Claims for Patent: 9,572,819

Summary for Patent: 9,572,819

Title:	Oral composition of celecoxib for treatment of pain
Abstract:	The present invention relates to a stable oral liquid pharmaceutical composition of celecoxib or its pharmaceutically acceptable salts thereof. The celecoxib present in the compositions as described herein do not show any precipitation when subjected in Fasted-State Simulated Gastric Fluid (FaSSGF) at pH 2.0, temperature of 37.degree. C..+-.0.5.degree. C. and under stirring at a speed of 50 rpm at least for 60 minutes. It also relates to the process of preparing and method of using said composition of celecoxib.
Inventor(s):	Baheti; Ankit (Indore, IN), Padhi; Bijay Kumar (Buguda, IN), Vakada; Supritha (Hyderabad, IN), Raghuvanshi; Rajeev Singh (Gurgaon, IN)
Assignee:	Dr. Reddy's Laboratories, Ltd. (Hyderabad, IN)
Application Number:	15/167,922
Patent Claims:	1. A stable oral liquid pharmaceutical composition, comprising a therapeutically effective amount of celecoxib, at least one solubilizer, at least one medium chain glyceride, at least one polar solvent, and at least one pharmaceutically acceptable excipient, wherein said solubilizer is present in an amount from about 35% w/w to about 45% w/w, and wherein said composition does not show any precipitation in Fasted-State Simulated Gastric Fluid (FaSSGF) at pH of 2.0, temperature of 37.degree. C..+-.0.5.degree. C. and under stirring at a speed of 50 rpm, when measured at 60 min. 2. The stable oral liquid pharmaceutical composition of claim 1, wherein the composition is essentially free of precipitation inhibitors selected from the group consisting of polyvinyl caprolactam-polyvinyl acetate-polyethylene glycol graft copolymer, polyoxyethylene-polyoxypropylene block copolymers, pluronics, polyvinylpyrrolidone, and cellulosic polymers, including hydroxypropyl cellulose and hydroxypropyl methylcellulose. 3. The stable oral liquid pharmaceutical composition of claim 1, wherein the at least one solubilizer is polyethoxylated castor oil, lauryl macrogolglyceride, or a combination thereof. 4. The stable oral liquid pharmaceutical composition of claim 1, wherein the at least one medium chain glyceride is glyceryl tricaprylate/tricaprate, glyceryl monocaprylate, or a combination thereof. 5. The stable oral liquid pharmaceutical composition of claim 1, wherein the at least one polar solvent is selected from the group consisting of propylene glycol, polyethylene glycols having a molecular weight between 400 and 1000, glycerin, C2 to C8 mono- and poly-alcohols, C7 to C18 alcohols of linear or branched configuration, water and mixtures thereof. 6. The stable oral liquid pharmaceutical composition of claim 1, wherein the therapeutically effective amount of celecoxib comprises from about 1% to about 80% celecoxib by weight, based on the total weight of the composition. 7. The stable oral liquid pharmaceutical composition of claim 1, wherein a weight ratio of the at least one solubilizer to celecoxib varies from about 4.0:1.0 to about 20:1.0. 8. The stable oral liquid pharmaceutical composition of claim 1, wherein the at least one polar solvent is present in an amount of from about 20% to about 80% by weight, based on the total weight of the composition. 9. The stable oral liquid pharmaceutical composition of claim 1, wherein a weight ratio of the at least one solubilizer to the at least one polar solvent varies from about 0.60:1.00 to about 1.8:1.00. 10. The stable oral liquid pharmaceutical composition of claim 1, wherein the at least one medium chain glyceride is present in an amount of from about 5% to about 75% by weight, based on the total weight of the composition. 11. The stable oral liquid pharmaceutical composition of claim 1, wherein the composition has a mean oil droplet size of not more than 500 nm, when tested in 250 ml of Fasted-State Simulated Gastric Fluid (FaSSGF) at pH of 2.0, temperature of 37.degree. C..+-.0.5.degree. C. and under stirring at a speed of 50 rpm. 12. The stable oral liquid pharmaceutical composition of claim 1, wherein the composition has a viscosity of from about 20 cps to about 1000 cps. 13. The stable oral liquid pharmaceutical composition of claim 1, wherein the composition has a density of from about 0.8 gm/cm.sup.3 to about 2 gm/cm.sup.3. 14. The stable oral liquid pharmaceutical composition of claim 1, wherein the composition has a transmittance of at least 40%. 15. The stable oral liquid pharmaceutical composition of claim 1, wherein the composition has a pH of from about 3 to about 7. 16. The stable oral liquid pharmaceutical composition of claim 1, wherein the therapeutically effect amount of celecoxib is at least about 40% less than conventional celecoxib in 400 mg oral capsules. 17. The stable oral liquid pharmaceutical composition of claim 16, wherein the therapeutically effect amount of celecoxib is about 240 mg. 18. The stable oral liquid pharmaceutical composition of claim 1, wherein the therapeutically effect amount of celecoxib is at least about 55% less than conventional celecoxib in 400 mg oral capsules. 19. The stable oral liquid pharmaceutical composition of claim 18, wherein the therapeutically effect amount of celecoxib is about 180 mg. 20. The stable oral liquid pharmaceutical composition of claim 1, wherein the therapeutically effect amount of celecoxib is at least about 70% less than conventional celecoxib in 400 mg oral capsules. 21. The stable oral liquid pharmaceutical composition of claim 20, wherein the therapeutically effect amount of celecoxib is about 120 mg. 22. The stable oral liquid pharmaceutical composition of claim 1, which upon oral administration to a human subject under fasting conditions, provides at least one of the following pharmacokinetic parameters: AUC.sub.(0-15min) from about 10 ngh/mL to about 80 ngh/mL; AUC.sub.(0-30min) from about 80 ngh/mL to about 400 ngh/mL; AUC.sub.(0-1hr) from about 400 ngh/mL to about 1500 ngh/mL; AUC.sub.(0-2hr) from about 1000 ngh/mL to about 4000 ngh/mL; AUC.sub.(0-t) of at least about 2000 ngh/mL; AUC.sub.(0-.infin.) of at least about 2000 ngh/mL; and T.sub.lag of not more than 8 minutes. 23. The stable oral liquid pharmaceutical composition of claim 1, wherein the composition comprises: a) a therapeutically effective amount of celecoxib; b) at least one pharmaceutically acceptable excipient; c) at least one solubilizer in an amount from about 35% w/w to about 45% w/w; and d) at least one polar solvent in an amount from about 25% w/w to about 42% w/w, wherein the solubilizer and polar solvent are present in a ratio of from about 0.60:1 to about 1.8:1; and wherein the stable oral liquid pharmaceutical composition has a viscosity of from about 20 cps to about 1000 cps, and a density of from about 0.8 gm/cm.sup.3 to about 2 gm/cm.sup.3. 24. A stable oral liquid pharmaceutical composition, comprising from about 100 mg to 250 mg of celecoxib, at least one pharmaceutically acceptable excipient, at least one solubilizer, at least one medium chain glyceride, and at least one polar solvent, wherein said solubilizer is present in an amount from about 35% w/w to about 45% w/w, and wherein the composition: a) releases no less than about 70% of the celecoxib at a period of 10 minutes; or b) releases no less than about 80% of the celecoxib at a period of 15 minutes, in 900 ml of 0.01N HCl with 0.5% sodium lauryl sulfate, when tested in a USP Type 2 apparatus with sinkers at 50 rpm and 37.degree. C. 25. A method of treating pain in a human subject, the method comprising administering to the subject a stable oral liquid pharmaceutical composition, comprising a therapeutically effective amount of celecoxib, at least one solubilizer in amount from about 35% w/w to about 45% w/w, at least one polar solvent in amount from about 25% w/w to about 42% w/w, at least one medium chain glyceride, and at least one pharmaceutically acceptable excipient, wherein the stable oral liquid pharmaceutical composition is essentially free of precipitation inhibitors. 26. The method of claim 25, wherein the pain is associated with migraine. 27. The method of claim 26, wherein the therapeutically effective amount of celecoxib is sufficient to render the subject pain free within 2 hours of administering the stable oral liquid pharmaceutical composition. 28. A stable oral pharmaceutical composition of celecoxib comprising i. therapeutically effective amount of celecoxib, at least one solubilizer, at least one medium chain glyceride; and ii. polar solvent comprising mixture of ethanol and glycerin; wherein the composition falls within the shaded region of a phase diagram, as shown in FIG. 1, wherein boundaries of a stable composition are defined by shaded region or the region between the connecting lines between the six points (a, b, c, d, e and f), wherein the composition comprises about 1% to about 80% w/w celecoxib and correspond to a weight % ratio of base composition:ethanol:glycerin of 0.200:0.024:0.712 for a, 0.200:0.376:0.360 for b, 0.200:0.400:0.336 for c, 0.536:0.400:0.000 for d, 0.900:0.036:0.00 for e and 0.900:0.00:0.036 for f. 29. The stable oral pharmaceutical composition of claim 28, wherein said therapeutically effective amount of celecoxib is at least 40% less compared to conventional celecoxib in 400 mg oral capsules.