The pleasure feeling generated by nicotine is similar to that caused by cocaine and heroin, thus causing the addiction associated with the need to sustain high dopamine levels. Smoking has been reported to make you feel relax, calm, and alert.
Even concentration and memory are increased, but all nicotine effects will only last from anywhere between 5 minutes to 2 hours. To sustain the pleasant effects, a smoker would have to puff an average of 20 cigarettes in 24 hours.
Quick puffs by smokers produces a stimulating effect, whereas deep puffs produces a relaxing effect. This is because quick puffs produce low blood nicotine levels, whereas deep puffs depresses the passage of nerve impulses, producing a mild sedative effect.
Know that nicotine on its own does not promote development of cancer. However, nicotine suppresses apoptosis, an automatic process by the body to remove mutated or damaged cells that may become cancerous. This leads to encourage cancer cells to develop.
Many research has been carried out on the risk lowering affects of nicotine towards Parkinson’s Disease. Parkinson’s Disease happens when dopamine in the brain is less than acetylcholine. Nicotine decreases acetylcholine levels.