The Prophet Muhammad ﷺ said: "None of you should drink while standing; whoever forgets, let him vomit." (Narrated by Muslim, no. 2026, from Abu Hurairah). In another version, narrated by Anas ibn Malik, the Prophet ﷺ forbade a man from drinking while standing; when asked about eating while standing, he replied: "That is even worse." (Narrated by Muslim, no. 2024).
These hadiths recommend drinking while seated. Modern science, without definitively confirming a specific danger of the standing position, documents several physiological mechanisms that shed light on the wisdom of this recommendation.
The first mechanism is aerophagia, that is, the swallowing of air while drinking or eating. Drinking too quickly, especially while standing in an unstable position, promotes air swallowing. Aerophagia causes belching, bloating, and gastric distension, symptoms well documented by modern medicine (Cleveland Clinic, WebMD, Healthline).
The second mechanism links aerophagia to gastroesophageal reflux. Gastric distension induced by swallowed air can increase transient relaxations of the lower esophageal sphincter, thereby promoting reflux of gastric contents into the esophagus (gastroenterology studies).
The third mechanism concerns posture and swallowing. Physiological studies show that an upright seated position facilitates correct swallowing and smooth progression of the food bolus through the esophagus, whereas an unstable or reclined posture can disturb esophageal peristalsis.
Finally, the speed of ingestion plays a role: drinking while seated, calmly and in small sips, promotes gradual hydration and better digestive tolerance, unlike rapid ingestion while standing.
The convergence here is reasonable but must be nuanced: science does not definitively confirm that there is a specific and exclusive danger to the standing position. The prophetic guidance rather appears as a modern prevention, encouraging a more measured, more hygienic way of drinking that is more respectful of digestive physiology.
Note of caution: The physiological mechanisms mentioned (aerophagia, reflux, posture) are documented, but science does not formally demonstrate that they are specifically aggravated by the standing position alone. The wisdom of the hadith lies more in promoting measured, unhurried hydration than in asserting an absolute medical danger linked to standing.