Effects of nicotine on health
Although the amount of nicotine that enters the body is extremely small, it is still enough for smokers to become dependant on nicotine, thus developing a effect of nicotine dependency, which makes it extremely difficult for them to stop smoking.
Cigarette smoking produces a rapid distribution of nicotine to the brain, with drug levels peaking within 10 seconds of inhalation. The acute effects of nicotine dissipate in a few minutes, causing the smoker to continue dosing frequently throughout the day to maintain the drug's pleasurable effects and prevent withdrawal.
As the body becomes simultaneously relaxed and stimulated by the effects of nicotine on the brain, the body becomes more dependent and the user often feels the need to take stronger or more frequent doses.
At higher doses, such as the nicotine that can be found in some insecticide sprays, nicotine can be extremely toxic, causing vomiting, tremors, convulsions, and death. Nicotine poisoning has been reported from accidental ingestion of insecticides by adults and ingestion of tobacco products by children and pets. Death usually results in a few minutes from respiratory failure caused by paralysis.
Nicotine also negative affects on women health. Women who smoke generally have earlier menopause. If women smoke cigarettes and also take oral contraceptives, they are more prone to cardiovascular and cerebrovascular diseases than are other smokers. The effects of nicotine using during pregnancy are the greatest after the fourth month.
It's the fact that the acute effects of nicotine actually improve certain areas of short-term memory (albeit only temporarily), the long-term effects of smoking over time are what cause mental decline.
The most deleterious effects of nicotine addiction are the result of tobacco use, which accounts for one-third of all cancers.
Children are also at risk from the effects of nicotine as it can enter their systems also; it can lead to an increased risk of them developing asthma or even put young babies at risk of sudden infant death syndrome (SIDS). The inhalation of nicotine can also progress heart and arterial disease; on the whole, it is the other components of cigarettes that are harmful to physical health.