Pharmaceutical compositions of donepezil having specific in vitro dissolution profile or pharmacokinetics parameters
A timed release pharmaceutical composition comprising donepezil is provided, wherein the composition exhibits the in vitro dissolution profile when tested in a Paddle dissolution apparatus at 50 rpm in 900 ml 6.8 buffer at 37° C., less than about 20% w/w of donepezil is released in 3 to 6 hrs, and more than 90% w/w of donepezil is released after 12 hrs.
1. A timed release pharmaceutical composition administered orally at night, comprising donepezil in an amount selected from 3 mg to 50 mg, wherein the composition is a coated composition, which comprises: a) a core comprising donepezil and one or more release controlling agent(s), and b) a functional coating comprising one or more release controlling agent(s) in an amount of about 1% to about 40% by total weight of the composition, wherein the composition exhibits the following in vitro dissolution profile when tested in a Paddle dissolution apparatus at 50 rpm in 900 ml 6.8 buffer at 37° C.
less than about 20% w/w of donepezil is released in 6 hrs, and
more than 90% w/w of donepezil is released after 12 hrs.
2. The timed release pharmaceutical composition according to claim 1 , when administered orally provides reduced incidence of insomnia and nightmares.
3. The timed release pharmaceutical composition according to claim 1 , when administered orally provides reduced incidence of sundowning syndrome.
4. The timed release pharmaceutical composition according to claim 1 , wherein the said composition shortens the titration period required for donepezil administration.
5. The timed release pharmaceutical composition according to claim 4 , wherein the said composition shortens the titration period required for donepezil administration by two to four weeks.
6. The timed release pharmaceutical composition according to claim 1 , wherein the said composition is used to treat a patient suffering from a disease or a condition characterized by symptoms of dementia and/or cognitive impairments.
7. The timed release pharmaceutical composition according to claim 1 , wherein the said composition is used to treat a patient suffering from mild, moderate or severe Alzheimer's disease.
8. A timed release pharmaceutical composition comprising donepezil in an amount selected from 3 mg to 50 mg, wherein the composition is a coated composition, which comprises: a) a core comprising donepezil and one or more release controlling agent(s), and b) a functional coating comprising one or more release controlling agent(s) in an amount of about 1% to about 40% by total weight of the composition, wherein the single dose AUC (2-10) of the said composition is about 55% to about 95% less than the single dose AUC (2-10) of an immediate release composition of donepezil, wherein both the compositions have the same dose of donepezil and are administered orally at night.
9. The timed release pharmaceutical composition according to claim 8 , wherein the said composition provides reduced incidence of insomnia and nightmares.
10. The timed release pharmaceutical composition according to claim 8 , wherein the said composition shortens the titration period required for donepezil administration.
11. The timed release pharmaceutical composition according to claim 8 , wherein the said composition shortens the titration period required for donepezil administration by two to four weeks.
12. The timed release pharmaceutical composition according to claim 8 , wherein the said composition is used to treat a patient suffering from a disease or a condition characterized by symptoms of dementia and/or cognitive impairments.
13. The timed release pharmaceutical composition according to claim 8 , wherein the said composition is used to treat a patient suffering from mild, moderate or severe Alzheimer's disease.
14. A timed release pharmaceutical composition comprising donepezil in an amount selected from 3 mg to 50 mg, wherein the composition is a coated composition, which comprises: a) a core comprising donepezil and one or more release controlling agent(s) in an amount of about 1% to about 40% by total weight of the composition, and b) a functional coating comprising one or more release controlling agent(s) wherein the steady state AUC (2-10) of the said composition is about 10% to about 20% less than the steady state AUC (2-10) of an immediate release composition of donepezil, wherein both the compositions have the same dose of donepezil and are administered orally at night.
15. The timed release pharmaceutical composition according to claim 14 , wherein the said composition provides reduced incidence of insomnia and nightmares.
16. The timed release pharmaceutical composition according to claim 14 , wherein the said composition shortens the titration period required for donepezil administration.
17. The timed release pharmaceutical composition according to claim 14 , wherein the said composition shortens the titration period required for donepezil administration by two to four weeks.
18. The timed release pharmaceutical composition according to claim 14 , wherein the said composition is used to treat a patient suffering from a disease or a condition characterized by symptoms of dementia and/or cognitive impairments.
19. The timed release pharmaceutical composition according to claim 14 , wherein the said composition is used to treat a patient suffering from mild, moderate or severe Alzheimer's disease.
20. A timed release pharmaceutical composition comprising donepezil in an amount selected from 3 mg to 50 mg, wherein the composition is a coated composition, which comprises: a) a core comprising donepezil and one or more release controlling agent(s), and b) a functional coating comprising one or more release controlling agent(s) in an amount of about 1% to about 40% by total weight of the composition, wherein the single dose AUC (19-22) of the said composition is about 10% to about 50% more than the single dose AUC (19-22) of an immediate release composition of donepezil, wherein both the compositions have the same dose of donepezil and are administered orally at night.
21. The timed release pharmaceutical composition according to claim 20 , wherein the said composition provides reduced incidence of sundowning syndrome.
22. The timed release pharmaceutical composition according to claim 20 , wherein the said composition is used to treat a patient suffering from a disease or a condition characterized by symptoms of dementia and/or cognitive impairments.
23. The timed release pharmaceutical composition according to claim 20 , wherein the said composition is used to treat a patient suffering from mild, moderate or severe Alzheimer's disease.
24. A timed release pharmaceutical composition comprising donepezil in an amount selected from 3 mg to 50 mg, wherein the composition is a coated composition, which comprises: a) a core comprising donepezil and one or more release controlling agent(s), and b) a functional coating comprising one or more release controlling agent(s) in an amount of about 1% to about 40% by total weight of the composition, wherein the steady state AUC (19-22) of the said composition is about 10% to about 100% more than the steady state AUC (19-22) of an immediate release composition of donepezil, wherein both the compositions have the same dose of donepezil and are administered orally at night.
25. The timed release pharmaceutical composition according to claim 24 , wherein the said composition provides reduced incidence of sundowning syndrome.
26. The timed release pharmaceutical composition according to claim 24 , wherein the said composition is used to treat a patient suffering from a disease or a condition characterized by symptoms of dementia and/or cognitive impairments.
27. The timed release pharmaceutical composition according to claim 24 , wherein the said composition is used to treat a patient suffering from mild, moderate or severe Alzheimer's disease.