NAPLEX (North American Pharmacist Licensure Examination) Practice Exam

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Which of these is a lubricant used to keep ingredients from sticking together?

  1. Glycerin

  2. Sorbitol

  3. Magnesium stearate

  4. Stevia

The correct answer is: Magnesium stearate

Magnesium stearate is the correct answer because it is commonly used in pharmaceuticals and supplements as a lubricant to prevent ingredients from sticking together during the manufacturing process. Glycerin and Sorbitol are commonly used as sweeteners and humectants, while Stevia is a natural sweetener. Although these other options are commonly used in pharmaceuticals, they do not serve the same function as a lubricant in preventing ingredients from sticking together.

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