Controlled Release Compositions Comprising a Cephalosporin for the Treatment of a Bacterial Infection
The invention relates to a controlled release composition comprising a cephalosporin that in operation delivers the drug in a pulsed or bimodal manner for the treatment of bacterial infection. The controlled release composition comprises an immediate release component and a modified release component; the immediate release component comprising a first population of cephalosporin-containing particles and the modified release component comprising a second population of cephalosporin-containing particles coated with a controlled release coating; wherein the combination of the immediate release and modified release components in operation deliver the active ingredient in a pulsed or bi-modal manner. Preferably, the cephalosporin is cefcapene pivoxil or a salt thereof which can be released from the dosage form in an erodable, diffusion and/or osmotic-controlled release profile.
1 . A controlled release antibiotic composition comprising a first population of cephalosporin-containing particles and at least one subsequent population of cephalosporin-containing particles, wherein the cephalosporin contained in the first population is substantially uncoated, and the subsequent population of cephalosporin-containing particles further comprises a modified release coating or, alternatively or additionally, a modified release matrix material, such that the composition following oral delivery to a subject delivers the cephalosporin in the first and subsequent populations in a pulsatile manner.
2 . The controlled release composition of claim 1 , wherein said cephalosporin is cefcapene pivoxil or a salt thereof.
3 . The composition according to claim 2 , wherein the first population comprises immediate-release particles and the subsequent population comprises modified-release particles.
4 . The composition according to claim 2 , wherein the first population comprises immediate-release particles and the formulation comprising the subsequent population is an erodable formulation.
5 . The composition according to claim 2 , wherein the formulation comprising the subsequent population is a diffusion controlled formulation.
6 . The composition according to claim 2 , wherein the formulation comprising the subsequent population is an osmotic controlled formulation.
7 . The composition according to claim 3 , wherein the modified release particles have a modified-release coating.
8 . The composition according to claim 3 , wherein the modified release particles comprise a modified-release matrix material.
9 . The compositions of claim 7 or 8 wherein said modified release particles are combined in formulation that releases said cefcapene pivoxil or salt thereof by erosion, diffusion or osmosis to the surrounding environment.
10 . The composition according to claim 9 , wherein at least one of the first and subsequent populations further comprises an enhancer.
11 . The composition according to claim 10 , wherein the amount of active ingredient contained in each of the first and subsequent populations is from about 0.1 mg to about 1 g.
12 . The composition according to claim 11 , wherein the first and subsequent populations have different in vitro dissolution profiles.
13 . The composition according to claim 12 , which in operation releases substantially all of the cefcapene pivoxil from the first population prior to release of the antibiotic from the subsequent population.
14 . The dosage form according to claim 13 comprising a blend of the particles of each of the first and subsequent populations contained in a hard gelatin or soft gelatin capsule.
15 . The dosage form according to claim 14 , wherein the particles of each of the populations are in the form of mini-tablets and the capsule contains a mixture of the mini-tablets.
16 . The dosage form according to claim 13 , in the form of a multilayer tablet comprising a first layer of compressed cefapene pivoxil or salt thereof-containing particles of the first population and another layer of compressed antibiotic-containing particles of the subsequent population.
17 . The dosage form according to claim 16 , wherein the first and subsequent populations of cefcapene pivoxil or salt thereof-containing particles are provided in a rapidly dissolving dosage form.
18 . The dosage form according to claim 17 , comprising a fast-melt tablet.
19 . A method for the treatment of bacterial infection comprising administering a therapeutically effective amount of a composition according to claim 2 .
20 . The composition according to claim 2 , wherein the modified-release particles comprise a pH-dependent polymer coating which is effective in releasing a pulse of the active ingredient following a time delay.
21 . The composition according to claim 20 , wherein the polymer coating comprises methacrylate copolymers.
22 . The composition according to claim 21 , wherein the polymer coating comprises a mixture of methacrylate and ammonio methacrylate copolymers in a ratio sufficient to achieve a pulse of the active ingredient following a time delay.
23 . The composition according to claim 22 , wherein the ratio of methacrylate to ammonio methacrylate copolymers is 1:1.