Renin Assay: How To Prepare
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How To Prepare
For 2 to 4 weeks before the test, you may be asked to stop taking medicines that can affect the test, such as diuretics, estrogens, and high blood pressure medicines (especially beta-blockers and ACE inhibitors). Your health professional may have you take other medicines for a few weeks that will not change the renin test results.
Do not eat natural black licorice for 2 weeks before the test. Do not eat or drink foods that contain caffeine the day before the test. Natural licorice and caffeine can change the test results.
For 3 days before a renin test, you may be asked to follow a special low-sodium diet.
You may be asked to not eat or drink anything for 8 hours before the test.
| Last updated: | August 14, 2008 |
|---|---|
| Author: | Caroline Rea, RN, BS, MS |
| Reviewed By: | Caroline S. Rhoads, MD - Internal Medicine, Matthew I. Kim, MD - Endocrinology & Metabolism |
| Editors: | Maria Essig, Tracy Landauer |
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