How much oxycontin will kill someone with no tolerance?

theres this chicka i know and she tried commiting suicide. im not close to her so i dont know her friends and family and cant ask them or anything. but she said she took 53 oxycontin which i already thought was bullshit than afterwards i asked how many mgs thinking it could be like 5 mg and she had a chance. she told me 400mg pills. im pretty sure you cant get 400mg oxys. and besides that im pretty sure someone who has never taken it before has no ******* chance of taking 21200 mgs of oxy and getting to the hospital and only staying for 2 days tops. does anyone think this is a possible thing or shes just trying to act like a ?