Final answer:
Users of hallucinogens often experience visual and auditory hallucinations, as well as an altered perception of time and space, among other physical effects.
Step-by-step explanation:
Effects of Hallucinogens
People who use hallucinogens often experience a range of sensory and perceptual distortions. They may have visual hallucinations such as seeing images, patterns, or colors that do not exist. Some experience auditory hallucinations, hearing sounds or voices without external stimuli. Another common effect is an altered perception of time and space; for example, time may seem to pass very slowly, and spatial dimensions may feel changed. Physical reactions can include increased energy, heart rate, and nausea.
Hallucinogens can come from natural sources, like certain plants and mushrooms, or be synthetically produced, such as LSD and PCP. These substances can lead to profound changes not only in what the user sees and hears but also in their sense of time, thought processes, emotions, and consciousness.