Freebase isn't quite the correct term to use here. Freebasing more or less only applies to crack
. If I remember correctly, the reason for this is because crack is the "cocaine
/crack" molecule all by itself, in free base form. It is not in its salt form, usually a hydrochloride salt. When the coke
/crack molecule is in salt form, it is known as cocaine. This is done primarily to make the molecule much more soluble in water. This is why you can't inject crack in your veins and you can't smoke cocaine.
As to the actual question of whether or not you can smoke oxycodone
... no. Most of the drug
is burned and destroyed before it reaches your lungs, even if a flame isn't directly applied to it. It might be technically possible to change it to a smokable form, but I think if it was even halfway possible for the average drug user, there would be an FAQ and several threads about it.