If your physician has. Webprepare for your lab test by finding out if you need to fast before bloodwork, which foods to avoid, and if you can drink water the night before a test. • if you are asked to fast for your test:

—do not eat or drink anything (except water) for 8 hours before you go to the laboratory to have your blood drawn. The patient should remain seated throughout the test. Some tests require special preparation. Avoid any food or drinks, alcohol, smoking, chewing gum, exercising, and some supplements and medications for. • do not eat or drink anything (except water) for 8 hours before you go to the laboratory to have your blood drawn. Webif you are asked to fast for your test: Webjul 29, 2024 · what are the rules for fasting for a blood test?

• do not eat or drink anything (except water) for 8 hours before you go to the laboratory to have your blood drawn. Webif you are asked to fast for your test: Webjul 29, 2024 · what are the rules for fasting for a blood test?