Deja vu

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. ^{[1] [2] [3] [4]} This term is a common phrase from the French language which translates literally into “already seen” and is directly related to the lesser known state referred to as "jamais-vu". It is a well-documented phenomenon that can commonly occur throughout both sober living and under the influence of hallucinogens.

Within the context of psychoactive substance usage, many compounds are commonly capable of inducing spontaneous and often prolonged states of mild to intense sensations of déjà vu. This can provide one with an overwhelming sense that they have “been here before”. The sensation is also often accompanied by a feeling of familiarity with the current location or setting, the current physical actions being performed, the situation as a whole, or the effects of the substance itself.

This effect is often triggered despite the fact that during the experience of it, the person can be rationally aware that the circumstances of the “previous” experience (when, where, and how the earlier experience occurred) are uncertain or believed to be impossible.

Déjà vu is often accompanied by other coinciding effects such as short-term memory suppression and thought loops. It is most commonly induced under the influence of moderate dosages of hallucinogenic compounds, such as psychedelics, dissociatives, and cannabinoids.