DELAYED RELEASE CYSTEAMINE BEAD FORMULATION, AND METHODS OF MAKING AND USING SAME
An enteric-coated bead dosage form of cysteamine, and related methods of manufacture and use, are disclosed.
1 - 20 . (canceled)
21 . An oral pharmaceutical dosage form comprising enterically-coated beads comprising cysteamine bitartrate, cystamine or pharmaceutically-acceptable salts thereof, or a combination thereof, wherein the oral dosage form is characterized by having less than 5 wt. % cystamine based on the amount of cysteamine following 18 months storage at 25° C. and 40% RH.
22 . The pharmaceutical dosage form of claim 21 , wherein the coating releases at least 80 wt. % of the cysteamine bitartrate, cystamine or pharmaceutically-acceptable salts thereof, or a combination thereof, after 20 minutes at pH 6.8.
23 . The pharmaceutical dosage form of claim 22 , wherein the release is measured using the method of USP 36-NF 31 section 711.
24 . The pharmaceutical dosage form of claim 21 , wherein the coating is between about 25% to about 31% as measured by weight gain compared to uncoated beads.
25 . The pharmaceutical dosage form of claim 21 , wherein the beads range from 0.84 mm to about 1.68 mm.
26 . The pharmaceutical dosage form of claim 25 , wherein the beads can be sieved such that 5% or less of the particles by weight are retained on a #12 mesh screen and 10% or less by weight pass through a #20 mesh screen.
27 . The pharmaceutical dosage form of claim 26 , wherein about 13% to about 16% of the beads are retained by a 850 μm sieve, about 19% to about 27% are retained by a 1180 μm sieve, about 56% to about 62% are retained by a 1000 μm sieve, and about 1% to about 3% are retained by a 1400 μm sieve.
28 . A method of treating a subject with cystinosis comprising administering a composition of claim 21 .
29 . The method of claim 28 , wherein each administration comprises an amount of cysteamine bitartrate that would yield a dose of 100 to 1000 mg cysteamine free base.
30 . The method according to claim 29 , wherein the total daily dose of cysteamine free base is up to about 2 g/m 2 body surface area.
31 . A method of preparing the composition of claim 21 , comprising coating beads of cysteamine bitartrate, cystamine or pharmaceutically-acceptable salts thereof, or a combination thereof, and an excipient with an enteric polymer to form an enteric coating, wherein the coating does not release more than 10 wt. % of the cysteamine bitartrate or cystamine after 2 hours in 0.1N HCl at 22° C.
32 . The method of claim 31 , wherein the coating is between about 25% to about 31% as measured by weight gain compared to uncoated beads.
33 . The method of claim 31 , wherein the enterically-coated beads range from 0.84 mm to about 1.68 mm.
34 . The method of claim 33 , wherein the beads can be sieved such that 5% or less of the particles by weight are retained on a #12 mesh screen and 10% or less by weight pass through a #20 mesh screen.
35 . The method of claim 34 , wherein about 13% to about 16% of the beads are retained by a 850 μm sieve, about 19% to about 27% are retained by a 1180 μm sieve, about 56% to about 62% are retained by a 1000 μm sieve, and about 1% to about 3% are retained by a 1400 μm sieve.