Formulating medications for extended release can increase the duration of action of many drugs. Describe and discuss how the coating of oral solid dosage forms can achieve extended release.

For the sources please use Aultons pharmaceutics fifth edition, Drug delivery and targeting: For pharmacists and pharmaceutical Scientists by Anya Hillery, https://pdfs.semanticscholar.org/4107/efbb389f380a8cb04f94742a262859c255e5.pdf. This is a link for a journal that you can use and you may use one more source but please use an accessible source so not something I have to purchase to get the full text for.
Please use Australian English.
and talk about the types of extended release systems available such as dissolution controlled products, erosion extended release systems, osmotic pump systems, ion exchange resins.