Powders are triturated mixtures of dry medicinal substances. Except for Seidlitz Powder, the official powders are all insoluble.
Prepare the official Pulvis Cretae Compositus as follows: Thoroughly mix by trituration 2 Gm. finely powdered acacia, 5 Gm. powdered sugar, and 3 Gm. prepared chalk. When intimately mixed, pass through a No. 60 sieve. (Reserve for next group.)
Examine the following official Powders:
P. Cretae Compositus
P. Effervescens Comp. (Seidlitz Powder)
Aperient; dose, 1 set of 2 powders
P. Glycyrrhizae Comp.
Laxative; 4 Gm.
P. Ipecac, et Opii (Dover's Powder)
Abortant for "colds"; 0.5 Gm.
P. Jalapae Comp.
Vigorous purge; 2 Gm.
P. Rhei Compositus (Gregory's Powder)
Sharp cathartic; av. dose, 2 Gm.
Make trial Seidlitz Powders as follows: Mix 15 Gm. dry, finely powdered sodium bicarbonate intimately with 45 Gm. dry, finely powdered potassium and sodium tartrate. Divide the mixture into 6 equal parts, and wrap each part in a separate blue paper.
Divide 13 Gm. dried, finely powdered tartaric acid into 6 equal parts, and wrap each part in a separate white paper.
Keep these powders in a dry, well-protected container. Take one or two doses, mixed in water, before breakfast, and note effect.