Assistive Medication Administration Personnel (AMAP) Practice Exam

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When preparing a tincture, what is a common base used in its formulation?

Oil
Alcohol
Vinegar
Water

The correct answer is: Alcohol

A tincture is typically defined as an extract made by soaking herbs or plant materials in a solvent to draw out beneficial compounds. The most common base for preparing a tincture is alcohol, specifically ethanol. Alcohol serves as an effective solvent because it can dissolve a wide range of phytochemicals, including alkaloids, terpenes, and flavonoids, which are often responsible for the therapeutic properties of the herbs. Using alcohol in the process also helps preserve the tincture, allowing it to have a longer shelf life compared to tinctures made with other bases. While options like oil, vinegar, and water can be used for other types of extracts or preparations, they do not provide the same range of extraction or preservation qualities that alcohol does in tincture-making. Therefore, alcohol is universally recognized as the standard base for tinctures in herbal medicine and pharmacology.