L-lysine
Uses of L-lysine
The primary use of L-Lysine is related to managing cold sores caused by the Herpes Simplex Virus (HSV). It belongs to the group of dietary supplements.
Additionally, L-Lysine is also used for supporting collagen production, enhancing calcium absorption, and bolstering the immune system.
Side effects of L-lysine
Gastrointestinal discomfort
Stomach pain
Diarrhoea
Nausea
How L-lysine works
L-Lysine is an essential amino acid.
It functions by serving as a building block for protein synthesis, which is vital for growth, healing and maintenance of tissues in the body.
L-Lysine is particularly significant in the production of collagen, a key structural protein in skin, bones and connective tissues.
Additionally, L-Lysine may inhibit the replication of the Herpes simplex virus (HSV), potentially reducing the severity and duration of cold sores.
Certified content
Written By
Doctor of Medicine
Reviewed By
BMS, FMC, MD Resident
Expert Advice
Dosage Forms Available
- L-Lysine is available in various formulations for oral use such as tablets, capsules and also in the form of powder which can be mixed with water or juice.
- Topical formulations such as creams and ointments containing L-Lysine are also available for external application.
Age and Dose Restrictions
- This medicine is primarily meant for adults.
- However, it may be used in children above 2 years of age under medical supervision and direction.
Contraindications
- L-Lysine is contraindicated in patients with a known hypersensitivity or allergy to lysine.
- It is also contraindicated in individuals diagnosed with a condition called hyperlysinemia (a rare genetic disorder that affects lysine metabolism).
Other Medications to Avoid
- This medicine may interact with aminoglycosides (such as gentamicin, neomycin) and has the potential to increase the risk of nephrotoxicity and ototoxicity.
- Before starting any prescription or over-the-counter medications, it is crucial to consult a doctor, as using antibiotics with L-Lysine may not be recommended.
Overdose and Missed Dose
- An overdose of L-Lysine may result in gastrointestinal symptoms like nausea, vomiting, diarrhoea, or abdominal pain. If you observe these symptoms, consult your doctor immediately.
- If you miss a scheduled dose of this medicine, take it as soon as you remember. But avoid doubling up on the dose to compensate for the missed one.
Management of Side Effects
Most side effects are temporary and generally harmless and resolve when discontinuing this medicine. However, if you experience any severe side effects or worsening of any of the symptoms, please consult your doctor.
- If you experience stomach discomfort after taking this medicine, try taking it along with meals.
- Drinking plenty of water can help manage side effects such as dry mouth or dehydration.
Use in Driving and Operating Machinery
- This medicine does not usually affect your ability to drive or operate heavy machinery. However, if you experience any dizziness or lethargy after taking L-Lysine, avoid driving or operating machinery.
Use in Pregnancy and Lactation
- Consult your doctor before using L-Lysine in pregnancy and breastfeeding as there is insufficient data on its safety during these conditions.
Caution in Other Conditions
- Patients with kidney disease should exercise caution when taking L-Lysine as excessive intake may lead to increased calcium absorption and potential for kidney stone formation.
- It is also advised to use caution in individuals with cardiovascular disorders due to the possibility of increasing cholesterol and triglyceride levels.
Special Dietary and Lifestyle Recommendations
- Consuming a diet rich in lysine such as lean meats, poultry, fish, dairy products, and certain fruits and vegetables can help fulfil lysine requirement.
- Regular monitoring of dietary intake is recommended when taking L-Lysine supplement to ensure balanced nutrition.
- Regular check-ups with your doctor can help monitor the effectiveness of the medication and make necessary adjustments.
Frequently asked questions
Is L-Lysine a steroid?
No, L-Lysine is not a steroid. It is an essential amino acid, which means it is a building block of protein that our body cannot produce on its own.
Does L-Lysine have any effect on sleep?
There are no specific studies linking L-Lysine directly with sleep regulation or improvement. As an essential amino acid, it plays several roles in the body, but its impact on sleep requires further research.
Will L-Lysine affect fertility?
Currently, there is no scientific evidence to suggest that L-Lysine affects fertility in men or women. However, if you have any concerns about this, you should discuss them with your doctor.
Are there any particular diet restrictions while taking L-Lysine?
No particular diet restrictions are mentioned in relation to taking L-Lysine. However, it is always wise to maintain a balanced and healthy diet while taking any medicine or dietary supplement.
Is it safe to take L-Lysine daily?
Yes, it is generally considered safe to take L-Lysine daily within the recommended doses. However, you should always consult your doctor before starting any new medication or dietary supplement.
How much time does L-Lysine take to work?
The time frame for L-Lysine's effects can vary depending on the individual and the condition being managed. For example, some studies suggest that regular supplementation may reduce the frequency and severity of cold sore outbreaks over time.
What is the best time to take L-Lysine?
There are no specific guidelines on the best time to take L-Lysine. It can be taken at any time of the day that suits you, as long as you're consistent in your routine.
L-lysine in other salts
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