{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,9,22]],"date-time":"2026-09-22T14:31:30Z","timestamp":1790087490803,"version":"4.0.1"},"reference-count":100,"publisher":"MDPI AG","issue":"5","license":[{"start":{"date-parts":[[2025,5,6]],"date-time":"2025-05-06T00:00:00Z","timestamp":1746489600000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Neurology International"],"abstract":"<jats:p>Hydrogen sulfide (H2S) is a highly potent toxic gas, and the brain is a primary target organ following acute intoxications. Accidents and misuse of this gas for nefarious purposes, i.e., bioterrorism, are causes for concern regarding acute poisoning. The immediate effects of acute H2S poisoning are well known. Numerous publications have reported neurological sequelae, including insomnia, persistent headaches, ataxia, cognition deficits, hearing impairment, dysarthria, and neuropsychiatric behaviors, among survivors of acute H2S poisoning. However, this subject remains controversial. The goal of this study was to review the literature on acute H2S-poisoning-induced neurological sequelae and on animal models to determine prevalence and knowledge gaps. We also reviewed the literature on cyanide-induced neurological sequelae. The results of large population studies indicate that the majority of victims of acute H2S poisoning survive. There is a lack of patient follow-up and standardized neuropsychological, neurological, and neuroimaging for accurate assessments. We observed flaws in animal models that failed to recapitulate the severe neurotoxicity induced via the inhalation route. We observed a paucity of literature on cyanide-induced neurological sequelae. In contrast to cyanide-induced sequelae, predominantly characterized by Parkinsonian-like motor behavioral deficits, H2S patients exhibit mostly cognition deficits, speech impairment, and neuropsychological effects. This first comprehensive review of neurological sequelae induced by H2S and cyanide poisonings identified knowledge gaps in the prevalence of these sequelae and cellular and molecular mechanisms underlying them. It is unclear whether these sequelae are reversible. There are no FDA-approved drugs for the prevention or treatment of these sequelae. Notably, patients who received life-saving therapy still developed delayed neurological sequelae.<\/jats:p>","DOI":"10.3390\/neurolint17050071","type":"journal-article","created":{"date-parts":[[2025,5,6]],"date-time":"2025-05-06T05:54:43Z","timestamp":1746510883000},"page":"71","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":6,"title":["Neurological Sequelae of Acute Hydrogen Sulfide Poisoning: A Literature Review, Controversies, and Knowledge Gaps"],"prefix":"10.3390","volume":"17","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-2370-1817","authenticated-orcid":false,"given":"Wilson K.","family":"Rumbeiha","sequence":"first","affiliation":[{"name":"Department of Molecular Biosciences, School of Veterinary Medicine, University of California, Davis, CA 95616, USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Dong-Suk","family":"Kim","sequence":"additional","affiliation":[{"name":"Department of Molecular Biosciences, School of Veterinary Medicine, University of California, Davis, CA 95616, USA"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"1968","published-online":{"date-parts":[[2025,5,6]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"5","DOI":"10.1111\/nyas.13148","article-title":"Acute hydrogen sulfide-induced neuropathology and neurological sequelae: Challenges for translational neuroprotective research","volume":"1378","author":"Rumbeiha","year":"2016","journal-title":"Ann. 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