368 
Glycerites  of  Ferrous  Salts. 
Am.  Jour.  Pharm. 
July,  1889. 
GLY CEBIT  UM  FEEEI  IODIDI. 
Take  of  iron   1  oz. 
"     iodine   2  ozs. 
"    distilled  water  .   3  fl.  ozs. 
"     glycerin   27  fl.  ozs.,  or  a  sufficiency. 
Mix  two  ounces  of  the  water  with  an  equal  volume  of  glycerin  in  a 
flask,  and  in  this  mixture  digest  the  iodine  and  iron,  heating  slightly, 
and  occasionally  shaking  until  the  froth  becomes  white,  then  filter  the 
liquid  into  16  fluidounces  of  the  glycerin,  rinse  the  flask  and  iron 
wire,  and  wash  the  filter  with  the  remaining  ounce  of  water.  There 
is  no  provision  in  the  B.  P.  for  washing  the  filter,  hence  there  is  loss 
of  iodide.  Mix  and  make  up  the  measure  of  the  product  when  cold 
to  31  fluidounces.  Its  specific  gravity  should  be  about  1*300.  It 
contains  4  3  grains  ferrous  iodide  in  1  fluid  drachm. 
The  specific  gravity  of  glycerin  varies  slightly,  and  where  the 
strength  and  dose  are  calculated  on  the  fluid  measure  it  ensures  greater 
accuracy  to  make  up  the  product  to  a  definite  quantity  as  above,  than 
to  a  definite  weight,  as  in  the  case  of  the  official  syrup,  ferri  iodidi. 
Another  syrup  for  which  there  has  been  some  demand,  and  which 
has  also  been  a  source  of  annoyance  to  many  pharmacists,  is  the  syrup 
of  bromide  of  iron.  I  have  had  entirely  satisfactory  results  with  a 
glycerite  of  this  containing  5  grains  of  ferrous  bromide  in  the  fluid 
drachm.    It  is  made  by  the  following  formula : 
GLYCEBITUM  FERRI  BROMIDE 
Take  of  iron   385  grains. 
"     bromine   770  " 
"     distilled  water     3  fl.  ozs. 
"     glycerin   26  fl.  ozs. 
Proceed  in  the  same  way  as  for  glyceritum  ferri  iodidi.  This  glycer- 
ite contains  about  5  grains  in  the  fluid  drachm,  and  has  a  specific 
gravity  of  about  1*300. 
The  same  idea  can,  of  course,  by  suitable  manipulation  be  applied 
to  liquid  preparations  of  other  ferrous  salts,  such  as  hypophosphite, 
phosphate,  protochloride  and  sulphate,  and  to  mixtures  containing  any 
of  these. 
On  the  same  lines,  a  couple  of  years  or  so  ago,  I  prepared  a  sub- 
stitute for  Blaud's  pills  by  making  a  glycerite  of  ferrous  sulphate  and 
a  syrup  of  carbonate  of  potash,  5  grains  of  each  in  the  drachm,  but 
such  a  preparation  has  the  disadvantage  of  being  more  difficult  to 
manage  than  pills. 
