lysine

Pronunciation: LYE seen

What is the most important information I should know about lysine?

Multum emt

Lysine has not been approved by the FDA to treat any disease, and it should not be substituted for prescription medications.

Lysine has not been evaluated by the FDA for safety, effectiveness, or purity. All potential risks and/or advantages of this product may not be known. Additionally, there are no regulated manufacturing standards in place for these compounds. Some marketed herbal supplements have been found to be contaminated with toxic metals or other drugs. Herbal/health supplements should be purchased from a reliable source to minimize the risk of contamination.

What is lysine?

Lysine is an essential amino acid. Essential means that it is not produced by the body and therefore it must be taken in either by diet or by taking supplements. Lysine is found in foods such as yogurt, fish, cheese, brewer's yeast, wheat germ, pork, and other meats.

Lysine has been used to treat or prevent herpes infections (genital herpes and cold sores) and canker sores. It has also been used to treat symptoms of Bell's palsy, and to improve calcium use in the body.

Multum emt

Lysine has not been approved by the FDA to treat any disease, and it should not be substituted for prescription medications.

Lysine may also have uses other than those listed in this product guide.

What should I discuss with my healthcare provider before taking lysine?

Multum donot

Before taking lysine, talk to your doctor, pharmacist, herbalist, or other healthcare provider. You may not be able to use this product if you have liver or kidney disease, or certain other medical conditions or allergies.

Multum nopreg

Do not take lysine without telling your doctor if you are pregnant or could become pregnant. It is not known whether lysine will be harmful to an unborn baby.

Multum nobrfeed

Do not take lysine without telling your doctor if you are breast-feeding a baby. It is not known whether lysine will be harmful to a nursing infant.

How should I take lysine?

Lysine has not been evaluated by the FDA for safety, effectiveness, or purity. All potential risks and/or advantages of this product may not be known. Additionally, there are no regulated manufacturing standards in place for these compounds. Some marketed herbal supplements have been found to be contaminated with toxic metals or other drugs. Herbal/health supplements should be purchased from a reliable source to minimize the risk of contamination.

If you choose to take lysine, use it exactly as directed on the label, or as prescribed by your doctor, pharmacist, or other healthcare provider.

Store lysine at room temperature, away from heat, light, and moisture.

What happens if I miss a dose?

No information is available regarding a missed dose of lysine. Ask your doctor, pharmacist, or healthcare professional for instructions if you miss a dose.

What happens if I overdose?

Multum emt

An overdose of lysine is unlikely to threaten life. Call an emergency room or poison control center for advice if you think you have taken too much.

What should I avoid while taking lysine?

Do not give any herbal/health supplement to a child without a doctor's advice.

What are the possible side effects of lysine?

Multum emt

Stop taking lysine and seek emergency medical attention if you experience symptoms of a serious allergic reaction including difficulty breathing; closing of your throat; swelling of your lips, tongue, or face; or hives.

Side effects other than those listed here may also occur. Talk to your doctor, pharmacist, or healthcare provider about any unusual or bothersome side effect. You may report side effects to FDA at 1-800-FDA-1088.

What other drugs will affect lysine?

The following drugs may become toxic if you take them together with lysine. Tell your healthcare provider if you are using any of these:

  • gentamicin (Garamycin);
  • tobramycin (Nebcin, TOBI);
  • amikacin (Amikin);
  • kanamycin (Kantrex);
  • netilmicin (Netromycin);
  • neomycin (Mycifradin, Neo-Fradin, Neo-Tab);
  • netilmicin (Netromycin);
  • streptomycin; or
  • tobramycin (Nebcin, Tobi).

If you are using any of these drugs, you may not be able to take lysine, or you may need dosage adjustments or special tests during treatment.

This list is not complete and there may be other drugs that can interact with lysine. Tell your doctor about all your prescription and over-the-counter medications, vitamins, minerals, herbal products, and drugs prescribed by other doctors. Do not start a new medication without telling your doctor.

Where can I get more information?

Your doctor, pharmacist, herbalist, or healthcare provider can provide more information about lysine.


Remember, keep this and all other medicines out of the reach of children, never share your medicines with others, and use this medication only for the indication prescribed.

Every effort has been made to ensure that the information provided by Cerner Multum, Inc. ('Multum') is accurate, up-to-date, and complete, but no guarantee is made to that effect. Drug information contained herein may be time sensitive. Multum information has been compiled for use by healthcare practitioners and consumers in the United States and therefore Multum does not warrant that uses outside of the United States are appropriate, unless specifically indicated otherwise. Multum's drug information does not endorse drugs, diagnose patients or recommend therapy. Multum's drug information is an informational resource designed to assist licensed healthcare practitioners in caring for their patients and/or to serve consumers viewing this service as a supplement to, and not a substitute for, the expertise, skill, knowledge and judgment of healthcare practitioners. The absence of a warning for a given drug or drug combination in no way should be construed to indicate that the drug or drug combination is safe, effective or appropriate for any given patient. Multum does not assume any responsibility for any aspect of healthcare administered with the aid of information Multum provides. The information contained herein is not intended to cover all possible uses, directions, precautions, warnings, drug interactions, allergic reactions, or adverse effects. If you have questions about the drugs you are taking, check with your doctor, nurse or pharmacist.

Copyright 1996-2013 Cerner Multum, Inc. Version: 1.07. Revision date: 12/15/2010.

Your use of the content provided in this service indicates that you have read, understood and agree to the End-User License Agreement, which can be accessed by clicking on this link.

This information does not replace the advice of a doctor. Healthwise, Incorporated disclaims any warranty or liability for your use of this information. Your use of this information means that you agree to the Terms of Use. How this information was developed to help you make better health decisions.

Healthwise, Healthwise for every health decision, and the Healthwise logo are trademarks of Healthwise, Incorporated.