Optimized Carnitine With GlycoCarn Ingredients & Drug Interactions
What is this page for?
First and foremost: checking Optimized Carnitine With GlycoCarn 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
Optimized Carnitine With GlycoCarn is a dietary supplement by Life Extension with 3 active ingredients. Its ingredients are commonly taken for memory and cognitive support, nerve pain (neuropathy), energy and fatigue.Based on those ingredients, 203 medications have a known interaction with it, the most serious rated moderate. The ingredients most likely to interact are Acetyl L-Carnitine HCl. Use the checker below to test your specific medication, or read the full HelloPharmacist Interaction Report.
Check Your Meds Against Optimized Carnitine With GlycoCarn by Life Extension
Ask about any prescription or over-the-counter medication and we check it for interactions with Optimized Carnitine With GlycoCarn by Life Extension — 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 Optimized Carnitine With GlycoCarn by Life Extension
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 has 3 active ingredients: two acetyl-L-carnitine compounds (Acetyl L-Carnitine HCl and ArginoCarn Acetyl L-Carnitine Arginate Di-HCl) and GlycoCarn (glycine propionyl L-carnitine HCl). Carnitine is a compound your body makes naturally and uses to turn fat into energy, especially in your heart and muscles.
These forms are designed to support brain function and energy metabolism. The product also contains inactive ingredients — vegetable cellulose, dicalcium phosphate, stearic acid, and silica — which are fillers and capsule material.
Does it work?
Not established
The acetyl-L-carnitine in this product is rated possibly effective for age-related cognitive decline, Alzheimer disease, alcohol use disorder, diabetic neuropathy, and depression. That means there's enough evidence to suggest it might help these conditions, but the proof isn't ironclad yet.
We have no effectiveness data on file for GlycoCarn, so we can't speak to what it adds to the formula.
How safe is it?
Well-documented data
Acetyl-L-carnitine is generally well tolerated short-term, but long-term safety isn't fully established — it's something to keep in mind if you're thinking about taking this long-term. The most common side effects are agitation, dry mouth, headache, insomnia, and reduced appetite.
Some people report a fishy odor in urine, breath, or sweat. Nausea, vomiting, diarrhea, and constipation can happen, though they don't occur more often than with placebo.
There isn't enough reliable safety data during pregnancy, so it's best avoided unless your doctor advises otherwise. Safety while breastfeeding is unknown — avoiding it is the safer choice.
Meds to double-check
Moderate interaction found
Before you take this, double-check with your doctor or pharmacist if you're on blood thinners like warfarin or acenocoumarol — acetyl-L-carnitine may boost how much they work. Antidepressants and other serotonergic drugs carry a Moderate interaction risk as well.
Thyroid hormone replacement is also a concern, since carnitine may make it less effective. If you take any of these, don't start without confirming it's okay with your healthcare provider.
The bottom line
Scorecard at a glanceFully disclosed formula with no established evidence rating for its marketed use. Moderate medication interactions have been identified, and safety information is well characterized.
If you're interested in carnitine for brain health or energy and you don't take blood thinners, antidepressants, or thyroid medication, this could be worth discussing with your doctor or pharmacist. Those on warfarin or similar anticoagulants, serotonergic drugs, or thyroid hormone should definitely check their exact medications with your healthcare provider before starting.
Pregnant or breastfeeding? Talk it over with your doctor first.
Educational only — not medical advice; always confirm with your pharmacist. Our editorial policy · How we use AI
Assessment coverage: 2 of 3 active ingredients matched to our full ingredient reviews (monographs). Based on the product label dated Apr 22, 2016.
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 Optimized Carnitine With GlycoCarn, straight from the product label.
| Brand | Life Extension |
|---|---|
| Barcode (UPC) | 737870916062 |
| Net contents | 60 Vegetarian Capsule(s) |
| Market status | On market |
| Date entered into DSLD | Apr 22, 2016 |
| DSLD ID | 59033 |
| Product type | Non-nutrient/non-botanical |
| Supplement form | Capsule |
| Dietary claims / uses | All Other, Structure/Function |
| Intended target group(s) | 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 Optimized Carnitine With GlycoCarn by Life Extension, sourced from the NIH Dietary Supplement Label Database.
Supplement Facts
| Ingredient | Amount | % DV |
|---|---|---|
| Acetyl L-Carnitine HCl | 800 mg | -- |
| ArginoCarn Acetyl L-Carnitine Arginate Di-HCl | 300 mg | -- |
| GlycoCarn Glycine Propionyl L-Carnitine HCl | 300 mg | -- |
Other ingredients: Vegetable Cellulose, Dicalcium Phosphate, Stearic Acid, Silica
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.
General Statements
Scan for product info
Promotes Cellular Energy Production Naturally*
To report a serious adverse event or obtain product information, contact 1-866-280-2852.
Suggested/Recommended/Usage/Directions
Read the entire label and follow the directions carefully prior to use. DIRECTIONS: Take two (2) capsules once or twice daily, or as recommended by a healthcare practitioner. This product can be taken on an empty stomach with water or juice in the morning in divided doses or all at once.
Formula
Optimized Carnitine with GlycoCarn contains the most advanced forms of carnitine: Acetyl L-Carnitine (ALC), Acetyl L-Carnitine Arginate, and Glycine Propionyl L-Carnitine (GPLC).
Brand IP Statement(s)
The inclusion of GlycoCarn in Optimized Carnitine with GlycoCarn creates a synergistic combination that supports muscular and cardiovascular function and counteracts fatigue.*
GlycoCarn and ArginoCarn are registered trademarks of Sigma-tau HealthScience, Inc. and are protected by Sigma-tau U.S. patent # 6,703,042 and worldwide patent EP1202956. The combination of multiple forms of Carnitine is protected by Sigma-tau patent # 6,245,378.
Precautions
WARNINGS: ~ KEEP OUT OF REACH OF CHILDREN.
~ DO NOT EXCEED RECOMMENDED DOSE. ~ Do not purchase if outer seal is broken or damaged.
~ When using nutritional supplements, please consult with your physician if you are undergoing treatment for a medical condition or if you are pregnant or lactating.
Storage
Store tightly closed in a cool, dry place.
FDA Statement of Identity
Dietary Supplement
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.
Formulation
Non-GMO
General
Q00916K
Is this label outdated? Report a formula or label change and our pharmacy team will review it.
Optimized Carnitine With GlycoCarn by Life Extension 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 Optimized Carnitine With GlycoCarn by Life Extension
These are the 3 active ingredients this product is made of. Select any to open its full monograph.
Serving size2 Vegetarian Capsule(s) Dosage formCapsule Servings per container30 Amounts shown are per serving.
Most supplement products combine several ingredients, and a medication can interact with the product through any one of them. Each ingredient below shows whether it has known drug interactions.
Acetyl L-Carnitine HCl
Interacts with203 drugs
Acetyl-L-carnitine is a form of the amino acid carnitine that the body uses to help produce energy in cells. It is most studied for nerve pain and mem...
Acetyl L-Carnitine HCl monograph & interactionsArginoCarn Acetyl L-Carnitine Arginate Di-HCl
Interacts with203 drugs
Acetyl-L-carnitine is a form of the amino acid carnitine that the body uses to help produce energy in cells. It is most studied for nerve pain and mem...
ArginoCarn Acetyl L-Carnitine Arginate Di-HCl monograph & interactionsGlycoCarn Glycine Propionyl L-Carnitine HCl
Other (inactive) ingredients: Vegetable Cellulose, Dicalcium Phosphate, Stearic Acid, Silica. These complete the product’s ingredient list but are not active constituents.
Optimized Carnitine With GlycoCarn by Life Extension Drug Interactions
HelloPharmacist Interaction Report
Life Extension's Optimized Carnitine With GlycoCarn contains two forms of acetyl-L-carnitine that carry documented interactions with blood thinners (anticoagulants), antidepressants and other serotonergic drugs, and thyroid hormone replacement — all rated Moderate severity.
The most serious concern is with warfarin and acenocoumarol, where acetyl-L-carnitine may increase how much these blood thinners work in your body, raising your bleeding risk.
Read the full breakdown — every affected drug type, severity by severity
Serotonergic drugs — which include many antidepressants, some pain relievers, and migraine medications — could theoretically cause serotonin syndrome (confusion, rapid heartbeat, muscle rigidity) or narrowing of blood vessels in the brain when combined with this product. Thyroid hormone replacement may become less effective, since acetyl-L-carnitine appears to block thyroid hormone from reaching cells where it's needed.
We could not check the third ingredient, GlycoCarn (glycine propionyl L-carnitine), because we hold no interaction data for it. Altogether, these interactions span 203 individual medications.
Use the medication checker below with your exact prescriptions before you start.
Check your own medications below · Editorial policy · How we use AI
Want to check YOUR meds against Optimized Carnitine With GlycoCarn?
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 Optimized Carnitine With GlycoCarn interact with 203 drugs. Click any drug to see the details.
1 of the 3 ingredients in Optimized Carnitine With GlycoCarn interact with drugs. Each result below shows which ingredient is responsible. Acetyl L-Carnitine HCl
AcenocoumarolSintrom
How Acenocoumarol interacts with Optimized Carnitine With GlycoCarn — through 1 ingredient. Tap an ingredient for the detail:
Arginocarn Acetyl L-carnitine Arginate Di-hclAcenocoumarol (sintrom) Moderate
Interaction Summary
Theoretically, acetyl-L-carnitine might increase the anticoagulant effects of acenocoumarol.
Read the full Arginocarn Acetyl L-carnitine Arginate Di-hcl + Acenocoumarol interactionAcetaminophen, Chlorpheniramine Maleate, Dextromethorphan HbrVicks Formula 44M Cough, Cold & Flu Relief
How Acetaminophen, Chlorpheniramine Maleate, Dextromethorphan Hbr interacts with Optimized Carnitine With GlycoCarn — through 1 ingredient. Tap an ingredient for the detail:
Arginocarn Acetyl L-carnitine Arginate Di-hclSerotonergic Drugs Moderate
Interaction Summary
Theoretically, acetyl-L-carnitine might increase the risk of serotonergic side effects, including serotonin syndrome and cerebral vasoconstrictive disorders, when taken with serotonergic drugs.
Read the full Arginocarn Acetyl L-carnitine Arginate Di-hcl + Acetaminophen, Chlorpheniramine Maleate, Dextromethorphan Hbr interactionAcetaminophen, Chlorpheniramine, Codeine, PhenylephrineColrex
How Acetaminophen, Chlorpheniramine, Codeine, Phenylephrine interacts with Optimized Carnitine With GlycoCarn — through 1 ingredient. Tap an ingredient for the detail:
Arginocarn Acetyl L-carnitine Arginate Di-hclSerotonergic Drugs Moderate
Interaction Summary
Theoretically, acetyl-L-carnitine might increase the risk of serotonergic side effects, including serotonin syndrome and cerebral vasoconstrictive disorders, when taken with serotonergic drugs.
Read the full Arginocarn Acetyl L-carnitine Arginate Di-hcl + Acetaminophen, Chlorpheniramine, Codeine, Phenylephrine interactionAcetaminophen, Chlorpheniramine, DextromethorphanCoricidin II Extra Strength Cold and Flu
How Acetaminophen, Chlorpheniramine, Dextromethorphan interacts with Optimized Carnitine With GlycoCarn — through 1 ingredient. Tap an ingredient for the detail:
Arginocarn Acetyl L-carnitine Arginate Di-hclSerotonergic Drugs Moderate
Interaction Summary
Theoretically, acetyl-L-carnitine might increase the risk of serotonergic side effects, including serotonin syndrome and cerebral vasoconstrictive disorders, when taken with serotonergic drugs.
Read the full Arginocarn Acetyl L-carnitine Arginate Di-hcl + Acetaminophen, Chlorpheniramine, Dextromethorphan interactionAcetaminophen, Chlorpheniramine, Dextromethorphan HydrobromideCoricidin HBP Maximum Strength Flu
How Acetaminophen, Chlorpheniramine, Dextromethorphan Hydrobromide interacts with Optimized Carnitine With GlycoCarn — through 1 ingredient. Tap an ingredient for the detail:
Arginocarn Acetyl L-carnitine Arginate Di-hclSerotonergic Drugs Moderate
Interaction Summary
Theoretically, acetyl-L-carnitine might increase the risk of serotonergic side effects, including serotonin syndrome and cerebral vasoconstrictive disorders, when taken with serotonergic drugs.
Read the full Arginocarn Acetyl L-carnitine Arginate Di-hcl + Acetaminophen, Chlorpheniramine, Dextromethorphan Hydrobromide interactionAcetaminophen, Chlorpheniramine, Dextromethorphan, PhenylpropanolamineMulti Symptom Cold Relief
How Acetaminophen, Chlorpheniramine, Dextromethorphan, Phenylpropanolamine interacts with Optimized Carnitine With GlycoCarn — through 1 ingredient. Tap an ingredient for the detail:
Arginocarn Acetyl L-carnitine Arginate Di-hclSerotonergic Drugs Moderate
Interaction Summary
Theoretically, acetyl-L-carnitine might increase the risk of serotonergic side effects, including serotonin syndrome and cerebral vasoconstrictive disorders, when taken with serotonergic drugs.
Read the full Arginocarn Acetyl L-carnitine Arginate Di-hcl + Acetaminophen, Chlorpheniramine, Dextromethorphan, Phenylpropanolamine interactionAcetaminophen, Chlorpheniramine, Dextromethorphan, PseudoephedrineChildren's Tylenol Cold Plus Cough, Tylenol Cold Ex Strength
How Acetaminophen, Chlorpheniramine, Dextromethorphan, Pseudoephedrine interacts with Optimized Carnitine With GlycoCarn — through 1 ingredient. Tap an ingredient for the detail:
Arginocarn Acetyl L-carnitine Arginate Di-hclSerotonergic Drugs Moderate
Interaction Summary
Theoretically, acetyl-L-carnitine might increase the risk of serotonergic side effects, including serotonin syndrome and cerebral vasoconstrictive disorders, when taken with serotonergic drugs.
Read the full Arginocarn Acetyl L-carnitine Arginate Di-hcl + Acetaminophen, Chlorpheniramine, Dextromethorphan, Pseudoephedrine interactionAcetaminophen, Chlorpheniramine, Guaifenesin, Phenylephrine, SalicylamideRhinogesic GG
How Acetaminophen, Chlorpheniramine, Guaifenesin, Phenylephrine, Salicylamide interacts with Optimized Carnitine With GlycoCarn — through 1 ingredient. Tap an ingredient for the detail:
Arginocarn Acetyl L-carnitine Arginate Di-hclSerotonergic Drugs Moderate
Interaction Summary
Theoretically, acetyl-L-carnitine might increase the risk of serotonergic side effects, including serotonin syndrome and cerebral vasoconstrictive disorders, when taken with serotonergic drugs.
Read the full Arginocarn Acetyl L-carnitine Arginate Di-hcl + Acetaminophen, Chlorpheniramine, Guaifenesin, Phenylephrine, Salicylamide interactionAcetaminophen, Chlorpheniramine, PhenylephrineAlka-Seltzer PLUS, Histex SR, Protid
How Acetaminophen, Chlorpheniramine, Phenylephrine interacts with Optimized Carnitine With GlycoCarn — through 1 ingredient. Tap an ingredient for the detail:
Arginocarn Acetyl L-carnitine Arginate Di-hclSerotonergic Drugs Moderate
Interaction Summary
Theoretically, acetyl-L-carnitine might increase the risk of serotonergic side effects, including serotonin syndrome and cerebral vasoconstrictive disorders, when taken with serotonergic drugs.
Read the full Arginocarn Acetyl L-carnitine Arginate Di-hcl + Acetaminophen, Chlorpheniramine, Phenylephrine interactionAcetaminophen, Chlorpheniramine, Phenylephrine, SalicylamideRhinogesic, Rhinogesic JR
How Acetaminophen, Chlorpheniramine, Phenylephrine, Salicylamide interacts with Optimized Carnitine With GlycoCarn — through 1 ingredient. Tap an ingredient for the detail:
Arginocarn Acetyl L-carnitine Arginate Di-hclSerotonergic Drugs Moderate
Interaction Summary
Theoretically, acetyl-L-carnitine might increase the risk of serotonergic side effects, including serotonin syndrome and cerebral vasoconstrictive disorders, when taken with serotonergic drugs.
Read the full Arginocarn Acetyl L-carnitine Arginate Di-hcl + Acetaminophen, Chlorpheniramine, Phenylephrine, Salicylamide interactionAcetaminophen, Chlorpheniramine, PhenylpropanolamineAlumadrine, Conex, Sinadrin Max Strength, Sinulin
How Acetaminophen, Chlorpheniramine, Phenylpropanolamine interacts with Optimized Carnitine With GlycoCarn — through 1 ingredient. Tap an ingredient for the detail:
Arginocarn Acetyl L-carnitine Arginate Di-hclSerotonergic Drugs Moderate
Interaction Summary
Theoretically, acetyl-L-carnitine might increase the risk of serotonergic side effects, including serotonin syndrome and cerebral vasoconstrictive disorders, when taken with serotonergic drugs.
Read the full Arginocarn Acetyl L-carnitine Arginate Di-hcl + Acetaminophen, Chlorpheniramine, Phenylpropanolamine interactionAcetaminophen, Chlorpheniramine, Phenylpropanolamine, OpiumHista-Derfule
How Acetaminophen, Chlorpheniramine, Phenylpropanolamine, Opium interacts with Optimized Carnitine With GlycoCarn — through 1 ingredient. Tap an ingredient for the detail:
Arginocarn Acetyl L-carnitine Arginate Di-hclSerotonergic Drugs Moderate
Interaction Summary
Theoretically, acetyl-L-carnitine might increase the risk of serotonergic side effects, including serotonin syndrome and cerebral vasoconstrictive disorders, when taken with serotonergic drugs.
Read the full Arginocarn Acetyl L-carnitine Arginate Di-hcl + Acetaminophen, Chlorpheniramine, Phenylpropanolamine, Opium interactionAcetaminophen, Chlorpheniramine, Phenylpropanolamine, PhenyltoloxamineNorel Plus
How Acetaminophen, Chlorpheniramine, Phenylpropanolamine, Phenyltoloxamine interacts with Optimized Carnitine With GlycoCarn — through 1 ingredient. Tap an ingredient for the detail:
Arginocarn Acetyl L-carnitine Arginate Di-hclSerotonergic Drugs Moderate
Interaction Summary
Theoretically, acetyl-L-carnitine might increase the risk of serotonergic side effects, including serotonin syndrome and cerebral vasoconstrictive disorders, when taken with serotonergic drugs.
Read the full Arginocarn Acetyl L-carnitine Arginate Di-hcl + Acetaminophen, Chlorpheniramine, Phenylpropanolamine, Phenyltoloxamine interactionAcetaminophen, Chlorpheniramine, PseudoephedrineAlka-Seltzer PLUS Liquid Gels, Children's Tylenol Cold, Codimal, Comtrex, Extra Strength Tylenol Allergy Sinus, Lorsin +3 more
How Acetaminophen, Chlorpheniramine, Pseudoephedrine interacts with Optimized Carnitine With GlycoCarn — through 1 ingredient. Tap an ingredient for the detail:
Arginocarn Acetyl L-carnitine Arginate Di-hclSerotonergic Drugs Moderate
Interaction Summary
Theoretically, acetyl-L-carnitine might increase the risk of serotonergic side effects, including serotonin syndrome and cerebral vasoconstrictive disorders, when taken with serotonergic drugs.
Read the full Arginocarn Acetyl L-carnitine Arginate Di-hcl + Acetaminophen, Chlorpheniramine, Pseudoephedrine interactionAcetaminophen, DextromethorphanTylenol Cough Ex Strength
How Acetaminophen, Dextromethorphan interacts with Optimized Carnitine With GlycoCarn — through 1 ingredient. Tap an ingredient for the detail:
Arginocarn Acetyl L-carnitine Arginate Di-hclSerotonergic Drugs Moderate
Interaction Summary
Theoretically, acetyl-L-carnitine might increase the risk of serotonergic side effects, including serotonin syndrome and cerebral vasoconstrictive disorders, when taken with serotonergic drugs.
Read the full Arginocarn Acetyl L-carnitine Arginate Di-hcl + Acetaminophen, Dextromethorphan interactionAcetaminophen, Dextromethorphan, Doxylamine, PseudoephedrineVicks NyQuil
How Acetaminophen, Dextromethorphan, Doxylamine, Pseudoephedrine interacts with Optimized Carnitine With GlycoCarn — through 1 ingredient. Tap an ingredient for the detail:
Arginocarn Acetyl L-carnitine Arginate Di-hclSerotonergic Drugs Moderate
Interaction Summary
Theoretically, acetyl-L-carnitine might increase the risk of serotonergic side effects, including serotonin syndrome and cerebral vasoconstrictive disorders, when taken with serotonergic drugs.
Read the full Arginocarn Acetyl L-carnitine Arginate Di-hcl + Acetaminophen, Dextromethorphan, Doxylamine, Pseudoephedrine interactionAcetaminophen, Dextromethorphan, Guaifenesin, PhenylephrineConar-A
How Acetaminophen, Dextromethorphan, Guaifenesin, Phenylephrine interacts with Optimized Carnitine With GlycoCarn — through 1 ingredient. Tap an ingredient for the detail:
Arginocarn Acetyl L-carnitine Arginate Di-hclSerotonergic Drugs Moderate
Interaction Summary
Theoretically, acetyl-L-carnitine might increase the risk of serotonergic side effects, including serotonin syndrome and cerebral vasoconstrictive disorders, when taken with serotonergic drugs.
Read the full Arginocarn Acetyl L-carnitine Arginate Di-hcl + Acetaminophen, Dextromethorphan, Guaifenesin, Phenylephrine interactionAcetaminophen, Dextromethorphan, Guaifenesin, PhenylpropanolamineAnatuss
How Acetaminophen, Dextromethorphan, Guaifenesin, Phenylpropanolamine interacts with Optimized Carnitine With GlycoCarn — through 1 ingredient. Tap an ingredient for the detail:
Arginocarn Acetyl L-carnitine Arginate Di-hclSerotonergic Drugs Moderate
Interaction Summary
Theoretically, acetyl-L-carnitine might increase the risk of serotonergic side effects, including serotonin syndrome and cerebral vasoconstrictive disorders, when taken with serotonergic drugs.
Read the full Arginocarn Acetyl L-carnitine Arginate Di-hcl + Acetaminophen, Dextromethorphan, Guaifenesin, Phenylpropanolamine interactionAcetaminophen, Dextromethorphan, Guaifenesin, PseudoephedrineRobitussin Cold, Severe Cold, Suphedrine Cold/Cough
How Acetaminophen, Dextromethorphan, Guaifenesin, Pseudoephedrine interacts with Optimized Carnitine With GlycoCarn — through 1 ingredient. Tap an ingredient for the detail:
Arginocarn Acetyl L-carnitine Arginate Di-hclSerotonergic Drugs Moderate
Interaction Summary
Theoretically, acetyl-L-carnitine might increase the risk of serotonergic side effects, including serotonin syndrome and cerebral vasoconstrictive disorders, when taken with serotonergic drugs.
Read the full Arginocarn Acetyl L-carnitine Arginate Di-hcl + Acetaminophen, Dextromethorphan, Guaifenesin, Pseudoephedrine interactionAcetaminophen, Dextromethorphan, Phenylpropanolamine, PyrilamineTheracaps
How Acetaminophen, Dextromethorphan, Phenylpropanolamine, Pyrilamine interacts with Optimized Carnitine With GlycoCarn — through 1 ingredient. Tap an ingredient for the detail:
Arginocarn Acetyl L-carnitine Arginate Di-hclSerotonergic Drugs Moderate
Interaction Summary
Theoretically, acetyl-L-carnitine might increase the risk of serotonergic side effects, including serotonin syndrome and cerebral vasoconstrictive disorders, when taken with serotonergic drugs.
Read the full Arginocarn Acetyl L-carnitine Arginate Di-hcl + Acetaminophen, Dextromethorphan, Phenylpropanolamine, Pyrilamine interactionAcetaminophen, Dextromethorphan, PseudoephedrineAlka-Seltzer PLUS Flu Liquid Gels, Non Aspirin Cold Caps, Tylenol Cold, Tylenol Flu Daytime Ex Strength, Tylenol Flu Ex Strength
How Acetaminophen, Dextromethorphan, Pseudoephedrine interacts with Optimized Carnitine With GlycoCarn — through 1 ingredient. Tap an ingredient for the detail:
Arginocarn Acetyl L-carnitine Arginate Di-hclSerotonergic Drugs Moderate
Interaction Summary
Theoretically, acetyl-L-carnitine might increase the risk of serotonergic side effects, including serotonin syndrome and cerebral vasoconstrictive disorders, when taken with serotonergic drugs.
Read the full Arginocarn Acetyl L-carnitine Arginate Di-hcl + Acetaminophen, Dextromethorphan, Pseudoephedrine interactionAcetaminophen, MeperidineDemerol APAP
How Acetaminophen, Meperidine interacts with Optimized Carnitine With GlycoCarn — through 1 ingredient. Tap an ingredient for the detail:
Arginocarn Acetyl L-carnitine Arginate Di-hclSerotonergic Drugs Moderate
Interaction Summary
Theoretically, acetyl-L-carnitine might increase the risk of serotonergic side effects, including serotonin syndrome and cerebral vasoconstrictive disorders, when taken with serotonergic drugs.
Read the full Arginocarn Acetyl L-carnitine Arginate Di-hcl + Acetaminophen, Meperidine interactionAcetaminophen, Phenylephrine, ChlorpheniramineSuper Cold Tabs
How Acetaminophen, Phenylephrine, Chlorpheniramine interacts with Optimized Carnitine With GlycoCarn — through 1 ingredient. Tap an ingredient for the detail:
Arginocarn Acetyl L-carnitine Arginate Di-hclSerotonergic Drugs Moderate
Interaction Summary
Theoretically, acetyl-L-carnitine might increase the risk of serotonergic side effects, including serotonin syndrome and cerebral vasoconstrictive disorders, when taken with serotonergic drugs.
Read the full Arginocarn Acetyl L-carnitine Arginate Di-hcl + Acetaminophen, Phenylephrine, Chlorpheniramine interactionAlmotriptanAlmogran, Axert
How Almotriptan interacts with Optimized Carnitine With GlycoCarn — through 1 ingredient. Tap an ingredient for the detail:
Arginocarn Acetyl L-carnitine Arginate Di-hclSerotonergic Drugs Moderate
Interaction Summary
Theoretically, acetyl-L-carnitine might increase the risk of serotonergic side effects, including serotonin syndrome and cerebral vasoconstrictive disorders, when taken with serotonergic drugs.
Read the full Arginocarn Acetyl L-carnitine Arginate Di-hcl + Almotriptan interactionAlosetronLotronex
How Alosetron interacts with Optimized Carnitine With GlycoCarn — through 1 ingredient. Tap an ingredient for the detail:
Arginocarn Acetyl L-carnitine Arginate Di-hclSerotonergic Drugs Moderate
Interaction Summary
Theoretically, acetyl-L-carnitine might increase the risk of serotonergic side effects, including serotonin syndrome and cerebral vasoconstrictive disorders, when taken with serotonergic drugs.
Read the full Arginocarn Acetyl L-carnitine Arginate Di-hcl + Alosetron interactionAmitriptylineElavil
How Amitriptyline interacts with Optimized Carnitine With GlycoCarn — through 1 ingredient. Tap an ingredient for the detail:
Arginocarn Acetyl L-carnitine Arginate Di-hclSerotonergic Drugs Moderate
Interaction Summary
Theoretically, acetyl-L-carnitine might increase the risk of serotonergic side effects, including serotonin syndrome and cerebral vasoconstrictive disorders, when taken with serotonergic drugs.
Read the full Arginocarn Acetyl L-carnitine Arginate Di-hcl + Amitriptyline interactionAmitriptyline, ChlordiazepoxideLimbitrol DS
How Amitriptyline, Chlordiazepoxide interacts with Optimized Carnitine With GlycoCarn — through 1 ingredient. Tap an ingredient for the detail:
Arginocarn Acetyl L-carnitine Arginate Di-hclSerotonergic Drugs Moderate
Interaction Summary
Theoretically, acetyl-L-carnitine might increase the risk of serotonergic side effects, including serotonin syndrome and cerebral vasoconstrictive disorders, when taken with serotonergic drugs.
Read the full Arginocarn Acetyl L-carnitine Arginate Di-hcl + Amitriptyline, Chlordiazepoxide interactionAmitriptyline, PerphenazineEtrafon, Etrafon-A, Etrafon-Forte, Triavil
How Amitriptyline, Perphenazine interacts with Optimized Carnitine With GlycoCarn — through 1 ingredient. Tap an ingredient for the detail:
Arginocarn Acetyl L-carnitine Arginate Di-hclSerotonergic Drugs Moderate
Interaction Summary
Theoretically, acetyl-L-carnitine might increase the risk of serotonergic side effects, including serotonin syndrome and cerebral vasoconstrictive disorders, when taken with serotonergic drugs.
Read the full Arginocarn Acetyl L-carnitine Arginate Di-hcl + Amitriptyline, Perphenazine interactionAmoxapineAsendin
How Amoxapine interacts with Optimized Carnitine With GlycoCarn — through 1 ingredient. Tap an ingredient for the detail:
Arginocarn Acetyl L-carnitine Arginate Di-hclSerotonergic Drugs Moderate
Interaction Summary
Theoretically, acetyl-L-carnitine might increase the risk of serotonergic side effects, including serotonin syndrome and cerebral vasoconstrictive disorders, when taken with serotonergic drugs.
Read the full Arginocarn Acetyl L-carnitine Arginate Di-hcl + Amoxapine interactionAmphetamine Aspartate, Amphetamine Sulfate, Dextroamphetamine Saccharate, Dextroamphetamine SulfateAdderall, Adderall XR
How Amphetamine Aspartate, Amphetamine Sulfate, Dextroamphetamine Saccharate, Dextroamphetamine Sulfate interacts with Optimized Carnitine With GlycoCarn — through 1 ingredient. Tap an ingredient for the detail:
Arginocarn Acetyl L-carnitine Arginate Di-hclSerotonergic Drugs Moderate
Interaction Summary
Theoretically, acetyl-L-carnitine might increase the risk of serotonergic side effects, including serotonin syndrome and cerebral vasoconstrictive disorders, when taken with serotonergic drugs.
Read the full Arginocarn Acetyl L-carnitine Arginate Di-hcl + Amphetamine Aspartate, Amphetamine Sulfate, Dextroamphetamine Saccharate, Dextroamphetamine Sulfate interactionEach ingredient & the kinds of drugs it affects
For each ingredient in Optimized Carnitine With GlycoCarn 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.
Acetyl L-Carnitine HCl
Acenocoumarol (Sintrom)
Theoretically, acetyl-L-carnitine might increase the anticoagulant effects of acenocoumarol.
L-carnitine, the parent compound of acetyl-L-carnitine, might enhance the anticoagulant effects of acenocoumarol, an oral anticoagulant that is similar to warfarin, but shorter-acting. There are at least two case reports of INR elevation when L-carnitine was taken with acenocoumarol. In one case, a 33-year-old male with a previously stable INR had an elevated INR of 4.65 after L-carnitine was started and continued for 10 weeks. INR normalized after discontinuation of the L-carnitine-containing product. It is unclear if such an interaction would also occur with acetyl-L-carnitine.
Serotonergic Drugs
Theoretically, acetyl-L-carnitine might increase the risk of serotonergic side effects, including serotonin syndrome and cerebral vasoconstrictive disorders, when taken with serotonergic drugs.
Animal research shows that acetyl-L-carnitine can increase levels of serotonin in the brain.
Thyroid Hormone
Theoretically, acetyl-L-carnitine might decrease the effectiveness of thyroid hormone replacement.
L-carnitine appears to act as a peripheral thyroid hormone antagonist by inhibiting entry of thyroid hormone into the nucleus of cells. Taking L-carnitine also seems to diminish some of the symptoms of hyperthyroidism. It is unclear if such an interaction would occur with acetyl-L-carnitine.
Warfarin (Coumadin)
Theoretically, acetyl-L-carnitine might increase the anticoagulant effects of warfarin.
L-carnitine, the parent compound of acetyl-L-carnitine, might increase the anticoagulant effects of acenocoumarol, a shorter-acting oral anticoagulant similar to warfarin. There is not enough information to know whether this interaction occurs with acetyl-L-carnitine and warfarin.
Brand information
Manufacturer and brand details for Optimized Carnitine With GlycoCarn, from the product label.
Life Extension
See all Life Extension products- Name
- Quality Supplements and Vitamins, Inc.
- City
- Ft. Lauderdale
- State
- FL
- ZipCode
- 33309
- Phone Number
- 1-866-280-2852
- Web Address
- LifeExtension.com
Optimized Carnitine With GlycoCarn by Life Extension: Common Questions
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Written and reviewed by the HelloPharmacist editorial staff. Our editorial policy
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The Full Monographs Behind Optimized Carnitine With GlycoCarn’s Ingredients
Every ingredient we hold a full HelloPharmacist monograph for — uses, evidence, safety, and the complete interaction list.
Sources & How We Checked
Optimized Carnitine With GlycoCarn'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 22 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.
Acetyl-l-carnitine 22 references
- Thal LJ, Carta A, Clarke WR, et al. A 1-year multicenter placebo-controlled study of acetyl-L-carnitine in patients with Alzheimer's Disease. Neurology 1996;47:705-11. PubMed
- Sano M, Bell K, Cote L, et al. Double-blind parallel design pilot study of acetyl levocarnitine in patients with Alzheimer's Disease. Arch Neurol 1992;49:1137-41. PubMed
- Spagnoli A, Lucca U, Menasce G, et al. Long-term acetyl-L-carnitine treatment in Alzheimer's Disease. Neurology 1991;41:1726-32. PubMed
- Brooks JO 3rd, Yesavage JA, Carta A, Bravi D. Acetyl L-carnitine slows decline in younger patients with Alzheimer's disease: a reanalysis of a double-blind, placebo-controlled study using the trilinear approach. Int Psychoger 1998;10:193-203. PubMed
- Pettegrew JW, Klunk WE, Panchalingam K, et al. Clinical and neurochemical effects of acetyl-L-carnitine in Alzheimer's disease. Neurobiol Aging 1995;16:1-4. PubMed
- Rai G, Wright G, Scott L, et al. Double-blind, placebo controlled study of acetyl-l-carnitine in patients with Alzheimer's dementia. Curr Med Res Opin 1990;11:638-47. PubMed
- Benvenga S, Ruggeri RM, Russo A, et al. Usefulness of L-carnitine, a naturally occurring peripheral antagonist of thyroid hormone action, in iatrogenic hyperthyroidism: a randomized, double-blind, placebo-controlled clinical trial. J Clin Endocrinol Meta
- Montgomery SA, Thal LJ, Amrein R. Meta-analysis of double blind randomized controlled clinical trials of acetyl-L-carnitine versus placebo in the treatment of mild cognitive impairment and mild Alzheimer's disease. Int Clin Psychopharmacol 2003;18:61-71.. PubMed
- Martinez E, Domingo P, Roca-Cusachs A. Potentiation of acenocoumarol action by L-carnitine. J Intern Med 1993;233:94.
- Hudson S, Tabet N. Acetyl-L-carnitine for dementia. Cochrane Database Syst Rev 2003;2:CD003158.. PubMed
- Bachmann HU, Hoffmann A. Interaction of food supplement L-carnitine with oral anticoagulant acenocoumarol. Swiss Med Wkly 2004;134:385. PubMed
- De Grandis D, Minardi C. Acetyl-L-carnitine (levacecarnine) in the treatment of diabetic neuropathy. A long-term, randomised, double-blind, placebo-controlled study. Drugs R D 2002;3:223-31. PubMed
- 12761 Benvenga S, Amato A, Calvani M, Trimarchi F. Effects of carnitine on thyroid hormone action. Ann N Y Acad Sci 2004;1033:158-67. PubMed
- Sima AAF, Calvani M, Mehra M, et al. Acetyl-L-carnitine improves pain, nerve regeneration, and vibratory perception in patients with chronic diabetic neuropathy: An analysis of two randomized, placebo-controlled trials. Diabetes Care 2005;28:89-94.
- Youle, M. and Osio, M. A double-blind, parallel-group, placebo-controlled, multicentre study of acetyl L-carnitine in the symptomatic treatment of antiretroviral toxic neuropathy in patients with HIV-1 infection. HIV.Med. 2007;8(4):241-250.
- Brennan BP, Jensen JE, Hudson JI, Coit CE, Beaulieu A, Pope HG Jr, Renshaw PF, Cohen BM. A placebo-controlled trial of acetyl-L-carnitine and a-lipoic acid in the treatment of bipolar depression. J Clin Psychopharmacol. 2013 Oct;33(5):627-35.
- Ledinek AH, Sajko MC, Rot U. Evaluating the effects of amantadin, modafinil and acetyl-L-carnitine on fatigue in multiple sclerosis--result of a pilot randomized, blind study. Clin Neurol Neurosurg. 2013 Dec;115 Suppl 1:S86-9. PubMed
- Martinotti G, Andreoli S, Reina D, Di Nicola M, Ortolani I, Tedeschi D, Fanella F, Pozzi G, Iannoni E, D'Iddio S, Prof LJ. Acetyl-l-Carnitine in the treatment of anhedonia, melancholic and negative symptoms in alcohol dependent subjects. Prog Neuropsychop PubMed
- Baek SM, Zheng R, Seo EJ, Hwang DY, Kim BH. Pharmacokinetic comparisons of two acetyl-L-carnitine formulations in healthy Korean volunteers. Int J Clin Pharmacol Ther. 2015;53(11):980-6. PubMed
- Goodison G, Overeem K, de Monte V, Siskind D. Mania associated with self-prescribed acetyl-l-carnitine in a man with bipolar I disorder. Australas Psychiatry. 2017;25(1):13-4.
- Bruno A, Pandolfo G, Crucitti M, Lorusso S, Zoccali RA, Muscatello MR. Acetyl-L-Carnitine Augmentation of Clozapine in Partial-Responder Schizophrenia: A 12-Week, Open-Label Uncontrolled Preliminary Study. Clin Neuropharmacol. 2016;39(6):277-80. PubMed
- Veronese N, Stubbs B, Solmi M, Ajnakina O, Carvalho AF, Maggi S. Acetyl-L-Carnitine Supplementation and the Treatment of Depressive Symptoms: A Systematic Review and Meta-Analysis. Psychosom Med. 2018;80(2):154-9. PubMed
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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.
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