Drug delivery product for controlled drug delivery

A drug delivery product 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 is selected from metallic particles, and wherein the holes allow the drug to be released to the exterior of the shell through the holes,

• the drug delivery product further 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 the 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.