What are amphetamines primarily used for?

Amphetamines are primarily used to stimulate the central nervous system. This class of drugs enhances alertness, attention, and energy levels. They achieve this by increasing the levels of certain neurotransmitters, particularly dopamine and norepinephrine, in the brain. This stimulating effect makes amphetamines effective in treating conditions such as Attention Deficit Hyperactivity Disorder (ADHD) and narcolepsy, where increased focus and wakefulness are beneficial.

The other options represent effects that characterize different classes of drugs. For instance, depressants calm the central nervous system and reduce brain activity, analgesics provide pain relief, and substances that induce hallucinations alter perception and can lead to sensory distortions. Each of these differs fundamentally from the stimulating purpose of amphetamines. Understanding the specific effects of drugs is essential for recognizing their therapeutic uses and potential risks.