Hello all. My son has been acting strangely these past few weeks. This includes not wanting to communicate with me, locking himself in his room and hanging out late at night. He is 18 this year. I have seen the company he now hangs out with and am worried. There was also one night i thought i smelled pot coming from his room. Can someone help me please. What are the impacts of drug abuse on youths and how do i nip it at the bud? I do not want this to spread to my daughter who is 2 years younger.