How you prepare

By Mayo Clinic Staff

There are no special preparations for a CRP test. However, if your doctor is checking your CRP level to find out your heart attack risk, you may need other blood tests that would require you to fast or follow other instructions. Talk to your doctor to see if you'll need any additional blood tests that will be done at the same time as your CRP test.

Some medications — such as birth control pills; statins; nonsteroidal anti-inflammatory drugs (NSAIDs), including ibuprofen (Advil, Motrin, others); and acetaminophen (Tylenol, others) — can affect your CRP level. Tell your doctor if you take these medications regularly.

Aug. 16, 2013