Nicotine

Nicotine is a potent alkaloid found in several flowering  plants and is a stimulant drug. This drug is addictive. In lesser doses (an average cigarette yields about 2 mg of absorbed drug), the substance acts as a stimulant in mammals, while high amounts (50–100 mg) can be harmful. This stimulant effect is a contributing factor to the addictive properties of tobacco smoking. Nicotine’s addictive nature includes psychoactive...