Clinical situation	Common treatment
Chemotherapy- and radiation-associated nausea and vomiting	Acute: ondansetron (Zofran) 32 mg IV or 24 mg orally 30 minutes before chemotherapy and dexamethasone 4 mg
	Delayed: metoclopramide (Reglan) 1 to 2 mg IV or orally every 2 to 4 hours and dexamethasone 4 mg²
Cyclic vomiting syndrome	Supportive, and possible tricyclic antidepressants for adults^25,26
Gastroparesis	Supportive, and possible gastric pacing²⁴
Postoperative nausea and vomiting	Droperidol (Inapsine*) 1.25 mg IV and dexamethasone 4 mg IV within 20 minutes of anesthesia; or ondansetron 4 mg IV during the last 20 minutes of surgery²⁰
Pregnancy: hyperemesis gravidarum	Prochlorperazine 5 to 10 mg IM, chlorpromazine (Thorazine*) 10 to 25 mg orally, metoclopramide² 1 to 2 mg IV, and methylprednisolone (DepoMedrol)²³
Pregnancy: morning sickness	Meclizine (Antivert) 25 to 50 mg orally and promethazine (Phenergan) 12.5 to 50 mg orally or IV, electrolyte replacement, thiamine supplementation^21,22