Practice Quiz

Registered Dietitian

Category - Nutrition Care

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Drinking grapefruit juice should be avoided when taking some medications, including antihistamines and calcium channel blockers, because of which of the following reasons? (Choose all that apply.)
  1. The grapefruit juice may interact with the medication and cause a food allergy.
  2. A substance in the grapefruit juice may inhibit the metabolism of the medication in the body.
  3. The acid in grapefruit juice inactivates the medications.
  4. None of the above
Explanation
Answer: B - Drinking grapefruit juice should be avoided when taking some medications because a substance in the juice called naringenin may inhibit the metabolism of the medication in the body, and cause it to rise to dangerous levels in the bloodstream.
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