TINCTURES 29 



TYPE PROCESSES FOR TINCTURES 



Type Process P — Percolation. Moisten the powdered drug 

 or mixed drugs as designated in the formula with a sufficient quantity 

 of the prescribed menstruum to render it evenly and distinctly damp, 

 transfer it to a percolator, and, without pressing the powder, allow it 

 to stand well covered for six hours, then pack it firmly, unless other- 

 Wise directed, and pour on enough of the menstruum to saturate the 

 powder and leave a stratum above it. When the liquid begins to drop 

 from the percolator, close the lower orifice, and, having closely covered 

 the percolator, macerate for twenty-four hours. Then allow the per- 

 colation to proceed slowly, gradually adding sufficient of the men- 

 struum to make one thousand mils of the finished tincture. 



Type Process M — Maceration. Macerate the drug or mixed 

 drugs designated in the formula in a stoppered container, in a mod- 

 erately warm place, with seven hundred and fifty mils of the pre- 

 scribed solvent (unless a difl^erent amount is specified in the formula). 

 Continue the maceration with frequent agitation during three days or 

 until the drug is practically extracted, transfer the mixture to a filter 

 and, when the liquid has drained off completely, gradually wash the 

 residue on the filter with enough of the solvent to make one thousand 

 mils of finished tincture. 



There are 54 official tinctures. The following table gives a list of 

 official tinctures together with method of preparation and men- 

 struum employed : 



By Solution or Dilution 



PEEPAEATIOW SOLVENT 



Tinctura Ferri Chloridi Alcohol 650 mils 



Sol. of Ferric Chloride 350 mils 

 Tinctura lodi Alcohol 950, Water 50 



Maceration Type M 



MENSTEITUM PEEPARATION 



Alcohol, U. S. p. Tinctura AsafoetidsB 



Tinctura Aurantii Dulcis 



Tinctura Benzoini 



Tinctura Benzoini Composita 



Tinctura Guaiaci 



Tinctura Myrrhas 



Tinctura Limonis Corticis 



Tinctura Tolutana 



Tinctura Lavandulae Composita 



Alcohol 750 mils, Water 250 mils Tinctura Scilfe 



