Why is it important for an ointment base to have a softening point near body temperature?

• A. Ensures it remains hard in storage
• B. Prevents evaporation of solvents
• C. Keeps it from absorbing water
• D. Allows it to soften at body temperature for easy spreading

Answer: (D)

The main idea is that the consistency of an ointment base at skin temperature governs how easily it can be applied and how well the drug is released. If the base softens near body temperature, it sits solid in storage but becomes pliable when applied to the skin. This makes it easy to spread into a thin, uniform layer, which ensures good contact with the skin and enables the drug to diffuse through the skin more effectively.

If the base stays hard at skin temperature, spreading becomes difficult and the drug may not release well. If it were too soft even at room temperature, it could be too runny or destabilize during storage, making dosing and handling problematic. So, having a softening point near body temperature optimizes both application comfort and drug delivery.