This page was generated by AI. It is not a source of trustworthy medical information.
The curated page (written by a real person) is here
other ai pages: 4-aminopyridine | SERC_sources | benzodiazepines | benzodiazepines_vertigo | calcium_channel | cannabis | carbonic_anhydrase | central | cinnarizine | drugrx | drugs_vestibular_compensation | ear_drops | fall_drugs | glutamate | index | ketamine | ldn | lipoflavonoids | nac | pentoxifylline | pentoxifyllline | serc | steroids | verapamil | vestibular_compensation
Emesis, commonly referred to as vomiting, is the forceful expulsion of stomach contents through the mouth. It is often preceded by nausea, an unpleasant sensation of the urge to vomit. Both nausea and vomiting are symptoms of an underlying condition rather than a disease in themselves. They can be triggered by a wide range of factors, including viral or bacterial infections, food poisoning, motion sickness, pregnancy, certain medications, chemotherapy, and conditions affecting the digestive system or the brain.
Treatment of emesis focuses on relieving symptoms, preventing complications such as dehydration, and addressing the root cause. Effective management often requires a combination of lifestyle measures and medications tailored to the individual's situation.
For mild nausea and vomiting, simple supportive measures are often sufficient. Staying hydrated is essential, but drinking large amounts of fluid at once can worsen vomiting. Frequent sips of clear liquids such as water, broths, or oral rehydration solutions are recommended. Electrolyte solutions help replace lost salts and minerals.
Dietary changes can also help. Avoiding solid food for a few hours allows the stomach to settle. When food is reintroduced, bland, easily digestible options such as crackers, toast, rice, bananas, or boiled potatoes are generally well tolerated. Eating small, frequent meals rather than large ones may reduce pressure on the stomach. Fatty, fried, and highly spicy foods should be avoided during recovery. In some cases, ginger has been found to reduce nausea, and acupressure at the wrist is a non-invasive technique that some people find helpful.
When vomiting is severe or persistent, antiemetic medications may be necessary. These drugs work by blocking specific receptors in the brain and digestive tract that trigger the vomiting reflex. The choice of medication depends on the cause of emesis.
Serotonin (5-HT3) receptor antagonists are highly effective for nausea and vomiting caused by chemotherapy, radiation, or surgery. These medications are often given before chemotherapy to prevent symptoms from developing.
Antihistamines and anticholinergics are commonly used for motion sickness and inner ear disorders. These drugs are most effective when taken before symptoms begin.
Dopamine receptor antagonists such as metoclopramide and prochlorperazine are useful for treating vomiting associated with gastroparesis, migraine, and certain digestive disorders. They also promote gastric emptying.
Neurokinin-1 receptor antagonists are a newer class of medications used primarily to prevent delayed nausea and vomiting following chemotherapy.
Corticosteroids are sometimes used in combination with other antiemetics, especially in cancer treatment, to enhance their effectiveness.
Benzodiazepines may be helpful for anxiety-related anticipatory nausea in chemotherapy patients, though they are not primary antiemetic agents.
For patients who are dehydrated or unable to keep fluids down, intravenous fluid therapy and medications administered by injection or suppository may be required, usually in a hospital or urgent care setting.
Most cases of viral gastroenteritis resolve on their own within a few days. The main goal is to prevent dehydration. Antibiotics are only used when a bacterial cause is confirmed, and antidiarrheal medications are generally not recommended for infectious diarrhea with vomiting.
Nausea and vomiting are common in early pregnancy. Lifestyle changes, dietary modifications, pyridoxine (vitamin B6), and ginger are often tried first. When symptoms are severe and lead to weight loss and dehydration, a condition called hyperemesis gravidarum, stronger antiemetic medications may be prescribed under medical supervision.
Patients receiving chemotherapy may be given combination antiemetic therapy before treatment begins. The regimen is selected based on the emetogenic potential of the chemotherapy drugs and is continued for several days after treatment. This approach has greatly improved the quality of life for cancer patients.
Surgical anesthesia can trigger vomiting. Preventive antiemetics are often given during surgery to high-risk patients. Keeping the patient relaxed and well-hydrated after surgery also helps reduce symptoms.
For motion sickness, behavioural measures such as focusing on the horizon, opening a window for fresh air, and sitting in a position where motion is least felt can help. Medications like antihistamines are most effective when taken before travel begins.
Medical care should be sought if vomiting lasts longer than two days in adults, longer than 24 hours in children, or more than 12 hours in infants. Red flags include signs of dehydration such as dizziness, dark urine, dry mouth, and reduced urination; the inability to keep any fluids down; vomiting blood or bile; severe abdominal pain; confusion; and a high fever. Prompt treatment can prevent serious complications and address potentially dangerous underlying conditions.