Management of Vancomycin-Induced Nausea and Appetite Loss

First-Line Management Approach

The American College of Physicians and other guideline societies recommend initiating treatment with a dopamine receptor antagonist such as metoclopramide (10-20 mg every 6 hours) or prochlorperazine (5-10 mg every 6 hours) as first-line therapy for vancomycin-induced nausea and appetite loss, with the strongest evidence for treating medication-induced nausea 1, 2
Dopamine receptor antagonists, including metoclopramide 10-20 mg every 6 hours, prochlorperazine 5-10 mg every 6 hours, and haloperidol 0.5-2 mg every 4-6 hours, are recommended as first-line therapy for vancomycin-induced nausea and appetite loss 1, 2, 3
Olanzapine 2.5-5 mg daily is particularly effective and may stimulate appetite, with a high strength of evidence for its use in treating vancomycin-induced nausea and appetite loss 1, 3
Antiemetics should be scheduled around-the-clock rather than as-needed for persistent nausea, with a moderate strength of evidence for this approach 1
If anxiety contributes to nausea, consider adding lorazepam 0.5-1 mg every 4 hours as needed, with a low strength of evidence for this approach 2, 3

If nausea persists despite first-line treatment, add a 5-HT3 receptor antagonist such as ondansetron 4-8 mg every 8-12 hours or granisetron 1 mg twice daily or transdermal patch, with a moderate strength of evidence for this approach 1, 4
Consider adding an anticholinergic agent (scopolamine) or antihistamine (meclizine) for persistent symptoms, with a low strength of evidence for this approach 4, 5
For refractory symptoms, add dexamethasone 4-8 mg daily, which can both reduce nausea and stimulate appetite, with a high strength of evidence for its use in treating vancomycin-induced nausea and appetite loss 1, 6

Ensure adequate hydration, as dehydration can worsen nausea symptoms, with a moderate strength of evidence for this approach 3

Offer small, frequent meals rather than large meals to help manage nausea, with a moderate strength of evidence for this approach 7
Consider nutritional supplements between meals rather than with meals, with a moderate strength of evidence for this approach 7
Avoid foods with strong odors that may trigger nausea, with a low strength of evidence for this approach 2
Cold foods may be better tolerated than hot foods, which have stronger aromas, with a low strength of evidence for this approach 7

Reassess nausea control and appetite within 24-48 hours of initiating treatment, with a moderate strength of evidence for this approach 4
Monitor for side effects of antiemetics, particularly extrapyramidal symptoms with metoclopramide and sedation with olanzapine, with a high strength of evidence for this approach 1
Watch for constipation, which can be a side effect of 5-HT3 antagonists and may worsen overall comfort, with a moderate strength of evidence for this approach 1

Consider continuous IV/subcutaneous infusion of antiemetics if oral medications are not tolerated, with a moderate strength of evidence for this approach 2, 8
Non-pharmacological approaches can be added, including acupuncture, hypnosis, or cognitive behavioral therapy, with a low strength of evidence for this approach 2, 6
If the patient is also on opioids, consider opioid rotation as this may contribute to nausea, with a moderate strength of evidence for this approach 1, 8

Starting with too high doses of antiemetics in elderly or debilitated patients; begin with lower doses (e.g., olanzapine 2.5 mg), with a high strength of evidence for this approach 1
Failing to treat around-the-clock for persistent symptoms, with a moderate strength of evidence for this approach 4
Not considering drug interactions between vancomycin and antiemetics, with a moderate strength of evidence for this approach 3