Timed, sustained release systems for propranolol
View Patent ↗A unit dosage form, such as a capsule or the like for delivering drugs into the body in a circadian release fashion, is comprising of one or more populations of propranolol-containing particles (beads, pellets, granules, etc.). Each bead population exhibits a pre-designed rapid or sustained release profile with or without a predetermined lag time of 3 to 5 hours. Such a circadian rhythm release cardiovascular drug delivery system is designed to provide a plasma concentration—time profile, which varies according to physiological need during the day, i.e., mimicking the circadian rhythm and severity/manifestation of a cardiovascular disease, predicted based on pharmaco-kinetic and pharmaco-dynamic considerations and in vitro/in vivo correlations.
1. A method for the treatment of hypertension comprising administering to a patient in need thereof a pharmaceutical formulation comprising:
a) a core particle comprising propranolol or a pharmaceutically acceptable salt thereof;
b) a first layer disposed over the core particle comprising a first water insoluble polymer; and
c) a second layer disposed over the first layer comprising a mixture of a second water insoluble polymer and an enteric polymer, wherein the second layer provides a lag time in propranolol blood plasma concentration of from about 2 to about 6 hours;
wherein the pharmaceutical formulation comprises about 80 mg, about 120 mg, or about 160 mg of propranolol or a pharmaceutically acceptable salt thereof, and
wherein the pharmaceutical formulation provides a maximum blood plasma concentration (C max ) between about 10 and about 14 hours following administration.
2. The method of claim 1 , wherein the pharmaceutical formulation comprises about 160 mg of propranolol or a pharmaceutically acceptable salt thereof, and provides a maximum blood plasma concentration (C max ) within the range of 80% to 125% of about 177 ng/mL of propranolol between about 10 and about 14 hours following administration and an AUC 0-T within the range of 80% to 125% of about 3417 ng·hr/mL.
3. The method of claim 1 , wherein the pharmaceutical formulation comprises about 120 mg of propranolol or a pharmaceutically acceptable salt thereof, and provides a maximum blood plasma concentration (C max ) within the range of 80% to 125% of about 130 ng/mL of propranolol between about 10 and about 14 hours following administration and an AUC 0-T within the range of 80% to 125% of about 2270 ng·hr/mL.
4. The method of claim 1 , wherein the pharmaceutical formulation comprises about 80 mg of propranolol or a pharmaceutically acceptable salt thereof, and provides a maximum blood plasma concentration (C max ) within the range of 80% to 125% of about 81 ng/mL of propranolol between about 10 and about 14 hours following administration and an AUC 0-T within the range of 80% to 125% of about 1443 ng·hr/mL.
5. The method of claim 1 , wherein the first and second water insoluble polymers are independently selected from the group consisting of ethylcellulose, polyvinyl acetate, neutral copolymers based on ethyl acrylate and methylmethacrylate, and copolymers of acrylic and methacrylic acid esters with quaternary ammonium groups.
6. The method of claim 1 , wherein the enteric polymer is selected from the group consisting of cellulose acetate phthalate, hydroxypropyl methylcellulose phthalate, hydroxypropyl methylcellulose acetate succinate, polyvinyl acetate phthalate, pH-sensitive methacrylic acid-methylmethacrylate copolymers and shellac.
7. The method of claim 1 , wherein the first and second water insoluble polymers are ethylcellulose and the enteric polymer is a pH sensitive methacrylic acid-methylmethacrylate copolymer.
8. The method of claim 1 , wherein the first and second water insoluble polymers are ethylcellulose and the enteric polymer is hydroxypropylmethylcellulose phthalate.
9. The method of claim 1 , wherein the core particles further comprise one or more dissolution rate controlling polymers selected from the group consisting of high molecular weight hydroxypropyl methylcellulose, hydroxypropyl cellulose, sodium carboxymethyl cellulose, alginic acid, polymethylmethacrylate copolymers, polyvinyl acetate/crotonic acid copolymers, ethylcellulose, and combinations thereof.
10. The method of claim 2 , wherein the first and second water insoluble polymers are ethylcellulose and the enteric polymer is hydroxypropylmethylcellulose phthalate.
11. The method of claim 3 , wherein the first and second water insoluble polymers are ethylcellulose and the enteric polymer is hydroxypropylmethylcellulose phthalate.
12. The method of claim 4 , wherein the first and second water insoluble polymers are ethylcellulose and the enteric polymer is hydroxypropylmethylcellulose phthalate.