L-Lysine 1,000 mg Ingredients & Drug Interactions
What is this page for?
First and foremost: checking L-Lysine 1,000 mg 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 1,000 mg is a dietary supplement by Woodstock Vitamins 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 1,000 mg by Woodstock Vitamins
Ask about any prescription or over-the-counter medication and we check it for interactions with L-Lysine 1,000 mg by Woodstock Vitamins — 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 1,000 mg by Woodstock Vitamins
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
L-Lysine 1,000 mg by Woodstock Vitamins contains one active ingredient: L-lysine, an amino acid your body uses for protein synthesis and immune function. The tablet also includes cellulose, calcium stearate, silica, and glycerin as inactive ingredients—the standard binders and fillers that hold the tablet together.
Does it work?
Moderate evidence
L-Lysine is possibly effective for cold sores (herpes labialis)—the evidence supports its use for managing outbreaks or reducing their severity. For child growth, pressure ulcers, and diabetic foot ulcers, the evidence is too thin right now to say one way or the other.
If you're taking it for cold sores, there's a reasonable case to be made; for other uses, talk with your doctor about whether the data supports it for your situation.
How safe is it?
Well-documented data
L-Lysine is generally well tolerated at typical doses, though high amounts may cause stomach upset, diarrhea, abdominal pain, and indigestion. Long-term safety hasn't been well studied.
There's not enough reliable data to know whether lysine supplements are safe in pregnancy or while breastfeeding—food sources are fine, but if you're considering the supplement, check with your doctor first. One rare case of kidney inflammation linked to oral lysine has been reported, though it's extremely uncommon.
Meds to double-check
Minor interactions only
If you take a 5-HT4 agonist medication, check with your doctor or pharmacist before adding L-Lysine—animal research suggests it may reduce how well these drugs work. No other medication interactions are documented for the ingredients we could check.
The bottom line
Scorecard at a glanceFully disclosed formula with some supporting evidence for its stated purpose. Only minor medication interactions are documented, and safety information is well characterized.
L-Lysine is a reasonable choice if you're dealing with cold sores and want an evidence-based supplement. If you're pregnant, breastfeeding, or taking a 5-HT4 agonist medication, talk with your doctor or pharmacist before starting.
High doses may upset your stomach, so stick to the recommended amount.
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 May 19, 2022.
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 1,000 mg, straight from the product label.
| Brand | Woodstock Vitamins |
|---|---|
| Net contents | 120 Vegan Tablet(s) |
| Market status | On market |
| Date entered into DSLD | May 19, 2022 |
| DSLD ID | 263068 |
| Product type | Amino Acid/protein |
| Supplement form | Tablet Or Pill |
| Dietary claims / uses | Nutrient, All Other, Structure/Function |
| Intended target group(s) | Adult (18 - 50 Years), Gluten Free, Dairy 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 1,000 mg by Woodstock Vitamins, sourced from the NIH Dietary Supplement Label Database.
Supplement Facts
| Ingredient | Amount | % DV |
|---|---|---|
| L-Lysine | 1000 mg | -- |
Other ingredients: Cellulose, Calcium Stearate, Silica, Glycerin
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: Take one tablet daily with food.
This high potency, one per day formula also helps support immune health and calcium absorption.
Formula
Healthy skin and immune health For healthier skin lysine can offer the support you need. Lysine, one of the nine essential amino acids, plays a vital role in the creation of hormones, enzymes and proteins in the body, including collagen which is a key factor for supporting skin health. This high potency, one per day formula also helps support immune health and calcium absorption.
Formulation
Contains no artificial colors, flavors or preservatives; no wheat, gluten, milk, eggs, peanuts, tree nuts, soy, crustacean shellfish or fish.
We guarantee our supplements for potency and purity
Double strength Free form Supports healthy skin tissue Supports immune function
GF Gluten free
Storage
Store in a cool, dry place.
Precautions
To report a serious adverse event, call 1-888-710-0006
Keep out of reach of children.
FDA Disclaimer Statement
These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease.
FDA Statement of Identity
Dietary Supplement
Is this label outdated? Report a formula or label change and our pharmacy team will review it.
L-Lysine 1,000 mg by Woodstock Vitamins 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 1,000 mg by Woodstock Vitamins
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 container120 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: Cellulose, Calcium Stearate, Silica, Glycerin. These complete the product’s ingredient list but are not active constituents.
L-Lysine 1,000 mg by Woodstock Vitamins Drug Interactions
HelloPharmacist Interaction Report
L-Lysine 1,000 mg by Woodstock Vitamins interacts with one medication type: 5-HT4 agonists, a class of drugs used mainly for gastrointestinal motility.
Animal research suggests lysine may work as a partial antagonist to serotonin receptor 4 (5-HT4) and could reduce the effects of these medications—theoretically making them less effective at their job. Altogether, these interactions span 1 individual medication.
Read the full breakdown — every affected drug type, severity by severity
The interaction is rated Minor, meaning the effect is unlikely to be severe, but it's worth a conversation with your doctor or pharmacist if you take a 5-HT4 agonist. Most of the evidence here comes from animal studies, so the real-world impact in humans isn't fully established.
Use the medication checker on this page to search your exact drugs, or talk it over with your pharmacist before you start.
Check your own medications below · Editorial policy · How we use AI
Want to check YOUR meds against L-Lysine 1,000 mg?
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 1,000 mg interact with 1 drug. Click any drug to see the details.
1 of the 1 ingredient in L-Lysine 1,000 mg interact with drugs. Each result below shows which ingredient is responsible. L-Lysine
TegaserodZelnorm
How Tegaserod interacts with L-Lysine 1,000 mg — 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 1,000 mg 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 1,000 mg, from the product label.
Woodstock Vitamins
See all Woodstock Vitamins products- Name
- Village Vitality LLC
- City
- Woodstock
- State
- NY
- ZipCode
- 12498
- Web Address
- woodstockvitamins.com
L-Lysine 1,000 mg by Woodstock Vitamins: Common Questions
Does L-Lysine 1,000 mg by Woodstock Vitamins 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?
Can I take this if I'm pregnant?
What side effects should I watch for?
Is L-Lysine safe long-term?
Can I take this while breastfeeding?
Written and reviewed by the HelloPharmacist editorial staff. Our editorial policy
Not sure if L-Lysine 1,000 mg 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 1,000 mg’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 1,000 mg'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