Nausea and vomiting are common adverse effects of radiation and chemotherapy. When should a nurse administer antiemetics?
A. 30 minutes before the initiation of therapy.
B. With the administration of therapy.
C. Immediately after nausea begins.
D. When therapy is completed.
Answer: A
Explanation: Antiemetics are most beneficial when given before the onset of nausea and vomiting. To calculate the optimum time for administration, the first dose is given 30 minutes to 1 hour before nausea is expected, and then every 2, 4, or 6 hours for approximately 24 hours after chemotherapy. If the antiemetic was given with the medication or after the medication, it could lose its maximum effectiveness when needed.
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