Pupil dilation

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An image example of a dilated pupil

Pupil dilation (also called mydriasis) can be described as the enlargement of the size of a person's pupils under normal lighting conditions. Normally, the pupil size increases in the dark and shrinks in the light, however, a dilated pupil will remain excessively large even in a bright environment.

Pupil dilation 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[1] and some antidepressants.

Psychoactive substances

Compounds within our psychoactive substance index which may cause this effect include:

... further results

Experience reports

Anecdotal reports which describe this effect within our experience index include:

See also

External links


  1. Zuba, D. (2012). Identification of cathinones and other active components of ‘legal highs’ by mass spectrometric methods. TrAC Trends in Analytical Chemistry, 32, 15-30. https://doi.org/10.1016/j.trac.2011.09.009