Hey Sassee,
Welcome to the forums. There's a lot of information here that will help you with your brother. You are going to find the majority of it in the forum below:
Friends and Family of Substance Abusers - SoberRecovery : Alcoholism Drug Addiction Help and Information
Your brother won't stop unless he actually wants to. I know it's hard to take in but addicts and alcoholics won't stop for their family. I never did. I had to wait until I was ready to stop. However, showing concern for him as a family may have an effect on him and make him think about it. It is a very stressful situation and there are lots of different approaches you could take. I wish you the best of luck in whatever course of action you decide to take.
Natom.