flax seed

Complementary/Alternative Medicine: This monograph describes a natural or herbal product that is not subject to FDA guidelines for medicines. Patients and clinicians are advised to read package labels carefully to ensure safe and efficacious use.

REMS

Constipation.
Hypercholesterolemia.
Menopausal symptoms.
Systemic lupus erythematosus (SLE) nephritis.

Contraind./Precautions ⬆ ⬇

Contraindicated in:

Hypersensitivity;
Gastrointestinal obstruction.

Use Cautiously in:

Pregnancy and lactation;
Bleeding disorders;
Diabetes;
Hormone sensitive cancers/conditions.

Adv. Reactions/Side Effects ⬆ ⬇

Endo: hypoglycemia

GI: bloating, diarrhea, flatulence, nausea

Hemat: increased bleeding time

Misc: allergic reactions

Interactions ⬆ ⬇

Natural-Drug Products:

Increased risk of bleeding with anticoagulantsand antiplatelet agents.
May have additive blood sugar lowering effects with hypoglycemic agents.

Natural-Natural Products:

Increased risk of bleeding with herbs that have anticoagulant/antiplatelet properties including clovegarlicgingergingkoginseng and others.

Availability ⬆ ⬇

Oil: Whole or ground seeds

Route/Dosage ⬆ ⬇

Note: Flaxseed oil contains the alpha-linolenic acid component of flaxseed, not the fiber or lignan components. It may share the purported lipid-lowering properties of flaxseed but not the proposed laxative or anti-estrogenic properties.
PO (Adults ): Hypercholesterolemia: 40–50 grams/day. SLE nephritis: 15 grams twice daily. Mild menopausal symptoms: 40 grams/day.

US Brand Names ⬆ ⬇

Linum usitatissimum, linseed, phytoestrogen

Action ⬆ ⬇

Flaxseed contains alpha-linolenic acid which lowers serum cholesterol and reduces platelet aggregation. Ten grams of flaxseed contains 4 grams of dietary fiber which also helps lower cholesterol and increases fecal elimination of bile acids. Flaxseed is an indirect food source of lignans which alter estrogen metabolism to produce less active estrogen metabolites. Flaxseed improves renal function by decreasing blood viscosity, reducing serum cholesterol and reducing inflammatory response.

Therapeutic effects:

Reduced serum cholesterol.
Improved renal function.
Increased bowel movements.

Classifications ⬆ ⬇

Therapeutic Classification: laxatives, lipid-lowering agents

Pharmacokinetics ⬆ ⬇

Absorption: Unknown

Distribution: Unknown

Metabolism/Excretion: Unknown

Half-Life: Unknown

Time/Action Profile ⬆ ⬇

	ONSET	PEAK	DURATION
PO	unknown	unknown	unknown

Patient/Family Teaching ⬆ ⬇

Instruct patient to follow directions provided with product.
Encourage patients to use other forms of bowel regulation, such as increasing bulk in the diet, increasing fluid intake (6–8 full glasses/day), and increasing mobility. Normal bowel habits are variable and may vary from 3 times/day to 3 times/wk.
Advise patient that this medication should be used in conjunction with diet restrictions (fat, cholesterol, carbohydrates, alcohol), exercise, and cessation of smoking.
Advise patient not to use laxatives when abdominal pain, nausea, vomiting, or fever is present.
Instruct female patients to notify health care professional promptly if pregnancy is planned or suspected.

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Indications ⬇