What kind of drugs distort perceptions and evoke sensory images without sensory input?

Hallucinogens are the class of drugs that distort perceptions and evoke sensory images without any external sensory input. These substances, such as LSD, psilocybin (found in magic mushrooms), and mescaline, alter an individual's perception of reality, leading to vivid visual experiences and altered states of consciousness. Users may experience sensations that seem real but are not created by actual external stimuli. This characteristic sets hallucinogens apart from other types of drugs.

Stimulants, on the other hand, increase neural activity and can enhance alertness and energy levels, but they do not primarily create sensory distortions. Similarly, opioids primarily work by relieving pain and producing feelings of euphoria and relaxation, rather than distorting sensory perception. Cannabinoids can affect mood and perception but are more commonly associated with relaxation and altered sensory perception rather than the drastic distortions often seen with hallucinogens.