Lactulose Breath Test

How do I prepare for this test?

To ensure accurate test results and that your exam will not need to be repeated, please remember:

• Do not have anything to eat 12 hours before you exam;
• You may only have water before the test;
• Avoid slowly digesting foods (Beans and other vegetables) the day before the test;
• DO NOT smoke, sleep, or exercise vigorously for at least ½ hour before or at any time during the test;
• Be sure the medical staff is aware of any recent antibiotic therapy since it can affect the test.

What should I expect during my exam?

First, we will take a baseline breath sample.  Then you will administer the challenge dose of lactulose according to the following protocol:

1. 10-13 gm lactulose in 6-8 oz of water for adults
2. 0.5g/kg body weight up to 10g total for children
3. Collect breath samples every 20 minutes up to 180 minutes. (Baseline, 20min, 40min, 60min, 80min, 100min, 120min, 140min, 160min, 180min)

Please allow 2 to 3 ½ hours for the test.

What happens after the procedure?

Results will not be available before 10 to 14 working days after your test.