Metered dose spray device for use with macromolecular pharmaceutical agents such as insulin
A metered dose spray device administers medicine contained therein to the buccal cavity within a user's mouth upon actuation of the device. A metered dose spray device comprising an insulin solution is also provided.
1. A metered dose spray device for dispensing an effective amount of a macromolecular pharmaceutical agent against the oral mucosa of a user's mouth, comprising:
a container for housing a solution comprising a macromolecular pharmaceutical agent and a propellant,
a metering valve coupled to the container and having a metering chamber with a volume of from 100 μl to 600 μl;
an actuator coupled to the metering valve and having an actuator sump with a volume of less than 45 mm 3 , the actuator sump defining at one end thereof a discharge orifice having a diameter of about 0.58 mm to 0.62 mm in communication with the atmosphere;
wherein said metering valve is movable between a closed position in which the metering chamber is in fluid communication with the container but not the actuator sump such that a solution comprising a macromolecular pharmaceutical agent and a propellant housed in the container can flow into the metering chamber from the container, and an open position in which. the metering chamber is in fluid communication with the actuator sump but not the container such that a solution comprising a macromolecular pharmaceutical agent and a propellant contained in the metering chamber can flow into the actuator sump and be aerosolized by expansion of the propellant therein.
2. The metered dose spray device according to claim 1 , comprising a solution comprising:
an effective amount of insulin;
an alkali metal alkyl sulfate;
at least three absorption enhancing compounds selected from the group consisting of lecithin, hyaluronic acid, glycolic acid, lactic acid, chamomile extract, cucumber extract, oleic acid, linolenic acid, monoolein, monooleates, monolaurates, borage oil, evening of primrose oil, menthol, trihydroxy oxo cholanyl glycine, glycerin, polyglycerin, lysine, polylysine, triolein, polyoxyethylene ethers, polidocanol alkyl ethers, chenodeoxycholate, deoxycholate, pharmaceutically acceptable salts thereof, analogues thereof, and mixtures or combinations thereof; and
a suitable solvent;
wherein the alkali metal alkyl sulfate and absorption enhancing compounds are each present in a concentration of between about 0.1 and 20 wt./wt. % of the total composition, and the total concentration of the alkali metal alkyl sulfate and absorption enhancing compounds together is less than 50 wt./wt. % of the total composition.
3. The metered dose spray device according to claim 2 , wherein the alkali metal alkyl sulfate is in a concentration of less than about 5 wt./wt. % of the total composition.
4. The metered dose spray device according to claim 2 , wherein the alkali metal alkyl sulfate is an alkali metal C8 to C22 alkyl sulfate.
5. The metered dose spray device according to claim 4 , wherein the alkali metal C8 to C22 alkyl sulfate is sodium lauryl sulfate.
6. The metered dose spray device according to claim 2 , wherein each of said three or more absorption enhancing compounds is present in a concentration of between about 0.1 and 5 wt./wt. % of the total composition.
7. The metered dose spray device according to claim 2 , wherein the three absorption enhancing compounds are trihydroxy oxo cholanyl gylcine, polyoxyethylene ether and lecithin.
8. The metered dose spray device according to claim 2 , wherein the three absorption enhancing compounds are trihydroxy oxo cholanyl cholanyl glycine, deoxycholate and glycerin.
9. The metered dose spray device according to claim 2 , wherein the three absorption enhancing compounds are polidocanol 9 lauryl ether, polylysine and triolein.
10. The metered dose spray device according to claim 2 , wherein the pharmaceutical agent is encapsulated in an array between about 1 and 10 nanometers in size.
11. The metered dose spray device according to claim 2 , wherein said solvent is water.
12. The metered dose spray device according to claim 1 , comprising 1,1,1,2-tetrafluoroethane.
13. The metered dose spray device according to claim 1 , comprising an insulin solution and a propellant.
14. The metered dose spray device according to claim 1 , wherein said actuator sump has a volume not exceeding 37 mm 3 .
15. The metered dose spray device according to claim 1 , wherein said metering chamber has a volume of about 250 μl to 300 μl.