Emulsa (Emulsions)

Liquid preparations consisting of oily or resinous substances held suspended in water which has been rendered mucilaginous or viscid. Mucilago Acaciae and Tragacanthae are frequently used to form emulsions. Mucilago Acaciae should be recently prepared. It is incompatible with ferric chloride, borax, and lead subacetate.

Emulsions are coagulated by acids, an undue proportion of metallic salts, and spirituous liquids. There are in U. S. P.:

Dose.

Emulsum Chloroformi.......................

1 - 4 fl Emulsa Emulsions 23 ; 4. - 15. c.c.

- Ammoniaci........................

1/2 - 1 fl Emulsa Emulsions 24 ; 15. - 30. c.c.

- Asafoetidae.....................

- Amygdalae...............................

indeterminate.

Extracta (Extracts)

Solid or soft-solid preparations not agreeing in strength, made by evaporating solutions of the active constituents of organic drugs to the required consistency.

The drug is first powdered, then macerated and percolated with the appropriate menstruum to exhaustion. The first third of the percolate is reserved, the remainder is evaporated at a temperature not exceeding 1220 F.; 50° C.; until its weight is ten per cent. of that of the drug used, then mixed with the reserved portion, and both are evaporated at or below the above-named temperature until an extract of a pilular consistence remains. For converting extracts into powdered extracts it is sometimes necessary to add an inert dry substance. The menstrua used are:

(a) Alcohol; Extractum Aconiti, Cannabis Indicae, Cimicifugae, Colo-cynthidis Compositum, Iridis, Jalapae, and Physostigmatis.

(b) Alcohol and water; Extractum Belladonnae Foliarum Alcoholicum, Digitalis, Euonymi, Leptandrae, Podophylli, Rhei, and Uvae Ursi.

(c) Alcohol, water and diluted alcohol; Extractum Cinchonae, Hyoscyami.

(d) Diluted alcohol; Extractum Arnicae Radicis, Cinchonae, Colocynthi-dis, Juglandis, and Stramonii Seminis.

e) Water; Extractum Aloes, Gentianae, Glycyrrhizae, Haematoxyli, Kra-meriae, Opii, and Quassiae.

(/) Water and Aqua Ammoniae; Extractum Glycyrrhizae Purum.

(g) Acetic Acid and water; Extractum Colchici Radicis.

(h) Acetic Acid and diluted alcohol; Extractum Conii.

(i) Acetic Acid, alcohol, and water; Extractum Nucis Vomicae.

Extractum Taraxaci is an inspissated juice.

Extractum Ergotae is obtained by evaporating the fluid extract.

They are in the U. S. P.

Dose.

Extractum Aconiti............................

1/10 - 1/4 gr.; .006 - .015 gm.

- Physotigmatis..........................

1/10 -1/2 gr.; .006 - .03 gm.

- Belladonnae Foliarum Alcoholicum

1/8 - 1/2 gr.; .008 - .03 gm.

- Nucis Vomicae...............

1/8 - 1 gr.; .008 - .06 gm.

- Opii.............................

- Cannabis Indicae..........................

1/6 - 3/4 gr.; .01 - .045 gm.

- Stramonii Seminis............................

1/4 - 1/2 gr.; .015 - .03 gm.

- Digitalis...............................

1/4 -1 gr.; .015 - .06 gm.

- Conii............................

1/3 - 1 gr.; .02 - .06 gm.

- Colocynthidis...............................

1/2 - 2 gr.; .03 - .12 gm.

- Colchici Radicis............................

- Hyoscyami....................................

- Quassiae....................

1/2 - 3 gr.; .03 - .20 gm.

- Aloes............................

- Leptandrae..........................

1 - 3 gr.; .06 - .20 gm.

- Iridis...............................

- Euonymi......................

1 - 5 gr.; .06 - .30 gm.

- Cimicifugae...........................

- Jalapae......................

2 - 8 gr.; .12 - .50 gm.

- Gentianae.......................

2 - 10 gr.; .12 - .60 gm.

- Podophylli.......................

- Rhei.........

3 - 15 gr.; .20 - 1.00 gm.

- Arnicae Radicis..........................

5 - 10 gr.; .30 - .60 gm.

- Krameriae..................................

- Colocynthidis Compositum

5 - 15 gr.; .30 - 1.00 gm.

- Haematoxyli.............................

- Erogotae.........................

- Uvae Ursi........

Extractum Cinchonae............................

Dose. 5 - 30 gr.; 5 - 30 - 2.00 gm.

- Taraxaci........................

- Juglandis.............................

- Glycyrrhizae..........................

Freely.

- - Purum......................................