Herb & supplement monograph

Glutamine Drug Interactions, Uses, Effectiveness, Safety & More

Medically reviewed by Dr. Brian Staiger, PharmD, BCPS ·Updated July 2026

What is this page for?

First and foremost: how Glutamine interacts with medications. The heart of this page is the interaction list — every drug Glutamine is known to interact with, and how serious each one is.

But these pages have grown well beyond that into a full monograph — what Glutamine is, what people use it for and how strong the evidence is, its safety and side effects, and answers to the questions we’re asked most — written and reviewed by the clinical staff at HelloPharmacist. It’s educational information from our licensed clinical databases, not medical advice, and we don’t sell or endorse products. Our editorial policy

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Glutamine Drug Interactions: The Bottom Line

From the HelloPharmacist Editorial Team · Updated July 2026

Based on the available evidence, the overall risk of a clinically significant Glutamine drug interaction appears low for most people. None of the listed interactions are rated major, and the main concern comes from theory rather than anything shown to happen in people.

Interactions deserving the most attention

The one group that stands out is anticonvulsants, the medications used to control seizures. The body converts glutamine into glutamate, a brain chemical that excites nerve activity, so in theory extra glutamine could work against seizure medicines. This has never actually been reported in humans, but because seizure control leaves little room for error, we think anyone taking these medications should treat glutamine with extra caution and keep their prescriber in the loop.

What the rest of the list means

Although dozens of medications appear on the interaction list, that number does not mean each combination is harmful. The concern here rests on a single predicted mechanism, not on documented problems in people, and no interaction has been confirmed in human studies. For most medications, glutamine has no established effect at all.

Check your medications against Glutamine

Based on HelloPharmacist’s Glutamine interaction data and reviewed under our editorial standards.

Interaction report

Drugs that interact with Glutamine

50 medications have a known interaction with Glutamine, graded by severity. Select any drug for the full evidence-based detail.

Don’t want to scroll the list? Just ask.

Tell us the medications you take and we’ll check each one against Glutamine using our pharmacist-reviewed interaction data.

AI summaries are generated from our Glutamine interaction data for education only — always confirm with your pharmacist. How we use AI

2,830 drugs

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 Glutamine combination — clinical detail, likelihood, evidence level, and citations.
Content is reviewed by licensed HelloPharmacist pharmacists — see our data sources and editorial standards.

The big picture

The kinds of drugs Glutamine affects

Every type of medication (drug category) Glutamine is known to interact with. Open any category for the detail — or search your exact drug in the checker above.

All 1 drug category Glutamine interacts with

Anticonvulsants

Theoretically, glutamine might antagonize the effects of anticonvulsant medications.
Glutamine is metabolized to the excitatory neurotransmitter glutamate. Glutamate might have antagonistic effects with anticonvulsant drugs. However, this interaction has not yet been reported in humans.

Likelihood Possible Evidence D

Monograph

Glutamine: Uses, Safety & Side Effects

Medically reviewed by Dr. Brian Staiger, PharmD, BCPS · Reviewed July 2026 ·

The bottom line

Glutamine is the most abundant amino acid in the body and is usually made in your muscles. A prescription form is FDA-approved to help reduce sickle cell disease complications, but for most popular uses such as muscle building, gut health, and immunity the evidence is limited or mixed. It is generally well tolerated in healthy people, but anyone with serious liver or kidney problems should check with a doctor first.

Part used: Amino acid (made in the body and found in protein-rich foods)
Common forms: Powder, capsules, tablets, prescription oral powder (for sickle cell disease)

People commonly use it for

Muscle recovery and sports performance
Gut health and 'leaky gut'
Recovery from severe illness or injury
Immune support
Side effects of cancer treatment (mucositis)
Sickle cell disease (prescription form)

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

Safety at a glance

OverallUse caution

Generally well tolerated in healthy adults, but people with kidney or liver disease should use it only under medical supervision.

PregnancyLikely Safe

When consumed in amounts commonly found in foods. There is insufficient reliable information available about the safety of glutamine when used in larg...

Read the full pregnancy detail

BreastfeedingLikely Safe

When consumed in amounts commonly found in foods. There is insufficient reliable information available about the safety of glutamine when used in larg...

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

Glutamine (often sold as L-glutamine) is an amino acid, one of the building blocks the body uses to make protein. It is the most common free amino acid in your blood and muscles. Unlike an herb, it does not come from a plant you grow; your body makes most of it in your skeletal muscle, and you also get it from protein-rich foods like meat, fish, eggs, dairy, and beans.

Glutamine is normally called a non-essential amino acid because your body can make it on its own. However, during times of major physical stress, such as serious infection, surgery, burns, or trauma, your body may use up glutamine faster than it can make it. In those situations it is considered conditionally essential.

As a supplement, glutamine is popular with athletes and people interested in gut and immune health. A specific prescription form is also approved to help people with sickle cell disease.

How it works

Glutamine plays several roles in the body. It acts as a major carrier of nitrogen and carbon between organs, helping balance amino acids throughout the body.

It is also an important fuel source for fast-dividing cells, including cells that line the intestines and certain immune cells. Because of this, supporters believe glutamine may help maintain the gut lining and support the immune system, especially when the body is under stress.

In sickle cell disease, glutamine is thought to reduce stress on red blood cells by helping with the cell's natural antioxidant balance, which may make painful crises less frequent.

Many of these proposed mechanisms come from laboratory and animal research or from studies in very ill patients, and they do not always translate into clear benefits for healthy people.

Effectiveness

Does Glutamine work?

Here’s what the research actually shows for each use — graded by Natural Medicines and reviewed by Dr. Brian Staiger, PharmD.

Evidence overview · 43 uses evaluated

1 Effective 4 Possibly effective 8 Leans ineffective 30 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.

Effective Sickle cell disease