Which type of drugs are classified as synthetic and stimulate the central nervous system?

The classification of drugs as synthetic stimulants that affect the central nervous system includes substances that are specifically designed and manufactured in laboratories, rather than being derived from natural sources. Amphetamines fit this description well, as they are a group of closely related compounds that are synthesized to enhance certain neurotransmitter activities in the brain, particularly those involving dopamine and norepinephrine. This results in increased alertness, concentration, and energy levels.

Amphetamines are often used in medical settings to treat conditions like ADHD (Attention Deficit Hyperactivity Disorder) and narcolepsy, but they can also be misused for their ability to enhance physical performance and productivity. Their stimulating effects can lead to a heightened state of arousal and activity, demonstrating their role as central nervous system stimulants.

Other drug options provided in the question do not fall under the category of synthetic stimulants. Cocaine, for example, is a natural stimulant derived from coca leaves and is not classified as synthetic. Opioids, by contrast, primarily act as depressants and are used for pain relief but do not stimulate the central nervous system. Barbiturates serve primarily as central nervous system depressants as well, used for their sedative properties. This context emphasizes why amphetamines are