Folic Acid

What Affects the Test

Reasons you may not be able to have the test or why the results may not be helpful include:

• Taking some medicines, such as birth control pills, phenytoin (Dilantin), pyrimethamine (Daraprim), methotrexate, trimethoprim (Proloprim), pentamidine (Pentam 300), triamterene (Dyrenium), primidone (Mysoline), and phenobarbital.
• Using too much alcohol.
• Having conditions such as vitamin B12 anemia or iron deficiency anemia.

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Author:	Jan Nissl, RN, BS	Last Updated: April 20, 2007
Medical Review:	E. Gregory Thompson, MD - Internal Medicine Brian Leber, MDCM, FRCPC - Hematology
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