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The effects listed below are based upon the subjective effects index and personal experiences of PsychonautWiki contributors. The listed effects will rarely (if ever) occur all at once, but heavier dosages will increase the chances and are more likely to induce a full range of effects.
The subjective physical effects of Ketamine can be broken down into several components which progressively intensify proportional to dosage. These are described below and generally include:
- Spontaneous tactile sensations - The Ketamine body high is a sharp, pleasurable tingling sensation which is location specific to the hands, feet and head.
- Tactile suppression - This partially to entirely suppresses one's own sense of touch, creating feelings of numbness within the extremities. It is responsible for the anaesthetic properties of this substance.
- Motor control loss - A loss of gross and fine motor control alongside of balance and coordination is prevalent within Ketamine and becomes especially strong at higher dosages. This means that one should be sitting down before the onset (unless experienced) in case of falling over and injuring oneself.
- Euphoria - This results in feelings of physical euphoria which range between mild pleasure to powerfully all-encompassing bliss.
- Perception of decreased weight - This creates the sensation that the body is floating and has become entirely weightless. This effect is strangely stimulating and encourages physical activities at low to moderate dosages by making the body feel light and effortless to move.
- Dizziness - Although uncommon, some people report dizziness under the influence of Ketamine.
- Nausea - It's worth noting that high dose ketamine trips can sometimes result in nausea and vomiting at the peak of trip. For most people, this is surprisingly not as unpleasant as they would initially expect due to the accompanying detachment from the physical senses.
- Tactile disconnection
- Physical autonomy
The cognitive effects of ketamine are often described as particularly forceful towards introspection and with more analytical thought process when compared to that of other dissociatives such as DXM or MXE.
These effects can be broken down into 13 separate subcomponents which are listed and described below:
- Consciousness disconnection
- Memory suppression
- Immersion enhancement
- Thought deceleration
- Information processing suppression
- Time distortion
- Déjà vu
- Personal bias suppression
- Conceptual thinking
- Subconscious communication
- Unity and interconnectedness
- Compulsive redosing
- Anxiety suppression
This substance does not enhance visual stimuli; instead, it tends to degrade and decrease visual aptitude in a variety of ways which generally include:
- Visual disconnection - This eventually results in the experience of the famous "K-hole" or, more specifically, holes, spaces and voids alongside of structures.
- Double vision - This component is prevalent at moderate to heavy dosages and makes reading impossible unless one closes an eye.
- Pattern recognition suppression - This effect generally occurs at higher dosages and makes one unable to recognize and interpret perceivable visual data.
- Visual acuity suppression
Ketamine exhibits a full array of dissociative distortions and alterations in visual perception which generally includes:
The visual geometry found within ketamine can be described as very brightly coloured in scheme when compared to that of MXE but not as complex or psychedelic as that of DXM. It does not extend beyond level 4 and can be comprehensively described through its variations as simplistic in complexity, algorithmic in style, synthetic in feel, unstructured in organization, dimly lit in lighting, multicoloured in scheme, glossy in shading, soft in edges, large in size, fast in speed, smooth in motion, equal in rounded and angular corners, immersive in depth and consistent in intensity.
At high dosages, Ketamine can produce a full range of high level hallucinatory states in a fashion that is less consistent and reproducible than that of many other commonly used psychedelic. These effects include:
- External hallucinations (autonomous entities; settings, sceneries, and landscapes; alterations in perspective and scenarios and plots) - In comparison to other dissociatives, this effect can occur at heavy dosages but is extremely infrequent in comparison to the same effect found within deliriants. It can be comprehensively described through its variations as delirious in believability, autonomous in controllability and solid in style. The most common theme for this effect to follow is one of experiencing and talking to friends around oneself when they are not actually present.
- Internal hallucinations (autonomous entities; settings, sceneries, and landscapes; alterations in perspective and scenarios and plots) - In comparison to other dissociatives, this effect can occur at heavy dosages, but is considerably less common than the same effect found within psychedelics and deliriants. It can be comprehensively described through its variations as delirious in believability, fixed in style, equal in new experiences and memory replays in content, autonomous in controllability and solid in style.
The auditory effects of ketamine are common in their occurrence and exhibit a range of effects which commonly includes: