Method for producing a composite organic compound powder for medical use

1. A method for producing a composite organic compound powder for medical use, comprising:

performing concurrent steps of

mixing a poorly water-soluble and crystalline organic compound powder, a physiologically acceptable salt, a physiologically acceptable polyol and a physiologically acceptable carboxyvinyl polymer which is a water-swellable acrylic acid-based vinyl polymer cross-linked with an allyl ether; and

finely wet-pulverizing the organic compound powder during the mixing by using an amount of the physiologically acceptable carboxyvinyl polymer effective for finely pulverizing the organic compound powder and preventing reaggregation of resulting finely pulverized powder of the poorly water-soluble and crystalline organic compound powder into a powder of larger average diameter; and

removing at least the salt and the polyol from a resulting mixture after the mixing and finely wet-pulverizing steps.

2. The method for producing a composite organic compound powder for medical use according to claim 1 , wherein

the poorly water-soluble organic compound powder, the physiologically acceptable salt and the physiologically acceptable carboxyvinyl polymer are mixed together initially,

the physiologically acceptable polyol is added to the initial mixture of the poorly water-soluble organic compound powder, the physiologically acceptable salt and the physiologically acceptable carboxyvinyl polymer, and

the mixing is continued while finely wet-pulverizing the organic compound powder and adding the physiologically acceptable polyol.

3. The method for producing a composite organic compound powder for medical use according to claim 1 , further comprising a step of adding a lecithin during or after the finely wet-pulverizing step.

4. The method for producing a composite organic compound powder for medical use according to claim 2 , further comprising a step of adding a lecithin during or after the finely wet-pulverizing step.

5. The method for producing a composite organic compound powder for medical use according to claim 1 , wherein the resulting mixture after the mixing and finely wet-pulverizing steps is in a batter form containing the finely pulverized organic compound powder and the resulting mixture is maintained in the batter form by adding the physiologically acceptable polyol dropwise.

6. The method for producing a composite organic compound powder for medical use according to claim 1 , wherein the organic compound is one or more selected from the group consisting of fenofibrate, felbinac, pranlukast hydrate, miconazole, fluticasone propionate, indomethacin, amphotericin B, aciclovir, nifedipine, nicardipine, nimodipine, dipyridamole, disopyramide, prazosin hydrochloride, prednisolone, cortisone acetate, dexamethasone, betamethasone, beclometasone dipropionate, budesonide, fluocinolone acetonide, naproxen, ketoprofen, 7-(3,5-dimethoxy-4-hydroxycinnamoylamino)-3-octyloxy-4-hydroxy-1-methyl-2(1H)-quinolinone, phenytoin, phenacemide, ethotoin, primidone, diazepam, nitrazepam, clonazepam, digitoxin, spironolactone, triamterene, chlorthalidone, polythiazide, benzthiazide, griseofulvin, nalidixic acid, chloramphenicol, chlorzoxazine, phenprobamate, mequitazine, bisbentiamine, mitomycin C, bicalutamide, paclitaxel, ubenimex, dacarbazine, fluconazole, rifampicin, triamcinolone acetonide, clemastine fumarate, zafirlukast, dihydrocholesterol, β-carotene, propyl gallate, cinnamic acid, saccharin, folic acid, and maltol.

7. The method for producing a composite organic compound powder for medical use according to claim 1 , wherein the physiologically acceptable salt is one or more selected from the group consisting of sodium chloride, potassium chloride, ammonium chloride, sodium sulfate, magnesium sulfate, potassium sulfate, calcium sulfate, sodium malate, sodium citrate, disodium citrate, sodium dihydrogen citrate, potassium dihydrogen citrate, sodium dihydrogen phosphate, potassium dihydrogen phosphate, disodium hydrogen phosphate, and dipotassium hydrogen phosphate.

8. The method for producing a composite organic compound powder for medical use according to claim 1 , wherein the polyol is glycerin, propylene glycol or polyethylene glycol.

9. The method for producing a composite organic compound powder for medical use according to claim 1 , wherein the physiologically acceptable salt is sodium chloride and the polyol is glycerin.

10. The method for producing a composite organic compound powder for medical use according to claim 1 , wherein the amount of the physiologically acceptable carboxyvinyl polymer is 0.002 to 0.9 parts by mass based on 1 part by mass of the organic compound to be finely pulverized.

11. The method for producing a composite organic compound powder for medical use according to claim 1 , wherein the initially larger average particle size of the poorly water-soluble and crystalline organic compound powder is from 1088 to 34,000 nm and the resulting average size of the poorly water-soluble and crystalline organic compound powder is from 59 to 338 nm.

12. The method for producing a composite organic compound powder for medical use according to claim 4 , wherein the initially larger average particle size of the poorly water-soluble and crystalline organic compound powder is from 1088 to 34,000 nm and the resulting average size of the poorly water-soluble and crystalline organic compound powder is from 96 to 159 nm.

13. The method for producing a composite organic compound powder for medical use according to claim 1 , wherein the resulting average size of the poorly water-soluble and crystalline organic compound powder is 400 nm or less.

14. The method for producing a composite organic compound powder for medical use according to claim 4 , wherein the resulting average size of the poorly water-soluble and crystalline organic compound powder is 400 nm or less.

15. A method for producing a composite organic compound powder for medical use, comprising:

concurrent steps of

mixing a poorly water-soluble and crystalline organic compound powder, a physiologically acceptable salt, a physiologically acceptable polyol and a physiologically acceptable carboxyvinyl polymer together and forming a mixture of the poorly water-soluble and crystalline organic compound powder, the physiologically acceptable carboxyvinyl polymer containing acrylic acid cross-linked with an ally ether; and

finely wet-pulverizing the mixture of the poorly water-soluble and crystalline organic compound powder from an initially larger average particle size to a resulting smaller average particle size; and

removing at least the physiologically acceptable salt and the polyol after the concurrent steps of mixing and finely wet-pulverizing,

wherein the concurrent steps of mixing and finely wet-pulverizing are carried out using an amount of the physiologically acceptable carboxyvinyl polymer effective for finely pulverizing the organic compound powder and preventing reaggregation of the resulting average particle size of the poorly water-soluble and crystalline organic compound powder into a larger average particle size.

16. The method for producing a composite organic compound powder for medical use according to claim 15 , wherein the amount of the physiologically acceptable carboxyvinyl polymer is 0.002 to 0.9 parts by mass based on 1 part by mass of the organic compound to be finely pulverized.

17. The method for producing a composite organic compound powder for medical use according to claim 15 , wherein the initially larger average particle size of the poorly water-soluble and crystalline organic compound powder is from 1088 to 34,000 nm and the resulting average size of the poorly water-soluble and crystalline organic compound powder is from 59 to 338 nm.

18. The method for producing a composite organic compound powder for medical use according to claim 15 , further comprising a step of adding a lecithin during or after finely wet-pulverizing step, wherein the initially larger average particle size of the poorly water-soluble and crystalline organic compound powder is from 1088 to 34,000 nm and the resulting average size of the poorly water-soluble and crystalline organic compound powder is from 96 to 159 nm.

19. The method for producing a composite organic compound powder for medical use according to claim 15 , wherein a resulting average size of the poorly water-soluble and crystalline organic compound powder is 400 nm or less.

20. The method for producing a composite organic compound powder for medical use according to claim 19 , wherein the resulting average size of the poorly water-soluble and crystalline organic compound powder is from 20 to 400 nm.

21. The method for producing a composite organic compound powder for medical use according to claim 13 , wherein a resulting average size of the poorly water-soluble and crystalline organic compound powder is from 20 to 400 nm.

22. The method for producing a composite organic compound powder for medical use according to claim 14 , wherein the resulting average size of the poorly water-soluble and crystalline organic compound powder is from 20 to 400 nm.