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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.


Trade Name(s)

  • egg lecithin
  • soy lecithin

Ther. Class.
lipid-lowering agents
anti-Alzheimers's agents
performance enhancers

Common Uses

  • Hepatic steatosis.
  • Alzheimer's dementia.
  • Hypercholesterolemia.
  • Tardive dyskinesia.
  • Mania.
  • Improving athletic performance.


Lecithin is a phospholipid found in egg yolks, organ meats, nuts, and spinach. It contains phosphatidylcholine, which contains choline which is a precursor to acetylcholine. Lecithin also increases omega-6 fatty acid levels.

Therapeutic Effect(s):

  • Decreased cholesterol levels.
  • As a source of choline, lecithin may improve symptoms of cholinergic diseases.


Absorption: Unknown

Distribution: Unknown

Metabolism and Excretion: Unknown

Half-life: Unknown




Contraindicated in:

  • Hypersensitivity.
  • Egg and soy allergy.

Use Cautiously in:

Pregnancy and lactation (when using amounts greater than found in foods).

Adverse Reactions/Side Effects

Derm: skin reactions (in soy and egg allergic patients)

GI: diarrhea, nausea, abdominal pain

* CAPITALS indicate life-threatening.
Underline indicate most frequent.


Natural Drug Interaction





PO: (Adults) Hypercholesterolemia –20–30 g/day. Athletic performance –3.6 g twice daily. Tardive dyskinesia– 20–50 g/day. Mania– 10 mg three times daily.Dementia– 1.2–45 g/day.




  • Assess mental status and memory periodically during therapy.

Lab Test Considerations:

Monitor liver function tests prior to and periodically during therapy.

Potential Diagnoses


  • PO: Administer 1 to 3 times daily.

Patient/Family Teaching

  • Instruct patient to take lecithin as directed.
  • Advise female patient to notify health care professional if pregnancy is planned or suspected or if breastfeeding.

Evaluation/Desired Outcomes

  • Decrease in serum cholesterol.
  • Improvement in signs and symptoms of cholinergic diseases.
lecithin is a sample topic from the Davis's Drug Guide.

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Quiring, Courtney, et al. "Lecithin." Davis's Drug Guide, 16th ed., F.A. Davis Company, 2019. Emergency Central, emergency.unboundmedicine.com/emergency/view/Davis-Drug-Guide/109946/all/lecithin.
Quiring C, Sanoski CA, Vallerand AH. Lecithin. Davis's Drug Guide. 16th ed. F.A. Davis Company; 2019. https://emergency.unboundmedicine.com/emergency/view/Davis-Drug-Guide/109946/all/lecithin. Accessed April 25, 2019.
Quiring, C., Sanoski, C. A., & Vallerand, A. H. (2019). Lecithin. In Davis's Drug Guide. Available from https://emergency.unboundmedicine.com/emergency/view/Davis-Drug-Guide/109946/all/lecithin
Quiring C, Sanoski CA, Vallerand AH. Lecithin [Internet]. In: Davis's Drug Guide. F.A. Davis Company; 2019. [cited 2019 April 25]. Available from: https://emergency.unboundmedicine.com/emergency/view/Davis-Drug-Guide/109946/all/lecithin.
* Article titles in AMA citation format should be in sentence-case
TY - ELEC T1 - lecithin ID - 109946 A1 - Quiring,Courtney, AU - Sanoski,Cynthia A, AU - Vallerand,April Hazard, BT - Davis's Drug Guide UR - https://emergency.unboundmedicine.com/emergency/view/Davis-Drug-Guide/109946/all/lecithin PB - F.A. Davis Company ET - 16 DB - Emergency Central DP - Unbound Medicine ER -