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. 2013 Jan;5(1):5–16.

Table 5. Antiemetics based on recommendations by the American College of Physicians.

Drug Cause of nausea Dose
Prochlorperazine Initiation of opioid therapy 10 mg orally or 25 mg rectally, 2 or 3 times daily
Haloperidol Stimulation of chemoreceptor 1.5–5 mg, orally 3–4 times daily; 2–10 mg
Intramuscularly, 2 or 3 times daily
Prochlorperazine Trigger zone by chemotherapy 10 mg orally or 25 mg rectally, 2 or 3 times daily
Methotrimeprazine 2–6.25 mg intramuscularly, 3 times daily;
6–25 mg, over 24 h
Scopolamine (transdermal patch) Vertigo Apply 1 patch every 2–3 days
Meclizine
50 mg orally or 25–50 mg intramuscularly, 3 times daily
Metoclopramide Delayed gastric emptying 10–20 mg, 2–3 times daily; 1–3 mg h intravenously
Octreotide Bowel obstruction 50–100 lg subcutaneously 2 or 3 times daily or 300 lg
During 24hours subcutaneously
Ondansetron Multiple causes, refractory 4–8 mg orally, 2 or 3 times daily
Dexamethasone 2–4 mg orally, 2 or 3 times daily