Answer: Drugs
Drugs can speed up the CNS aka stimulants Or slow the CNS down aka depressants
Explanation
Alcohol is a depressant so it slows the body down. Alcohol is believed to mimic GABA's effect in the brain. Alcohol binds to your GABA receptors another drug categorize that does this is benzodiazepines Alprazolam (Xanax), chlordiazepoxide (Librium), clorazepate (Tranxene), diazepam (Valium), lorazepam (Ativan). all of those drugs are just some benzodiazepines but instead of mimicking GABA, it ramps up GABA's production in the body.
Nicotine is a stimulant it speeds up the CNS Indirectly nicotine causes the release of dopamine pleasure and motivating chemical in the brain some other drugs that do that are Methamphetamine, Cocaine, Khat, Adderal, Vvyance, concerta,ritilain, MDMA and so many more