Page 45 - A Guide to Dosage Form 1

26. Is Compound Tragacanth Powder BP suitable for external use? Give your reason.

27. Give one important auxiliary label for suspension.

28. What is the definition of an emulsion?

29. Is there a need to incorporate preservative and antioxidant in an emulsion? State your

reason.

30. Why do you need to use distilled water in the preparation of an emulsion?

31. State the O:W:A ratio for fixed oil, volatile oil and mineral oil.

32. Give two examples of mineral oil.

33. Give two examples of emulgents from different classes (two for each class).

34. You are asked to prepare 200 mL emulsion with Liquid Paraffin BP 36%, Amaranth BP
0.5% and Syrup BP 10%. How much Acacia BP would be needed to prepare this

emulsion?

35. How much Acacia BP will be needed to prepare 75 mL of an emulsion with 15%
Cinnamin oil?

36. Prepare a full formula to prepare Maize oil 25% v/v emulsion for a 25-year-old patient.

37. Why is hygiene important in preparing a cream?

38. The most suitable way to incorporate a course insoluble powder into a molten
ointment base will be through trituration/fusion/levigation/titration.

Answers

1. 90 mL of 70% IPA and 30mL of 30% IPA solution
2. 266 mg/mL Drug A, 0.007 mg/mL (0.7%w/v)

3. 7.5 mL
4. 10.5 mL

5. 4.07 L
6. 10 000
7. 500 mg