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By Mayo Clinic staffCertain foods and medications may affect the results of your liver function tests. Because of this, your doctor may tell you to fast for a period of time and avoid some medications before your blood is drawn. How much time you need to fast and what medications you avoid will depend on which liver function tests are being done. Your doctor will tell you what to avoid.
- Kaplan MM, et al. Approach to the patient with abnormal liver function tests. http://www.uptodate.com/home/index.html. Accessed July 2, 2010.
- Pratt DS. Liver chemistry and function tests. In: Feldman M, et al. Sleisenger and Fordtran's Gastrointestinal and Liver Disease. 9th ed. Philadelphia, Pa.: Saunders Elsevier; 2010. http://www.mdconsult.com/php/208033710-3/homepage. Accessed July 2, 2010.
- Common blood tests. National Heart, Lung, and Blood Institute. http://www.nhlbi.nih.gov/health/dci/Diseases/bdt/bdt_what.html. Accessed July 2, 2010.
- Laboratory reference values. Rochester, Minn.: Mayo Foundation for Medical Education and Research; July 1, 2010.
- PT and INR. Lab Tests Online. http://www.labtestsonline.org/understanding/analytes/pt/glance.html. Accessed July 6, 2010.
- Albumin. Lab Tests Online. http://www.labtestsonline.org/understanding/analytes/albumin/test.html#is. Accessed July 6, 2010.
- ALT. Lab Tests Online. http://www.labtestsonline.org/understanding/analytes/alt/glance.html. Accessed July 6, 2010.
- AST. Lab Tests Online. http://www.labtestsonline.org/understanding/analytes/ast/glance.html. Accessed July 6, 2010.
- ALP. Lab Tests Online. http://www.labtestsonline.org/understanding/analytes/alp/glance.html. Accessed July 6, 2010.
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