GPLC Carnitine 60 mg Ingredients & Drug Interactions
What is this page for?
First and foremost: checking GPLC Carnitine 60 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
GPLC Carnitine 60 mg is a dietary supplement by Physician's Preference with 3 active ingredients. Its ingredients are commonly taken for heart health, statin-related muscle aches, migraine prevention.Based on those ingredients, 216 medications have a known interaction with it, the most serious rated moderate. The ingredients most likely to interact are Coenzyme Q10, Propionyl-L-Carnitine, Glycine. Use the checker below to test your specific medication, or read the full HelloPharmacist Interaction Report.
Check Your Meds Against GPLC Carnitine 60 mg by Physician's Preference
Ask about any prescription or over-the-counter medication and we check it for interactions with GPLC Carnitine 60 mg by Physician's Preference — 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
Ask the Pharmacist
A licensed pharmacist will answer your question by email — free, usually within 24 hours.
Got it — thank you!
A licensed pharmacist will answer within 24 hours. Keep an eye on your email (worth checking spam, just in case).
HelloPharmacist Scorecard of GPLC Carnitine 60 mg by Physician's Preference
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
GPLC Carnitine contains three active ingredients. Glycine is an amino acid that shows possibly effective evidence for schizophrenia but has insufficient evidence for other conditions like ADHD and benign prostatic hyperplasia.
Coenzyme Q10 is likely effective for CoQ10 deficiency itself and possibly effective for heart failure, migraine, fibromyalgia, and nerve damage from diabetes. Propionyl-L-Carnitine is possibly effective for heart failure, angina, cardiovascular disease, and ulcerative colitis.
The product also contains inactive ingredients including cellulose, rice bran, magnesium stearate, and silica as binders and fillers.
Does it work?
Moderate evidence
Evidence for this product as a combination is not established in our data. Looking at the individual ingredients: Coenzyme Q10 is likely effective if you actually have a CoQ10 deficiency, and possibly effective for heart-related conditions and migraines.
Propionyl-L-Carnitine is possibly effective for heart failure, chest pain, and cardiovascular disease. Glycine is possibly effective specifically for schizophrenia.
For other uses, the evidence is insufficient or lacking.
How safe is it?
Well-documented data
Coenzyme Q10 is generally well tolerated by most adults; gastrointestinal side effects like nausea and diarrhea occur in less than 1% of users. Propionyl-L-Carnitine is well tolerated for short-term use but you should talk to your healthcare provider first; diarrhea, nausea, and vomiting are the most common side effects, and a fishy odor of urine, breath, and sweat has been reported.
Glycine is generally well tolerated at typical doses, though mild sedation, insomnia, irritability, nausea, and vomiting have been reported rarely; long-term safety data are limited. For pregnancy: Propionyl-L-Carnitine safety data advise against use.
For Glycine and Coenzyme Q10, there isn't enough reliable safety data—talk with your doctor or pharmacist for personalized advice. For breastfeeding: Propionyl-L-Carnitine should be avoided; Glycine and Coenzyme Q10 have not been well studied—check with your doctor.
Meds to double-check
Moderate interaction found
Before you start, double-check if you take blood thinners like warfarin or acenocoumarol (Moderate risk)—this product may reduce their effectiveness. Also flag clozapine for schizophrenia (Moderate), thyroid hormone replacement (Moderate), chemotherapy drugs like cyclophosphamide (Moderate), or blood pressure medications (Minor).
The bottom line
Scorecard at a glanceFully disclosed formula with some supporting evidence for its stated purpose. Moderate medication interactions have been identified, and safety information is well characterized.
This product targets heart health and cardiovascular function based on its ingredients' evidence. If you take warfarin, acenocoumarol, clozapine, chemotherapy, blood pressure medications, or thyroid hormone replacement, check with your pharmacist before starting.
Pregnant or breastfeeding? Talk with your doctor or pharmacist—safety data for these ingredients during pregnancy and lactation are limited or advise against use.
Educational only — not medical advice; always confirm with your pharmacist. Our editorial policy · How we use AI
Assessment coverage: 3 of 3 active ingredients matched to our full ingredient reviews (monographs). Based on the product label dated Jul 25, 2012.
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 GPLC Carnitine 60 mg, straight from the product label.
| Brand | Physician's Preference |
|---|---|
| Barcode (UPC) | 811749011109 |
| Net contents | 60 Vcap(s)(R) |
| Market status | Off market |
| Date entered into DSLD | Jul 25, 2012 |
| DSLD ID | 11134 |
| Product type | Other Combinations |
| Supplement form | Capsule |
| Dietary claims / uses | All Other, Structure/Function |
| Intended target group(s) | Vegan, Vegetarian, Adult (18 - 50 Years), Gluten Free, Dairy Free |
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 GPLC Carnitine 60 mg by Physician's Preference, sourced from the NIH Dietary Supplement Label Database.
Supplement Facts
| Ingredient | Amount | % DV |
|---|---|---|
| Glycine | 348 mg | -- |
| Coenzyme Q10 | 60 mg | -- |
| Propionyl-L-Carnitine | 1000 mg | -- |
| GlycoCarn(R) GPLC | 1516 mg | -- |
Other ingredients: Cellulose, Rice Bran, Magnesium Stearate, 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.
Suggested/Recommended/Usage/Directions
Suggested Usage: As a dietary supplement, take 2 Vcaps(R) 1 to 3 times daily, preferably with food.
Brand IP Statement(s)
GlycoCarn(R) (Glycine Propionyl-L-Carnitine) GPLC is a patented, highly bioavailable form of Carnitine.
GlycoCarn(R) is a registered trademark of Sigma-Tau HealthScience and is manufactured under USA production patent 6,703,042 and other foreign patents. The combination of GlycoCarn(R) GPLC and CoQ10 is patented by Sigma-Tau Industries under USA patent 6,814,972.
Vcaps(R) is a registered trademark of Capsugel.
General Statements
Carnitine is an amino acid that plays a crucial role in muscle function by regulating energy flow across cell membranes during exercise.
Daily Essentials
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.
FDA Statement of Identity
Dietary Supplement
Formulation
Contains no sugar, salt, yeast, wheat, gluten, corn, soy, milk, egg, shellfish or preservatives.
Vegetarian/Vegan Product.
Vegetarian Formula
Storage
Store in a cool, dry place.
Formula
With CoQ10
Is this label outdated? Report a formula or label change and our pharmacy team will review it.
GPLC Carnitine 60 mg by Physician's Preference 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 GPLC Carnitine 60 mg by Physician's Preference
These are the 3 active ingredients this product is made of. Select any to open its full monograph.
Serving size2 Vcap(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.
Coenzyme Q10
Interacts with198 drugs
CoQ10 is a vitamin-like substance your body makes naturally that helps cells produce energy and acts as an antioxidant. It is generally well tolerated...
Coenzyme Q10 monograph & interactionsGlycoCarn(R) GPLC
Other (inactive) ingredients: Cellulose, Rice Bran, Magnesium Stearate, Silica. These complete the product’s ingredient list but are not active constituents.
GPLC Carnitine 60 mg by Physician's Preference Drug Interactions
HelloPharmacist Interaction Report
GPLC Carnitine by Physician's Preference contains three active ingredients, and together they interact with medications across multiple categories.
The most serious concern is with blood thinners (anticoagulants): both Coenzyme Q10 and Propionyl-L-Carnitine may reduce warfarin's effectiveness, and Propionyl-L-Carnitine may also increase the blood-thinning effect of acenocoumarol, a shorter-acting anticoagulant similar to warfarin. These are Moderate-severity interactions.
Read the full breakdown — every affected drug type, severity by severity
Glycine carries a Moderate interaction with clozapine (an antipsychotic), where adding glycine to clozapine therapy may worsen schizophrenia symptoms compared to clozapine alone. Additionally, Coenzyme Q10 may theoretically reduce the activity of chemotherapy drugs that work by generating free radicals (alkylating agents), also a Moderate-severity concern.
Coenzyme Q10 also carries a Minor interaction with blood pressure medications, where it might lower blood pressure further.
Propionyl-L-Carnitine may also interfere with thyroid hormone replacement by blocking thyroid hormone from entering cells, a Moderate-severity effect. Altogether, these interactions span 214 individual medications.
Use the medication checker below with your exact prescriptions before starting this product.
Check your own medications below · Editorial policy · How we use AI
Want to check YOUR meds against GPLC Carnitine 60 mg?
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 GPLC Carnitine 60 mg interact with 216 drugs. Click any drug to see the details.
3 of the 3 ingredients in GPLC Carnitine 60 mg interact with drugs. Each result below shows which ingredient is responsible. Coenzyme Q10 Propionyl-L-Carnitine Glycine
AcenocoumarolSintrom
How Acenocoumarol interacts with GPLC Carnitine 60 mg — through 1 ingredient. Tap an ingredient for the detail:
Propionyl-l-carnitineAcenocoumarol (sintrom) Moderate
Interaction Summary
Theoretically, propionyl-L-carnitine might increase the anticoagulant effects of acenocoumarol.
Read the full Propionyl-l-carnitine + Acenocoumarol interactionAltretamineHexalen
How Altretamine interacts with GPLC Carnitine 60 mg — through 1 ingredient. Tap an ingredient for the detail:
Coenzyme Q10Alkylating Agents Moderate
Interaction Summary
Coenzyme Q10 has antioxidant effects.
Read the full Coenzyme Q10 + Altretamine interactionBendamustineBelrapzo, Treanda, Vivimusta
How Bendamustine interacts with GPLC Carnitine 60 mg — through 1 ingredient. Tap an ingredient for the detail:
Coenzyme Q10Alkylating Agents Moderate
Interaction Summary
Coenzyme Q10 has antioxidant effects.
Read the full Coenzyme Q10 + Bendamustine interactionBendamustine HydrochlorideBendeka
How Bendamustine Hydrochloride interacts with GPLC Carnitine 60 mg — through 1 ingredient. Tap an ingredient for the detail:
Coenzyme Q10Alkylating Agents Moderate
Interaction Summary
Coenzyme Q10 has antioxidant effects.
Read the full Coenzyme Q10 + Bendamustine Hydrochloride interactionBusulfanBusulfex, Myleran
How Busulfan interacts with GPLC Carnitine 60 mg — through 1 ingredient. Tap an ingredient for the detail:
Coenzyme Q10Alkylating Agents Moderate
Interaction Summary
Coenzyme Q10 has antioxidant effects.
Read the full Coenzyme Q10 + Busulfan interactionCarboplatinParaplatin
How Carboplatin interacts with GPLC Carnitine 60 mg — through 1 ingredient. Tap an ingredient for the detail:
Coenzyme Q10Alkylating Agents Moderate
Interaction Summary
Coenzyme Q10 has antioxidant effects.
Read the full Coenzyme Q10 + Carboplatin interactionCarmustineBiCNU, Gliadel, Gliadel Wafer
How Carmustine interacts with GPLC Carnitine 60 mg — through 1 ingredient. Tap an ingredient for the detail:
Coenzyme Q10Alkylating Agents Moderate
Interaction Summary
Coenzyme Q10 has antioxidant effects.
Read the full Coenzyme Q10 + Carmustine interactionChlorambucilLeukeran
How Chlorambucil interacts with GPLC Carnitine 60 mg — through 1 ingredient. Tap an ingredient for the detail:
Coenzyme Q10Alkylating Agents Moderate
Interaction Summary
Coenzyme Q10 has antioxidant effects.
Read the full Coenzyme Q10 + Chlorambucil interactionCisplatinPlatinol-AQ
How Cisplatin interacts with GPLC Carnitine 60 mg — through 1 ingredient. Tap an ingredient for the detail:
Coenzyme Q10Alkylating Agents Moderate
Interaction Summary
Coenzyme Q10 has antioxidant effects.
Read the full Coenzyme Q10 + Cisplatin interactionClozapineClozaril, Versacloz
How Clozapine interacts with GPLC Carnitine 60 mg — through 1 ingredient. Tap an ingredient for the detail:
GlycineClozapine (clozaril) Moderate
Interaction Summary
Theoretically, glycine might decrease the effectiveness of clozapine.
Read the full Glycine + Clozapine interactionConjugated EstrogensCenestin, Enjuvia, Premarin, Premarin Vaginal Cream
How Conjugated Estrogens interacts with GPLC Carnitine 60 mg — through 1 ingredient. Tap an ingredient for the detail:
Propionyl-l-carnitineThyroid Hormone Moderate
Interaction Summary
Theoretically, acetyl-L-carnitine might decrease the effectiveness of thyroid hormone replacement.
Read the full Propionyl-l-carnitine + Conjugated Estrogens interactionCyclophosphamideCytoxan, Neosar
How Cyclophosphamide interacts with GPLC Carnitine 60 mg — through 1 ingredient. Tap an ingredient for the detail:
Coenzyme Q10Alkylating Agents Moderate
Interaction Summary
Coenzyme Q10 has antioxidant effects.
Read the full Coenzyme Q10 + Cyclophosphamide interactionDacarbazineDTIC-Dome
How Dacarbazine interacts with GPLC Carnitine 60 mg — through 1 ingredient. Tap an ingredient for the detail:
Coenzyme Q10Alkylating Agents Moderate
Interaction Summary
Coenzyme Q10 has antioxidant effects.
Read the full Coenzyme Q10 + Dacarbazine interactionDesiccated Thyroid ExtractWesthroid, WP Thyroid
How Desiccated Thyroid Extract interacts with GPLC Carnitine 60 mg — through 1 ingredient. Tap an ingredient for the detail:
Propionyl-l-carnitineThyroid Hormone Moderate
Interaction Summary
Theoretically, acetyl-L-carnitine might decrease the effectiveness of thyroid hormone replacement.
Read the full Propionyl-l-carnitine + Desiccated Thyroid Extract interactionDesiccated Thyroid Extract (prescription Drug)Nature-Throid, Thyrar
How Desiccated Thyroid Extract (prescription Drug) interacts with GPLC Carnitine 60 mg — through 1 ingredient. Tap an ingredient for the detail:
Propionyl-l-carnitineThyroid Hormone Moderate
Interaction Summary
Theoretically, acetyl-L-carnitine might decrease the effectiveness of thyroid hormone replacement.
Read the full Propionyl-l-carnitine + Desiccated Thyroid Extract (prescription Drug) interactionDextrothyroxineCholoxin
How Dextrothyroxine interacts with GPLC Carnitine 60 mg — through 1 ingredient. Tap an ingredient for the detail:
Propionyl-l-carnitineThyroid Hormone Moderate
Interaction Summary
Theoretically, acetyl-L-carnitine might decrease the effectiveness of thyroid hormone replacement.
Read the full Propionyl-l-carnitine + Dextrothyroxine interactionEstramustine Phosphate SodiumEmcyt
How Estramustine Phosphate Sodium interacts with GPLC Carnitine 60 mg — through 1 ingredient. Tap an ingredient for the detail:
Coenzyme Q10Alkylating Agents Moderate
Interaction Summary
Coenzyme Q10 has antioxidant effects.
Read the full Coenzyme Q10 + Estramustine Phosphate Sodium interactionHuman Chorionic Gonadotropin (hcg)Pregnyl
How Human Chorionic Gonadotropin (hcg) interacts with GPLC Carnitine 60 mg — through 1 ingredient. Tap an ingredient for the detail:
Propionyl-l-carnitineThyroid Hormone Moderate
Interaction Summary
Theoretically, acetyl-L-carnitine might decrease the effectiveness of thyroid hormone replacement.
Read the full Propionyl-l-carnitine + Human Chorionic Gonadotropin (hcg) interactionIfosfamideIfex
How Ifosfamide interacts with GPLC Carnitine 60 mg — through 1 ingredient. Tap an ingredient for the detail:
Coenzyme Q10Alkylating Agents Moderate
Interaction Summary
Coenzyme Q10 has antioxidant effects.
Read the full Coenzyme Q10 + Ifosfamide interactionLevothyroxineEltroxin, Estre, Euthyrox, Levo-T, Levolet, Levothroid +5 more
How Levothyroxine interacts with GPLC Carnitine 60 mg — through 1 ingredient. Tap an ingredient for the detail:
Propionyl-l-carnitineThyroid Hormone Moderate
Interaction Summary
Theoretically, acetyl-L-carnitine might decrease the effectiveness of thyroid hormone replacement.
Read the full Propionyl-l-carnitine + Levothyroxine interactionLevothyroxine SodiumErmez, Thyquidity, Tirosint-Sol
How Levothyroxine Sodium interacts with GPLC Carnitine 60 mg — through 1 ingredient. Tap an ingredient for the detail:
Propionyl-l-carnitineThyroid Hormone Moderate
Interaction Summary
Theoretically, acetyl-L-carnitine might decrease the effectiveness of thyroid hormone replacement.
Read the full Propionyl-l-carnitine + Levothyroxine Sodium interactionLevothyroxine, LiothyronineArmour Thyroid
How Levothyroxine, Liothyronine interacts with GPLC Carnitine 60 mg — through 1 ingredient. Tap an ingredient for the detail:
Propionyl-l-carnitineThyroid Hormone Moderate
Interaction Summary
Theoretically, acetyl-L-carnitine might decrease the effectiveness of thyroid hormone replacement.
Read the full Propionyl-l-carnitine + Levothyroxine, Liothyronine interactionLiothyronineCytomel
How Liothyronine interacts with GPLC Carnitine 60 mg — through 1 ingredient. Tap an ingredient for the detail:
Propionyl-l-carnitineThyroid Hormone Moderate
Interaction Summary
Theoretically, acetyl-L-carnitine might decrease the effectiveness of thyroid hormone replacement.
Read the full Propionyl-l-carnitine + Liothyronine interactionLiotrixEuthroid 1, Euthroid 1/2, Euthroid 3
How Liotrix interacts with GPLC Carnitine 60 mg — through 1 ingredient. Tap an ingredient for the detail:
Propionyl-l-carnitineThyroid Hormone Moderate
Interaction Summary
Theoretically, acetyl-L-carnitine might decrease the effectiveness of thyroid hormone replacement.
Read the full Propionyl-l-carnitine + Liotrix interactionLiotrix, T4/t3Euthroid 2
How Liotrix, T4/t3 interacts with GPLC Carnitine 60 mg — through 1 ingredient. Tap an ingredient for the detail:
Propionyl-l-carnitineThyroid Hormone Moderate
Interaction Summary
Theoretically, acetyl-L-carnitine might decrease the effectiveness of thyroid hormone replacement.
Read the full Propionyl-l-carnitine + Liotrix, T4/t3 interactionLomustineCeenu
How Lomustine interacts with GPLC Carnitine 60 mg — through 1 ingredient. Tap an ingredient for the detail:
Coenzyme Q10Alkylating Agents Moderate
Interaction Summary
Coenzyme Q10 has antioxidant effects.
Read the full Coenzyme Q10 + Lomustine interactionLurbinectedinZepzelca
How Lurbinectedin interacts with GPLC Carnitine 60 mg — through 1 ingredient. Tap an ingredient for the detail:
Coenzyme Q10Alkylating Agents Moderate
Interaction Summary
Coenzyme Q10 has antioxidant effects.
Read the full Coenzyme Q10 + Lurbinectedin interactionMechlorethamine HydrochlorideValchlor
How Mechlorethamine Hydrochloride interacts with GPLC Carnitine 60 mg — through 1 ingredient. Tap an ingredient for the detail:
Coenzyme Q10Alkylating Agents Moderate
Interaction Summary
Coenzyme Q10 has antioxidant effects.
Read the full Coenzyme Q10 + Mechlorethamine Hydrochloride interactionMelphalanAlkeran, Hepzato
How Melphalan interacts with GPLC Carnitine 60 mg — through 1 ingredient. Tap an ingredient for the detail:
Coenzyme Q10Alkylating Agents Moderate
Interaction Summary
Coenzyme Q10 has antioxidant effects.
Read the full Coenzyme Q10 + Melphalan interactionMelphalan FlufenamidePepaxto
How Melphalan Flufenamide interacts with GPLC Carnitine 60 mg — through 1 ingredient. Tap an ingredient for the detail:
Coenzyme Q10Alkylating Agents Moderate
Interaction Summary
Coenzyme Q10 has antioxidant effects.
Read the full Coenzyme Q10 + Melphalan Flufenamide interactionEach ingredient & the kinds of drugs it affects
For each ingredient in GPLC Carnitine 60 mg with known interactions, here are the types of medications they can affect. Open any type for the detail — or search your exact drug in the checker above.
Coenzyme Q10
Alkylating Agents
Coenzyme Q10 has antioxidant effects. Theoretically, this may reduce the activity of chemotherapy drugs that generate free radicals.
Theoretically, antioxidants such as coenzyme Q10 might protect tumor cells from chemotherapeutic agents that work by inducing oxidative stress, such as alkylating agents (e.g., cyclophosphamide) and radiation therapy. The clinical importance of this interaction is unknown.
Warfarin (Coumadin)
Coenzyme Q10 is chemically similar to menaquinone and might have vitamin K-like procoagulant effects, which could decrease the effects of warfarin.
Concomitant use of coenzyme Q10 and warfarin might reduce the anticoagulant effects of warfarin. Four cases of decreased warfarin efficacy thought to be due to coenzyme Q10 have been reported. However, there is some preliminary clinical research that suggests coenzyme Q10 might not significantly decrease the effects of warfarin in patients who have a stable INR.
Antihypertensive Drugs
Theoretically, coenzyme Q10 might have additive effects with antihypertensive drugs.
Some clinical research shows that coenzyme Q10 can significantly lower blood pressure, although other studies have shown conflicting results.
Propionyl-L-Carnitine
Acenocoumarol (Sintrom)
Theoretically, propionyl-L-carnitine might increase the anticoagulant effects of acenocoumarol.
L-carnitine, the parent compound of propionyl-L-carnitine, might enhance the anticoagulant effects of acenocoumarol, an oral anticoagulant 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 propionyl-L-carnitine.
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 propionyl-L-carnitine.
Warfarin (Coumadin)
Theoretically, propionyl-L-carnitine might increase the anticoagulant effects of warfarin.
L-carnitine, the parent compound of propionyl-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 propionyl-L-carnitine and warfarin.
Glycine
Clozapine (Clozaril)
Theoretically, glycine might decrease the effectiveness of clozapine.
One small clinical study in patients with schizophrenia shows that adding glycine to clozapine therapy worsens symptoms of schizophrenia when compared with clozapine alone. The mechanism of this interaction is unclear.
Brand information
Manufacturer and brand details for GPLC Carnitine 60 mg, from the product label.
Physician's Preference
See all Physician's Preference products- Name
- Physician's Preference(R)
- Street Address
- 20214 Braidwood Dr., Ste. 160
- City
- Katy
- State
- TX
- ZipCode
- 77450
- Phone Number
- 1 (800) 579-6545
- Web Address
- www.physicianspreference.com
GPLC Carnitine 60 mg by Physician's Preference: Common Questions
Does GPLC Carnitine 60 mg by Physician's Preference interact with any medications?
How can one product interact with so many drugs?
Where does this information come from?
What is GPLC?
Does this product actually work for heart health?
What are the most common side effects?
Can I take this if I'm pregnant?
Is it safe to breastfeed while taking this?
Written and reviewed by the HelloPharmacist editorial staff. Our editorial policy
Not sure if GPLC Carnitine 60 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 GPLC Carnitine 60 mg’s Ingredients
Every ingredient we hold a full HelloPharmacist monograph for — uses, evidence, safety, and the complete interaction list.
Coenzyme Q10
Interacts with 198 drugsCoQ10 is a vitamin-like substance your body makes naturally that helps cells produce energy and acts as an antioxidant. It is generally well tolerated and is most studied for heart condition...
Read the full Coenzyme Q10 monograph → Herb & supplement monographGlycine
Interacts with 1 drugGlycine is a non-essential amino acid your body makes on its own and that also appears in protein-rich foods. It is most studied for improving sleep quality, where early research is promisin...
Read the full Glycine monograph → Herb & supplement monographPropionyl-l-carnitine
Interacts with 19 drugsPropionyl-l-carnitine is a form of the amino acid derivative carnitine that the body uses to help turn fat into energy, and it is studied mostly for circulation problems like peripheral arte...
Read the full Propionyl-l-carnitine monograph →Sources & How We Checked
GPLC Carnitine 60 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 57 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.
Glycine 5 references
- Heresco-Levy U, Javitt DC, Ermilov M, et al. Efficacy of high-dose glycine in the treatment of enduring negative symptoms of schizophrenia. Arch Gen Psychiatry 1999;56:29-36.. PubMed
- Potkin SG, Jin Y, Bunney BG, Costa J, Gulasekaram B. Effect of clozapine and adjunctive high-dose glycine in treatment-resistant schizophrenia. Am J Psychiatry 1999;156:145-7.. PubMed
- Gusev EI, Skvortsova VI, Dambinova SA, et al. Neuroprotective effects of glycine for therapy of acute ischaemic stroke. Cerebrovasc Dis 2000;10:49-60. PubMed
- Inagawa K, Kawai N, Ono K, Sukegawa E, Tsubuku S, Takahashi M. Assessment of acute adverse effects of glycine ingestion at a high dose in human volunteers. Seikatsu Eisei. 2006; 50:27-32.
- Woods SW, Walsh BC, Hawkins KA, Miller TJ, Saksa JR, D'Souza DC, Pearlson GD, Javitt DC, McGlashan TH, Krystal JH. Glycine treatment of the risk syndrome for psychosis: report of two pilot studies. Eur Neuropsychopharmacol. 2013 Aug;23(8):931-40. PubMed
Coenzyme Q10 40 references
- Kamikawa T, Kobayashi A, Yamashita T, et al. Effects of coenzyme Q10 on exercise tolerance in chronic stable angina pectoris. Am J Cardiol 1985;56:247-51. PubMed
- Langsjoen P, Willis R, Folkers K. Treatment of essential hypertension with coenzyme Q10. Mol Aspects Med 1994;S265-72. PubMed
- Spigset O. Reduced effect of warfarin caused by ubidecarenone. Lancet 1994;334:1372-3. PubMed
- Singh RB, Niaz MA, Rastogi SS, et al. Effect of hydrosoluble coenzyme Q10 on blood pressures and insulin resistance in hypertensive patients with coronary artery disease. J Hum Hypertens 1999;13:203-8. PubMed
- Portakal O, Ozkaya O, Erden Inal M, et al. Coenzyme Q10 concentrations and antioxidant status in tissues of breast cancer patients. Clin Biochem 2000;33:279-84. PubMed
- Lund EL, Quistorff B, Spang-Thomsen M, Kristjansen PE. Effect of radiation therapy on small-cell lung cancer is reduced by ubiquinone intake. Folia Microbiol (Praha) 1998;43:505-6. PubMed
- Langsjoen PH, Langsjoen PH, Folkers K. Long-term efficacy and safety of coenzyme Q10 therapy for idiopathic dilated cardiomyopathy. Am J Cardiol 1990;65:521-3. PubMed
- Heck AM, DeWitt BA, Lukes AL. Potential interactions between alternative therapies and warfarin. Am J Health Syst Pharm 2000;57:1221-7. DOI
- Landbo C, Almdal TP. [Interaction between warfarin and coenzyme Q10]. Ugeskr Laeger 1998;160:3226-7.
- Baggio E, Gandini R, Plauncher AC, et al. Italian multicenter study on the safety and efficacy of coenzyme Q10 as adjunctive therapy in heart failure. CoQ10 Drug Surveillance Investigators. Mol Aspects Med 1994;15 Suppl:S287-94. PubMed
- Burke BE, Neuenschwander R, Olson RD. Randomized, double-blind, placebo-controlled trial of coenzyme Q10 in isolated systolic hypertension. South Med J 2001;94:1112-7. PubMed
- The Huntington Study Group. A randomized, placebo-controlled trial of coenzyme Q10 and remacemide in Huntington's disease. Neurology 2001;57:397-404.
- Hodgson JM, Watts GF, Playford DA, et al. Coenzyme Q10 improves blood pressure and glycaemic control: a controlled trial in subjects with type 2 diabetes. Eur J Clin Nutr 2002;56:1137-42. PubMed
- Singh RB, Neki NS, Kartikey K, et al. Effect of coenzyme Q10 on risk of atherosclerosis in patients with recent myocardial infarction. Mol Cell Biochem 2003;246:75-82. DOI
- Porterfield LM. Why did the response to warfarin change? RN 2000;63:107.
- Sandor PS, Di Clemente L, Coppola G, et al. Efficacy of coenzyme Q10 in migraine prophylaxis: A randomized controlled trial. Neurology 2005;64:713-5. PubMed
- Engelsen J, Nielsen JD, Winther K. Effect of coenzyme Q10 and Ginkgo biloba on warfarin dosage in stable, long-term warfarin treated outpatients. A randomised, double blind, placebo-crossover trial. Thromb Haemost 2002;87:1075-6. DOI
- Berman M, Erman A, Ben-Gal T, et al. Coenzyme Q10 in patients with end-stage heart failure awaiting cardiac transplantation: a randomized, placebo-controlled study. Clin Cardiol 2004;27:295–9. PubMed
- Storch A, Jost WH, Vieregge P, et al. Randomized, double-blind, placebo-controlled trial on symptomatic effects of coenzyme Q10 in Parkinson disease. Arch Neurol 2007;64:938-44. DOI
- Digiesi V, Cantini F, Oradei A, et al. Coenzyme Q10 in essential hypertension. Mol Aspects Med 1994;15 Suppl:s257-63. PubMed
- Yamagami T, Takagi M, Akagami H, et al. Effect of coenzyme Q10 on essential hypertension, a double blind controlled study. In: Folkers KA, Yamamura Y, eds. Biomedical and Clinical Aspects of Coenzyme Q, Vol. 5. Amsterdam: Elsevier Science Publications, 19
- Ho MJ, Bellusci A, Wright JM. Blood pressure lowering efficacy of coenzyme Q10 for primary hypertension (review). Cochrane Database Syst Rev 2009;(4):CD007435. PubMed
- Rosenfeldt, F. L., Haas, S. J., Krum, H., Hadj, A., Ng, K., Leong, J. Y., and Watts, G. F. Coenzyme Q10 in the treatment of hypertension: a meta-analysis of the clinical trials. J Hum.Hypertens. 2007;21(4):297-306. PubMed
- Stamelou, M., Reuss, A., Pilatus, U., Magerkurth, J., Niklowitz, P., Eggert, K. M., Krisp, A., Menke, T., Schade-Brittinger, C., Oertel, W. H., and Hoglinger, G. U. Short-term effects of coenzyme Q10 in progressive supranuclear palsy: a randomized, place DOI
- Keogh A, Fenton S, Leslie C, et al. Randomised double-blind, placebo-controlled trial of coenzyme Q, therapy in class II and III systolic heart failure. Heart Lung Circ. 2003;12:135-41.
- Gane, E. J., Weilert, F., Orr, D. W., Keogh, G. F., Gibson, M., Lockhart, M. M., Frampton, C. M., Taylor, K. M., Smith, R. A., and Murphy, M. P. The mitochondria-targeted anti-oxidant mitoquinone decreases liver damage in a phase II study of hepatitis C
- Lynch, D. R., Perlman, S. L., and Meier, T. A phase 3, double-blind, placebo-controlled trial of idebenone in friedreich ataxia. Arch Neurol. 2010;67(8):941-947. PubMed
- Young, J. M., Florkowski, C. M., Molyneux, S. L., McEwan, R. G., Frampton, C. M., Nicholls, M. G., Scott, R. S., and George, P. M. A randomized, double-blind, placebo-controlled crossover study of coenzyme Q10 therapy in hypertensive patients with the me
- Ishiyama, T., Morita, Y., Toyama, S., Yamagami, T., and Tsukamoto, N. A clinical study of the effect of coenzyme Q on congestive heart failure. Jpn.Heart J 1976;17(1):32-42. PubMed
- Matthews, P. M., Ford, B., Dandurand, R. J., Eidelman, D. H., O'Connor, D., Sherwin, A., Karpati, G., Andermann, F., and Arnold, D. L. Coenzyme Q10 with multiple vitamins is generally ineffective in treatment of mitochondrial disease. Neurology 1993;43(5
- Malm, C., Svensson, M., Sjoberg, B., Ekblom, B., and Sjodin, B. Supplementation with ubiquinone-10 causes cellular damage during intense exercise. Acta Physiol Scand. 1996;157(4):511-512. PubMed
- Singh, R. B., Wander, G. S., Rastogi, A., Shukla, P. K., Mittal, A., Sharma, J. P., Mehrotra, S. K., Kapoor, R., and Chopra, R. K. Randomized, double-blind placebo-controlled trial of coenzyme Q10 in patients with acute myocardial infarction. Cardiovasc. PubMed
- Digiesi V, Cantini F, and Brodbeck B. Effect of coenzyme Q10 on essential arterial hypertension. Current Therapeutic Research 1990;47(5):841-845.
- Parkinson Study Group QE3 Investigators, Beal MF, Oakes D, et al. A randomized clinical trial of high-dosage coenzyme Q10 in early Parkinson disease: no evidence of benefit. JAMA Neurol. 2014;71(5):543-52.
- Alehagen U, Johansson P, Bjornstedt M, et al. Cardiovascular mortality and N-terminal-proBNP reduced after combined selenium and coenzyme Q10 supplementation: A 5-year prospective randomized double-blind placebo-controlled trial among elderly Swedish citi
- Ho MJ, Li EC, Wright JM. Blood pressure lowering efficacy of coenzyme Q10 for primary hypertension. Cochrane Database Syst Rev. 2016 Mar 3;3:CD007435. doi: 10.1002/14651858.CD007435.pub3. PubMed
- Tabrizi R, Akbari M, Sharifi N, Lankarani KB, Moosazadeh M, Kolahdooz F, et al. The effects of coenzyme Q10 supplementation on blood pressures among patients with metabolic diseases: a systematic review and meta-analysis of randomized controlled trials. PubMed
- Tsai IC, Hsu CW, Chang CH, Tseng PT, Chang KV. Effectiveness of coenzyme Q10 supplementation for reducing fatigue: A systematic review and meta-analysis of randomized controlled trials. Front Pharmacol 2022;13:883251. PubMed
- Yaghini O, Hoseini N, Ghazavi MR, et al. A comparative study on the efficacy of coenzyme Q10 and amitriptyline in the prophylactic treatment of migraine headaches in children: A randomized controlled trial. Adv Biomed Res 2022;11:43. PubMed
- Hansen KS, Mogensen TH, Agergaard J, et al. High-dose coenzyme Q10 therapy versus placebo in patients with post COVID-19 condition: A randomized, phase 2, crossover trial. Lancet Reg Health Eur 2022. PubMed
Propionyl-l-carnitine 12 references
- Cherchi A, Lai C, Onnis E, et al. Propionyl carnitine in stable effort angina. Cardiovasc Drugs Ther 1990;4:481-6. PubMed
- Bartels GL, Remme WJ, den Hartog FR, et al. Additional anti-ischemic effects of long-term L-propionylcarnitine in anginal patients treated with conventional antianginal therapy. Cardiovasc Drugs Ther 1995;9:749-53.
- Caponnetto S, Canale C, Masperone MA, et al. Efficacy of L-propionylcarnitine treatment in patients with left ventricular dysfunction. Eur Heart J 1994;15:1267-73. 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
- Martinez E, Domingo P, Roca-Cusachs A. Potentiation of acenocoumarol action by L-carnitine. J Intern Med 1993;233:94.
- Bachmann HU, Hoffmann A. Interaction of food supplement L-carnitine with oral anticoagulant acenocoumarol. Swiss Med Wkly 2004;134:385. PubMed
- Gentile V, Vicini P, Prigiotti G, et al. Preliminary observations on the use of propionyl-L-carnitine in combination with sildenafil in patients with erectile dysfunction and diabetes. Curr Med Res Opin 2004;20:1377-84. 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
- Brass EP, Koster D, Hiatt WR, Amato A. A systematic review and meta-analysis of propionyl-L-carnitine effects on exercise performance in patients with claudication. Vasc Med 2013;18:3-12.
- Hiatt WR, Creager MA, Amato A, Brass EP. Effect of propionyl-L-carnitine on a background of monitored exercise in patients with claudication secondary to peripheral artery disease. J Cardiopulm Rehabil Prev 2011;31:125-32. PubMed
- Jacobs PL, Goldstein ER, Blackburn W, et al. Glycine propionyl-L-carnitine produces enhanced anaerobic work capacity with reduced lactate accumulation in resistance trained males. J Int Soc Sports Nutr 2009;6:9. PubMed
- Jacobs PL, Goldstein ER. Long-term glycine propionyl-l-carnitine supplementation and paradoxical effects on repeated anaerobic sprint performance. J Int Soc Sports Nutr 2010;7:35.
See these in context on the Propionyl-l-carnitine 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