Was Leah’s sister, Victoria, also addicted to drugs?

I’m watching season 7, the B season, and I’m on episode 16, “Homecoming” and Victoria has dropped a lot weight between the A and B season, she looks a wreck like Leah in this episode, has wide pupils, and her speech is slow too. I never read Leah’s book so I never knew if she mentioned Victoria also having an addiction to anything too. I never noticed it before, but since I’m bingeing a few episodes at a time it’s easier to notice how drastically Victoria changed over a few months time. Her and Leah have this weird conversation in the kitchen about Jeremy taking Addie out of town and they both seem so out of it.