Interactions on record — worth a quick check against your medications. Check your meds →
Dietary supplement

L-Glutamine Ingredients & Drug Interactions

by Lidtke

L-Glutamine label
See full label image
Powder Category: Amino Acid/protein
Most serious interaction: Moderate
Clinical methodology reviewed by · Updated Sep 16, 2026 · Label data from the NIH DSLD
What is this page for?

First and foremost: checking L-Glutamine 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

The interaction bottom line Most serious interaction: Moderate

L-Glutamine is a dietary supplement by Lidtke with 1 active ingredient. Its ingredients are commonly taken for muscle recovery and sports performance, gut health and 'leaky gut', recovery from severe illness or injury.Based on those ingredients, 50 medications have a known interaction with it, the most serious rated moderate. The ingredients most likely to interact are L-Glutamine. Use the checker below to test your specific medication, or read the full HelloPharmacist Interaction Report.

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Check Your Meds Against L-Glutamine by Lidtke

Ask about any prescription or over-the-counter medication and we check it for interactions with L-Glutamine by Lidtke — and tell you which ingredient is responsible.

Pharmacist-reviewed data Checks every ingredient Answer in seconds
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HelloPharmacist Scorecard of L-Glutamine by Lidtke

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.

From our pharmacy team — supplement deep dive

Generated from HelloPharmacist’s pharmacist-curated databases and editorial rules · Last generated Aug 13, 2026

What’s inside

Full disclosure
Ingredient Transparency · database check
Full

Every active ingredient lists its own amount on the label.

Why this rating?
  • The label discloses an exact amount for 1 of its 1 active ingredient.
  • No proprietary blends here — you can verify the dose of every single component.

L-Glutamine by Lidtke is a single-ingredient supplement — pure L-glutamine in powder form. L-glutamine is an amino acid your body makes and uses for several purposes, including supporting the lining of your digestive tract and helping your immune system.

The product contains no other active ingredients and no inactive fillers.

Does it work?

Strong evidence
Evidence for Intended Use · database check
By FDA rules, dietary supplements can’t claim to treat, cure, or prevent disease — so labels speak in careful marketing language. We discern each product’s intended use from its name, label claims, and label statements, then grade the clinical evidence for that use. How these ratings are computed

This product doesn't appear to be marketed for a specific use, so we graded Glutamine's overall clinical evidence instead.

Strong

Strong clinical evidence supports Glutamine for:

Why this rating?
  • We looked at the product name, claims, and label statements and couldn't find a stated purpose to grade.
  • Since the label doesn't commit to one use, we graded the ingredient's overall clinical evidence instead.
  • On file: Sickle cell disease — rated "Effective" (Natural Medicines).
  • On file: HIV/AIDS-related wasting — rated "Possibly Effective" (Natural Medicines).
  • On file: Critical illness (trauma) — rated "Possibly Effective" (Natural Medicines).
  • On file: Postoperative recovery — rated "Possibly Effective" (Natural Medicines).
  • On file: Pancreatitis — rated "Possibly Effective" (Natural Medicines).

The evidence we hold shows L-glutamine is effective for sickle cell disease. It's rated possibly effective for HIV/AIDS-related wasting, postoperative (after-surgery) recovery, and critical illness from trauma.

Outside those areas, we don't have effectiveness ratings on file.

The evidence, ingredient by ingredient Glutamine

How safe is it?

Well-documented data
Safety Information · database check
Well characterized

Adverse-effect, pregnancy, and general safety data are on file for most of these ingredients.

Why this rating?
  • We hold adverse-effect (side-effect) data for 1 of the 1 matched ingredient.
  • Pregnancy & breastfeeding safety ratings cover 1 of 1.
  • General safety write-ups exist for 1 of 1.
  • Remember: this measures how much safety information exists. Thin data is not the same as being safe.

L-glutamine is generally well tolerated in healthy adults. People with kidney or liver disease should only use it under medical supervision.

If you're pregnant, the safety data rates it as likely safe — a positive signal. For breastfeeding, there isn't enough reliable safety information, so you should avoid supplement doses unless your doctor recommends them.

The most common side effects reported with oral glutamine are gastrointestinal ones: belching, bloating, constipation, diarrhea, flatulence, and nausea or vomiting. Headache and musculoskeletal pain have also been reported.

A small number of people taking high doses or those with bipolar disorder have experienced dizziness, mania, or hypomania; these resolved when the dose was reduced or stopped.

Side effects, ingredient by ingredient Glutamine

Meds to double-check

Moderate interaction found
Known Interaction Concern · database check
Moderate identified

The most serious documented interaction for these ingredients is Moderate. Check your medications for a personalized result.

Why this rating?
  • 1 of the 1 matched ingredient can interact with medications — Glutamine.
  • The most serious interaction on file is rated Moderate.
  • Some involve high-stakes drug classes: seizure medications.
  • For scale: 50 individual medications appear in the full list. A big number alone doesn't make a product dangerous — what matters is whether YOUR medication is on it, so run yours through the interaction checker on this page.

If you take anticonvulsant medications (seizure drugs), check with your doctor or pharmacist before using L-Glutamine. The supplement is theoretically thought to interfere with how these medications work, though this hasn't been confirmed in people.

For all other medications you're on, no interactions are documented for glutamine in our data — but that doesn't guarantee none exist, so it's worth a quick review with your provider.

Check your own medication Run your meds through the checker above

The bottom line

Scorecard at a glanceFully disclosed formula with strong clinical evidence behind its ingredients' uses. Moderate medication interactions have been identified, and safety information is well characterized.

L-Glutamine may help with sickle cell disease and possibly with recovery from surgery or critical illness. If you take seizure medications (anticonvulsants), check with your doctor or pharmacist before starting this product.

It's generally well tolerated, but gastrointestinal side effects are common at higher doses. Talk it over with your own healthcare provider to see if it fits your situation.

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 Dec 18, 2021.

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

At a glance

General information

Key facts about L-Glutamine, straight from the product label.

Brand Lidtke
Barcode (UPC) 630610002660
Net contents 300 Gram(s)
Market status On market
Date entered into DSLD Dec 18, 2021
DSLD ID 257197
Product type Amino Acid/protein
Supplement form Powder
Dietary claims / uses Nutrient, All Other, Structure/Function
Intended target group(s) Vegetarian, Adult (18 - 50 Years)
From the label
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-Glutamine by Lidtke, sourced from the NIH Dietary Supplement Label Database.

Supplement Facts

Daily Value (DV) Target Group(s):
Adults and children 4 or more years of age
Minimum serving Sizes:
1 Level Teaspoon(s)
Maximum serving Sizes:
1 Level Teaspoon(s)
Servings per container
100
UPC/BARCODE
630610002660
IngredientAmount% DV
L-Glutamine3000 mg--

Other ingredients: None

Tap any ingredient to jump to its full detail below.

Label statements
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.
General Statements

Thank you for choosing L-Glutamine by Lidtke. We sincerely wish the best of health for you and your family.

Lidtke stands behind each product and guarantees customer satisfaction for 365 days from the date of purchase.

Superb quality since 1994

Formulation

Guaranteed the finest quality! We searched the world for the purest natural vegan L-Glutamine available. Exceeds pharmaceutical standards JP, USP, and EP

Non-GMO...no genetically-modified organisms

Made in the U.S.A.

Lidtke's L-Glutamine powder is a free-form, vegetarian, conditionally-essential amino acid that dissolves easily for quick absorption.

Pharmaceutical grade for stomach, intestine, kidney & muscle health

Purest on the planet

No fillers or flow agents. No added gluten, yeast, wheat, corn, soy, rice, milk, dairy, eggs, tree nuts, peanuts, fish, shellfish, salt, sugar, animal derivatives, artificial color or flavor. Non-GMO.

As certified by the manufacturer. These amounts are approximate due to the nature of this product.

Formula

Lidtke's L-Glutamine powder is a free-form, vegetarian, conditionally-essential amino acid that dissolves easily for quick absorption.

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.

Precautions

Warning: Keep out of reach of children.

If you are pregnant, lactating, taking any medication or have a medical condition, consult your doctor.

Discontinue use if adverse reaction occurs. Do not use if seal is damaged or missing.

Adverse events may be reported above.

Storage

Keep lid tightly closed. Keep in a cool, dry place.

FDA Statement of Identity

A Dietary Supplement

Suggested/Recommended/Usage/Directions

Directions (Adults): Take one (1) level teaspoon per day or as directed by a health care professional.

Is this label outdated? Report a formula or label change and our pharmacy team will review it.

See for yourself

L-Glutamine by Lidtke label

The label scan from the NIH Dietary Supplement Label Database. Tap to enlarge.

L-Glutamine label

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)
What’s inside

The Ingredients in L-Glutamine by Lidtke

This is the 1 active ingredient this product is made of. Select it to open its full monograph.

Serving size1 Level Teaspoon(s) Dosage formPowder Servings per container100 Amounts shown are per serving.

L-Glutamine

Interacts with
50 drugs
3000 mg per serving

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 c...

L-Glutamine monograph & interactions

Other (inactive) ingredients: None. These complete the product’s ingredient list but are not active constituents.

Interaction report

L-Glutamine by Lidtke Drug Interactions

Want to check YOUR meds against L-Glutamine?

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 checker
50Drugs
50 Moderate

Ingredients driving the most interactions

L-Glutamine 50

Individual Drug Interactions

The ingredients in L-Glutamine interact with 50 drugs. Click any drug to see the details.

1 of the 1 ingredient in L-Glutamine interact with drugs. Each result below shows which ingredient is responsible. L-Glutamine

Each ingredient & the kinds of drugs it affects

For each ingredient in L-Glutamine 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-Glutamine1 drug type · 50 drugs

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
L-Glutamine full monograph & interactions
The maker

Brand information

Manufacturer and brand details for L-Glutamine, from the product label.

Lidtke

See all Lidtke products
Name
Lidtke Technologies
City
Chandler
State
AZ
ZipCode
85226
Phone Number
1-800-404-8185
Web Address
www.lidtke.com
Pharmacist Counseling Corner

L-Glutamine by Lidtke: Common Questions

Does L-Glutamine by Lidtke interact with any medications?
Yes. Based on its ingredients, L-Glutamine has a known interaction with 50 medications. Use the checker to see how it interacts with a specific drug.
How can one product interact with so many drugs?
L-Glutamine contains a single active ingredient, and that one ingredient can interact with many different medications on its own. We check it against each medication and show the mechanism responsible.
Where does this information come from?
The product label data comes from the NIH Dietary Supplement Label Database (DSLD); the interaction data is built on the Natural Medicines database and reviewed by HelloPharmacist pharmacists.
Is L-glutamine safe to take while I'm pregnant?
Yes — the safety data we hold rates L-glutamine as likely safe in pregnancy. That said, any decision to take a supplement while pregnant should be discussed with your own doctor, who knows your full health picture.
What are the most common side effects?
Stomach-related side effects are most common: bloating, gas, constipation, diarrhea, nausea, and belching. Headache and muscle aches have also been reported. These tend to happen more often at higher doses — doses of 10-30 grams daily in studies on sickle cell disease, for example. Starting with a smaller dose may help.
Can I take this if I have kidney or liver disease?
You shouldn't use L-glutamine without medical supervision if you have kidney or liver disease. Talk with your doctor first, since your body may process it differently.
Does L-glutamine actually work for what people use it for?
It's effective for sickle cell disease. For surgery recovery, trauma, and HIV/AIDS-related weight loss, the evidence rates it as possibly effective — meaning there's some support, but it's not as strong as the sickle cell data.
Is this just a filler, or is there actual active ingredient in here?
This is pure L-glutamine — no fillers or other inactive ingredients. One scoop is L-glutamine, nothing else.
What is L-glutamine and what does it do in my body?
L-glutamine is an amino acid — one of the building blocks of protein. Your body makes it naturally and uses it to support your gut lining and immune system, especially during stress, illness, or intense exercise.

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

Not sure if L-Glutamine is safe with your meds?

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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.

L-Glutamine label
Go deeper

The Full Monographs Behind L-Glutamine’s Ingredients

Every ingredient we hold a full HelloPharmacist monograph for — uses, evidence, safety, and the complete interaction list.

Herb & supplement monograph

Glutamine

Interacts with 50 drugs

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...

Read the full Glutamine monograph →
Sources

Sources & How We Checked

L-Glutamine'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.

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 11 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.

Glutamine 11 references
  1. Miller AL. Therapeutic considerations of L-glutamine: a review of the literature. Altern Med Rev 1999;4:239-48..
  2. Bozzetti F, Biganzoli L, Gavazzi C, et al. Glutamine supplementation in cancer patients receiving chemotherapy: a double-blind randomized study. Nutrition 1997;13:748-51.. PubMed
  3. Mebane AH. L-Glutamine and mania. Am J Psychiatry 984;141:1302-3.
  4. Meldrum BS. Glutamate as a neurotransmitter in the brain: review of physiology and pathology. J Nutr 2000;130:1007S-15S.. PubMed
  5. Garlick PJ. Assessment of the safety of glutamine and other amino acids. J Nutr 2001;131:2556S-61S.. PubMed
  6. Chapman AG. Glutamate and epilepsy. J Nutr 2000;130:1043S-5S.. PubMed
  7. Ziegler TR. Glutamine supplementation in cancer patients receiving bone marrow transplantation and high dose chemotherapy. J Nutr 2001;131:2578S-84S.. PubMed
  8. Laviano A, Molfino A, Lacaria MT, Canelli A, De Leo S, Preziosa I, Rossi Fanelli F. Glutamine supplementation favors weight loss in nondieting obese female patients. A pilot study. Eur J Clin Nutr. 2014 Nov;68(11):1264-6. PubMed
  9. Endari (l-glutamine) [package insert]. Torrance, CA: Emmaus Medical,Inc; 2017.
  10. Niihara Y, Miller ST, Kanter J, et al. A Phase 3 Trial of l-Glutamine in Sickle Cell Disease. N Engl J Med 2018;379(3):226-35. doi: 10.1056/NEJMoa1715971.
  11. Ogden HB, Child RB, Fallowfield JL, et al. Gastrointestinal Tolerance of Low, Medium and High Dose Acute Oral l-Glutamine Supplementation in Healthy Adults: A Pilot Study. Nutrients. 2020;12(10):2953. PubMed

See these in context on the Glutamine monograph →

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

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