Nausea and vomiting classification
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Nausea and vomiting can be classified into acute or chronic
Acute vomiting which typically lasts from a few hours to few days is the most common presentation in the emergency department. Acute vomiting needs an extensive workup to exclude life-threatening conditions like bowel obstruction, mesenteric ischemia, acute pancreatitis, and possibly myocardial infarction.
Based on the duration of symptoms it can be classified as
It typically lasts from few hours to few days
Chemotherapy is one of the most common cause of nausea and vomiting, and
Chemotherapy induced nausea and vomiting can be classified as
Delayed CINV can occur at least 24 hours after chemotherapy and peaks between 48-72 hours 
- Lacy BE, Parkman HP, Camilleri M (May 2018). "Chronic nausea and vomiting: evaluation and treatment". Am J Gastroenterol. 113 (5): 647–659. doi:10.1038/s41395-018-0039-2. PMID 29545633.
- Navari RM (2003). "Pathogenesis-based treatment of chemotherapy-induced nausea and vomiting--two new agents". J Support Oncol. 1 (2): 89–103. PMID 15352652.
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- Jordan K, Kasper C, Schmoll HJ (January 2005). "Chemotherapy-induced nausea and vomiting: current and new standards in the antiemetic prophylaxis and treatment". Eur J Cancer. 41 (2): 199–205. doi:10.1016/j.ejca.2004.09.026. PMID 15661543.