Postoperative Nausea and Vomiting
Postoperative Nausea and Vomiting
Postoperative nausea and vomiting (PONV) is a common complication after surgery. It can be caused by various factors such as previous history of PONV, anxiety or stress, pain management with opioids, and female gender. Treatment typically involves medications like Ondansetron (5-HT3 antagonist), Metoclopramide (Dopamine antagonist), Aprepitant (NK1 receptor antagonist), and Fosaprepitant (NK1 receptor antagonist).
Show Medications for Postoperative Nausea and Vomiting
18/05/2026
Updated: 12/06/2026
Postoperative Nausea and Vomiting (PONV)
What is Postoperative Nausea and Vomiting?
Postoperative nausea and vomiting (PONV) refers to the occurrence of nausea and vomiting after surgery. It is a common complication that can affect patients undergoing various types of surgical procedures.Key Symptoms
The key symptoms of PONV include:- Nausea: Feeling queasy or sick to your stomach.
- Vomiting: Bringing up food, liquids, or other contents from the stomach into the mouth.
- Hypotension: Low blood pressure, which can lead to dizziness and fainting.
- Tachycardia: Rapid heart rate, which can be a sign of stress on the body.
Diagnostic Tests
To diagnose PONV, your healthcare provider may order the following diagnostic tests:- Laboratory tests: Complete Blood Count (CBC) and Electrolyte panel to rule out underlying conditions that may be contributing to PONV.
- Radiological examination: Abdominal X-ray or Upper GI series to evaluate the digestive system for any abnormalities.
Standard Treatment Options
The standard treatment option for PONV is Ondansetron (5-HT3 antagonist). However, other alternatives may be considered based on individual patient needs. These include:- Metoclopramide (Dopamine antagonist)
- Aprepitant (NK1 receptor antagonist)
- Fosaprepitant (NK1 receptor antagonist)
Risk Factors
Certain factors can increase the risk of developing PONV. These include:- Previous history of postoperative nausea and vomiting
- Anxiety or stress
- Pain management with opioids
- Female gender
Treatment of Postoperative Nausea and Vomiting
Gold Standard Treatment: Ondansetron (5-HT3 antagonist)
Ondansetron is a selective 5-HT3 receptor antagonist that has been widely used as the gold standard treatment for postoperative nausea and vomiting. It works by blocking the action of serotonin, a neurotransmitter involved in nausea and vomiting, at the chemoreceptor trigger zone (CTZ) in the brain. This blockade prevents the stimulation of the vomiting center, thereby reducing the incidence and severity of postoperative nausea and vomiting.Alternative Treatments
Metoclopramide (Dopamine antagonist)
Metoclopramide is a dopamine antagonist that also has antiemetic properties. It works by blocking the action of dopamine, which can stimulate the vomiting center in the brain. Additionally, metoclopramide enhances gastrointestinal motility and increases gastric emptying, further reducing the risk of nausea and vomiting.
Aprepitant (NK1 receptor antagonist)
Aprepitant is a selective NK1 receptor antagonist that has been shown to be effective in preventing postoperative nausea and vomiting. It works by blocking the action of substance P, a neurotransmitter involved in nausea and vomiting, at the NK1 receptors in the brain.
Fosaprepitant (NK1 receptor antagonist)
Fosaprepitant is a prodrug of aprepitant that is metabolized to its active form. It works similarly to aprepitant by blocking the action of substance P at the NK1 receptors in the brain, thereby reducing the incidence and severity of postoperative nausea and vomiting.
Postoperative Nausea and Vomiting (PONV): Risk Factors
Introduction
Postoperative nausea and vomiting (PONV) is a common complication following surgical procedures, affecting a significant number of patients. Understanding the risk factors associated with PONV is crucial for effective prevention and management.Risk Factors for Postoperative Nausea and Vomiting
- Previous history of postoperative nausea and vomiting: Patients who have experienced PONV in the past are at a higher risk of experiencing it again. This suggests that there may be individual susceptibility to PONV.
- Anxiety or stress: High levels of anxiety or stress can contribute to the development of PONV. This highlights the importance of preoperative counseling and anxiolysis in reducing this risk factor.
- Pain management with opioids: The use of opioids for pain management has been linked to an increased risk of PONV. This may be due to the central nervous system effects of these medications, which can exacerbate nausea and vomiting.
- Female gender: Women are at a higher risk of developing PONV compared to men. The underlying mechanisms for this disparity are not fully understood but may relate to hormonal differences or other factors.