How you prepare

There are no preparations for either a standard CRP test or an hs-CRP test. However, if your blood is being drawn for other tests, as well, you might need to fast or follow other instructions. Ask your doctor if you're having other tests at the same time.

Some medications can affect your CRP level. Tell your doctor about the medications you take.

Nov. 21, 2017
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  2. Filippo C, et al. C-reactive protein in cardiovascular disease. Accessed Oct. 16, 2017.
  3. Morrow DA. Screening for cardiovascular disease with C-reactive protein. Accessed Oct. 16, 2017.
  4. WHO guidelines on drawing blood: Best practices in phlebotomy. World Health Organization. Accessed Oct. 16, 2017.
  5. Fischbach FT, et al. Immunodiagnostic studies. In: A Manual of Laboratory and Diagnostic Tests. 9th ed. Philadelphia, Pa.: Lippincott Williams & Wilkins; 2014.
  6. C-reactive protein, high sensitivity, serum. Mayo Medical Laboratories. Accessed Nov. 16, 2017.