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.

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 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.

An abnormal heartbeat is any of a group of conditions in which the electrical activity of the heart is irregular. During this state, the heartbeat may be too fast (over 100 beats per minute) or too slow (less than 60 beats per minute) and may be regular or irregular. An abnormal heartbeat is most commonly induced under the influence of moderate dosages of stimulant and depressant compounds, such as cocaine, methamphetamine, 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 pressures can be described as the physical experience of spontaneous pressures across different parts of the body. They are most commonly induced under the influence of heavy dosages of stimulating psychedelics, such as 2C-E, DPT, and 5-MeO-DMT.

Dehydration can be described as an uncomfortably dry mouth and feelings of general thirstiness that results due to a lack of water intake. It is most commonly induced under the influence of moderate dosages of a wide variety of compounds such as, stimulants, psychedelics, opioids, dissociatives, deliriants, cannabinoids, alcohol, and antipsychotics.

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.

Dizziness can be described as the perception of a spinning or swaying motion which typically causes a difficulty in standing or walking. It is most commonly induced under the influence of heavy dosages of GABAergic depressant compounds, such as benzodiazepines, alcohol, and GHB.

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.

Frequent urination, or urinary frequency, can be defined as the need to urinate more often than usual. It is most commonly induced under the influence of moderate dosages of a wide variety of compounds, such as stimulants, psychedelics, dissociatives, and deliriants.

A headache can be described as a pain anywhere in the region of the head or neck. It can be a symptom of a number of different conditions. They are most commonly induced under the influence of heavy dosages of stimulating compounds, such as traditional stimulants, certain psychedelics, and certain dissociatives.

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.

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.

Restless legs (also known as restless legs syndrome or RLS) is a neurological disorder characterized by an irresistible urge to move one's body to stop uncomfortable or odd sensations. Restless legs syndrome is most commonly induced during the withdrawal symptoms of many depressants, such as opioids or benzodiazepines, and during the offset of many stimulants, such as methamphetamine, cocaine, and MDMA. However, it can also occur under the influence of deliriants such as DPH and datura.

A runny nose can be described as a condition where the nasal cavity is filled with a significant amount of mucous fluid, otherwise known as "snot". It is most commonly induced under the influence of heavy dosages of tryptamine psychedelic compounds, such as psilocybin, 4-AcO-DMT, and 4-HO-MET. However, it can also occur under the influence of opioid withdrawals) and as a symptom of cocaine abuse.

Sedation can be described as a decrease in a person's physical energy levels which are interpreted as discouraging when it comes to wakefulness, movement, performing tasks, talkativeness, and general exercise. It is most commonly induced under the influence of moderate dosages of depressant compounds, such as opioids, GABAergics, and antipsychotics.

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.

Stomach bloating can be described as an uncomfortable physical side effect which results in one's stomach becoming temporarily bloated and expanded in a manner which looks somewhat similar to pregnancy. It is most commonly induced under the influence of heavy dosages of psychedelic compounds, such as LSD, psilocybin, and mescaline. However, it can also occur under the influence of stimulants, opioids, and depressants.

A stomach cramp can be described as an intense feeling of sudden pain or discomfort which occurs within the stomach. They are most commonly induced under the influence of heavy dosages of a wide variety of compounds, such as psychedelics, opioids, GABAergics, and deliriants.

Teeth grinding (also known as bruxism, jaw clenching, and gurning) can be described as a compulsive and often uncontrollable urge to grind one's teeth. It is most commonly induced under the influence of common dosages of stimulant compounds, such as methamphetamine, MDMA, methylphenidate, and cocaine. However, it can also occur under the influence of certain stimulating psychedelics such as 2C-E, DOC, and AMT.

Watery eyes can be described as a physical effect which results in a state of continuous involuntary streaming, tearing, crying, and watering of the tear ducts within one's eyes. It is most commonly induced under the influence of moderate dosages of psychedelic tryptamine compounds, such as psilocybin, 4-AcO-DMT, and 4-HO-MET.

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.

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.

Autonomous voice communication is the experience of being able to hear and converse with a disembodied and audible voice of unknown origin which seemingly resides within one's own head. It is most commonly induced under the influence of heavy dosages of hallucinogenic compounds such as psychedelics, dissociatives, and deliriants.

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.

Enhancement and suppression cycles is an effect which results in two opposite states of mind that do not occur simultaneously but instead swap between each other at seemingly random intervals. The first of these two alternate states can be described as the experience of cognitive enhancements which feel is if they drastically improve the person's ability to think clearly. The second of these two alternate states can be described as the experience of a range of cognitive suppressions which feel as if they drastically inhibit the person's ability to think clearly. They are most commonly induced under the influence of heavy dosages of psychedelic tryptamines, such as psilocybin, ayahuasca, and 4-AcO-DMT.

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.

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 predeterminism can be described as the sensation that all physical and mental processes are the result of prior causes, that every event and choice is an inevitable outcome that could not have happened differently, and that all of reality is a complex causal chain that can be traced back to the beginning of time. It is most commonly induced under the influence of heavy 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 connectivity is an alteration of a person's thought stream which is characterized by a distinct increase in wandering thoughts which connect into each other through a fluid association of ideas. It is most commonly induced under the influence of moderate dosages of psychedelic compounds, such as LSD, psilocybin, and mescaline.

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.

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.