Nicotinic receptor activation causes the opening of the channel formed by the receptor. This increases the Na+ movement into the target cell, leading to depolarization and generation of the action potential. This rapidly developing change, termed a fast EPSP, is illustrated in Figures 4.3, and 6.2.
And, anecdotally at least, they act as an overall stimulant, producing a titillating, awakening effect and increasing the acuity of the senses. Peppers, especially the hot capsicum (chili) peppers, produce a burning sensation on the skin and mucous membranes, including the inside of the mouth. For the uninitiated, a relatively mild hot pepper can seem intolerably strong and truly hot peppers may even cause blistering of the lips and palate.
Common symptoms of allergic reaction to pepper depend on how the pepper comes in contact with you. Since black, white and green peppers are the same fruit in different stages of processing, if you are allergic to black pepper, it will be no surprise to find you are allergic to white and green peppers as well.