Oils
Medicated Oils of Traditional Medicine are generally prepared by infusing or decocting herbs in Oil. Lighter and more delicate parts such as flowers are generally infused in a sealed jar with oil for a week or 2. The infusion is often repeated 2 or 3 timers to make a more concentrated oily infusion.

More complex oils are formed by boiling herbs in oil, and to facilitate the extraction, often water is added and the boiling continues until the water evaporates.