What are the available methods for controlling drug release and their triggers?

[cyentist]

Hello

I read several articles about controlled drug release from patches, liposomes, etc

Can you tell me please which methods are available to control the release of a drug and what can trigger this release?

I am interested in developed available technologies rather that something experimental described in a single article.

Thanks!

 

[berkeman]

https://en.wikipedia.org/wiki/Modified-release_dosage