| Medications and toxic etiologies | | Cancer chemotherapy | - Severe – cisplatinum, dacarbazine, nitrogen mustard
| - Moderate – etoposide, methotrexate, cytarabine
| - Mild – fluorouracil, vinblastine, tamoxifen
| | Analgesics | | | - Nonsteroidal antiinflammatory drugs
| | | | | | Cardiovascular medications | | | | | | | | | - Calcium channel antagonists
| | Diuretics | | Hormonal preparations/therapies | | | | | | Antibiotics/antivirals | | | | | | | | | | | | Gastrointestinal medications | | | | | | Nicotine | | CNS active drugs | | | | | | | | Antiasthmatics | | | | Radiation therapy | | Ethanol abuse | | Jamaican vomiting sickness | | Hypervitaminosis | | | Infectious causes | | Gastroenteritis | | | | | | Nongastrointestinal infections | | | | Disorders of the gut and peritoneum | | Mechanical obstruction | - Gastric outlet obstruction
| | | | Functional gastrointestinal disorders | | Gastroparesis | | Chronic intestinal pseudo-obstruction | | Nonulcer dyspepsia | | Irritable bowel syndrome | | Organic gastrointestinal disorders | - Pancreatic adenocarcinoma
| - Inflammatory intraperitoneal disease
| | | | | | | | | | | | | | | | | | | CNS causes | | Migraine | | Increased intracranial pressure | | | | | | | | | | | | | | | | | | Seizure disorders | | Demyelinating disorders | | Cranial radiation | | Emotional responses | | Psychiatric disease | | | | | | | | | | | | | | Labyrinthine disorders | | | | | | | | | | | | | | Endocrinologic and metabolic causes | | Pregnancy | | Other endocrine and metabolic | | | | | | | | | | | | | - Acute intermittent porphyria
| | Miscellaneous causes | | Postoperative nausea and vomiting | | Cyclic vomiting syndrome | | Cannabis hyperemesis syndrome | | Cardiac disease | | | | | - Radiofrequency ablation of the liver
| | Starvation | | Radiation therapy to the upper abdomen and lower chest | |
