What is an Ointment?
An ointment is a semisolid preparation intended primarily for application to the skin or certain mucosal surfaces. Ointments commonly contain a drug incorporated into a suitable ointment base.
Types of Ointment Bases
- Hydrocarbon bases
- Absorption bases
- Water-removable bases
- Water-soluble bases
Ideal Properties
- Suitable consistency
- Good spreadability
- Physical and chemical stability
- Compatibility with the drug and container
- Appropriate release of the drug
Pharmaceutical Applications
Ointments are commonly used for topical drug delivery and may provide an occlusive effect depending on the base.
Ointment vs Cream
Ointments are generally more greasy and occlusive than many creams, although the exact properties depend on the formulation.
Quick Revision
Ointment = semisolid preparation containing drug in a suitable base, mainly used for topical application.