United States Embassy Pristina Security Message for U.S. Citizens: Heightened Caution During Religio. Senator John McCainâs Remarks to the Assembly of Kosovo. Thank you, Mister Speaker, Mister Prime Minister, and dear friends for that kind reception and for the honor of addressing this Assembly.
If you drink black coffee, with no additives, you can still have fasting labs done. However, coffee will increase your blood pressure and affect some tests .... especially a CRP. Your paying for these tests. I would recommend no coffee 10-12 hours prior if your not sure. The best method is to call the laboratory.
Fasting means you do not eat or drink for a specified period of time. Typically you are allowed to drink only water during the fasting period. Tea and coffee contains caffeine, which can make your test results inaccurate. For fasting labs you might also be asked not to chew gum, smoke or even exercise. Exercise, like digestion, can effect your test results.