Dusting powder

These are employed either as antiseptics or as astringents or for both purposes. Their use is limited, and they are employed only where the secretion is scanty.

Among the various powders used are: aristol, dermatol, boric acid, orthoform, calomel, protonuclein, zinc oxide, alum, scarlet red, etc.

Thymoliodide, or aristol, is a splendid antiseptic powder and enjoys the advantage over iodoform of being inodorous.

Iodoform  should only be used in tubercular conditions.

Dermatol, or bismuth subgallate, combines the astringent and mildly antiseptic qualities of bismuth and gallic acid.

Boric acid  is mildly antiseptic.

Calomel  should only be used in syphilitic conditions.

Zinc oxide  and alum  are both astringent.

Scarlet red (5 per cent.) with boric acid (95 per cent.) is indicated for the stimulation of granulations.

Solutions. Among the various solutions used are silver nitrate, in various strengths, zinc and copper sulphate, ichthyol, balsam of Peru, nitric acid, sulphuric acid, trichlorand monochloracetic acid.

Silver nitrate  is employed for its astringent action, as are also the copper  and zinc sulphates.

Balsam of Peru is used for its stimulating action.

The stronger acids are employed for their escharotic qualities.

“Red wash” (made up from the following formula: zinc sulphate 20 grains, compound tincture of lavender 30 minims, distilled water to make 8 ozs.) has a powerful astringent action and promotes cicatrization, especially when there is a tendency for the granulations to become exuberant.

In the treatment of chilblains, a strong astringent is desirable to constrict the diluted capillaries.

The stronger lotio alba  of the national formulary, containing equal parts of the saturated solutions of zinc sulphate and potassium sulphuret, is markedly astringent and has a drying effect upon the skin.