Nicotine is a highly poisonous chemical. It elevates your blood pressure and adrenaline levels, which raises your heart rate and increases your risk of a heart attack. Nicotine can cause problems with attention, learning, mood, and impulse control in the brain. It ISNT all bad at time because it could also improve mood, heart rate, and blood pressure, as well as nausea, diarrhea, memory, and alertness. Do not let the hood side affects fool you, nicotine is still bad and shouldn’t be something you do constantly