L-Lysine Ingredients & Drug Interactions
by DaVinci Laboratories Of Vermont
What is this page for?
First and foremost: checking L-Lysine against your medications. The heart of this page is the interaction checker and the full interaction report — how this product’s ingredients may interact with prescription and over-the-counter medicines you may be taking.
Around that, we add a pharmacist’s high-level view of the product as a whole — what’s inside, the evidence for its stated use, how transparent the label is, and what safety data exists — so you can see the full picture in one place. It’s educational information from our licensed clinical databases and the clinical staff at HelloPharmacist — not medical advice — and we don’t sell or endorse products. Our editorial policy
L-Lysine is a dietary supplement by DaVinci Laboratories Of Vermont with 1 active ingredient. Its ingredients are commonly taken for cold sores (herpes labialis), genital herpes outbreaks, supporting protein and collagen formation.Based on those ingredients, 1 medication has a known interaction with it, the most serious rated minor. The ingredients most likely to interact are L-Lysine. Use the checker below to test your specific medication, or read the full HelloPharmacist Interaction Report.
Check Your Meds Against L-Lysine by DaVinci Laboratories Of Vermont
Ask about any prescription or over-the-counter medication and we check it for interactions with L-Lysine by DaVinci Laboratories Of Vermont — and tell you which ingredient is responsible.
AI summaries are generated from our interaction database for education only — always confirm with your pharmacist. How we use AI
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HelloPharmacist Scorecard of L-Lysine by DaVinci Laboratories Of Vermont
Our pharmacy team’s full take, with four database checks built into the cards below — a summary of what is known, not a grade of the product itself.
What’s inside
Full disclosure
This product contains 1 active ingredient: L-Lysine, an amino acid your body uses to build proteins and support immune and tissue health. The tablet also includes inactive ingredients (stearic acid, vegetable stearate, croscarmellose sodium, and silica) that help hold it together and aid absorption.
Does it work?
Moderate evidence
L-Lysine is possibly effective for herpes labialis, commonly called cold sores. The evidence for child growth, pressure ulcers, and diabetic foot ulcers is insufficient — we don't have enough reliable data to rate how well it works for those purposes.
How safe is it?
Well-documented data
L-Lysine is generally well tolerated at typical doses. High amounts may cause stomach upset, and long-term safety with supplements hasn't been thoroughly studied.
The most common side effects reported orally are abdominal pain, diarrhea, and dyspepsia (indigestion). There is one case report of kidney inflammation linked to high-dose oral lysine, though this is rare.
Supplement safety in pregnancy hasn't been well studied — talk with your doctor before taking it if you're pregnant. There isn't enough reliable information on supplement use while breastfeeding, so caution is advised; discuss it with your doctor or pharmacist.
Meds to double-check
Minor interactions only
If you take a 5-HT4 agonist, confirm with your pharmacist that L-Lysine won't interfere with how your medication works. For the single ingredient we checked, that's the only documented interaction in our data.
The bottom line
Scorecard at a glanceFully disclosed formula with some supporting evidence behind its ingredients' uses. Only minor medication interactions are documented, and safety information is well characterized.
L-Lysine may help with cold sores if the evidence supports that use for you. It's generally well tolerated, but high doses can upset your stomach, and we don't have long-term safety data for supplements.
If you're pregnant or breastfeeding, or if you take a 5-HT4 agonist, check with your doctor or pharmacist before starting it.
Educational only — not medical advice; always confirm with your pharmacist. Our editorial policy · How we use AI
Assessment coverage: 1 of 1 active ingredient matched to our full ingredient reviews (monographs). Based on the product label dated Jun 25, 2013.
This Scorecard evaluates available label information, ingredient evidence, and known medication-safety considerations. It does not independently verify product identity, purity, potency, contamination, or manufacturing quality. How these ratings are computed
General information
Key facts about L-Lysine, straight from the product label.
| Brand | DaVinci Laboratories Of Vermont |
|---|---|
| Barcode (UPC) | 026664228116 |
| Net contents | 100 Tablet(s); 500 mg |
| Market status | On market |
| Date entered into DSLD | Jun 25, 2013 |
| DSLD ID | 22874 |
| Product type | Amino Acid/protein |
| Supplement form | Tablet Or Pill |
| Dietary claims / uses | All Other, Structure/Function |
| Intended target group(s) | Vegetarian, Adult (18 - 50 Years), Gluten Free |
Everything in this section is reproduced from the manufacturer’s own product label — it’s the label speaking, not HelloPharmacist. We show it so you can see exactly what the maker states; we don’t verify or endorse those statements.
Supplement Facts
The label details for L-Lysine by DaVinci Laboratories Of Vermont, sourced from the NIH Dietary Supplement Label Database.
Supplement Facts
| Ingredient | Amount | % DV |
|---|---|---|
| L-Lysine | 500 mg | -- |
Other ingredients: Stearic Acid, Vegetable Stearate, Croscarmellose Sodium, Silica
Tap any ingredient to jump to its full detail below.
These statements are the manufacturer’s wording, reproduced from the product label — the label is saying it, not HelloPharmacist. We don’t verify or endorse them.
Suggested/Recommended/Usage/Directions
Suggested Use: As a dietary supplement, take 1 tablet, 1 to 3 times daily between meals, or as directed by your health care practitioner.
General Statements
TRUTH We pledge total truth in labeling. Our family of products contain only the purest and most potent ingredients. Guaranteed.
Color of this product may vary due to color variations of natural ingredients.
9768500 1012
Formulation
This product is vegetarian and free of citrus, corn, gluten, rice and yeast.
This product is vegetarian and free of citrus, corn, gluten, rice and yeast.
VEGETARIAN
Precautions
Warning: If pregnant or nursing, consult your health care practitioner before taking this product.
Keep out of reach of children.
Storage
Store in a cool, dry place.
FDA Disclaimer Statement
This statement has not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure or prevent any disease.
General
0200281.100 0310A
FDA Statement of Identity
A Dietary Supplement to Support the Body's Antibody, Hormone and Enzyme Functions*
Is this label outdated? Report a formula or label change and our pharmacy team will review it.
L-Lysine by DaVinci Laboratories Of Vermont label
The label scan from the NIH Dietary Supplement Label Database. Tap to enlarge.
Label images are published by the NIH Dietary Supplement Label Database for the version of this product on file. Always read your actual product label.
View the full label (PDF)The Ingredients in L-Lysine by DaVinci Laboratories Of Vermont
This is the 1 active ingredient this product is made of. Select it to open its full monograph.
Serving size1 Tablet(s) Dosage formTablet Or Pill Servings per container100 Amounts shown are per serving.
L-Lysine
Interacts with1 drug
Lysine is an essential amino acid your body cannot make on its own, so it must come from food or supplements. People most often take extra lysine to t...
L-Lysine monograph & interactionsOther (inactive) ingredients: Stearic Acid, Vegetable Stearate, Croscarmellose Sodium, Silica. These complete the product’s ingredient list but are not active constituents.
L-Lysine by DaVinci Laboratories Of Vermont Drug Interactions
HelloPharmacist Interaction Report
L-Lysine by DaVinci Laboratories of Vermont has one documented interaction in our data: it may reduce the effects of 5-HT4 agonists (a type of medication sometimes used for GI motility).
The interaction is Minor in severity, based on animal research suggesting lysine acts as a partial serotonin receptor 4 antagonist.
Read the full breakdown — every affected drug type, severity by severity
Altogether, these interactions span 1 individual medication.
If you take a 5-HT4 agonist, run it through the medication checker on this page before you start L-Lysine. We could not check several inactive ingredients (stearic acid, vegetable stearate, croscarmellose sodium, and silica) because we don't hold interaction data for those excipients — that doesn't mean they interact, just that we haven't screened them.
Check your own medications below · Editorial policy · How we use AI
Want to check YOUR meds against L-Lysine?
Ask about interactions with your drugs in plain English — “Can I take it with lisinopril?” — and we find you the answer in seconds, ingredient by ingredient.
Go to the checkerIngredients driving the most interactions
Individual Drug Interactions
The ingredients in L-Lysine interact with 1 drug. Click any drug to see the details.
1 of the 1 ingredient in L-Lysine interact with drugs. Each result below shows which ingredient is responsible. L-Lysine
TegaserodZelnorm
How Tegaserod interacts with L-Lysine — through 1 ingredient. Tap an ingredient for the detail:
L-lysine5-ht4 Agonists Minor
Interaction Summary
Theoretically, lysine may reduce the effects of 5-HT4 agonists.
Read the full L-lysine + Tegaserod interactionEach ingredient & the kinds of drugs it affects
For each ingredient in L-Lysine with known interactions, here are the types of medications it can affect. Open any type for the detail — or search your exact drug in the checker above.
L-Lysine
5-Ht4 Agonists
Theoretically, lysine may reduce the effects of 5-HT4 agonists.
Animal research suggests that L-lysine is a partial serotonin receptor 4 (5-HT4) antagonist and inhibits diarrhea induced by the 5-HT4 agonist, 5-hydroxytryptophane.
Brand information
Manufacturer and brand details for L-Lysine, from the product label.
DaVinci Laboratories Of Vermont
See all DaVinci Laboratories Of Vermont products- Name
- DaVinci Laboratories of Vermont a division of FoodScience Corp.
- Street Address
- 20 New England Drive, Suite 10
- City
- Essex Junction
- State
- VT
- ZipCode
- 05452
- Web Address
- www.davincilabs.com
L-Lysine by DaVinci Laboratories Of Vermont: Common Questions
Does L-Lysine by DaVinci Laboratories Of Vermont interact with any medications?
How can one product interact with so many drugs?
Where does this information come from?
Does L-Lysine actually work for cold sores?
What are the most common side effects?
Is it safe to take L-Lysine while pregnant?
Can I take L-Lysine if I'm breastfeeding?
What does L-Lysine actually do in the body?
Written and reviewed by the HelloPharmacist editorial staff. Our editorial policy
Not sure if L-Lysine is safe with your meds?
Our pharmacists answer your medication & supplement questions — free.
Label information is sourced from the NIH Dietary Supplement Label Database and reflects the product version on file; always read your actual product label. This page is for education only and is not a substitute for professional medical advice. Confirm with your pharmacist or doctor before combining supplements and medications.
The Full Monographs Behind L-Lysine’s Ingredients
Every ingredient we hold a full HelloPharmacist monograph for — uses, evidence, safety, and the complete interaction list.
Sources & How We Checked
L-Lysine's label data comes from the NIH Dietary Supplement Label Database; the ingredient interaction data is from the Natural Medicines database, reviewed by our pharmacists.
- NIH Dietary Supplement Label Database (DSLD) — The official product label on file for this supplement.
- Natural Medicines (Therapeutic Research Center) — Evidence-graded clinical reference behind the ingredient interaction data.
Content is written and reviewed by licensed HelloPharmacist pharmacists. See our data sources and editorial standards for how this information is built and checked.
The 7 references behind this product’s interaction data
Every citation that drives the interaction findings for this product’s ingredients, from the evidence-graded Natural Medicines (TRC Healthcare) database. Open an ingredient to browse its citations — links open the study on PubMed or the publisher’s site.
Lysine 7 references
- Thein DJ, Hurt WC. Lysine as a prophylactic agent in the treatment of recurrent herpes simplex labialis. Oral Surg Oral Med Oral Pathol 1984;58:659-66. PubMed
- McCune MA, Perry HO, Muller SA, O'Fallon WM. Treatment of recurrent herpes simplex infections with L-lysine monohydrochloride. Cutis 1984;34:366-73.
- DiGiovanna JJ, Blank H. Failure of lysine in frequently recurrent herpes simplex infection. Treatment and prophylaxis. Arch Dermatol 1984;120:48-51. DOI
- Milman N, Scheibel J, Jessen O. Lysine prophylaxis in recurrent herpes simplex labialis: a double-blind, controlled crossover study. Acta Derm Venereol 1980;60:85-7.
- Griffith RS, Walsh DE, Myrmel KH, et al. Success of L-lysine therapy in frequently recurrent herpes simplex infection. Treatment and prophylaxis. Dermatologica 1987;175:183-90. DOI
- Lo JC, Chertow GM, Rennke H, Seifter JL. Fanconi's syndrome and tubulointerstitial nephritis in association with L-lysine ingestion. Am J Kidney Dis 1996;28:614-7. PubMed
- Smriga M, Torii K. L-Lysine acts like a partial serotonin receptor 4 antagonist and inhibits serotonin-mediated intestinal pathologies and anxiety in rats. Proc Natl Acad Sci U S A. 2003 Dec 23;100(26):15370-5.
Parts of this content are provided by the Therapeutic Research Center, LLC.
DISCLAIMER: Currently this does not check for drug-drug interactions. This is not an all-inclusive comprehensive list of potential interactions and is for informational purposes only. Not all interactions are known or well-reported in the scientific literature, and new interactions are continually being reported. Input is needed from a qualified healthcare provider including a pharmacist before starting any therapy. Application of clinical judgment is necessary.
© 2021 Therapeutic Research Center, LLC