L-Ornithine 500 mg Ingredients & Drug Interactions
by Swanson
What is this page for?
First and foremost: checking L-Ornithine 500 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-Ornithine 500 mg is a dietary supplement by Swanson with 1 active ingredient. Its ingredients are commonly taken for athletic performance and recovery, reducing fatigue, sleep and stress support.We don’t currently list a known drug interaction for its mapped ingredients — but that doesn’t guarantee none exist, so always confirm with your pharmacist.
HelloPharmacist Scorecard of L-Ornithine 500 mg by Swanson
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 one active ingredient: L-Ornithine, an amino acid, at 500 mg per capsule. The capsule also contains inactive ingredients — hypromellose, microcrystalline cellulose, and magnesium stearate — which are standard binders and fillers.
Does it work?
Not established
L-Ornithine is possibly effective for athletic performance. The evidence for its use in dry skin, insomnia, and periodontitis (gum inflammation) is insufficient — we don't have enough reliable data to say whether it works for those purposes.
If you're considering it for one of those latter reasons, talk with your doctor or pharmacist about whether the current evidence supports a trial.
How safe is it?
Some data gaps
L-Ornithine is generally well tolerated in the short term, but long-term safety hasn't been well studied, so we don't know what happens if you take it for months or years. The safety data advises against use during pregnancy and while breastfeeding — there isn't enough information to know it's safe in those situations.
If you're pregnant, nursing, or planning to become pregnant, talk with your doctor or pharmacist before starting this supplement.
Meds to double-check
No known interactions
No interactions are documented for L-Ornithine in our data. This doesn't guarantee none exist, so if you take regular medications or other supplements, check them against the search tool on this page before you start.
The bottom line
Scorecard at a glanceFully disclosed formula with no established evidence rating for its marketed use. No medication interactions are currently documented, and some safety-information gaps remain.
This supplement may be worth trying if you're an athlete looking to support performance, since the evidence leans toward possibly effective. If you're considering it for dry skin, insomnia, or gum health, the evidence is too thin to say whether it'll help.
Because long-term safety isn't well studied, this is best used short-term and under the guidance of your doctor or pharmacist — especially if you're pregnant, nursing, or have other health concerns.
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 Mar 22, 2024.
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-Ornithine 500 mg, straight from the product label.
| Brand | Swanson |
|---|---|
| Barcode (UPC) | 087614112381 |
| Net contents | 60 Veggie Capsule(s) |
| Market status | On market |
| Date entered into DSLD | Mar 22, 2024 |
| DSLD ID | 308650 |
| Product type | Amino Acid/protein |
| Supplement form | Capsule |
| Dietary claims / uses | Nutrient, All Other, Structure/Function |
| Intended target group(s) | Vegetarian, Adult (18 - 50 Years) |
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-Ornithine 500 mg by Swanson, sourced from the NIH Dietary Supplement Label Database.
Supplement Facts
| Ingredient | Amount | % DV |
|---|---|---|
| L-Ornithine | 500 mg | -- |
Other ingredients: Hypromellose, Microcrystalline Cellulose, Magnesium Stearate
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.
Formulation
Supports a healthy stress response Helps eliminate excess nitrogen Arginine precursor
Vegetarian
Stress Support Free form
General Statements
Science-backed quality since 1969
Suggested/Recommended/Usage/Directions
Suggested use: As a dietary supplement, take one veggie capsule two times per day with water between meals.
Seals/Symbols
Vegetarian
Precautions
Warning: For adults only.
Consult your healthcare provider before using this or any product if you are pregnant or nursing, taking medication or have a medical condition.
Keep out of reach of children.
Do not use if seal is broken.
Storage
Store in a cool, dry place.
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.
Formula
L-Ornithine 500 mg per capsule
FDA Statement of Identity
Dietary Supplement
Is this label outdated? Report a formula or label change and our pharmacy team will review it.
L-Ornithine 500 mg by Swanson 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-Ornithine 500 mg by Swanson
This is the 1 active ingredient this product is made of. Select it to open its full monograph.
Serving size1 Veggie Capsule(s) Dosage formCapsule Servings per container30 Amounts shown are per serving.
L-Ornithine
No knowninteractions
Ornithine is a non-essential amino acid your body makes naturally as part of the urea cycle, which helps remove ammonia. It is sold as a supplement fo...
L-Ornithine monograph & interactionsOther (inactive) ingredients: Hypromellose, Microcrystalline Cellulose, Magnesium Stearate. These complete the product’s ingredient list but are not active constituents.
L-Ornithine 500 mg by Swanson Drug Interactions
We don’t currently list any known drug interactions for the mapped ingredients in L-Ornithine 500 mg. This doesn’t guarantee none exist — always confirm with your pharmacist before combining a supplement with your medications.
Brand information
Manufacturer and brand details for L-Ornithine 500 mg, from the product label.
Swanson
See all Swanson products- Name
- Swanson Health Products
- City
- Fargo
- State
- ND
- ZipCode
- 58104
- Phone Number
- 1-800-437-4148
- Web Address
- swanson.com
L-Ornithine 500 mg by Swanson: Common Questions
Does L-Ornithine 500 mg by Swanson interact with any medications?
How can one product interact with so many drugs?
Where does this information come from?
Can I take this while pregnant or breastfeeding?
Will L-Ornithine help my insomnia?
Is L-Ornithine safe to take long-term?
What is L-Ornithine used for?
Written and reviewed by the HelloPharmacist editorial staff. Our editorial policy
Not sure if L-Ornithine 500 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-Ornithine 500 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-Ornithine 500 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 1 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.
Ornithine 1 reference
- Dietary Supplements: What You Need to Know — NIH Office of Dietary Supplements Source
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