2l6 
Petrox  Preparations. 
Am.  Jour.  Phann. 
May,  1911. 
amount  of  Oil  of  Lavender  largely  overcomes  this  objection  and 
makes  a  decided  improvement  in  the  preparations  and  is  an  innova- 
tion that  we  should  introduce. 
The  compound  preparations  of  this  class  are  always  listed  as 
containing  a  definite  percentage  of  the  active  medicament  and  for 
this  reason  as  well  as  for  the  practicability  of  the  work  and  to 
avoid  the  soiling  of  measures,  the  formulas  submitted  are  all  con- 
structed on  a  percentage  basis  and  the  ingredients  are  all  weighed. 
This  departure  from  our  established  rule  of  weighing  solids  and 
measuring  liquids  is  for  reasons  quite  apparent,  preferable  in  this 
class. 
The  N.  F.  directs  the  use  of  Spirit  of  Ammonia  and  the  Br. 
Ph.  Codex  Ammoniated  Alcohol  5  per  cent,  in  some  formulas  and 
10  per  cent,  in  others.  Spirit  of  Ammonia  is  so  rarely  called  for, 
that  it  is  kept  in  stock  by  comparatively  few  druggists  and  even 
when  in  stock  it  is  usually  deteriorated  and  of  uncertain  strength. 
This  led  to  experiments  to  determine  if  it  could  not  in  these  formulas 
be  replaced  by  ammonia  water  and  alcohol.  We  found  that  this 
was  feasible  and  have  framed  the  formulas  accordingly. 
Another  point  that  needs  emphasis,  is,  that  while  the  "  Liquid 
Petrox  "  will  answer  as  the  base  for  some  of  the  medications  or  com- 
poundS;,  it  cannot  be  used  alone  as  the  base  for  the  preparation  of 
many  of  the  important  formulas.  Such  preparations  as  Iodine 
Petrox,  10  per  cent.,  and  Iodoform  Petrox  cannot  be  made  by 
simple  solution  but  the  medicament  must  be  incorporated  by  proper 
manipulation  in  the  course  of  preparation.  In  others,  the  proportion 
of  oleic  acid  or  other  ingredient  must  be  somewhat  modified  to 
obtain  perfect  solution  and  a  satisfactory  product. 
The  methods  of  manipulation  as  directed  in  the  formulas,  are 
those  that  were  found  necessary  and  it  is  quite  important  that  these 
be  carefully  followed  as  deviation  or  careless  manipulation  may 
spoil  the  product. 
PETROXOLINUM  LIQUIDUM. 
Liquid  Petroxolin. 
Liquid  Petrolatum  
Oleic  Acid   
Oil  of  Lavender  Flowers  , 
Stronger  Ammonia  Water 
Alcohol   
Liquid  Petrox. 
50  Gm. 
28  Gm. 
2  Gm. 
5  Gm. 
15  Gm. 
