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:	Caroline Rea, RN, BS, MS	Last Updated: December 23, 2008
Medical Review:	Anne C. Poinier, MD - Internal Medicine Brian Leber, MDCM, FRCPC - Hematology
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