Swallowable Gastric Balloon
A swallowable gastric balloon is swallowed as a capsule, filled with fluid in the stomach and left in place for about four months to reduce portions without surgery or endoscopy.
Plain English
Patient-Friendly Explanation
A swallowable gastric balloon is a weight-loss device a patient swallows as a capsule about the size of a large vitamin pill. The capsule is attached to a thin tube; once it reaches the stomach it is filled with fluid through the tube, which is then removed, and the balloon stays in the stomach for about four months before the body passes it naturally. Because it takes up space, patients feel full sooner and eat smaller portions, with typical weight loss of around 10 per cent of body weight over the treatment period. No sedation, endoscopy or hospital stay is needed for placement, and the programme always includes dietitian support, because the balloon buys time for habits to change rather than solving the problem permanently.
Medical
Clinical Definition
The swallowable capsule intragastric balloon is a fluid-filled device delivered without endoscopy or sedation, most studied in systems that are ingested in a capsule, filled with 450 to 550 millilitres of fluid through an attached catheter, then released to reside in the stomach for approximately 16 weeks before degrading and being excreted; the placement visit typically takes 15 to 20 minutes in an outpatient setting. Reported mean total body weight loss is in the range of 10 to 15 per cent, with pivotal cohorts showing roughly 10 per cent weight loss at 16 weeks when combined with a structured behavioural programme, broadly comparable to endoscopically placed balloons although head-to-head data are limited. Contraindications resemble those for endoscopic balloons and include previous gastric or oesophageal surgery, large hiatal hernia, active peptic ulcer or gastrointestinal bleeding, inflammatory bowel disease, uncontrolled coagulopathy, pregnancy or breastfeeding, and known allergy to device components. Adverse effects include nausea and vomiting, mainly in the first week, abdominal discomfort and reflux, and, rarely, gastric ulceration, bowel obstruction from early deflation or device migration, and pancreatitis; patients must be able to recognise and report the warning symptoms that need urgent assessment. The device should not be used in patients unwilling or unable to follow dietary instructions and attend follow-up. It is best positioned as a bridge within a multidisciplinary weight-management programme, with dietitian-led nutrition, activity and behavioural support during the indwelling period, since weight regain after removal is common without sustained habit change, and it is not a substitute for metabolic surgery in patients who meet criteria for it.
Key Insight
Why It Matters
Patients who want a non-surgical option often value that placement needs no sedation and no hospital stay. We present it honestly as a four-month window for changing habits, because the weight that stays off is the weight lost alongside new routines.
Sources
Reviewed against standard medical references.
Medically reviewed by
Family Physician & Registered Acupuncturist, Accord Medical Clinic. MBBS (NUS), Graduate Diploma in Family Medicine (NUS), Graduate Diploma in Acupuncture (Singapore College of TCM).
Last reviewed: September 2026
This page is general health education, not medical advice. Whether any treatment is appropriate for you is a decision made in consultation after assessment.
