Health Guide

Oat bran

What is it?

Oat Bran is a plant food that may be used for high cholesterol and high triglycerides (blood fats).

Other names for Oat Bran include: Avena farina, Common Oats, Groats, Haws, and Oatmeal.

Ask your doctor, nurse, or pharmacist if you need more information about this medicine or if any information in this leaflet concerns you.

Before Using:

Tell your doctor if you

  • are taking medicine or are allergic to any medicine (prescription or over-the-counter (OTC) or dietary supplement)
  • are pregnant or plan to become pregnant while using this medicine
  • are breastfeeding
  • have celiac disease
  • have any other health problems, such as high blood pressure or heart or blood vessel disease


Talk with your caregiver about how much Oat Bran you should take. The amount depends on the strength of the medicine and the reason you are taking Oat Bran. If you are using this medicine without instructions from your caregiver, follow the directions on the medicine bottle. Do not take more medicine or take it more often than the directions tell you to.

To store this medicine:

Keep all medicine locked up and away from children. Store medicine away from heat and direct light. Do not store your medicine in the bathroom, near the kitchen sink, or in other damp places. Heat or moisture may cause the medicine to break down and not work the way it should work. Throw away medicine that is out of date or that you do not need. Never share your medicine with others.

Drug and Food Interactions:

Do not take Oat Bran without talking to your doctor first if you are taking:

  • Medicine used to lower cholesterol (examples: atorvastatin (Lipitor(R)), lovastatin (Mevacor(R)), pravastatin (Pravachol(R)), simvastatin (Zocor(R)))


  • Before taking Oat Bran, tell your doctor if you are pregnant or breastfeeding
  • Oat Bran should be taken with large amounts of water (3)
  • Oat Bran may cause a problem for people who are sensitive to products that contain gluten (4)

Side Effects:

Stop taking your medicine right away and talk to your doctor if you have any of the following side effects. Your medicine may be causing these symptoms which may mean you are allergic to it.

  • Breathing problems or tightness in your throat or chest
  • Chest pain
  • Skin hives, rash, or itchy or swollen skin

Other Side Effects:

You may have the following side effects, but this medicine may also cause other side effects. Tell your doctor if you have side effects that you think are caused by this medicine.

  • Diarrhea (loose stools) and gas have been reported with the use of Oat Bran (5)
  • Skin rash has been reported from touching Oat Bran (oat flour) (3)


1. Anderson J, Story L, Sieling B et al: Hypocholesterolemic effects of oat-bran or bean intake for hypercholesterolemic men. Am J Clin Nutr 1984; 40:1146-1155.

2. Dubois C, Armand M, Senft M et al: Chronic oat bran intake alters postprandial lipemia and lipoproteins in healthy adults. Am J Clin Nutr 1995; 61:325-333.

3. Anon: Oats. In: DerMarderosian (ed): The Review of Natural Products. Facts and Comparisons, St Louis, MO; 1997.

4. Parnell N, Ellis H & Ciclitira P: Absence of toxicity of oats in patients with dermatitis herpetiformis. N Engl J Med 1998; 338:1470-1471.

5. Keenan J, Wenz J, Myers S et al: Randomized, controlled, crossover trial of oat bran in hypercholesterolemic subjects. J Fam Pract 1991; 33:600-608.

Last Updated: 7/4/2018
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