I would not suggest it. Overdosing is a possibility.
um I have been perscribed them but not to be taken together at the exact same time. More like take my Vicoden and then if I am still in pain take my oxy for the breakthrough.
Obviously you should take the medications as prescribed by your physician. If he/she ordered them to be taken together then do so. If he did not then don't take them together.
What's missing here is to follow the directions of your prescribing physician. If you have questions you should contact his office and/or your pharmacist.
Best of luck to you,
~Tuck