, 40 percent, 50 percent, 60 percent, 70 percent, 80 percent, 90 percent, 95 percent, 97 percent, 99 percent, 99.5 percent or 99.97 percent by weight of an antipsychotic.
Typically, the aerosol has a mass of at least 10 &mgr;g. Preferably, the aerosol has a mass of at least 100 &mgr;g. More preferably, the aerosol has a mass of at least 200 &mgr;g.
Typically, the particles comprise less than 10 percent by weight of antipsychotic degradation products. Preferably, the particles comprise less than 5 percent by weight of antipsychotic degradation products. More preferably, the particles comprise less than 2.5, 1, 0.5, 0.1 or 0.03 percent by weight of antipsychotic degradation products.
Typically, the particles comprise less than 90 percent by weight of water. Preferably, the particles comprise less than 80 percent by weight of water. More preferably, the particles comprise less than 70 percent, 60 percent, 50 percent, 40 percent, 30 percent, 20 percent, 10 percent, or 5 percent by weight of water.
Typically, at least 50 percent by weight of the aerosol is amorphous in form, wherein crystalline forms make up less than 50 percent by weight of the total aerosol weight, regardless of the nature of individual particles. Preferably, at least 75 percent by weight of the aerosol is amorphous in form. More preferably, at least 90 percent by weight of the aerosol is amorphous in form.
Typically, the aerosol particles have a mass median aerodynamic diameter of less than 5 microns. Preferably, the particles have a mass median aerodynamic diameter of less than 3 microns. More preferably, the particles have a mass median aerodynamic diameter of less than 2 or 1 micron(s).
Typically, the geometric standard deviation around the mass median aerodynamic diameter of the aerosol particles is less than 3.0. Preferably, the geometric standard deviation is less than 2.5. More preferably, the geometric standard deviation is less than 2.1.
Typically, the aerosol is formed by heating a composition containing an antipsychotic to form a vapor and subsequently allowing the vapor to condense into an aerosol.
Typically, the antipsychotic is a typical antipsychotic or an atypical antipsychotic.
In another composition aspect of the present invention, the aerosol comprises particles comprising at least 5 percent by weight of olanzapine, trifluoperazine, haloperidol, loxapine, risperidone, clozapine, quetiapine, promazine, thiothixene, chlorpromazine, droperidol, prochlorperazine, or fluphenazine. Preferably, the particles comprise at least 10 percent by weight of olanzapine, trifluoperazine, haloperidol, loxapine, risperidone, clozapine, quetiapine, promazine, thiothixene, chlorpromazine, droperidol, prochlorperazine, or fluphenazine. More preferably, the particles comprise at least 20 percent, 30 percent, 40 percent, 50 percent, 60 percent, 70 percent, 80 percent, 90 percent, 95 percent, 97 percent, 99 percent, 99.5 percent or 99.97 percent by weight of olanzapine, trifluoperazine, haloperidol, loxapine, risperidone, clozapine, quetiapine, promazine, thiothixene, chlorpromazine, droperidol, prochlorperazine, or fluphenazine.
Typically, the aerosol has a mass of at least 10 &mgr;g. Preferably, the aerosol has a mass of at least 100 &mgr;g. More preferably, the aerosol has a mass of at least 200 &mgr;g.
Typically, the particles comprise less than 10 percent by weight of olanzapine, trifluoperazine, haloperidol, loxapine, risperidone, clozapine, quetiapine, promazine, thiothixene, chlorpromazine, droperidol, prochlorperazine, or fluphenazine degradation products. Preferably, the particles comprise less than 5 percent by weight of olanzapine, trifluoperazine, haloperidol, loxapine, risperidone, clozapine, quetiapine, promazine, thiothixene, chlorpromazine, droperidol, prochlorperazine, or fluphenazine degradation products. More preferably, the particles comprise less than 2.5, 1, 0.5, 0.1 or 0.03 percent by weight of olanzapine, trifluoperazine, haloperidol, loxapine, risperidone, clozapine, quetiapine, promazine, thiothixene, chlorpromazine, droperidol, prochlorperazine, or fluphenazine degradation products.
Typically, the particles comprise less than 90 percent by weight of water. Preferably, the particles comprise less than 80 percent by weight of water. More preferably, the particles comprise less than 70 percent, 60 percent, 50 percent, 40 percent, 30 percent, 20 percent, 10 percent, or 5 percent by weight of water.
Typically, at least 50 percent by weight of the aerosol is amorphous in form, wherein crystalline forms make up less than 50 percent by weight of the total aerosol weight, regardless of the nature of individual particles. Preferably, at least 75 percent by weight of the aerosol is amorphous in form. More preferably, at least 90 percent by weight of the aerosol is amorphous in form.
Typically, where the aerosol comprises olanzapine, the aerosol has an inhalable aerosol drug mass density of between 0.2 mg/L and 20 mg/L. Preferably, the aerosol has an inhalable aerosol drug mass density of between 0.5 mg/L and 10 mg/L. More preferably, the aerosol has an inhalable aerosol drug mass density of between 1 mg/L and 5 mg/L.
Typically, where the aerosol comprises trifluoperazine, the aerosol has an inhalable aerosol drug mass density of between 0.2 mg/L and 10 mg/L. Preferably, the aerosol has an inhalable aerosol drug mass density of between 0.5 mg/L and 8 mg/L. More preferably, the aerosol has an inhalable aerosol drug mass density of between 1 mg/L and 5 mg/L.
Typically, where the aerosol comprises haloperidol, the aerosol has an inhalable aerosol drug mass density of between 0.2 mg/L and 10 mg/L. Preferably, the aerosol has an inhalable aerosol drug mass density of between 0.5 mg/L and 8 mg/L. More preferably, the aerosol has an inhalable aerosol drug mass density of between 1 mg/L and 5 mg/L.
Typically, where the aerosol comprises loxapine, the aerosol has an inhalable aerosol drug mass density of between 2 mg/L and 100 mg/L. Preferably, the aerosol has an inhalable aerosol drug mass density of between 5 mg/L and 80 mg/L. More preferably, the aerosol has an inhalable aerosol drug mass density of between 10 mg/L and 50 mg/L.
Typically, where the aerosol comprises risperidone, the aerosol has an inhalable aerosol drug mass density of between 0.1 mg/L and 5 mg/L. Preferably, the aerosol has an inhalable aerosol drug mass density of between 0.2 mg/L and 3 mg/L. More preferably, the aerosol has an inhalable aerosol drug mass density of between 0.4 mg/L and 2 mgL.
Typically, where the aerosol comprises clozapine, the aerosol has an inhalable aerosol drug mass density of between 2 mg/L and 200 mg/L. Preferably, the aerosol has

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