Which medication and dose is listed for nausea and vomiting in adults?

Which medication and dose is listed for nausea and vomiting in adults?

• A. Ondansetron (Zofran) 4 mg ODT/IM/IV/IO
• B. Metoclopramide 10 mg slow IVP over 1-2 mins or IM
• C. Droperidol 1.25 mg IM/IV/IO
• D. Prochlorperazine up to 10 mg IV/IM/IO

Answer: (A)

The test is checking which antiemetic is listed with a standard adult dose that EMS can easily use across multiple routes. Ondansetron is a selective 5-HT3 receptor antagonist that effectively stops nausea and vomiting with a clean safety profile, making it the preferred choice in many prehospital protocols. The common adult dose listed for ondansetron across routes (oral dissolving tablet, IM, IV, or IO) is 4 mg, which is why this option is the best fit for “medication and dose” in adults. Other drugs shown have different doses and notable cautions that limit their use in the field: metoclopramide is listed at 10 mg but carries higher risks of extrapyramidal effects and is often dosed with caution; droperidol is 1.25 mg but has QT prolongation concerns and regulatory restrictions; prochlorperazine can be used up to 10 mg but also has extrapyramidal and sedative risks. The 4 mg dose of ondansetron across multiple routes aligns with common EMS practice and safety considerations, making it the most appropriate listed option.

The test is checking which antiemetic is listed with a standard adult dose that EMS can easily use across multiple routes. Ondansetron is a selective 5-HT3 receptor antagonist that effectively stops nausea and vomiting with a clean safety profile, making it the preferred choice in many prehospital protocols. The common adult dose listed for ondansetron across routes (oral dissolving tablet, IM, IV, or IO) is 4 mg, which is why this option is the best fit for “medication and dose” in adults.

Other drugs shown have different doses and notable cautions that limit their use in the field: metoclopramide is listed at 10 mg but carries higher risks of extrapyramidal effects and is often dosed with caution; droperidol is 1.25 mg but has QT prolongation concerns and regulatory restrictions; prochlorperazine can be used up to 10 mg but also has extrapyramidal and sedative risks. The 4 mg dose of ondansetron across multiple routes aligns with common EMS practice and safety considerations, making it the most appropriate listed option.