Cutaneous vascular sensitivity to lower aliphatic alcohols and aldehydes in Orientals

An ethnic predisposition to ethanol-provoked flushing among diverse Mongoloid populations may be the consequence of a delayed oxidation and accumulation of acetaldehyde. Orientals who flush after oral alcohol are more likely to have cutaneous erythema after topical ethanol or propanol, and the cutaneous vascular reaction to primary alcohols is actually provoked by the corresponding aldehyde. The cutaneous reaction to primary alcohols can be totally blocked by pretreatment with 4-methylpyrazole, a potent inhibitor of alcohol dehydrogenase.