A decongestant is a type of medication that helps relieve nasal blockage by reducing swelling and inflammation of the nasal passages. Decongestants work by narrowing the blood vessels in the nose, which reduces blood flow and decreases fluid buildup, allowing for easier breathing. These medications are commonly used to ease symptoms of blockage caused by allergies, colds, or sinus infections.

英語での「decongestant」の定義と意味

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