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Determining Drug Amounts for Compounding
Determine the amounts of each ingredient to use in the following compounded prescription:
Resorcinol17% (w/w)
Hyoscyamine hydrobromide1:1500 (w/w)
Propylene glycol30 g
White ointmentq.s. a.d. 300 g
Mix and make topical ointment
Sig: Use as directed
Ingredients available for compounding include:
  • Resorcinol bulk powder
  • Hyoscyamine hydrobromide 40% (w/v) stock solution (specific gravity is 0.97)
  • Propylene glycol liquid (specific gravity is 1.27)
ANSWER (round to 1 decimal place)
 
Weight of Resorcinol = g




ANSWER (round to 2 decimal places)
 
Weight of required
Hyoscyamine hydrobromide 40% (w/v)
stock solution = g




ANSWER (round to nearest whole number)
 
Volume of Propylene glycol liquid = mL




ANSWER (round to 1 decimal place)
 
Weight of White ointment = g