Angioedema due to diphetarsone and a review of its toxicity.

Diphetarsone is an arsenical used in the treatment of intestinal amoebiasis and trichuriasis. It is an efficacious drug with minimal toxicity. However, in this report, a heretofore undescribed reaction, that of generalized angioedema, is presented. A review of diphetarsone toxicity is also presented.