Do drugs (amphetamines) use cause necrosis after rhinoplasty?

Just curious about this one, I have been told that using amphetamines might result in necrosis. If so, how big is the risk and how long before a rhinoplasty should one stop any? I do not use "street drugs" at all, however I have a legitimate Adderall prescription for ADD (which is made of amphetamines) and I am therefore concerned about potential risks.