Language suppression

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Language suppression (also known as a aphasia) can be described as a decreased ability to use and understand speech.[1][2] This creates the feeling of finding it difficult or even impossible to vocalize one's own thoughts and to process the speech of others. However, the ability to speak and to process the speech of others does necessarily become suppressed simultaneously. For example, a person may find themselves unable to formulate a coherent sentence while still being able to perfectly understand the speech of others.

Language suppression is often accompanied by other coinciding effects such as analysis suppression and thought deceleration. It is most commonly induced under the influence of heavy dosages of antipsychotic compounds, such as quetiapine,[3] haloperidol,[4] and risperidone.[5] However, it can also occur in a less consistent form under the influence of extremely heavy dosages of hallucinogenic compounds such as psychedelics, dissociatives, and deliriants. This is far more likely to occur when the person is inexperienced with that particular hallucinogen.

Psychoactive substances

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

Experience reports

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

See also

External links


  1. What is Aphasia? (Psychology Dictionary) |
  2. Transient Aphasia: Causes of Temporary Aphasia |
  3. Chien, C. F., Huang, P., & Hsieh, S. W. (2017). reversible global aphasia as a side effect of quetiapine: a case report and literature review. Neuropsychiatric disease and treatment, 13, 2257.
  4. Iqbal, M. M., Aneja, A., Rahman, A., Megna, J., Freemont, W., Shiplo, M., ... & Lee, K. (2005). The potential risks of commonly prescribed antipsychotics: during pregnancy and lactation. Psychiatry (Edgmont), 2(8), 36.
  5. Sinha, P., Vandana, V. P., Lewis, N. V., Jayaram, M., & Enderby, P. (2015). Evaluating the effect of risperidone on speech: A cross-sectional study. Asian journal of psychiatry, 15, 51-55.