The day before the test, consume fewer items that take longer to digest, such as beans, bran, pasta, high-fiber bread, and high-fiber cereals. Prior to the test, you should fast for 12 hours while only drinking water. For at least 30 minutes prior to the test as well as throughout it, refrain from smoking, sleeping, or engaging in strenuous activity. On the morning of the exam, avoid using mouthwash, chewing gum, and eating any mints. Probiotics should be stopped two weeks before testing. You must reschedule if you received antibiotic therapy within 48 hours of the test. You might drink water before the test. You are not allowed to consume anything by mouth once the test has started. You'll be required to breathe into a little device. You will then ingest a lactulose solution. Some patients may get diarrhea or gastrointestinal pain from this medication. You will be asked to breathe again after a 90-minute interval during which you are permitted to leave the office. Then you'll wait another 30 minutes before you can breathe again.
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