Adrenochrome

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Adrenochrome is a chemical compound produced by the oxidation of adrenaline (epinephrine). It was the subject of limited research from the 1950s through to the 1970s as a potential cause of schizophrenia. While adrenochrome has no currently proven medical application, the semicarbazide derivative, carbazochrome, is a hemostatic medication. Adrenochrome is mass produced and commercially available to the public, and is not a controlled substance.<ref>Tamou Thahouly et al., Bovine Chromaffin Cells: Culture and Fluorescence Assay for Secretion, Methods Mol Biol 2021;2233:169-179. doi: 10.1007/978-1-0716-1044-2_11.</ref><ref>"Adrenochrome Supplies for Sale." Aobious: a New Experience, Aibous. Aobious Products Catalog, aobious.com/aobious/products/13456-adrenochrome.html. Accessed 30 June 2025. Archived at Internet Archive.</ref>

Despite this compound's name, it is unrelated to the element chromium; instead, the "chrome" suffix indicates a relationship to color, as pure adrenochrome has a deep violet color.<ref name=Aminochrome/>

Chemistry

The oxidation reaction that converts adrenaline into adrenochrome occurs both in vivo and in vitro. Silver oxide (Ag2O) was among the first reagents employed for this,<ref>Template:Cite journal</ref> but a variety of other oxidizing agents have been used successfully.<ref>Template:Cite journal</ref> In solution, adrenochrome is pink and further oxidation of the compound causes it to polymerize into brown or black melanin compounds.<ref name="HofferOsmond1967" />

Synthesis

Adrenochrome is readily synthesized from commercially available reagents: chloroacetic acid and catechol react in the presence of phosphoryl chloride to yield chloroacetylcatechol. After purification, chloroacetylcatechol is reacted with aqueous methylamine and treated with hydrochloric acid, yielding adrenalone hydrochloride. This is then hydrogenated to racemic adrenaline. Finally, adrenaline is oxidized to adrenochrome by an appropriate oxidizing agent such as silver oxide.<ref name="schayer">Template:Cite journal</ref>

History

An adrenochrome ampoule

Several small-scale studies involving 15 or fewer test subjects conducted in the 1950s and 1960s reported that adrenochrome triggered psychotic reactions such as thought disorder and derealization.<ref name=Smythies>Template:Cite journal</ref>

In 1954, researchers Abram Hoffer and Humphry Osmond claimed that adrenochrome is a neurotoxic, psychotomimetic substance and may play a role in schizophrenia and other mental illnesses.<ref name="pmid13152519">Template:Cite journal</ref> In what Hoffer called the "adrenochrome hypothesis",<ref name="Hoffer2">Template:Cite journal</ref> he and Osmond in 1967 speculated that megadoses of vitamin C and niacin could cure schizophrenia by reducing brain adrenochrome.<ref name="HofferOsmond1967">Template:Cite book</ref><ref name=hoffer94>Template:Cite journal</ref>

The treatment of schizophrenia with such potent anti-oxidants is controversial. In 1973, the American Psychiatric Association reported methodological flaws in Hoffer's work on niacin as a schizophrenia treatment and referred to follow-up studies that did not confirm any benefits of the treatment.<ref name="APA">Template:Cite web</ref> Multiple additional studies in the United States,<ref name="ArchGenPsy">Template:Cite journal</ref> Canada,<ref name="SZ Bull">Template:Cite journal</ref> and Australia<ref name="ANZJP">Template:Cite journal</ref> similarly failed to find benefits of megavitamin therapy to treat schizophrenia.

The adrenochrome theory of schizophrenia waned, despite some evidence that it may be psychotomimetic, as adrenochrome was not detectable in people with schizophrenia.Template:Citation needed

In the early 2000s, interest was renewed by the discovery that adrenochrome may be produced normally as an intermediate in the formation of neuromelanin.<ref name=Smythies /> This finding may be significant because adrenochrome is detoxified at least partially by glutathione-S-transferase. Some studies have found genetic defects in the gene for this enzyme.<ref>Template:Cite book</ref>

Adrenochrome is also believed to have cardiotoxic properties.<ref>Template:Cite journal</ref><ref>Template:Cite journal</ref>

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See also

References

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