What are oleaginous ointment bases?

Oleaginous ointment bases are non-water-soluble, greasy substances used in topical formulations. They are primarily composed of oils and fats, which provide a thick, occlusive layer on the skin, promoting moisture retention and enhancing drug absorption. Common examples include petrolatum, mineral oil, and various waxes. These bases are ideal for delivering lipophilic (fat-soluble) drugs and are often used for their emollient properties.