👉 Nicotine is a chemical compound that plays a crucial role in the human nervous system and has been used for centuries. It can be found as a psychoactive drug, which means it affects the central and peripheral nervous systems. Nicotine is primarily produced by tobacco plants and is known to act as both an excitatory and a inhibitory neurotransmitter. Nicotine acts as a primary stimulant, stimulating the release of dopamine and norepinephrine in the brain, which can lead to various effects