Crank?

So, in this book this drug crank is also called the monster. This monster changes your personality, like from good to bad, or if your already bad it make you alot worse then you really are. Which, in my opinion is what drugs do to kids. It doesn't even have to be a super bad drug, because all drugs will change how you act, how you see things, and what you do. Even though alot of people say drugs don't change them,it does. I've know people from like kindergarden til now who have changed drasticly. Now, Drugs to me isn't something you always have to take. It could be sex, self-harm, anything that is your get away thing, your outlet. And those things could change a person and again I say in my opinion. Anyways, this monster changes my character from like a good girl (Kristina) into this bad girl (Bree). Which, I know ,really happens to people, from experiences. Well, I'm pretty happy to see what happens next to my character.