After images (also known as palinopsia) are visual perceptions that continue to appear in one's vision after exposure to the original image has ceased. They are most commonly induced under the influence of moderate dosages of psychedelic compounds, such as LSD, psilocybin, and mescaline.

An autonomous entity is the experience of perceived contact with beings that appear to be sentient in their behaviour. They are most commonly induced under the influence of heavy dosages of hallucinogenic compounds.

Brightness alteration is a distortion or change in the intensity of perceived brightness comprising a person's vision. It is most commonly induced under the influence of moderate dosages of hallucinogenic compounds, such as psychedelics, dissociatives, and cannabinoids.

Colour enhancement is a perceived intensification of the brightness and vividness of colours in the external environment. It is most commonly induced under the influence of mild dosages of psychedelic compounds, such as LSD, psilocybin, and mescaline.

Colour shifting is when objects within the environment fluidly change their colour through a continuously repeating cycle. It is most commonly induced under the influence of psychedelic compounds.

Depth perception distortions are alterations in how a person perceives the distance of various objects within their visual field. They are most commonly induced under the influence of moderate dosages of psychedelic compounds, such as LSD, psilocybin, and mescaline.

Diffraction is the experience of seeing rainbows and spectrums of colour embedded within the brighter parts of a person's visual field. It is most commonly induced under the influence of mild dosages of psychedelic compounds, such as LSD, psilocybin, and mescaline.

Drifting is the experience of the texture, shape, and general structure of objects and scenery appearing progressively warped, melted, and morphed across themselves. It is most commonly induced under the influence of moderate dosages of psychedelic compounds, such as LSD, psilocybin, and mescaline.

Geometry is the experience of a person's field of vision becoming partially or completely encompassed by fast-moving, colourful, and extremely complex geometric patterns, form constants, shapes, fractals, and colours.

Increased pareidolia is an increase in a person's ability and tendency to recognise patterns (usually faces) within vague stimuli. It is most commonly induced under the influence of mild dosages of psychedelic compounds, such as LSD, psilocybin, and mescaline.

An internal hallucination is the perception of a visual hallucination that exclusively occurs within an imagined environment that can typically only be viewed with closed eyes, similar to those found within dreams. They are most commonly induced under the influence of heavy dosages of hallucinogenic compounds, such as psychedelics, dissociatives, and deliriants.

A perspective hallucination is an alteration of the perspective through which a given internal or external hallucination is seen through. They are most commonly induced under the influence of heavy dosages of hallucinogenic compounds, such as psychedelics, dissociatives, and deliriants.

Pupil dilation can be described as the enlargement of the size of a person's pupils under normal lighting conditions. This is most commonly induced under the influence of moderate dosages of a wide variety of serotonergic compounds, such as psychedelics, dissociatives, deliriants, entactogens, various stimulants, and some antidepressants.

Settings, sceneries, and landscapes are the perceived environments in which the plot of an internal or external hallucination occurs. This effect is capable of manifesting in a seemingly infinite variety of potential places and settings. They are most commonly induced under the influence of heavy dosages of hallucinogenic compounds, such as psychedelics, dissociatives, and deliriants.

Symmetrical texture repetition is the perception of textures becoming mirrored repeatedly over their own surface in an intricate and symmetrical fashion that is consistent across itself. It is most commonly induced under the influence of mild dosages of psychedelic compounds, such as LSD, psilocybin, and mescaline.

Tracers are the experience of visual trails of varying lengths and opacity being left behind moving objects. They are most commonly induced under the influence of mild dosages of psychedelic compounds.

Visual acuity enhancement is a heightening of the clearness and clarity of vision. It is most commonly induced under the influence of mild dosages of psychedelic compounds, such as LSD, psilocybin, and mescaline.

Visual exposure to semantic concept network is the experience of percieving a seemingly infinite mass of complex interconnected geometric forms comprised entirely of innately understandable representations. These individual geometric representations are perceived to simultaneously convey every internally stored concept and memory contained within the mind.

Physical euphoria can be described as feelings of pleasure and comfort within and across one's body. This euphoria typically feels somewhat comparable to the endorphin rushes felt during states of excitement or love, the coziness of a comfortable bed, and the rush of an orgasm. It is most commonly induced under the influence of heavy dosages of a wide variety of compounds, such as opioids, stimulants, psychedelics, and GABAergics.

Appetite suppression can be described as the experience of a distinct decrease in a person's sense of hunger and appetite in a manner which can result in both a lesser desire to eat food and a decreased enjoyment of its taste. It is most commonly induced under the influence of moderate dosages of stimulant compounds, such as amphetamine, methylphenidate, nicotine, MDMA, and cocaine.

Difficulty urinating (also known as urinary retention) can be described as the experience of a decreased ability to pass urine. It is most commonly induced under the influence of heavy dosages of stimulant and opioid compounds, such as heroin, fentanyl, kratom, amphetamine, MDMA, and 4-FA.

Excessive yawning can be described as the experience of repeated, intensified, overly frequent, and spontaneous yawning despite a complete absence of genuine sedation or sleepiness. It is most commonly induced under the influence of moderate dosages of tryptamine psychedelic compounds, such as psilocybin, 4-AcO-DMT, 4-HO-MET, and ayahuasca.

Increased heart rate or tachycardia is described as a heart rate that is faster than the normal heart rate at rest. It is most commonly induced under the influence of heavy dosages of stimulating compounds, such as traditional stimulants, certain psychedelics, and certain dissociatives.

Increased libido can be described as a distinct increase in feelings of sexual desire, the anticipation of sexual activity, and the likelihood that a person will view the context of a given situation as sexual in nature. It is most commonly induced under the influence of moderate dosages of stimulant compounds, particularly dopaminergic stimulants such as methamphetamine and cocaine.

A muscle cramp can be described as an involuntary temporary contraction or over shortening of muscles which may cause severe aches and pains. They are most commonly induced under the influence of heavy dosages of stimulating psychedelic compounds, such as LSD, 2C-E, DOC, and AMT. However, they can also occur under the influence of certain GABAergic depressants such as GHB and phenibut.

Nausea can be described as a sensation of unease and discomfort in the upper stomach combined with an involuntary urge to vomit. It is most commonly induced under the influence of heavy dosages of a wide variety of compounds, such as psychedelics, opioids, GABAergics, deliriants, dissociatives, and stimulants.

Perception of bodily lightness can be described as feeling as if one's body has significantly decreased in its weight. This can result in feelings of increased energy and a general sense of bounciness due to the body seeming weightless and therefore effortless to move. It is most commonly induced under the influence of moderate dosages of dissociative compounds, such as ketamine, PCP, and DXM.

Stimulation can be described as an increase in a person's physical energy levels. It is most commonly induced under the influence of stimulant compounds, such as amphetamine, MDMA, and cocaine.

An auditory distortion is the experience of perceived alterations in how audible noises present and structure themselves. They are most commonly induced under the influence of hallucinogenic compounds.

An auditory enhancement is the experience of an increase or improvement of the acuteness and clarity of sound. They are most commonly induced under the influence of moderate dosages of psychedelic compounds, such as LSD, psilocybin, and mescaline.

An auditory hallucination is the experience of hearing spontaneous and imaginary noises. They are most commonly induced under the influence of moderate dosages of hallucinogenic compounds, such as psychedelics, deliriants, and dissociatives.

Muscle twitching can be described as the sensation of small and localised tremblings of muscle groups. These vibrations are often powerful enough to be visibly seen through the skin. It is most commonly induced under the influence of moderate dosages of stimulating psychedelic compounds such as LSD, 2C-E, DOC, and AMT.

Spontaneous tactile sensations are the experience of sensations across the body occurring without any obvious or immediate physical trigger. This results in feelings of seemingly random yet distinct tingling sensations that occur across the skin and within the body. Depending on the psychoactive substance consumed, these vary greatly in their styles of sensation.

Tactile enhancement is an overall increase in both the intensity of a person's sense of touch and their awareness of the physical sensations across their body. It is most commonly induced under the influence of moderate dosages of psychedelic compounds, such as LSD, psilocybin, and mescaline.

Cognitive euphoria (semantically the opposite of cognitive dysphoria) is medically recognized as a cognitive and emotional state in which a person experiences intense feelings of well-being, elation, happiness, excitement, and joy. It is most commonly induced under the influence of moderate dosages of opioids, entactogens, stimulants, and GABAergic depressants. However, it can also occur to a lesser extent under the influence of hallucinogenic compounds such as psychedelics, dissociatives, and cannabinoids.

Conceptual thinking is an alteration to the nature and content of one's internal thought stream. This alteration predisposes a user to think thoughts that are no longer primarily comprised of words and linear sentence structures. Instead, thoughts become equally comprised of what is perceived to be extremely detailed renditions of the innately understandable and internally stored concepts that words exist to label. It is most commonly induced under the influence of moderate dosages of hallucinogenic compounds, such as psychedelics and dissociatives.

A delusion is a false idea or belief that is held with strong conviction and subjective certainty and is inconsistent with an individual’s educational, cultural and social background. Delusions are most commonly induced under the influence of heavy dosages of hallucinogenic compounds, such as psychedelics, deliriants, and dissociatives.

Emotion intensification is an increase in a person's current emotional state beyond normal levels of intensity. It is most commonly induced under the influence of moderate dosages of psychedelic compounds, such as LSD, psilocybin, and mescaline.

Immersion enhancement is an effect that results in a pronounced increase in one's tendency to become fully captivated and engrossed by external stimuli, such as film, TV shows, video games, and various other forms of media. It is most commonly induced under the influence of moderate dosages of dissociative compounds, such as ketamine, PCP, and DXM.

Increased music appreciation is a general sense of an increased enjoyment of music. It is most commonly induced under the influence of moderate dosages of hallucinogenic compounds, such as psychedelics, dissociatives, and cannabinoids

Memory suppression is an inhibition of a person's ability to maintain a functional short and long-term memory. It is most commonly induced under the influence of moderate dosages of hallucinogenic compounds, such as psychedelics, dissociatives, and deliriants.

Novelty enhancement is a feeling of increased fascination, awe, and appreciation attributed to specific parts or the entirety of one's external environment. It is most commonly induced under the influence of moderate dosages of psychedelic compounds, such as LSD, psilocybin, and mescaline.

Personal bias suppression is a decrease in the cultural biases that a person filters their perception through. It is most commonly induced under the influence of hallucinogenic substances.

Thought acceleration (also known as racing thoughts) is the experience of thought processes being sped up significantly in comparison to that of everyday sobriety. It is most commonly induced under the influence of moderate dosages of stimulant and nootropic compounds, such as amphetamine, methylphenidate, modafinil, and MDMA.

A thought loop is the experience of becoming trapped within a chain of thoughts, actions and emotions which repeats itself over and over again in a cyclic loop. Thought loops are most commonly induced under the influence of heavy dosages of hallucinogenic compounds, such as psychedelics and dissociatives. However, they can also occur to a lesser extent under the influence of extremely heavy dosages of stimulants and benzodiazepines.

Time distortion is an effect that makes the passage of time feel wildly altered and difficult to keep track of. is most commonly induced under the influence of strong dosages of hallucinogenic compounds, such as psychedelics, dissociatives, and cannabinoids.

Scenarios and plots are the situations, stories, and events that occur within both external and internal hallucinations. They are most commonly induced under the influence of heavy dosages of hallucinogenic compounds, such as psychedelics, dissociatives, and deliriants.