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 with pepsin, 16 fluidounces.
Strychnine, 1 1/4 grains.
Acetic acid, a sufficient quantity.
Triturate the strychnine in a mortar with acetic acid in sufficient amount to effect its solution, and then add the elixir of pyrophosphate of iron with pepsin.
Each fluidrachm (teaspoonful) of the finished elixir contains one grain each of pyrophosphate of iron and of pepsin, and about one-hundredth of a grain of strychnine as the acetate of that alkaloid.