melaena
noun [ U ] medical UK specialized (US melena) uk/məˈliː.nə/ us/məˈliː.nə/
黑粪症
dark, solid body waste that contains blood as a result of bleeding in the upper part of the intestines
Overdosage may cause nausea, dizziness, hyperventilation, vomiting, and melaena. 过量使用可导致恶心、晕眩、换气过度、呕吐和黑粪症。