The duration of drowsiness from oxycodone can vary depending on the dose, formulation, and individual factors. For immediate-release (IR) forms, sleepiness usually starts within 30–60 minutes after taking the medication and may last 4–6 hours. Extended-release (ER) formulations Factors such as metabolism, age, liver function, and whether other sedating substances are used can also in... https://smithamelia75.wikibriefing.com/4061998/does_oxycodone_make_you_sleepy_common_side_effects_causes_and_safety_tips