Management of Nausea in Clinical Practice

Initial Assessment and Treatment

The National Comprehensive Cancer Network recommends first-line treatment with dopamine receptor antagonists, such as prochlorperazine (5-10 mg PO/IV every 6 hours) or metoclopramide (10-20 mg PO/IV every 6 hours), for patients presenting with nausea, with 5-HT3 antagonists like ondansetron (4-8 mg) reserved for refractory cases 1, 2
Evaluate patients for specific causes of nausea, including medication-induced, gastrointestinal disorders, metabolic abnormalities, and disease-specific causes, and check medication lists for common nausea-inducing drugs (e.g. opioids, digoxin, phenytoin, carbamazepine, tricyclic antidepressants) 1, 2

For non-specific nausea and vomiting, the National Comprehensive Cancer Network recommends first-line treatment with dopamine receptor antagonists, such as haloperidol (0.5-1 mg PO every 6-8 hours) or metoclopramide (10-20 mg PO/IV every 6 hours) 3, 1
For chemotherapy-induced nausea, the American Society of Clinical Oncology recommends first-line treatment with 5-HT3 receptor antagonists, such as ondansetron (8 mg PO/IV every 8-12 hours) or granisetron (1 mg PO twice daily), with the addition of dexamethasone (4-8 mg daily) to enhance antiemetic effect 5, 4
For opioid-induced nausea, prophylactic treatment with antiemetics is highly recommended, and consider opioid rotation if nausea persists after a trial of several antiemetics 3

If nausea persists despite as-needed regimen, administer antiemetics around the clock for one week, and consider adding a 5-HT3 antagonist (ondansetron 4-8 mg) if first-line agents are ineffective 3, 1
For methotrexate-induced nausea, ondansetron given at 8 mg 2 hours before the dose and repeated 12 and 24 hours later can be effective 6

The National Comprehensive Cancer Network recommends eating small, frequent meals and avoiding trigger foods, and consider dietary consultation for persistent nausea 2
Behavioral therapy techniques may help with anticipatory nausea, and taking medication with food or before bedtime may help reduce symptoms 2, 6