IMPORTANT SAFETY INFORMATION The Obalon Balloon System is intended for adults with a body mass index (BMI) of 30 to 40 kg/m2 willing to follow a diet and exercise program. All Obalon balloons must be removed in 6 months. Patients with prior weight loss surgeries are not eligible. The most common side effects reported were mild abdominal pain and nausea which typically resolved within two weeks. You must take daily acid-blocking medicine prescribed by your doctor. For full Important Safety Information click on Safety Information and Patient Labeling.