Treatment-Resistant Nausea and Vomiting: A Challenge in Clinical Practice

Treatment-resistant nausea and vomiting pose a major challenge in the clinical setting. Traditional pharmacological interventions are often ineffective, so more investigations are required. The medical literature suggests that suppression of the hypothalamic-pituitary-adrenal (HPA) axis by glucocorticoids, such as dexamethasone, can contribute significantly to treatment-resistant nausea and vomiting. This phenomenon is complex and involves several key mechanisms. Glucocorticoids can cause suppression of the HPA axis, resulting in decreased cortisol levels, which can impair the body's stress response and exacerbate symptoms of nausea and vomiting. Cortisol suppression can disrupt the balance of neuroendocrine signals that regulate nausea, potentially leading to anticipatory nausea in patients.