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Vomiting is a common condition affecting about 50% of pregnant women, with another 25% having nausea. [48] However, the incidence of HG is only 0.3–1.5%. [ 4 ] After preterm labor, hyperemesis gravidarum is the second most common reason for hospital admission during the first half of pregnancy. [ 16 ]
Drug reaction (vomiting may occur as an acute somatic response to): [citation needed] Alcohol, which can be partially oxidized into acetaldehyde that causes the symptoms of hangover, including nausea, vomiting, shortness of breath, and fast heart rate. [22] Opioids; Selective serotonin reuptake inhibitors; Many chemotherapy drugs
The neurotransmitters implicated in the control of nausea and vomiting include acetylcholine, dopamine, histamine (H1 receptor), substance P (NK-1 receptor), and serotonin (5-HT3 receptor). There are also opioid receptors present, which may be involved in the mechanism by which opiates cause nausea and vomiting.
Morning sickness, also called nausea and vomiting of pregnancy (NVP), is a symptom of pregnancy that involves nausea or vomiting. [1] Despite the name, nausea or vomiting can occur at any time during the day. [2] Typically the symptoms occur between the 4th and 16th weeks of pregnancy. [2]
Recovery phase is typically the phase where vomiting ceases, nausea diminishes or is absent, and appetite returns. "Cyclic vomiting syndrome (CVS) is a rare abnormality of the neuroendocrine system that affects 2% of children." [1] This disorder is thought to be closely related to migraines and family history of migraines. [2] [3]
Other possible symptoms include nausea and vomiting, bloating, loss of appetite and heartburn. [1] [2] Complications may include stomach bleeding, stomach ulcers, and stomach tumors. [1] When due to autoimmune problems, low red blood cells due to not enough vitamin B12 may occur, a condition known as pernicious anemia. [3]
The best-studied alternative therapy is perhaps the use of acupressure for pregnancy-related nausea and vomiting. [ citation needed ] Wristbands with acupressure buttons are commercially available. An implanted device with attached electrodes into the gastric wall can be an option for patients with refractory nausea and vomiting.
Nausea and vomiting associated with migraine headaches respond best to dopamine antagonists such as metoclopramide, prochlorperazine, and chlorpromazine. [22] In cases of gastroenteritis, serotonin antagonists such as ondansetron were found to suppress nausea and vomiting, as well as reduce the need for IV fluid resuscitation. [ 22 ]