You should not eat for 8 to 12 hours before the test.
Alcohol and certain drugs may affect test results. Make sure your doctor knows what medicines you take, including over-the-counter drugs and supplements. Your doctor may tell you to stop taking certain medicines for a little while. Never stop taking any medicine without first talking to your doctor.
Drugs that can increase triglyceride measurements include beta blockers, cholestyramine, colestipol, estrogens, protease inhibitors, retinoids, thiazide diuretics, certain antipsychotics, and birth control pills.
Drugs that can decrease triglyceride measurements include ascorbic acid, asparaginase, clofibrate, fish oil, and statin medications.