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We had previously observed increases of lactate formation in the mouse brain during anesthesia with volatile anesthetic agents. In the present work, we used mitochondria that were freshly isolated from mouse brain to test mitochondrial respiration and ATP synthesis in the presence of six common anesthetic drugs. The volatile anesthetics isoflurane, halothane, and (to a lesser extent) sevoflurane caused an inhibition of complex I of the electron transport chain in a dose-dependent manner. Significant effects were seen at concentrations that are reached under clinical conditions (&lt;\u20090.5\u00a0mM). Pentobarbital and propofol also inhibited complex I but at concentrations that were two-fold higher than clinical EC\n                    <jats:sub>50<\/jats:sub>\n                    values. Only propofol caused an inhibition of complex II. Complex IV respiration was not affected by either agent. Ketamine did not affect mitochondrial respiration. Similarly, all anesthetic agents except ketamine suppressed ATP production at high concentrations. Only halothane increased cytochrome c release indicating damage of the mitochondrial membrane. In summary, volatile general anesthetic agents as well as pentobarbital and propofol dose-dependently inhibit mitochondrial respiration. This action may contribute to depressive actions of the drugs in the brain.\n                  <\/jats:p>","DOI":"10.1007\/s00210-022-02338-9","type":"journal-article","created":{"date-parts":[[2022,11,16]],"date-time":"2022-11-16T20:04:53Z","timestamp":1668629093000},"page":"375-381","update-policy":"https:\/\/doi.org\/10.1007\/springer_crossmark_policy","source":"Crossref","is-referenced-by-count":41,"title":["Inhibition of mitochondrial respiration by general anesthetic drugs"],"prefix":"10.1007","volume":"396","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-9248-4502","authenticated-orcid":false,"given":"Anton","family":"Fedorov","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Alina","family":"Lehto","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-6971-3381","authenticated-orcid":false,"given":"Jochen","family":"Klein","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"297","published-online":{"date-parts":[[2022,11,17]]},"reference":[{"key":"2338_CR1","doi-asserted-by":"publisher","first-page":"572","DOI":"10.1111\/j.1399-6576.2006.00988.x","volume":"50","author":"R Bains","year":"2006","unstructured":"Bains R, Moe MC, Larsen GA, Berg-Johnsen J, Vinje ML (2006) Volatile anaesthetics depolarize neural mitochondria by inhibiton of the electron transport chain. 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