Answer:
Alcohol
Step-by-step explanation:
Alcohol is a mimic of GABA and has huge effect on the brain, by binding to GABA receptors and inhibiting neuronal signaling. Alcohol can also inhibits other neurotransmitters. Its neurochemical effects range from short-term effects like a mild buzz to slow reaction times, making drunk driving so dangerous to long term effects like reduction in the activity of the central nervous system (CNS).