Which dosage form is an oil-base preparation generally applied to dry or scaly skin?

• A. Cream
• B. Ointment
• C. Paste
• D. Transdermal

Answer: (B)

When skin is dry or scaly, you want a preparation that stays on the surface and locks in moisture. Oil-based bases provide a strong occlusive film that reduces water loss from the skin and helps soften and restore the protective lipids. An ointment is precisely this type of oil-based, greasy preparation, forming a barrier on the skin and delivering lipids to the outer layers. This makes it particularly effective for dry skin.

In contrast, creams are emulsions with more water content, so they feel lighter and are less occlusive, which is good for cosmetic feel but not as protective for severely dry skin. Pastes are thicker and often contain powders; they can protect surfaces but don’t offer the same level of occlusion and moisturization as ointments. Transdermal refers to a route or patch designed for systemic delivery, not a topical moisturizer for dry skin. So, the oil-base, occlusive option best suited for dry or scaly skin is the ointment.