“…is reported [4,5] to have recommended the use of a paste of realgar, As,, $4, for the treatment of ulcers. In this century the most extensive use of arsenic compounds has been in the treatment of syphilis and trypanosomal diseases [3,6,7], although a variety of other conditions have been treated with As compounds including asthma, diabetes, and skin diseases [4] and until the 1950s [8], arsenic containing preparations were used as so-called tonics, e.g. Fowler's solution [9], reportedly first used by Fowler in 1786 [10-1.…”