Stimulants (non-Amphetamin)

Stimulants such as nicotine, caffeine and their derivatives promote increased wakefulness, endurance, and alertness. Side effects of some stimulants can include anxiety, insomnia, fatigue, and in some instances, neurotoxicity. With over 1 billion estimated cigarette smokers, nicotine is among the most widely used stimulants in the world. Recently, electronic nicotine inhalers known as e-cigarettes have expanded in popularity across Europe and North America as an alternative to traditional cigarettes.