Which topical dosage form contains more oil than water and has a greasy feel?

An ointment is a topical dosage form specifically designed to contain a higher proportion of oil than water, resulting in a greasy texture that provides a number of beneficial properties for the skin. This greasy feel is advantageous for occlusion, as it helps to retain moisture within the skin and protects it from external irritants.

Ointments are particularly effective for dry, scaly skin conditions because they create a barrier on the skin that prevents transepidermal water loss. Their oiliness facilitates the delivery of active ingredients across the skin, making them suitable for therapeutic applications where prolonged contact with the skin is necessary.

In contrast, a paste typically contains a much higher concentration of solids and has a thicker consistency; it is less greasy than an ointment. Creams, on the other hand, usually have equal proportions of oil and water, leading to a more balanced, less greasy feel on the skin. Emulsions are mixtures where oil and water are combined, but they often do not have the same oil content as ointments, making them lighter and less greasy. Thus, the distinct property of ointments being predominantly oil-based and the resulting greasy feel confirms its identity as the correct choice for this question.