The Pathway. 1  Air enters the nostrils. 2  passes through the nasopharynx, 3  the oral pharynx.  through the 1  glottis. into the trachea.  into the right and left bronchi, which branches and rebranches 1  into. bronchioles, each of which terminates in a cluster  of. alveoli.
As the body adjusts to less caffeine, these symptoms should subside. Nicotine May Cause Less Sleep. Nicotine is also a stimulant, and nicotine side effects can cause insomnia and withdrawal symptoms similar to caffeine. Smoking may also create other sleep disturbances.
What this means is that a customer who only smoked 10 cigarettes a day, will be using the nicotine level better suited to a 40-a-day smoker. Using the wrong strength nicotine can lead to a nicotine overdose which can cause nausea, headaches, insomnia, vivid dreams, fast pulse and many other side effects.