What Affects the Test
Reasons you may not be able to have the test or why the results may not be helpful include:
- Severe constipation.
- Eating a high-protein or a low-protein diet.
- Using medicines that increase blood ammonia levels, such as some Reference diuretics Opens New Window (such as furosemide), acetazolamide, and valproate.
- Using medicines that decrease ammonia levels, such as neomycin, tetracycline, diphenhydramine, isocarboxazid, phenelzine, and tranylcypromine, and lactulose.
- Strenuous exercise just before the test.
|By:||Reference Healthwise Staff||Last Revised: Reference November 4, 2011|
|Medical Review:||Reference E. Gregory Thompson, MD - Internal Medicine
Reference Jerome B. Simon, MD, FRCPC, FACP - Gastroenterology