f2806dee_s__Alcohol_and_Substance_Abuse__What_it_does
[Neurotransmitter] GABA (Gamma Aminobutyric Acid) [What drugs affect it] Depressant drugs, Marijuana [What it does] 
Inhibitory neurotransmitter involved in arousal, judgment and impulsiveness
How Drugs Affect The Brain - Addictions: Alcohol and Substance Abuse
What it does