Final answer:
Stimulants increase neural activity and can be physically addictive, with dangerous cardiovascular side effects.
Explanation:
Stimulants are drugs that tend to increase overall levels of neural activity, acting as agonists of the dopamine neurotransmitter system. These drugs include caffeine, nicotine, cocaine, amphetamines, cathinones, MDMA, and more. Stimulants can be physically addictive, with nicotine being considered more addictive than heroin, and can have dangerous side effects on the cardiovascular system.
Learn more about Stimulants here:
https://brainly.com/question/40712779
