Complexes of celecoxib and its salts and derivatives, process for the preparation thereof and pharmaceutical compositions containing them

1. A stable complex comprising as active compound amorphous Celecoxib; at least one complexation agent that is vinylpyrrolidone/vinyl acetate copolymer; and at least one pharmaceutically acceptable excipient that is sodium lauryl sulfate; said complex characterized in that it

a) has a PAMPA permeability of at least 0.5×10 −6 cm/s when dispersed in FaSSIF or FeSSIF biorelevant media, which does not decrease in time at least for 1 month; and

b) has a dissolution of at least 90% at 10 minutes.

2. The complex as recited in claim 1 , wherein said complex has a controlled particle size in the range between 10 nm and 500 nm.

3. The complex as recited in claim 2 , wherein said particle size is between 10 nm and 200 nm.

4. The complex as recited in claim 1 , wherein said complex is shows earlier t max and time to onset of action when compared to the current oral formulation.

5. The complex as recited in claim 1 , wherein said complex has an increased dissolution rate compared to Celebrex®.

6. A stable complex comprising an active compound selected from the group of Celecoxib; at least one complexation agent that is copolymers of vinylpyrrolidone and vinyl-acetate; and at least one pharmaceutically acceptable excipient that is sodium lauryl sulfate; wherein said complex obtained via a mixing process.

7. The complex as recited in claim 6 , wherein said complex is obtained via a continuous flow mixing process.

8. A complex according to claim 1 comprising a complexation agent that is a copolymer of vinylpyrrolidone and vinyl acetate; and a pharmaceutically acceptable excipient that is sodium lauryl sulfate; in a total amount ranging from about 1.0 weight % to about 95.0 weight % based on the total weight of the complex.

9. The complex as recited in claim 8 wherein said complexation agent is a copolymer of vinylpyrrolidone and vinyl acetate; and pharmaceutically acceptable excipient that is sodium lauryl sulfate; comprise 50 weight % to about 95 weight % of the total weight of the complex.

10. A process for the preparation of the complex according to claim 6 , comprising the steps of mixing a solution comprising Celecoxib, and at least one complexation agent that is copolymers of vinylpyrrolidone and vinyl-acetate in a pharmaceutically acceptable solvent with an aqueous solution containing at least one pharmaceutically accepted excipient that is-sodium lauryl sulfate.

11. The process as recited in claim 10 , wherein said process is performed in a continuous flow instrument.

12. The process as recited in claim 11 , wherein said continuous flow instrument is a microfluidic flow instrument.

13. The process as recited in claim 10 , wherein said pharmaceutically acceptable solvent is chosen from methanol, ethanol, 2-propanol, 1-propanol, acetone, acetonitrile, dimethyl-sulfoxide, tetrahydrofuran, and methyl-ethyl-ketone, or combinations thereof.

14. The process as recited in claim 13 wherein said pharmaceutically acceptable solvent is chosen from methanol, 1-propanol, and 2-propanol.

15. The process as recited in claim 10 , wherein the solvent and the aqueous solution are miscible with each other.

16. The process as recited in claim 10 , wherein the aqueous solution comprises 0.1 to 99.9% weight of the final solution.

17. A pharmaceutical composition comprising the complex according to claim 1 together with pharmaceutically acceptable carrier.

18. A pharmaceutical composition comprising the complex according to claim 1 wherein said composition is suitable for oral, pulmonary, rectal, colonic, parenteral, intracisternal, intravaginal, intraperitoneal, ocular, otic, local, buccal, nasal, or topical administration.

19. The pharmaceutical composition comprising the complex according to claim 18 , wherein said composition is suitable for oral administration.

20. The pharmaceutical composition comprising the complex according to claim 19 , wherein said composition comprises liquid dispersible granules.

21. The pharmaceutical composition comprising the complex according to claim 20 , wherein said granules are suitable for the preparation of a sachet or buccal powder dosage forms.

22. A method of treatment of osteoarthritis, rheumatoid arthritis, juvenile rheumatoid arthritis, ankylosing spondylitis, acute pain especially in cancer related acute pain, primary dysmenorrhea comprising administration of a therapeutically effective amount of the complex according to claim 1 .

23. A method for reducing t max and time to onset of action when compared to the current oral formulation, said method comprising oral administration of a pharmaceutical composition according to claim 21 .

24. A stable complex comprising

a) 5-30% by weight of Celecoxib;

b) 40-80% by weight of a copolymer of vinylpyrrolidone and vinyl acetate; and

c) 1-30% by weight of sodium lauryl sulfate

wherein said complex has a controlled particle size in the range between 10 nm and 500 nm; and

wherein said complex is not obtained via a milling process, high pressure homogenization process, encapsulation process or solid dispersion processes.

25. The complex as recited in claim 1 , wherein said complex is instantaneously redispersable in physiological relevant media.

26. The complex as recited in claim 1 , wherein said complex is stable in solid form and in colloid solution and/or dispersion.

27. The complex as recited in claim 1 , wherein said complex has an apparent solubility in water of at least 1 mg/mL.