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.

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.

An external hallucination is the perception of a visual hallucination that displays itself seamlessly into the external environment as if it were physically present. They are most commonly induced under the influence of heavy dosages of deliriant compounds.

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.

Scenery slicing is the experience of a person's visual field appearing to split into separate, cleanly cut sections. These individual slices then proceed to drift slowly away from their original position before disappearing and resetting to normal. It is most commonly induced under the influence of moderate dosages of dissociative compounds, such as ketamine, PCP, and DXM.

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.

Transformations are the experience of a perceived visual metamorphosis that specific parts of one's external environment undergo as they shapeshift into other objects. They are most commonly induced under the influence of moderate dosages of psychedelic compounds, such as LSD, psilocybin, and mescaline.

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 inner mechanics of consciousness is the experience of being exposed to a mass of visual geometry comprised entirely of innately readable representations which subjectively feel as if they convey the inner mechanics that compose all underlying neurological processes.

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.

Bodily control enhancement can be described as feeling as if there has been a distinct increase in a person's ability to control their physical body with precision, balance, coordination, and dexterity. It is most commonly induced under the influence of moderate dosages of stimulating psychedelics, such as LSD, 2C-B, and DOC.

Changes in felt bodily form can be described as feelings of the body shifting in its perceived physical shape, organization and form in a manner which is typically devoid of accompanying visual alterations. They are most commonly induced under the influence of heavy dosages of hallucinogenic compounds, such as psychedelics, dissociatives, and Salvinorin A.

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 blood pressure can be described as a condition in which the pressure in the systemic arteries is elevated to abnormal levels. It is most commonly induced under the influence of heavy dosages of deliriants and vasoconstricting compounds, such as traditional stimulants and stimulating psychedelics.

Increased bodily temperature or pyrexia can be described as having a body temperature which is above normal baseline. It is most commonly induced under the influence of heavy dosages of stimulant compounds which affect serotonin and 5-HT receptors, dopamine and D receptors and norepinephrine.

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.

Increased perspiration, or hyperhidrosis, can be described as a condition characterized by increased sweat which is in excess of that required for the regulation of body temperature. It is most commonly induced under the influence of stimulants, psychedelics, and benzodiapine or alcohol withdrawals.

Increased salivation can be described as the production and excretion of excess saliva within the mouth, which may also be caused by decreased clearance of saliva. It is most commonly induced under the influence of heavy dosages of psychedelic tryptamine compounds, such as psilocybin, 4-AcO-DMT, and 4-HO-MET.

Laughter fits can be described as the experience of uncontrollable, intense, and spontaneous laughter which continue to occur despite a lack of any identifiable trigger or a feeling of humorousness. They are most commonly induced under the influence of moderate dosages of psychedelic and dissociative compounds, such as LSD, psilocybin, and nitrous oxide.

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.

An epileptic seizure (colloquially a fit) can be described as a brief episode of signs and/or symptoms which are due to abnormal, excessive, or synchronous neuronal activity in the brain. They are most commonly induced under the influence of withdrawals from prolonged chronic benzodiazepine or alcohol usage.

Stamina enhancement can be described as an increased ability to engage in physically and mentally taxing activities without the development of fatigue. It most commonly occurs under the influence of stimulants such as amphetamine and specific psychedelics such as LSD.

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.

Temperature regulation suppression can be defined as an inability to maintain a normal temperature. It is most commonly induced under the influence of heavy dosages of stimulating psychedelic compounds, such as LSD, 2C-B, and AMT.

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.

Analysis enhancement is a perceived improvement of a person's overall ability to logically process information or creatively analyze concepts, ideas, and scenarios. It is most commonly induced under the influence of moderate dosages of stimulant and nootropic compounds, such as amphetamine, methylphenidate, nicotine, and caffeine.

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.

Déjà Vu or Deja Vu can be described as the sudden sensation that a current event or situation has already been experienced at some point in the past when, in actuality, it hasn't. It is most commonly induced under the influence of moderate dosages of hallucinogenic compounds, such as psychedelics, dissociatives, and cannabinoids.

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.

Existential self-realization can be described as a sudden realization, revelation, or reaffirmation of a person's existence within this universe. Existential self-realization is most commonly induced under the influence of moderate dosages of psychedelic and dissociative compounds such as ketamine, LSD, 4-AcO-DMT, and DCK.

Focus enhancement is the experience of an increased ability to selectively concentrate on an aspect of the environment while ignoring other things. It is most commonly induced under the influence of moderate dosages of stimulant and nootropic compounds, such as amphetamine, methylphenidate, modafinil, and caffeine

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

Increased sense of humor is as a general enhancement of the likelihood and degree to which a person finds stimuli to be humorous and amusing. It is most commonly induced under the influence of moderate dosages of certain hallucinogenic compounds, such as psychedelics, mescaline, 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.

Motivation enhancement is an increased desire to perform tasks and accomplish goals in a productive manner. It is most commonly induced under the influence of moderate dosages of stimulant and nootropic compounds, such as amphetamine, methylphenidate, nicotine, and modafinil.

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.

Perception of eternalism can be described as the experience of a major alteration of one's perspective of the fundamental mechanics behind the linear continuity of time moving from the past, to the present, to the future. It is most commonly induced under the influence of heavy dosages of psychedelic compounds, such as LSD, psilocybin, and mescaline.

Perception of interdependent opposites can be described as the experience of a powerful subjective feeling that reality is based upon a binary system in which the existence of fundamentally important concepts or situations logically arise from and depend upon the co-existence of their opposite. It is most commonly induced under the influence of heavy dosages of psychedelic compounds, such as LSD, psilocybin, and mescaline.

Perception of self-design can be described as the experience of feeling that one is personally responsible for the creation, design, manifestation of a concept, process, or event which is normally seen as the result of unrelated external causes. It is most commonly induced under the influence of heavy dosages of psychedelic compounds, such as LSD, psilocybin, and mescaline.

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.

Unity and interconnectedness refers to a feeling in which one's sense of self becomes temporarily expanded to include one or more concepts or systems that would not typically be included within one’s sense of individual identity. It most commonly occurs under the influence of psychedelic and dissociative compounds, such as LSD, DMT, ayahuasca, mescaline, and ketamine.

Wakefulness is an increased ability to stay conscious without feeling sleepy combined with a decreased need to sleep. It is most commonly induced under the influence of moderate dosages of a wide variety of compounds such as stimulants, nootropics, and psychedelics.

Machinescapes are a complex visual and tactile experience where one perceives hallucinatory mechanical landscapes that are vast in both size and intricacy. They are most commonly induced under the influence of heavy dosages of salvia divinorum. However, they can also occur less commonly under the influence of psychedelic compounds, such as LSD, psilocybin, and 2C-P.

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.

Synaesthesia (also spelt synesthesia or synæsthesia) is the experience of a blending, merging, or mixing of the senses. Synaesthesia is commonly induced under the influence of heavy dosages of psychedelic compounds, such as LSD, psilocybin, and mescaline.