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 citrate of ammonium and bismuth 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 citrate of ammonium and bismuth with pepsin. If of acid reaction, cautiously add ammonia water until it is neutral or even slightly alkaline.
Each fluidrachm (teaspoonful) of the finished elixir contains one grain each of pepsin and ammonio-citrate of bismuth, and one-hundredth grain of strychnine.
The remarks we have made concerning strychnine and pepsin, in their respective positions, will apply with pertinence to this preparation; and although this elixir embraces a mass of pharmaceutical incongruities, it is among the most popular elixirs used by physicians. Were it not for this fact, the combination would not deserve a position.