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Hospital Corpsman (HM) Personnel Qualification Standards (PQS) Practice Test

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Guaifenesin is commonly marketed under which trade name?
Correct Answer:
Mucinex
Explanation:
Guaifenesin is an expectorant used to thin and loosen mucus, helping you cough it up more easily. The trade name most strongly associated with this active ingredient in over-the-counter products is Mucinex. It’s the brand that has become the go-to for guaifenesin formulations, often as extended-release tablets designed to be taken once daily. The other options correspond to different ingredients or formulations: Delsym is known for a cough suppressant containing dextromethorphan, not guaifenesin; Robitussin is a brand with various formulas, some containing guaifenesin among other actives, but it’s not the brand that uniquely identifies guaifenesin; Benadryl is an antihistamine used for allergies and cough but not the guaifenesin line.

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