Lysine, or l-lysine, is an amino acid that can be used in the treatment of cold sores due to herpes simplex.


Dosage Strength

  • 1 – 3ml’s IV, 1 – 2ml’s IM


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Lysine is one of the nine essential amino acids in the human body, which act as the building blocks of protein. Lysine is necessary to healthy growth and plays an essential role in the production of carnitine, which is critical to a number of processes in the human body, including healthy heart and brain function. Since the body cannot synthesize lysine, adequate levels of the amino acid must be obtained from dietary sources and supplementation. Our body’s main source of lysine is a well-balanced diet. Good dietary sources of lysine are high-protein foods such as eggs, meat (specifically red meat, lamb, pork, and poultry), soy, beans and peas, cheese (particularly Parmesan), and certain fish (such as cod and sardines).

Lysine is often sold as an herbal supplement. Lysine may be used to improve athletic performance, reduce symptoms of diabetes, prevent the growth and spread of the herpes virus, and more. Lysine is taken orally, topically, or intravenously. According to Wikipedia, there has been a long discussion that lysine, when administered intravenously or orally, can significantly increase the release of growth hormones. This has led to athletes using lysine as a means of promoting muscle growth while training. L-lysine also helps the body to absorb calcium. Because of this, it is also used in the treatment of osteoporosis.

What Is Lysine Prescribed For?

Lysine may be effective in the treatment of cold sores due to the herpes simplex virus.

Other Uses

Some research has indicated that l-lysine may be effective for the treatment of osteoporosis, diabetes, stress, and for athletic performance improvement. Lysine is a precursor of carnitine. It may also help the body absorb calcium and form collagen.

Dosage, Concentration, Route of Administration

Dosage: 1 – 3ml’s IV, 1 – 2ml’s IM

Concentration: 100mg/ml

Route of administration: IV, IM

Precautions/Side Effects

L-lysine is contraindicated in patients with renal (kidney) or hepatic (liver) disease. It should also be avoided by those already with too much lysine in the blood or urine. As lysine is still a drug under active study, those who are pregnant or breastfeeding should also avoid taking supplemental lysine until there is further research done regarding its safety for infants and children.

Do not start or stop taking lysine without talking to a physician. Calcium supplements should not be taken along with lysine due to the increased absorption and reduced elimination of calcium.

Some common side effects include:

  • – Diarrhea
  • – Abdominal pain
  • – Chronic renal (kidney) failure
  • – Interstitial nephritis (inflammation in the kidney)
  • – Increased calcium absorption


Store at controlled room temperature. Protect from light.


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