This section is from the "Elixirs And Flavoring Extracts. Their History, Formulae, & Methods of Preparation" book, by John Uri Lloyd. Also available from Amazon: Elixirs and flavoring extracts,: Their history, formulae, and methods of preparation;
Elixir of pyrophosphate of iron,. 8 fluidounces.
Elixir of citrate of ammonium and bismuth with pepsin, 8 fluidounces.
Mix them together.
Each fluidrachm (teaspoonful) of the finished elixir contains one grain of pyrophosphate of iron and only one half grain each of pepsin and of ammonio-citrate of bismuth. The solution has an alkaline reaction, and the pepsin, under these conditions, is of uncertain quality.