Volume 14, Issue 1
  • ISSN: 0002-9637
  • E-ISSN: 1476-1645



Natural emetine, synthetic 2-dehydroemetine or the corresponding C-labeled compounds were injected intraperitoneally into guinea pigs in the form of the dihydrochloride. The unlabeled drugs were determined spectrofluorometrically, and the C-labeled compounds by combustion and liquid scintillation counting. These determinations show that:

Dehydroemetine is eliminated more rapidly from each individual organ than is emetine.

Dehydroemetine disappears relatively more quickly from the heart than from the liver, whereas the reverse is true of emetine. This may in some way be related to the equal therapeutic activity and lower cardiotoxicity of dehydroemetine compared with emetine.

After an intraperitoneal injection of C-labeled emetine or dehydroemetine, 95% of the injected radioactivity was recovered in the feces while only 5% appeared in the urine.


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