Caffeine, 128 grains.

Dilute hydrobromic acid, U. S. P. 32 grains.

Syrup of coffee, 4 fluidounces.

Simple elixir, enough to make, 16 fluidounces.

Triturate the caffeine in a mortar with the dilute hydrobromic acid and sufficient simple elixir to dissolve it, then add the syrup, and lastly enough simple elixir to make sixteen fluidounces. This formula is similar to the one commended by the National Formulary, and is of the same strength.