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Chemotherapy-Induced Nausea and Vomiting: 5-HT3 Receptor Antagonists

Chemotherapy-Induced Nausea and Vomiting: 5-HT₃ Receptor Antagonists

5-HT3 receptor antagonists, such as dolasetron, granisetron (Kytril), ondansetron (Zofran), and palonosetron (Axoli), are crucial in managing chemotherapy-induced nausea and vomiting (CINV) and postoperative nausea. These drugs selectively block 5-HT3 receptors in the visceral vagal and spinal afferent nerves, chemoreceptor trigger zone, and the vomiting center. They have a rapid onset of action and can be given as a single dose before chemotherapy. Ondansetron and granisetron, in particular,...

Chemotherapy-Induced Nausea and Vomiting: Neurokinin-1 Receptor Antagonists

Chemotherapy-Induced Nausea and Vomiting: Neurokinin-1 Receptor Antagonists

Neurokinin 1 (NK1) receptors are distributed across the GI tract, vagal afferents, and key CNS regions including the central vomiting center and chemoreceptor trigger zone (CTZ) Chemotherapy agents stimulate enterochromaffin cells in the gastrointestinal (GI) tract to release large amounts of substance P (SP). SP is a neuropeptide released by specific sensory nerves in response to many different stressors, including those in the GI mucosa affected by chemotherapy. SP binds and activates these...

Chemotherapy-Induced Nausea and Vomiting: Dopamine Receptor Antagonists

Chemotherapy-Induced Nausea and Vomiting: Dopamine Receptor Antagonists

Dopamine receptor antagonists, also known as antipsychotic agents, are critical in managing chemotherapy-induced vomiting. These antiemetic agents block dopamine receptors in the chemoreceptor trigger zone (CTZ), inhibiting signal transmission to the vomiting center. Antipsychotic agents encompass phenothiazines (PTZ), butyrophenones, benzamides, and thienobenzodiazepines (Zyprexa), which are utilized for their antiemetic and sedative properties.
Phenothiazines, such as prochlorperazine...

Chemotherapy-Induced Nausea and Vomiting: Cannabinoids

Chemotherapy-Induced Nausea and Vomiting: Cannabinoids

Tetrahydrocannabinol (THC) is a phytocannabinoid that primarily interacts with the CB1 receptor, a type of G protein-coupled receptor (GPCR) predominantly in and around the chemoreceptor trigger zone (CTZ) and emetic center. THC also blocks the serotonin receptor activity in the dorsal vagal complex (DVC) by inhibiting serotonin release. THC exerts its anti-emetic effects through these interactions, which are beneficial for patients undergoing chemotherapy.
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Pathophysiology of Vomiting

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Vomiting is a complex physiological response to expel harmful or irritating substances from the body. It's a defensive mechanism triggered by stimuli like poisons, microbial toxins, cytotoxic drugs, and mechanical abdominal distension. The process is centrally coordinated by the vomiting (or emetic) center located in the medulla of the brainstem. This area, rich in muscarinic M1, histamine H1, neurokinin 1 (NK1), and serotonin 5-HT3 receptors, coordinates the act of vomiting through interaction...

Radiological Investigation III: Pulmonary Angiogram and PET Scan

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Radiological investigations are paramount in the diagnosis and management of various pulmonary diseases. Two essential investigations are the Pulmonary Angiogram and the Positron Emission Tomography (PET) Scan.
Pulmonary Angiogram
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Related Experiment Video

Updated: May 27, 2026

Acupoint Application Combined with Acupressure as an Adjunctive Therapy for Chemotherapy-Induced Nausea and Vomiting

Acupoint Application Combined with Acupressure as an Adjunctive Therapy for Chemotherapy-Induced Nausea and Vomiting

Published on: June 21, 2024

Radiotherapy-induced nausea and vomiting.

Kristopher Dennis¹, Ernesto Maranzano, Carlo De Angelis

¹Radiation Oncology and Pharmacy Departments, Odette Cancer Centre, Sunnybrook Health Sciences Centre, University of Toronto, 2075 Bayview Avenue, Toronto, Ontario, Canada.

Expert Review of Pharmacoeconomics & Outcomes Research

|November 22, 2011

Summary

This summary is machine-generated.

Radiotherapy-induced nausea and vomiting (RINV) are common side effects of cancer treatment. This review examines current guidelines, challenges, and solutions for improving RINV prevention and patient care.

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Last Updated: May 27, 2026

Acupoint Application Combined with Acupressure as an Adjunctive Therapy for Chemotherapy-Induced Nausea and Vomiting

Acupoint Application Combined with Acupressure as an Adjunctive Therapy for Chemotherapy-Induced Nausea and Vomiting

Published on: June 21, 2024

Area of Science:

Oncology
Palliative Care

Background:

Radiotherapy-induced nausea and vomiting (RINV) significantly impact patient quality of life during cancer treatment.
Despite advancements in cancer therapy, progress in RINV prevention and management remains slow.

Purpose of the Study:

To summarize major guidelines for RINV prevention, analyzing their structure, recommendations, and evidence base.
To examine current challenges and controversies in RINV clinical management and research.
To propose solutions for enhancing patient care in RINV.

Main Methods:

Review and synthesis of existing major RINV prevention guidelines.
Analysis of current clinical management and research challenges.
Identification of potential solutions and future directions.

Main Results:

Summary of current RINV prevention guidelines, highlighting their strengths and weaknesses.
Identification of key challenges, including slow research progress and clinical controversies.
Discussion of potential strategies to improve RINV management.

Conclusions:

There is a need for accelerated progress in RINV research and clinical practice.
Addressing current challenges can lead to improved symptom control and patient quality of life.
Implementing proposed solutions can enhance the overall care for patients experiencing RINV.