Strange: I have never heard of "percavet." Maybe you are referring to Percocet, which is a combination of oxycodone and acetaminophen. If so, for the immediate release formulation, most of the oxycodone will be excreted from your body within 8 hours of taking it. I hope you have a VERY good reason for taking this medication. Otherwise, the prescribing doctor may be causing more harm than benefit to you.
Answered 11/6/2015
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