Have Drugs Ran My Mom Crazy?

Well here it goes. My mother has been on drugs most of her adult life. Crack cocaine is her drug of choice. She’s been to rehab a few times, but can’t keep it together. Our relationship has always been strained. My grandparents raised me when she didn’t want to be bothered, so I just became attached to them. My granny died last year and mom has gotten worse. I recently had my 1st child and am going home (2000miles) for the first time since Granny’s death. My mom has already started causing drama and confusion in the family over who gets to see my son first. I asked her to pick him up a jacket if she found 1 and I would pay her when I got there. She said she was broke so I asked my uncle to look. My mom went ape s*** and told people I was trying con them outta clothes for my son!

WTF?

I just want to say screw it, and not even see her when we get home. Does long term drug use really kill the mind?