^^^ So far, there is nothing to be worried about and his 18th birthday is this fall on November 16th.
God bless you and him always!!!
Holly
P.S. Mason has already said that he doesn't do drugs and never will according to this clip here at the 1:22:51 mark. The beginning of his chat is at the 59:33 mark.
https://www.youtube.com/watch?v=KMsgjvCg-XQ&t=3720s