Table 1. . Pharmacokinetic parameters of various formulations of oxycodone.

Formulations	Bioavailability	Time to peak concentration	Half-life
IV	100%	–	2–3 h
IM	100%	∼1 h	∼4.9 h
Oral	50–90%	1–1.5 h	3–5 h
Oral (extended release)	60–87%	∼2.6 h	∼8 h
Rectal	∼62%	∼2.8 h	∼3.7 h