Based on Therapeutic Properties with Penetration

Epidermic Ointments: These ointments are intended to produce localized effect on the skin surface. They are not absorbed completely. They are used as protectives, antiseptics, and parasiticides.
Endodermic Ointments: These ointments are intended to release the medicaments that penetrate into the layers of the skin to produce local action. They act as emollients, stimulants, local irritants and are anti-inflammatory in nature.
Diadermic Ointments: These ointments when applied to the skin penetrate deeply through the layers of the skin and mix with the blood circulation to produce systemic effect. The ointments used in the treatment of hemorrhoids are diadermic ointments.

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