Can 1 pill of oxycodone kill you?

I having this REALLY bad toothache right now and my mom uses oxycodone for her toothache sometimes, she told me that i should take one pill tonight before i go to bed. I'm just trying to find out more about it because i know it is addictive and i don't plan to use it ever again unless it is prescribed to me. It is just going to be a one time thing. I am 16 by the way. Can it kill me? is it only for adults?