Surface dissolution and/or bulk erosion controlled release compositions and devices

• US 20040062778A1
• Filed: 09/26/2002
• Published: 04/01/2004
• Est. Priority Date: 09/26/2002
• Status: Abandoned Application

• Current Assignee: Adi Shefer, Samuel David Shefer
• Original Assignee: Adi Shefer, Samuel David Shefer
• Inventors: Shefer, Adi, Shefer, Samuel David
• Application Number:
  US10/255,289
• Publication Number:
  US 20040062778A1
• Time in Patent Office: Days
• US Class Current: 424/400
• CPC Class Codes: A61K 49/0002 General or multifunctional contrast agents, e.g. chelated agents
• CPC Class Codes: A61K 9/1617 Organic compounds, e.g. phospholipids, fats
• CPC Class Codes: A61K 9/2013 Organic compounds, e.g. phospholipids, fats

Abstract

The present invention relates to a controlled release system comprising matrix compositions which control the lag time and release rate of the composition, as well as pharmaceutical and other active ingredients included in the composition, through surface dissolution and/or bulk erosion of the system. The controlled release system can be used to target and control the release of active ingredients onto certain regions of the gastrointestinal tract including the stomach and the small intestine. The matrix compositions of the present invention can be comprised of the following components: a wax material, fat material, water sensitive material and surface active material.

Claims

1. A composition for controlled release of an active agent comprising:

a wax material;

a fat material;

an active agent;

a water sensitive material; and

optionally a surface active material.

2. The composition of claim 1 wherein said wax material has a melting point in the range of between about 25 degrees C. and about 150 degrees C.

3. The composition of claim 1 wherein said wax material has a penetration point of about 1 to about 10.

4. The composition of claim 1 wherein said wax material is selected from the group consisting of:

natural wax, synthetic wax, regenerated wax, vegetable wax, animal wax, mineral wax, petroleum wax, microcrystalline wax and mixtures thereof.

5. The composition of claim 1 wherein said wax material controls an erosion rate of said composition.

6. The composition of claim 1 wherein said wax comprises one or more of carnauba wax, candelilla wax and beeswax.

7. The composition of claim 1 wherein said fat material is selected from the group consisting of:

hydrogenated castor oil, hydrogenated vegetable oil, hard fat, glyceride, fatty acids, fatty acid derivative, lipid, steroid and mixtures thereof.

8. The composition of claim 7 wherein said glyceride is selected from the group consisting of:

triglyceride, monoglyceride, diglyceride, glyceryl monostearate, glycerol tristearate and mixtures thereof.

9. The composition of claim 7 wherein said fatty acid derivatives are selected from the group consisting of:

alcohol, ester, anhydride, hydroxy fatty acid and prostaglandin.

10. The composition of claim 1 wherein said fat material is selected from the group consisting of:

lauric acid, physeteric acid, myristoleic acid, palmitoleic acid, petroselinic acid, oleic acid, isolauric acid, isomyristic acid, isopalmitic acid, isostearic acid, isoprenoid, 12-(((7′

-diethylaminocoumarin-3yl)carbonyl)methylamino)-octadecanoic acid, N-[12-(((7′

diethylaminocoumarin-3-yl)carbonyl)methyl-amino)octadecanoyl]-2-aminopalmitic acid, N succinyl-dioleoylphosphatidylethanol amine, palmitoyl-homocysteine, digalactosyldiglyceride, 1,2-dioleoyl-sn-glycerol;

1,2-cdipalmitoyl-sn-3 succinylglycerol;

1,3-dipalmitoyl-2-succinylglycerol and mixtures thereof.

11. The composition of claim 1 wherein said fat material is selected from the group consisting of:

phospholipid, sphingolipid, cholesterol, steroid derivative, terpene, tocopherol, stearlyamine, vitamin and mixtures thereof.

12. The composition of claim 11 wherein said phospholipid comprises:

phosphatidic acid, phosphatidyl choline, phosphatidyl ethanolamine, phosphatidylglycerol, phosphatidylserine, phosphatidylinositol, lysophosphatidyl derivative, cardiolipin, beta-acyl-y-alkyl phospholipid, phosphatidylcholines, dioleoylphosphatidylcholine, dimyristoylphosphatidylcholine, dipentadecanoylphosphatidylcholine, dilauroylphosphatidylcholine, dipalmitoylphosphatidylcholine (DPPC), distearoylphosphatidylcholine (DSPC), diarachidoylphosphatidylcholine (DAPC), dibehenoylphosphatidylcholine (DBPC), ditricosanoylphosphatidylcholine (DTPC), dilignoceroylphatidylcholine (DLPC), phosphatidylethanolamine, dioleoylphosphatidylethanolamine, 1-hexadecyl-2-palmitoylglycerophosphoethanolamine, synthetic phospholipids and mixtures thereof.

13. The composition of claim 11 wherein said steroid is selected from the group consisting of:

cholesterol, cholesterol sulfate, cholesterol hemisuccinate, 6-(5-cholesterol 3 beta-yloxy) hexyl6-amino-6-deoxy-1-thio-alpha-D-galactopyranoside, 6-(5-cholesten-3 beta-tloxy)hexyl-6-amino-6-deoxyl-1-thio-alpha-D mannopyranoside, cholesteryl(4′

-trimethyl 35 ammonio)butanoate and mixtures thereof.

14. The composition of claim 1, wherein said water sensitive material is selected from the group consisting of:

natural oligomer, synthetic oligomer, natural polymer, synthetic polymer and copolymer, starch, starch derivative, oligosaccharide, polysaccharide, hydrocolloid, natural gum, protein, cellulose, cellulose derivative and mixtures thereof.

15. The composition of claim 1, wherein said water sensitive material is selected from the group consisting of:

xylose, ribose, glucose, mannose, galactose, fructose, dextrose, polydextrose, sucrose, maltose, corn syrup, palatin, sorbitol, xylitol, mannitol, maltitol, lactitol, xanthan, maltodextrin, galactomanan, tragacanth and mixtures thereof.

16. The composition of claim 1, wherein said water sensitive material is selected from the group consisting of:

polyvinyl pyrrolidone, water soluble cellulose, polyvinyl alcohol, ethylene maleic anhydride copolymer, methylvinyl ether maleic anhydride copolymer, acrylic acid copolymer, anionic polymer of methacrylic acid and methacrylate, cationic polymer having dimethyl-aminoethyl ammonium functional groups, polyethylene oxide, water soluble polyamide, polyester and mixtures thereof.

17. The composition of claim 1, wherein said water sensitive material is selected from the group consisting of:

hydroxyethyl cellulose, carboxymethyl cellulose, hydroxymethyl cellulose, carboxymethyl cellulose, hydroxypropyl carboxymethyl cellulose, hydroxypropyl methyl carboxyethyl cellulose, hydroxypropyl carboxypropyl cellulose, hydroxybutyl carboxymethyl cellulose and mixtures thereof.

18. The composition of claim 1 wherein said composition comprises said surface active material, said surface active material has an HLB of at least about 10.

19. The composition of claim 1 wherein said composition includes said surface active material, said surface active material has an HLB value in a range of about 15 to about 50.

20. The composition of claim 1 wherein said composition comprises said surface active material, said surface active material is selected from the group consisting of:

an anionic surfactant, a cationic surfactant, a nonionic surfactant, an amphoteric surfactant and mixtures thereof.

21. The composition of claim 20 wherein said anionic surfactant comprises a carboxylate, sulfonate and sulfate ion.

22. The composition of claim 20 wherein said anionic surfactant is selected from the group consisting of:

alkyl carboxylate, acyl lactylate, alkyl ether carboxylate, N-acyl sarcosinate, polyvalent alkyl carbonate, N-acyl glutamate, fatty acid, polypeptide condensate, sulfuric acid ester and mixtures thereof.

23. The composition of claim 20 wherein said nonionic surfactant is selected from the group consisting of:

polyoxyethylene, lecithin, ethoxylated alcohol, ethoxylated ester, ethoxylated amide, polyoxypropylene, propoxylated alcohol, ethoxylated/propoxylated block polymer, propoxylated ester, alkanolamide, amine oxide, fatty acid esters of polyhydric alcohol, ethylene glycol ester, diethylene glycol ester, propylene glycol ester, glycerol ester, polyglycerol fatty acid ester, sorbitan ester, sucrose ester, glucose ester, dextrose ester, simethicone and mixtures thereof.

24. The composition of claim 1 wherein said composition comprises said surface active material, said surface active material is selected from the group consisting of:

acacia, benzalkonium chloride, cholesterol, emulsifying wax, glycerol monostearate, lanolin alcohols, lecithin, poloxamer, polyoxyethylene, castor oil derivatives and mixtures thereof.

25. The composition of claim 1 wherein said composition comprises said surface active material, said surface active material is selected from the group consisting of:

calcium sulfate, barium sulfate and sodium lauryl sulfate.

26. The composition of claim 1 further comprising a pH sensitive material, wherein said pH sensitive material releases said composition only upon trigger by an environment having a trigger pH.

27. The composition of claim 26 wherein said trigger pH is in the range of about 3 to about 12.

28. The composition of claim 26 wherein said pH sensitive material is selected from the group consisting of:

acrylate polymers with amino substituents, acrylic acid esters, polyacrylamides, phthalate derivatives and mixtures thereof.

29. The composition of claim 26 wherein said pH sensitive material is selected from the group consisting of:

acid phthalate of carbohydrate, amylose acetate phthalate, cellulose acetate phthalate, cellulose ester phthalate, cellulose ether phthalate, hydroxy propyl cellulose phthalate, hydroxypropyl ethylcellulose phthalate, hydroxypropyl methyl cellulose phthalate, methyl cellulose phthalate, polyvinyl acetate phthalate, polyvinyl acetate hydrogen phthalate, sodium cellulose acetate phthalate, starch acid phthalate, styrene-maleic acid dibutyl phthalate copolymer, styrene-maleic acid polyvinyl acetate phthalate copolymer, styrene and maleic acid copolymer, gelatin, gluten, shellac, salol, keratin, keratin sandarac-tolu, ammoniated shellac, benzophenyl salicylate, cellulose acetate trimellitate, cellulose acetate blended with shellac, hydroxypropylmethyl cellulose acetate succinate, oxidized cellulose, polyacrylic acid derivative, acrylic acid and acrylic ester copolymers, methacrylic acid, methacrylic acid ester, vinyl acetate, crotonic acid copolymer and mixtures thereof.

30. The composition of claim 26 wherein said pH sensitive material is relatively insoluble and impermeable at the pH of the stomach and is more soluble and permeable at the pH of the small intestine and colon.

31. The composition of claim 1 wherein said active agent is selected from the group consisting of:

analgesic, antihistamine, anti-emetic, anti-epileptic, vasodilator, anti-tussive agent, expectorant, anti-hypotensive, anti-inflammatory agent, anthelmintic, anti-arrhythmic agent, anti-bacterial agent, anti-viral agent, anti-coagulant, anti-depressant, anti-diabetic, anti-epileptic, anti-fungal agent, anti-gout agent, anti-hypertensive agent, anti-malarial, anti-migraine agent, anti-muscarinic agent, anti-neoplastic agent, anti-stroke agent, erectile dysfunction improvement agent, immunosuppressant, anti-protozoal agent, anti-thyroid agent, anxiolytic agent, sedative, hypnotic, neuroleptic, beta-Blocker, cardiac inotropic agent, corticosteroid, diuretic, anti-parkinsonian agent, gastro-intestinal agent, histamine receptor antagonist, keratolytic, lipid regulating agent, anti-anginal agent, cox-2-inhibitor, leukotriene inhibitor, macrolide, muscle relaxant, nutritional agent, opioid analgesic, protease inhibitor, sex hormone, muscle relaxant, anti-osteoporosis agent, anti-obesity agent, cognition enhancer, anti-urinary incontinence agent, nutritional oil, anti-benign prostate hypertrophy agent, essential fatty acid, non-essential fatty acid, antihemorrhoidal, psychotropic, antidiarrheal, mucolytic, decongestant, laxative, vitamin, stimulant, appetite suppressant, contraceptive, protein, peptide, sugar, natural agent and mixtures thereof.

32. The composition of claim 1 wherein said active agent is one or more of a pharmaceutical agent, cosmetic substance, drug or steroid.

33. The composition of claim 1 wherein said active agent is selected from the group consisting of:

antibiotic, antiviral, antigen, vaccine, vasodilator, vasoconstrictor, immunomodulatory compound, cytokine, colony stimulating factor, tumor necrosis factor, interferon, oligonucleotide, nuclease, bronchodilator, hormone, calcitonin, insulin, erthropoietin, growth hormone and mixtures thereof.

34. The composition of claim 1 wherein said active agent is delivered to the colon.

35. The composition of claim 34 wherein said active agent is selected from the group consisting of:

nonsteroidal anti-inflammatory drug (NSAID), and aspirin;

steroid, contraceptive, steroidal hormone, immunosuppressant, bronchodialators, anti-anginal, anti-hypertensive anti-spasmodic agent, anti-colitis agent, anti-arrhythmia, anti-neoplastic agent, protein, peptide drug, interferon, calcitonin, leuprolide, tumor necrosis factor, bone growth factor, melanocyte-stimulating hormone, captopril, somatostatin, somatostatin octapeptide analog, cyclosporin, renin inhibitor, superoxide dismutase, vaccine, anticoagulant, anti-migraine drug, antagonist ondasteron, menthol, antibiotic, beta-lactam, cephalosporin, macrolide, analogues for protecting the gastroduodenal mucosa from NSAID injury and mixtures thereof.

36. The composition of claim 1 wherein said active agent is delivered to an alimentary canal.

37. The composition of claim 1 wherein said active agent is delivered to the stomach and/or small intestine.

38. The composition of claim 1 wherein said active agent is delivered to the gastrointestinal tract.

39. The composition of claim 1 wherein said active agent is an imaging agent.

40. The composition of claim 39 wherein said imaging agent is one or more of barium sulfate, siatrizoate sodium iodine containing contrast agents, ultra sound contrast agents, magnetic resonance imaging contrast agents, magnetic resonance imaging enhancements, tomography agents, and positron emission agents.

41. The composition of claim 1 wherein said active agent is a monoclonal antibody marker.

42. The composition of claim 1 wherein the matrix compositions of the present invention can comprises from about 1% to about 50% by weight of wax, from about 1% to about 50% of fat, from about 1% to about 50% by weight water sensitive matrix, from about 1% to about 50% by weight active ingredients, and from about 0% to about 30% by weight surface active agents.

43. The composition of claim 1 wherein said composition dissolves or swells upon contact with moisture.

44. The composition of claim 1 wherein said active agent is encapsulated in a water sensitive microsphere.

45. The composition of claim 44 wherein said water sensitive microsphere is formed of a material selected from the group consisting of:

natural oligomer, synthetic oligomer, natural polymer, synthetic polymer and copolymer, starch, starch derivative, oligosaccharide, polysaccharide, hydrocolloid, natural gum, protein, cellulose, cellulose derivative, xylose, ribose, glucose, mannose, galactose, fructose, dextrose, polydextrose, sucrose, maltose, corn syrup, palatin, sorbitol, xylitol, mannitol, maltitol, lactitol, xanthan, maltodextrin, galactomanan or tragacanth, polyvinyl pyrrolidone, water soluble cellulose, polyvinyl alcohol, ethylene maleic anhydride copolymer, methylvinyl ether maleic anhydride copolymer, acrylic acid copolymer, anionic polymer of methacrylic acid and methacrylate, cationic polymer having dimethyl-aminoethyl ammonium functional groups, polyethylene oxide, water soluble polyamide, polyester, hydroxyethyl cellulose, carboxymethyl cellulose, hydroxymethyl cellulose, carboxymethyl cellulose, hydroxypropyl carboxymethyl cellulose, hydroxypropyl methyl carboxyethyl cellulose, hydroxypropyl carboxypropyl cellulose, hydroxybutyl carboxymethyl cellulose and mixtures thereof.

46. The composition of claim 44 wherein said water sensitive material comprises said water sensitive microsphere.

47. The composition of claim 44 wherein the water sensitive microsphere further comprises a bioadhesive material.

48. The composition of claim 44 wherein said microsphere has a size from about 2 microns to about 30 microns.

49. The composition of claim 1 wherein said active agent is encapsulated in a multicomponent carrier comprising solid hydrophobic nanospheres encapsulated in moisture sensitive or pH sensitive microspheres.

50. The composition of claim 49 wherein said active ingredients are encapsulated in said hydrophobic nano-spheres.

51. The composition of claim 49 wherein said active ingredients are encapsulated in said hydrophobic nanospheres, said moisture sensitive microspheres or pH sensitive microspheres.

52. The composition of claim 49 wherein said active ingredients are encapsulated in said hydrophobic nano-spheres, both hydrophobic nanospheres and said moisture sensitive microspheres or pH sensitive micropheres.

53. The composition of claim 49 wherein said nanospheres comprise a cationic surface active agent, anionic surface active agent, a nonionic surface active agent or a zwitterionic surface active agent.

54. The composition of claim 49 wherein said nanoparticles further comprise a bioadhesive material.

55. An article formed of the composition of claim 1.

56. The article of claim 55 wherein said article is selected from an implant, micro-implant, micro-particle, micro-sphere, micro-capsule, sheet, film, tube and medical device.

57. The article of claim 55 wherein said article is a dental bone implant.

58. The article of claim 55 wherein said article is formed by granulation, melt fabrication, extrusion, spray congealing, cryopelletization or spheronation of said composition.

59. The article of claim 55 wherein said active agent is an imaging agent that is administrable in the stomach and/or small intestine.

60. The article of claim 55 wherein said active agent is a drug that is administrable in the stomach and/or small intestine.

61. The article of claim 55 wherein said composition further comprises a device, said article being a carrier for said device.

62. The article of claim 55 wherein said device is an implant device, imaging device or medical device.

63. The article of claim 55 wherein the shape and surface area of said article controls a release rate of said active agent.

79. The composition of claim 1 wherein said active agent is encapsulated in a water sensitive microsphere.

80. The composition of claim 79 wherein said water sensitive microsphere is formed of a material selected from the group consisting of:

natural oligomer, synthetic oligomer, natural polymer, synthetic polymer and copolymer, starch, starch derivative, oligosaccharide, polysaccharide, hydrocolloid, natural gum, protein, cellulose, cellulose derivative, xylose, ribose, glucose, mannose, galactose, fructose, dextrose, polydextrose, sucrose, maltose, corn syrup, palatin, sorbitol, xylitol, mannitol, maltitol, lactitol, xanthan, maltodextrin, galactomanan, tragacanth, polyvinyl pyrrolidone, water soluble cellulose, polyvinyl alcohol, ethylene maleic anhydride copolymer, methylvinyl ether maleic anhydride copolymer, acrylic acid copolymer, anionic polymer of methacrylic acid and methacrylate, cationic polymer having dimethyl-aminoethyl ammonium functional groups, polyethylene oxide, water soluble polyamide, polyester, hydroxyethyl cellulose, carboxymethyl cellulose, hydroxymethyl cellulose, carboxymethyl cellulose, hydroxypropyl carboxymethyl cellulose, hydroxypropyl methyl carboxyethyl cellulose, hydroxypropyl carboxypropyl cellulose, hydroxybutyl carboxymethyl cellulose and mixtures thereof.

81. The composition of claim 79 wherein the water sensitive microsphere further comprises a bioadhesive material.

82. The composition of claim 79 wherein said microsphere has a size from about 2 microns to about 30 microns.

83. The composition of claim 1 wherein said active agent is encapsulated in a multicomponent carrier comprising solid hydrophobic nanospheres encapsulated in moisture sensitive or pH sensitive microspheres.

84. The composition of claim 83 wherein said active ingredients are encapsulated in said hydrophobic nano-spheres.

85. The composition of claim 83 wherein said active ingredients are encapsulated in said hydrophobic nanospheres, said moisture sensitive microspheres or pH sensitive microspheres.

86. The composition of claim 83 wherein said active ingredients are encapsulated in said hydrophobic nano-spheres, both hydrophobic nanospheres and said moisture sensitive micro spheres or pH sensitive micropheres.

87. The composition of claim 83 wherein said nanospheres comprise a cationic surface active agent, anionic surface active agent, a nonionic surface active agent or a zwitterionic surface active agent.

88. The composition of claim 83 wherein said nanoparticles further comprise a bioadhesive material.

64. A method for delivering an active substance to a preselected environment;

said method comprising introducing to said environment a control release composition, said control release comprising;

a wax material;

a fat material;

an active agent;

a water sensitive material; and

optionally a surface active material,

wherein introducing of said composition into said environment permits degradation of said composition and release of said active agent.

65. The method of claim 64 wherein said environment is the stomach or small intestine.

66. The method of claim 64 wherein said wax material is selected from the group consisting of:

natural wax, synthetic wax, regenerated wax, vegetable wax, animal wax, mineral wax, petroleum wax, microcrystalline wax and mixtures thereof.

67. The method of claim 64 wherein said fat material is selected from the group consisting of:

hydrogenated castor oil, hydrogenated vegetable oil, hard fat, glyceride, fatty acids, fatty acid derivative, lipid, steroid, phospholipid, sphingolipid, cholesterol, steroid derivative, terpene, tocopherol, stearlyamine, vitamin and mixtures thereof.

68. The method of claim 64 comprising said water sensitive material, wherein said water sensitive material is selected from the group consisting of:

natural oligomer, synthetic oligomer, natural polymer, synthetic polymer and copolymer, starch, starch derivative, oligosaccharide, polysaccharide, polyvinyl pyrrolidone, polyvinyl alcohol, hydrocolloid, natural gum, protein, cellulose, cellulose derivative and mixtures thereof.

69. The method of claim 64 wherein said composition further comprises said surface active material, said surface active material is selected from the group consisting of:

an anionic surfactant, a cationic surfactant, a nonionic surfactant, an amphoteric surfactant and mixtures thereof.

70. The method of claim 64 wherein said active agent is selected from the group consisting of:

analgesic, antihistamine, anti-emetic, anti-epileptic, vasodilator, anti-tussive agent, expectorant, anti-hypotensive, anti-inflammatory agent, anthelmintic, anti-arrhythmic agent, anti-bacterial agent, anti-viral agent, anti-coagulant, anti-depressant, anti-diabetic, anti-epileptic, anti-fungal agent, anti-gout agent, anti-hypertensive agent, anti-malarial, anti-migraine agent, anti-muscarinic agent, anti-neoplastic agent, anti-stroke agent, erectile dysfunction improvement agent, immunosuppressant, anti-protozoal agent, anti-thyroid agent, anxiolytic agent, sedative, hypnotic, neuroleptic, beta-Blocker, cardiac inotropic agent, corticosteroid, diuretic, anti-parkinsonian agent, gastro-intestinal agent, histamine receptor antagonist, keratolytic, lipid regulating agent, anti-anginal agent, cox-2-inhibitor, leukotriene inhibitor, macrolide, muscle relaxant, nutritional agent, opioid analgesic, protease inhibitor, sex hormone, muscle relaxant, anti-osteoporosis agent, anti-obesity agent, cognition enhancer, anti-urinary incontinence agent, nutritional oil, anti-benign prostate hypertrophy agent, essential fatty acid, non-essential fatty acid, antihemorrhoidal, psychotropic, antidiarrheal, mucolytic, decongestant, laxative, vitamin, stimulant, appetite suppressant, contraceptive, protein, peptide, sugar, natural agent and mixtures thereof.

71. The method of claim 64 wherein said active agent is one or more of a pharmaceutical agent, cosmetic substance, drug or steroid.

72. The method of claim 64 wherein said active agent is selected from the group consisting of:

antibiotic, antiviral, antigen, vaccine, vasodilator, vasoconstrictor, immunomodulatory compound, cytokine, colony stimulating factor, tumor necrosis factor, interferon, oligonucleotide, nuclease, bronchodilator, hormone, calcitonin, insulin, erthropoietin, growth hormone and mixtures thereof.

73. The method of claim 64 wherein said active agent is delivered to the colon.

74. The method of claim 64 wherein said active agent is delivered to an alimentary canal.

75. The method of claim 64 wherein said active agent is delivered to the stomach and/or small intestine.

76. The method of claim 64 wherein said active agent is delivered to the gastrointestinal tract.

77. The method of claim 64 wherein said active agent is an imaging agent.

78. The method of claim 64 wherein said imaging agent is one or more of barium sulfate, siatrizoate sodium and iodine containing contrast agents.

89. A method for producing a controlled release composition comprising the steps of:

(i) heating a wax material to a temperature above the melting point of the wax material to form a melt;

(ii) heating a fat material to a temperature above the melting point of the fat material to form a melt;

(iii) dissolving or dispersing a surface active agent into the melt of the wax or melt of the fat;

(iv) combining the melt of the wax with the melt of the fat;

(v) dissolving or dispersing one or more first active agents into the combined melt of the wax and fat;

(vi) optionally dissolving or dispersing one or more second encapsulated active agents into the combined melt of the wax and fat;

(vii) dispersing a water sensitive material into the combined melt of the wax and fat; and

(viii) cooling the melt to form a dry powder composition.

90. A method for producing articles formed of a controlled release composition comprising the steps of:

(i) heating a wax material to a temperature above the melting point of the wax material to form a melt;

(ii) heating a fat material to a temperature above the melting point of the fat material to form a melt;

(iii) dissolving or dispersing a surface active agent into the melt of the wax or melt of the fat;

(iv) combining the melt of the wax with the melt of the fat;

(v) dissolving or dispersing one or more first active agents into the combined melt of the wax and fat;

(vi) optionally dissolving or dispersing one or more second encapsulated active agents into the combined melt of the wax and fat;

(vii) dispersing a water sensitive material into the combined melt of the wax and fat;

(viii) cooling the melt to form a dry powder composition;

or

(ix) molding the melt into a predetermined geometric dimensions or shapes.

93. An article of manufacture formed of the composition of claim 90.

94. The composition of claim 93 wherein said device is an implant device, imaging device or a medical device.

91. A composition for controlled release of a device comprising:

a wax material;

a fat material;

an active agent;

a water sensitive material; and

said device, wherein said composition is a carrier for said device.

92. The composition of claim 91 wherein said device is an implant device, imaging device or a medical device.