Terfenadine was developed as a ________ ________.

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Multiple Choice

Terfenadine was developed as a ________ ________.

Explanation:
Terfenadine was developed as a non-sedating antihistamine. The aim was to block histamine H1 receptors responsible for allergic symptoms while minimizing penetration into the central nervous system, so it would not cause the drowsiness that older, sedating antihistamines produced. That’s why the best choice describes it as a non-sedating antihistamine. The other options don’t fit the intended design: sedating would defeat the purpose of avoiding drowsiness, analgesic isn’t about allergy symptoms, and antihistamine is correct but does not capture the key feature being emphasized. (In practice, terfenadine is metabolized to fexofenadine, which is also non-sedating.)

Terfenadine was developed as a non-sedating antihistamine. The aim was to block histamine H1 receptors responsible for allergic symptoms while minimizing penetration into the central nervous system, so it would not cause the drowsiness that older, sedating antihistamines produced. That’s why the best choice describes it as a non-sedating antihistamine. The other options don’t fit the intended design: sedating would defeat the purpose of avoiding drowsiness, analgesic isn’t about allergy symptoms, and antihistamine is correct but does not capture the key feature being emphasized. (In practice, terfenadine is metabolized to fexofenadine, which is also non-sedating.)

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