A member asked:

What's the difference between oxycodone immediate release and sustained-release?

A doctor has provided 1 answer

How soon it works: Immediate release starts having effect within 30 min to an hour or ingestion. It also only lasts for 3-4 hours. Sustained release has a longer onset of action, but also lasts between 8-12 hrs.

Answered 7/25/2012

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