Herb & supplement monograph

L-ornithine-l-aspartate Drug Interactions, Uses, Effectiveness, Safety & More

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Interaction report

Drugs that interact with L-ornithine-l-aspartate

0 medications have a known interaction with L-ornithine-l-aspartate, graded by severity. Select any drug for the full evidence-based detail.

We don’t currently list any known drug interactions for L-ornithine-l-aspartate. This doesn’t guarantee none exist — always confirm with your pharmacist before combining supplements with your medications.

Read The List Like a Pharmacist

What Severity, Likelihood & Evidence Mean

Severity — How Serious It Can Be

  • Major. Clinically significant; generally best avoided, or used only under direct professional supervision.
  • Moderate. May need monitoring, a dose adjustment, or separating the times you take each one.
  • Minor. Generally not clinically significant, but still worth noting and mentioning to your pharmacist.
  • No known interaction. Checked against our sources with nothing documented — not the same as proven safety.

Likelihood — How Well It’s Documented

  • Likely. Well-controlled human studies have demonstrated the likely existence of this interaction
  • Probable. Interaction has not been documented in well-controlled studies, however, the interaction has been demonstrated in some small human studies or in controlled animal studies in conjunction with multiple case reports.
  • Possible. Interaction has been documented in animal or in lab research, or the interaction has been documented in humans but is limited to case reports or conflicting clinical research exists
  • Unlikely. Interaction has been demonstrated in animal or in lab research but has been shown not to occur in humans.

Where This Data Comes From

  • Interaction records are evidence-graded and sourced from the Natural Medicines database (TRC Healthcare), the same reference used by pharmacists and hospitals.
  • Each drug listed above links to the full report for that exact L-ornithine-l-aspartate combination — clinical detail, likelihood, evidence level, and citations.
  • Content is reviewed by licensed HelloPharmacist pharmacists — see our data sources and editorial standards.
Monograph

L-ornithine-l-aspartate: Uses, Safety & Side Effects

The bottom line

L-ornithine-L-aspartate (LOLA) is a combination of two amino acids studied mainly for lowering ammonia in people with liver disease and helping manage hepatic encephalopathy. There is reasonable clinical evidence for this specific medical use, but it should be used under medical supervision rather than as a casual 'liver detox' supplement. Talk to your doctor or pharmacist before using it, especially if you have liver or kidney problems.

L-ornithine-l-aspartate
Common forms
Oral granules/powder, tablets, oral solution, and intravenous infusion (in clinical settings)
People commonly use it for
  • Liver-related brain symptoms (hepatic encephalopathy)
  • Lowering blood ammonia levels
  • Support in cirrhosis and fatty liver
  • General liver support

Popular and traditional uses — not proof it works. See “Uses & effectiveness” below for the evidence.

Safety at a glance
OverallUse caution

Generally used under medical supervision for liver disease; self-treating serious liver problems is not advised.

PregnancyInsufficient reliable information

Insufficient reliable information available; avoid using.

Read the full pregnancy detail
BreastfeedingInsufficient reliable information

Insufficient reliable information available; avoid using.

Read the full breastfeeding detail

Pregnancy & breastfeeding ratings are from Natural Medicines (Therapeutic Research Center). Safety guidance is general; always confirm with your pharmacist or doctor for your situation.

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Overview

L-ornithine-L-aspartate, often shortened to LOLA, is a compound made by joining two amino acids: L-ornithine and L-aspartate. Amino acids are the building blocks of proteins and are found naturally in the body. LOLA is not an herb or plant product; it is made in a lab as a stable salt of these two amino acids.

LOLA is best known as a treatment for liver disease, particularly for a condition called hepatic encephalopathy, where a poorly working liver allows toxins like ammonia to build up and affect the brain. It is available as oral granules, tablets, oral solutions, and as an intravenous (IV) infusion used in hospitals.

Because it is marketed in some places as a dietary supplement for 'liver support,' people sometimes take it on their own. However, it is most often used as a medical product for diagnosed liver conditions.

How it works

The body normally clears ammonia, a waste product of protein breakdown, through the liver. When the liver is damaged, ammonia can build up in the blood and reach the brain, causing confusion and other symptoms.

LOLA is thought to help the body remove ammonia in two main ways. The ornithine part feeds into the urea cycle, a process the liver uses to turn ammonia into urea, which is then passed out in urine. The aspartate part supports a related pathway that helps muscle and liver tissue use up ammonia by forming the amino acid glutamine.

By supporting these natural pathways, LOLA may help lower ammonia levels. Much of this understanding comes from biochemical and clinical studies, and the exact size of the effect can vary from person to person.

Effectiveness

Does L-ornithine-l-aspartate work?

Evidence overview · 5 uses evaluated
1 Possibly effective 4 Insufficient evidence
How to read these evidence grades

Natural Medicines’ 7-point scale. We show each rating’s label word-for-word.

1EffectiveStrong, consistent evidence it works.
2Likely EffectiveGood evidence, though not yet conclusive.
3Possibly EffectiveSome evidence suggests a benefit.
4Possibly IneffectiveSome evidence it may not help.
5Likely IneffectiveFairly strong evidence it doesn’t help.
6IneffectiveStrong evidence it doesn’t work.
7Insufficient Reliable Evidence to RateToo little research to say either way.
Possibly Effective Hepatic encephalopathy
Rating & evidence shown verbatim from Natural Medicines

Orally or intravenously (IV), L-ornithine-L-aspartate may improve symptoms of hepatic encephalopathy in patients with cirrhosis, but not in those with acute liver failure.

Also studied for 4 conditions — evidence insufficient to rate
Insufficient Reliable Evidence To Rate Athletic performance
Rating & evidence shown verbatim from Natural Medicines

Oral L-ornithine-L-aspartate has only been evaluated in combination with other ingredients; its benefits when used alone are unclear.

Insufficient Reliable Evidence To Rate Cachexia
Rating & evidence shown verbatim from Natural Medicines

Although there has been interest in using oral L-ornithine-L-aspartate for cachexia, there is insufficient reliable information about the clinical effects of L-ornithine-L-aspartate for this purpose.

Insufficient Reliable Evidence To Rate Cirrhosis
Rating & evidence shown verbatim from Natural Medicines

It is unclear if oral or intravenous L-ornithine-L-aspartate can reduce complications in adults with cirrhosis.

Insufficient Reliable Evidence To Rate Wound healing
Rating & evidence shown verbatim from Natural Medicines

Although there has been interest in using intravenous L-ornithine-L-aspartate for wound healing, there is insufficient reliable information about the clinical effects of L-ornithine-L-aspartate for this purpose.

Source & disclaimer. Effectiveness ratings and evidence summaries are provided by Natural Medicines (Therapeutic Research Center) and shown as licensed. Where Natural Medicines hasn’t rated a use, HelloPharmacist’s pharmacists may add their own reviewed rating and evidence (each such entry is labeled). This is educational information, not medical advice — talk with your pharmacist or doctor before starting, stopping, or changing a supplement.

Safety & precautions

LOLA is generally considered reasonably well tolerated when used as directed, and it has been used in hospitals for liver patients. Even so, it is best used under the care of a doctor or pharmacist, especially since liver disease is a serious condition that needs proper monitoring.

People with severe kidney problems should be cautious, because the kidneys help clear the byproducts of ammonia processing. Anyone with a known liver or kidney disorder should not self-treat and should get medical advice first.

Because there is not enough safety information, pregnant and breastfeeding women should avoid LOLA unless a doctor specifically recommends it. Children should also only use it under medical guidance. If you have a serious liver condition, do not rely on this supplement in place of prescribed treatment.

Side effects

LOLA is usually well tolerated, but some people experience mild side effects, most often involving the stomach. These can include nausea, vomiting, bloating, or stomach discomfort. With fast IV infusions, some people may feel nausea or notice a tingling feeling.

Serious side effects are uncommon at recommended doses. Still, if you notice an allergic reaction such as rash, itching, swelling, or trouble breathing, stop using it and seek medical care right away. Tell your healthcare provider about any unusual or persistent symptoms.

L-ornithine-l-aspartate: Reported Adverse Effects

Documented safety reports on L-ornithine-l-aspartate from the evidence-graded Natural Medicines (TRC Healthcare) database, shown word-for-word from the licensed record.

Orally and intravenously, L-ornithine-L-aspartate is generally well tolerated.

Most Common Adverse Effects:

Intravenously: Cough, muscle cramps, nausea, vomiting.

Reports by condition
DISCLAIMER: This tool is intended for informational purposes only, and should not be interpreted as specific medical advice. Patients should consult with a qualified healthcare provider before making decisions about therapies and/or health conditions.

Adverse-effects data: Natural Medicines, Therapeutic Research Center

Dosing

There is no single standardized over-the-counter dose for L-ornithine-L-aspartate, and the amounts used in studies were often given in a hospital or clinical setting. Oral and IV forms are dosed differently, and the right amount depends on the condition being treated.

If you are using a supplement product, follow the directions on the label and do not exceed them. More importantly, check with your pharmacist or doctor before starting, especially if you have liver or kidney disease, since they can advise on whether it is appropriate and what dose makes sense for you.

Pregnancy & Breastfeeding

L-ornithine-l-aspartate & Pregnancy

Insufficient reliable information

Insufficient reliable information available; avoid using.

L-ornithine-l-aspartate & Breastfeeding

Insufficient reliable information

Insufficient reliable information available; avoid using.

DISCLAIMER: This tool is intended for informational purposes only, and should not be interpreted as specific medical advice. Patients should consult with a qualified healthcare provider before making decisions about therapies and/or health conditions.

© 2026 Therapeutic Research Center

Pregnancy & lactation ratings: Natural Medicines, Therapeutic Research Center

References & further reading

The 3 references that drive our L-ornithine-l-aspartate monograph and interaction data, from the evidence-graded Natural Medicines (TRC Healthcare) database. Citations with a link open the study on PubMed or the publisher’s site.

  1. Ahmad, I., Khan, A. A., Alam, A., Dilshad, A., Butt, A. K., Shafqat, F., Malik, K., and Sarwar, S. L-ornithine-L-aspartate infusion efficacy in hepatic encephalopathy. J.Coll.Physicians Surg.Pak. 2008;18(11):684-687.
  2. Waghray A, Waghray N, Mullen K. Management of covert hepatic encephalopathy. J Clin Exp Hepatol 2015;5:S75-81. PubMed
  3. Pérez Hernández JL, Higuera de la Tijera F, Serralde-Zúñiga AE, Abdo Francis JM. Critical analysis of studies evaluating the efficacy of infusion of L-ornithine L-aspartate in clinical hepatic encephalopathy in patients with liver failure. Ann Hepatol 201
Keep reading

This information is for education only and is not a substitute for professional medical advice. Always check with your pharmacist or doctor before starting, stopping, or combining supplements and medications.

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

Product directory

Supplement products with L-ornithine-l-aspartate

92 products in our database contain L-ornithine-l-aspartate. Open any to see its full ingredient list and every drug interaction we check.

AminoLast Black Cherry by Gaspari Nutrition Powder 14.8 Ounce(s) · 420 Gram(s) View ingredients & interactions AminoLast Black Cherry by Gaspari Nutrition Powder 14.8 Ounce(s) · 420 Gram(s) View ingredients & interactions AminoLast Fruit Punch by Gaspari Nutrition Powder 14.8 Ounce(s) · 420 Gram(s) View ingredients & interactions AminoLast Guava Nectarine by Gaspari Nutrition Powder 14.8 Ounce(s) · 420 Gram(s) View ingredients & interactions AminoLast Lemon Ice by Gaspari Nutrition Powder 14.8 Ounce(s) · 420 Gram(s) View ingredients & interactions AminoLast Lemon Ice by Gaspari Nutrition Powder 2.96 Ounce(s) · 84 Gram(s) View ingredients & interactions AminoLast Orange Mango Twist by Gaspari Nutrition Powder 14.8 Ounce(s) · 420 Gram(s) View ingredients & interactions AminoLast Peach Raspberry by Gaspari Nutrition Powder 14.8 Ounce(s) · 420 Gram(s) View ingredients & interactions AminoLast Pineapple by Gaspari Nutrition Powder 14.8 Oz(s) · 420 Gram(s) View ingredients & interactions AminoLast Southern Sweet Tea by Gaspari Nutrition Powder 14.8 Ounce(s) · 420 Gram(s) View ingredients & interactions AminoLast Strawberry Kiwi by Gaspari Nutrition Powder 14.8 Ounce(s) · 420 Gram(s) View ingredients & interactions AminoLast Watermelon Blast by Gaspari Nutrition Powder 14.8 Ounce(s) · 420 Gram(s) View ingredients & interactions HyperMax Blue Razz by Performax Labs Powder 400 Gram(s) View ingredients & interactions L-Ornithine L-Aspartate by BulkSupplements.com Powder 500 Gram(s) · 17.6 Ounce(s) View ingredients & interactions L-Ornithine L-Aspartate by BulkSupplements.com Powder 1 kg · 35.3 oz View ingredients & interactions L-Ornithine L-Aspartate by BulkSupplements.com Powder 100 Gram(s) · 3.5 oz View ingredients & interactions L-Ornithine L-Aspartate by BulkSupplements.com Powder 250 Gram(s) · 8.8 oz View ingredients & interactions L-Ornithine L-Aspartate by BulkSupplements.com Powder 500 Gram(s) · 17.6 oz View ingredients & interactions L-Ornithine L-Aspartate by BulkSupplements.com Powder 1 Kilogram(s) · 35.3 Ounce(s) View ingredients & interactions L-Ornithine L-Aspartate by BulkSupplements.com Powder 100 Gram(s) · 3.5 Ounce(s) View ingredients & interactions L-Ornithine L-Aspartate by BulkSupplements.com Powder 250 Gram(s) · 8.8 Ounce(s) View ingredients & interactions L-Ornithine L-Aspartate 3000 mg by SNS Serious Nutrition Solutions Capsule 120 Veg Capsule(s) View ingredients & interactions L-Ornithine-L-Aspartate by Allergy Research Group Powder 100 Gram(s) · 3.5 Oz(s) View ingredients & interactions SizeOn Concord Grape by Gaspari Nutrition Powder 1.65 lb · 746.9 g View ingredients & interactions
Pharmacist Counseling Corner

L-ornithine-l-aspartate: Common Questions

What is L-ornithine-l-aspartate used for, and does it work?
People use L-ornithine-l-aspartate for many reasons, but the evidence varies by use. According to the Natural Medicines database, there is at least some clinical evidence supporting L-ornithine-l-aspartate for Hepatic encephalopathy. For most other uses it has been studied for, the evidence is currently insufficient to rate. See the graded list on this page, and always confirm with your pharmacist or doctor.
Does L-ornithine-l-aspartate interact with prescription medications?
We do not currently list any known drug interactions for L-ornithine-l-aspartate. This does not guarantee that none exist, so always confirm with your pharmacist before combining it with your medications.
How are L-ornithine-l-aspartate interactions rated?
Each interaction is graded major, moderate, or minor based on how clinically significant it is and the strength of the evidence behind it. Major interactions are the most serious and are best avoided, or used only under close professional supervision.
Is it safe to take L-ornithine-l-aspartate with my medications?
It depends on the specific medication. Some combinations are fine, while others call for monitoring, timing changes, or should be avoided. Check your exact drug above and confirm with your pharmacist or doctor before starting, stopping, or changing anything.
Where does this L-ornithine-l-aspartate interaction information come from?
Our interaction data is built on the Natural Medicines database — an evidence-graded reference for vitamins, herbs, and supplements — and is reviewed by licensed HelloPharmacist pharmacists, who may add clinical context.
What is L-ornithine-l-aspartate used for?
It is mainly used to help lower ammonia levels and manage hepatic encephalopathy (brain symptoms caused by liver disease). Some people also use it for general liver support, though evidence for that is weaker.
Is L-ornithine-l-aspartate a natural supplement or a medicine?
It is made from two amino acids found in the body, but it is most often used as a medical product for liver conditions. In some places it is sold as a supplement, but it is best used with medical guidance.
Can I take it just to 'detox' my liver?
There is little good evidence that it provides meaningful benefit for healthy people. Most positive research involves people who already have liver disease, so a casual detox use is not well supported.
Is it safe during pregnancy or breastfeeding?
Its safety in pregnancy and breastfeeding has not been established, so it should be avoided unless your doctor specifically recommends it.

Written and reviewed by the HelloPharmacist editorial staff. Our editorial policy

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