Pharmaceutically effective composition for controlled drug delivery

1. A pharmaceutically effective composition comprising sustained release particles, each sustained release particle comprising a shell and a core, wherein the shell comprises a first material and a second material, the second material comprising a first biodegradable material, wherein the core is enclosed by the shell and the core comprises a drug, wherein the first material is distributed in a matrix of the first biodegradable material, wherein the first material is configured to create holes in the shell and comprises an iron-containing polymer, wherein the holes allow the drug to be released to the exterior of the shell through the holes, and wherein the pharmaceutically effective composition comprises a targeting material or a targeting molecule that binds to a certain organ, an object or a specific site within a body of a human or an animal.

2. The pharmaceutically effective composition of claim 1 , wherein the iron-containing polymer comprises iron-containing particles.

3. The pharmaceutically effective composition of claim 1 , wherein the second material further comprises a second biodegradable material that biodegrades faster than the first biodegradable material over time.

4. The pharmaceutically effective composition of claim 1 , wherein the first material and the second material further comprise a polymer.

5. A pharmaceutically effective composition comprising sustained release particles, each sustained release particle comprising a shell and a core, wherein the shell comprises a first material and a second material, the second material comprising a first biodegradable material, wherein the core is enclosed by the shell and the core comprises a drug, wherein the first material is distributed in a matrix of the first biodegradable material, wherein the first material is configured to create holes in the shell, wherein the holes allow the drug to be released to the exterior of the shell through the holes, and wherein the pharmaceutically effective composition comprises a targeting material or a targeting molecule that binds to cells of a particular type of cancer, wherein the first material comprises an iron-containing polymer.

6. The pharmaceutically effective composition of claim 1 , wherein the core comprises an emulsion of the drug and a polymer.

7. The pharmaceutically effective composition of claim 1 , wherein the core comprises drug-containing beads.

8. The pharmaceutically effective composition of claim 1 , wherein the sustained release particles comprise beads, each bead comprising the shell and the core.

9. The pharmaceutically effective composition of claim 1 , wherein the pharmaceutically effective composition is biodegradable in a body of a human or an animal.

10. The pharmaceutically effective composition of claim 1 , wherein the sustained release particles are embedded in a biodegradable polymer matrix or a biodegradable foam.

11. The pharmaceutically effective composition of claim 10 , wherein the biodegradable polymer matrix or the biodegradable foam comprises a biodegradable sol-gel or a biodegradable thermoplastic polymer.

12. The pharmaceutically effective composition of claim 3 , wherein the second material further comprises a third biodegradable material.

13. The pharmaceutically effective composition of claim 12 , wherein the first biodegradable material, the second biodegradable material and the third biodegradable material have different compositions.

14. The pharmaceutically effective composition of claim 1 , wherein the pharmaceutically effective composition contains an ingredient that prevents the pharmaceutically effective composition from being taken up by a host defense in a human or an animal.

15. The pharmaceutically effective composition of claim 1 , wherein the iron-containing polymer is configured to form holes in the shell, before or after implanting or attaching the pharmaceutically effective composition in or on a body of a human or an animal, when the shell is exposed to an external stimulus.

16. The pharmaceutically effective composition of claim 1 , wherein the iron-containing polymer comprises molecular iron or iron platinum particles.

17. The pharmaceutically effective composition of claim 16 , wherein the molecular iron comprises iron oxide.

18. A drug delivery product comprising the pharmaceutically effective composition of claim 1 , the drug delivery product comprising: an inner region, wherein the sustained release particles are enclosed in the inner region, and a skin or barrier layer at least partially surrounding the inner region; wherein the drug delivery product is substantially biodegradable when the drug delivery product is implanted within a body of a human or an animal such that the drug delivery product does not have to be removed from the body and is substantially biodegraded in the body, and wherein the skin or barrier layer controls a flow of the drug from the drug delivery product to a region outside of the drug delivery product such that the drug delivery product when implanted within the body provides a controlled delivery of the drug into the body.

19. The drug delivery product of claim 18 , wherein a time for biodegradability of the sustained release particles is shorter than a time for biodegradability of a biodegradable polymer matrix or a biodegradable foam in which the sustained release particles are embedded, and a time for biodegradability of the biodegradable polymer matrix or the biodegradable foam is shorter than a time for biodegradability of the skin or barrier layer surrounding the biodegradable polymer matrix or the biodegradable foam.

20. The pharmaceutically effective composition of claim 5 , wherein the iron-containing polymer comprises iron-containing particles.