PHR2021: Lab 7

Learning objectives

  • Prepare and dispense ointments for external use
  • Familiar with non-standard formulations (non-APF)
  • Do so with correct methods (spatula on glass slab)
  • Generate appropriate documentation and labelling
  • Produce a product that is cleanly presented
PHR2021: Lab 7

Batch Record

Name: Liquid Paraffin (50%) and White Soft Paraffin (50%) ointment
Batch Number: Discretionary

Batch number Ingredient Formula QD
123456 Liquid Paraffin 50% 25 g / 29.1 mL†
123456 White Soft Paraffin 50% 25 g

† 25 g or ~30 mL () but never 25 mL.

PHR2021: Lab 7

Prescription Record

  • Date: Today's Date
  • Patient's Name: Ms Chyou Li
  • Patient's Address: 97 Chester St, Pharmville
  • Copy of prescription: Rx ...
  • Batch No: [Discretionary]
  • Prescriber: Lel Mester
  • Prescription #: [Discretionary]
  • Dispensing Pharmacist: Your Initials
PHR2021: Lab 7

Preparation

  1. On a glass slab, triturate liquid paraffin (LP) with WSP by placing a small amount of LP into a portion of the WSP via a recess made in the portion of WSP that is present on the slab
  • Measure out 31 mL so that when you add the LP to the WSP, 2 mL can be left behind in the conical flask and the accurate amount of LP will be in the product.
  • WSP should be weighed onto weighing paper and transferred directly onto the slab, otherwise you lose too much product
  1. LP is then worked into the WSP by a stirring method with a spatula
  2. Continue to incorporate LP into WSP by trituration until all the LP has been uniformly incorporated into the base and a smooth ointment with a light consistency is achieved.
PHR2021: Lab 7
  1. With a spatula, transfer the contents to an amber class jar (Martindale 31 stipulates that LP needs to be protected from light)
  2. Ensure that the ointment is pressed into the bottom/sides of the jar then smooth out the top of the ointment with the spatula so that an even appearance is visible
  3. Clean up the sides/lip of the jar with alcohol and remove excess
PHR2021: Lab 7

Preservative Calcs

None needed

  • Ointments and Oily creams do not need preservatives
PHR2021: Lab 7

Label

KEEP OUT OF REACH OF CHILDREN<
FOR EXTERNAL USE ONLY

Liquid Paraffin (50% w/w) and White Soft Paraffin (50% w/w) ointment (50 g)
Apply to the affected area when necessary.

Ms Chyoi Li
Prescription No.
Date
Dr L. Lester
Dispenser's Initials
Expiry Date: 13 May 2025

STORE BELOW 25°C

PROTECT FROM LIGHT

PHR2021: Lab 7

Counselling

  • May stain the skin, hair and clothes
  • Do not apply to broken skin
  • Avoid contact with eyes and mucous membranes
  • May be irritating
PHR2021: Lab 7

Corollary

  • Suggested CALs:

Specific to the formulation
CAL 7

General label for ointments
CAL 7

PHR2021: Lab 7

On Compounding Exam

  • Bring a laptop to access MyDispense on the day
  • There will be pre-determined seating arrangements