title: Commentary on ethanol tolerance.
mesh_terms: D000437:Alcoholism / Q000235:genetics / Q000523:psychology; D000818:Animals; D002490:Central Nervous System / Q000187:drug effects; D003214:Conditioning, Classical; D004361:Drug Tolerance; D004777:Environment; D000431:Ethanol / Q000378:metabolism / Q000494:pharmacology*; D006801:Humans; D009020:Morphine / Q000494:pharmacology; D019966:Substance-Related Disorders / Q000523:psychology
chemical_list: D000431:Ethanol; D009020:Morphine