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.
Therefore, avoid drinking coffee during the fasting period, especially if you are expecting a very accurate blood test result that is important if you are suspected from a heart disease or cardiovascular issue. Having high triglycerides level also makes coffee absence for 9 to 12 hours before the test significant.