Glycine & NAC Ingredients & Drug Interactions
by DoNotAge.org
What is this page for?
First and foremost: checking Glycine & NAC 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
Glycine & NAC is a dietary supplement by DoNotAge.org with 2 active ingredients. Its ingredients are commonly taken for sleep quality and insomnia, relaxation, cognitive function.Based on those ingredients, 295 medications have a known interaction with it, the most serious rated major. The ingredients most likely to interact are N-Acetyl Cysteine, Glycine. Use the checker below to test your specific medication, or read the full HelloPharmacist Interaction Report.
Check Your Meds Against Glycine & NAC by DoNotAge.org
Ask about any prescription or over-the-counter medication and we check it for interactions with Glycine & NAC by DoNotAge.org — 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 Glycine & NAC by DoNotAge.org
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 contains 2 active ingredients: glycine and N-acetyl cysteine (NAC). Glycine is an amino acid, and NAC is a modified form of the amino acid cysteine.
The capsule also contains cellulose as an inactive ingredient.
Does it work?
Strong evidence
Glycine is possibly effective for schizophrenia based on the evidence we have. For other conditions we hold data on — 3-phosphoglycerate dehydrogenase (3-PGDH) deficiency, attention-deficit/hyperactivity disorder (ADHD), benign prostatic hyperplasia (BPH), and cystic fibrosis — the evidence is insufficient to rate it.
NAC is effective for acetaminophen (Tylenol) poisoning, atelectasis (collapsed lung tissue), and as a diagnostic aid in bronchial studies and tracheostomy care. It's possibly effective for bronchitis.
If you're considering this product for any other use, we'd need to know what condition you're targeting, because the data we hold doesn't establish its effectiveness for most other purposes.
How safe is it?
Well-documented data
Both glycine and NAC are generally well tolerated at typical doses, but long-term safety data for glycine are limited. Mild side effects with glycine have included rare sedation, irritability, insomnia, fatigue, memory problems, headache, soft stools, nausea, vomiting, and upper stomach discomfort — all resolving quickly if you stop the supplement.
For NAC, the most common side effects at normal doses are diarrhea, dry mouth, heartburn, nausea, and vomiting when taken by mouth. Joint pain was reported in more than 15% of patients in one trial.
We don't have reliable safety data on either ingredient during pregnancy, so talk with your doctor or pharmacist before using this product if you're pregnant or breastfeeding.
Meds to double-check
Major interaction found
Check with your pharmacist before using this product if you take nitroglycerin (Major interaction), blood pressure medications, blood thinners or antiplatelet drugs, clozapine (Clozaril), chloroquine, or activated charcoal (all Moderate interactions). The nitroglycerin interaction is the most serious — it can cause dangerous drops in blood pressure.
The bottom line
Scorecard at a glanceFully disclosed formula with strong clinical evidence behind its ingredients' uses. Major medication interactions have been identified, and safety information is well characterized.
If you take nitroglycerin, blood pressure medications, blood thinners, clozapine, chloroquine, or activated charcoal, check this product with your pharmacist or doctor first — the interactions are real and could affect how your medications work or cause side effects. Otherwise, Glycine & NAC is generally tolerable, though we'd recommend confirming it's right for your specific reason for taking it.
Educational only — not medical advice; always confirm with your pharmacist. Our editorial policy · How we use AI
Assessment coverage: 2 of 2 active ingredients matched to our full ingredient reviews (monographs). Based on the product label dated Sep 25, 2024.
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 Glycine & NAC, straight from the product label.
| Brand | DoNotAge.org |
|---|---|
| Net contents | 60 Capsule(s) |
| Market status | On market |
| Date entered into DSLD | Sep 25, 2024 |
| DSLD ID | 315489 |
| Product type | Other Combinations |
| Supplement form | Capsule |
| Dietary claims / uses | All Other |
| Intended target group(s) | 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 Glycine & NAC by DoNotAge.org, sourced from the NIH Dietary Supplement Label Database.
Supplement Facts
| Ingredient | Amount | % DV |
|---|---|---|
| Glycine | 600 mg | -- |
| N-Acetyl Cysteine | 600 mg | -- |
Other ingredients: Cellulose
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
Total e36g
Suggested/Recommended/Usage/Directions
Directions Take 2 capsules on an empty stomach in the middle of the day.
Precautions
Warning Pregnant or nursing mothers, children under the age of 18 and individuals with a known medical condition should consult a physician before using
Pregnant or nursing mothers, children under the age of 18 and individuals with a known medical condition should consult a physician before using
Storage
Store in a cool, dry place
Seals/Symbols
GMP Good Manufacturing Practice Quality Guarantee Product of UK
FDA Statement of Identity
Dietary Supplement
Formulation
Contains no artificial ingredients, wheat, gluten, yeast, soy, corn, milk or preservatives
Is this label outdated? Report a formula or label change and our pharmacy team will review it.
Glycine & NAC by DoNotAge.org 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 Glycine & NAC by DoNotAge.org
These are the 2 active ingredients this product is made of. Select any to open its full monograph.
Serving size2 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.
Glycine
Interacts with1 drug
Glycine 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 q...
Glycine monograph & interactionsN-Acetyl Cysteine
Interacts with294 drugs
N-acetyl cysteine (NAC) is a supplement form of the amino acid cysteine and a building block for the antioxidant glutathione. It has well-established...
N-Acetyl Cysteine monograph & interactionsOther (inactive) ingredients: Cellulose. These complete the product’s ingredient list but are not active constituents.
Glycine & NAC by DoNotAge.org Drug Interactions
HelloPharmacist Interaction Report
Glycine & NAC by DoNotAge.org does contain ingredients with documented interactions with medications.
The most serious concern is N-acetyl cysteine (NAC) with nitroglycerin — a Major interaction. If you take nitroglycerin intravenously or through a patch, adding NAC can cause dangerous drops in blood pressure and severe headaches.
Read the full breakdown — every affected drug type, severity by severity
NAC also has Moderate interactions with blood pressure medications (antihypertensives), blood thinners and antiplatelet drugs, chloroquine (an antimalarial), and activated charcoal. It can lower blood pressure further when combined with blood pressure drugs, increase bleeding risk with anticoagulants, reduce how well chloroquine works, and interfere with each other's absorption if you're taking activated charcoal.
Glycine carries a Moderate interaction with clozapine (Clozaril), an antipsychotic. One small study found that adding glycine to clozapine made schizophrenia symptoms worse, though the reason isn't fully understood.
Altogether, these interactions span 293 individual medications. If you take any prescription medication, especially for blood pressure, heart conditions, blood clotting, or mental health, run it through the checker below before starting this product.
Check your own medications below · Editorial policy · How we use AI
Want to check YOUR meds against Glycine & NAC?
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 Glycine & NAC interact with 295 drugs. Click any drug to see the details.
2 of the 2 ingredients in Glycine & NAC interact with drugs. Each result below shows which ingredient is responsible. N-Acetyl Cysteine Glycine
NitroglycerinGonitro, Nitro Time, Nitro-Bid, Nitrocine Timecaps, Nitrogard, Nitrogard SR +7 more
How Nitroglycerin interacts with Glycine & NAC — through 1 ingredient. Tap an ingredient for the detail:
N-acetyl CysteineNitroglycerin Major
Interaction Summary
N-acetyl cysteine can increase the risk for hypotension and headaches when taken with intravenous or transdermal nitroglycerin.
Read the full N-acetyl Cysteine + Nitroglycerin interactionAbciximabReoPro
How Abciximab interacts with Glycine & NAC — through 1 ingredient. Tap an ingredient for the detail:
N-acetyl CysteineAnticoagulant/antiplatelet Drugs Moderate
Interaction Summary
Theoretically, N-acetyl cysteine might increase the risk of bleeding when taken with anticoagulant or antiplatelet drugs.
Read the full N-acetyl Cysteine + Abciximab interactionAbrocitinibCibinqo
How Abrocitinib interacts with Glycine & NAC — through 1 ingredient. Tap an ingredient for the detail:
N-acetyl CysteineAnticoagulant/antiplatelet Drugs Moderate
Interaction Summary
Theoretically, N-acetyl cysteine might increase the risk of bleeding when taken with anticoagulant or antiplatelet drugs.
Read the full N-acetyl Cysteine + Abrocitinib interactionAcebutololRhotral, Sectral
How Acebutolol interacts with Glycine & NAC — through 1 ingredient. Tap an ingredient for the detail:
N-acetyl CysteineAntihypertensive Drugs Moderate
Interaction Summary
Theoretically, N-acetyl cysteine might increase the risk of hypotension when taken with antihypertensive drugs.
Read the full N-acetyl Cysteine + Acebutolol interactionAcenocoumarolSintrom
How Acenocoumarol interacts with Glycine & NAC — through 1 ingredient. Tap an ingredient for the detail:
N-acetyl CysteineAnticoagulant/antiplatelet Drugs Moderate
Interaction Summary
Theoretically, N-acetyl cysteine might increase the risk of bleeding when taken with anticoagulant or antiplatelet drugs.
Read the full N-acetyl Cysteine + Acenocoumarol interactionAcetaminophen, AspirinGemnisyn
How Acetaminophen, Aspirin interacts with Glycine & NAC — through 1 ingredient. Tap an ingredient for the detail:
N-acetyl CysteineAnticoagulant/antiplatelet Drugs Moderate
Interaction Summary
Theoretically, N-acetyl cysteine might increase the risk of bleeding when taken with anticoagulant or antiplatelet drugs.
Read the full N-acetyl Cysteine + Acetaminophen, Aspirin interactionAcetaminophen, Aspirin, CaffeineExcedrin, Excedrin Extra Strength, Excedrin Migraine
How Acetaminophen, Aspirin, Caffeine interacts with Glycine & NAC — through 1 ingredient. Tap an ingredient for the detail:
N-acetyl CysteineAnticoagulant/antiplatelet Drugs Moderate
Interaction Summary
Theoretically, N-acetyl cysteine might increase the risk of bleeding when taken with anticoagulant or antiplatelet drugs.
Read the full N-acetyl Cysteine + Acetaminophen, Aspirin, Caffeine interactionAcetaminophen, IbuprofenCombogesic
How Acetaminophen, Ibuprofen interacts with Glycine & NAC — through 1 ingredient. Tap an ingredient for the detail:
N-acetyl CysteineAnticoagulant/antiplatelet Drugs Moderate
Interaction Summary
Theoretically, N-acetyl cysteine might increase the risk of bleeding when taken with anticoagulant or antiplatelet drugs.
Read the full N-acetyl Cysteine + Acetaminophen, Ibuprofen interactionAcetazolamideAk-Zol, Diamox
How Acetazolamide interacts with Glycine & NAC — through 1 ingredient. Tap an ingredient for the detail:
N-acetyl CysteineAntihypertensive Drugs Moderate
Interaction Summary
Theoretically, N-acetyl cysteine might increase the risk of hypotension when taken with antihypertensive drugs.
Read the full N-acetyl Cysteine + Acetazolamide interactionAcetylsalicylic AcidEntrophen
How Acetylsalicylic Acid interacts with Glycine & NAC — through 1 ingredient. Tap an ingredient for the detail:
N-acetyl CysteineAnticoagulant/antiplatelet Drugs Moderate
Interaction Summary
Theoretically, N-acetyl cysteine might increase the risk of bleeding when taken with anticoagulant or antiplatelet drugs.
Read the full N-acetyl Cysteine + Acetylsalicylic Acid interactionAliskirenTekturna
How Aliskiren interacts with Glycine & NAC — through 1 ingredient. Tap an ingredient for the detail:
N-acetyl CysteineAntihypertensive Drugs Moderate
Interaction Summary
Theoretically, N-acetyl cysteine might increase the risk of hypotension when taken with antihypertensive drugs.
Read the full N-acetyl Cysteine + Aliskiren interactionAlteplase, TpaActilyse, Activase
How Alteplase, Tpa interacts with Glycine & NAC — through 1 ingredient. Tap an ingredient for the detail:
N-acetyl CysteineAnticoagulant/antiplatelet Drugs Moderate
Interaction Summary
Theoretically, N-acetyl cysteine might increase the risk of bleeding when taken with anticoagulant or antiplatelet drugs.
Read the full N-acetyl Cysteine + Alteplase, Tpa interactionAluminum Hydroxide, Aspirin, Codeine Phosphate, Magnesium HydroxideAscriptin Codeine #2
How Aluminum Hydroxide, Aspirin, Codeine Phosphate, Magnesium Hydroxide interacts with Glycine & NAC — through 1 ingredient. Tap an ingredient for the detail:
N-acetyl CysteineAnticoagulant/antiplatelet Drugs Moderate
Interaction Summary
Theoretically, N-acetyl cysteine might increase the risk of bleeding when taken with anticoagulant or antiplatelet drugs.
Read the full N-acetyl Cysteine + Aluminum Hydroxide, Aspirin, Codeine Phosphate, Magnesium Hydroxide interactionAluminum Hydroxide, Aspirin, Magnesium HydroxideAscriptin
How Aluminum Hydroxide, Aspirin, Magnesium Hydroxide interacts with Glycine & NAC — through 1 ingredient. Tap an ingredient for the detail:
N-acetyl CysteineAnticoagulant/antiplatelet Drugs Moderate
Interaction Summary
Theoretically, N-acetyl cysteine might increase the risk of bleeding when taken with anticoagulant or antiplatelet drugs.
Read the full N-acetyl Cysteine + Aluminum Hydroxide, Aspirin, Magnesium Hydroxide interactionAmbrisentanLetairis, Volibris
How Ambrisentan interacts with Glycine & NAC — through 1 ingredient. Tap an ingredient for the detail:
N-acetyl CysteineAntihypertensive Drugs Moderate
Interaction Summary
Theoretically, N-acetyl cysteine might increase the risk of hypotension when taken with antihypertensive drugs.
Read the full N-acetyl Cysteine + Ambrisentan interactionAmilorideAmilamont, Midamor
How Amiloride interacts with Glycine & NAC — through 1 ingredient. Tap an ingredient for the detail:
N-acetyl CysteineAntihypertensive Drugs Moderate
Interaction Summary
Theoretically, N-acetyl cysteine might increase the risk of hypotension when taken with antihypertensive drugs.
Read the full N-acetyl Cysteine + Amiloride interactionAmiloride, HydrochlorothiazideAmil-Co, Amilzide, Moduret 25, Moduretic
How Amiloride, Hydrochlorothiazide interacts with Glycine & NAC — through 1 ingredient. Tap an ingredient for the detail:
N-acetyl CysteineAntihypertensive Drugs Moderate
Interaction Summary
Theoretically, N-acetyl cysteine might increase the risk of hypotension when taken with antihypertensive drugs.
Read the full N-acetyl Cysteine + Amiloride, Hydrochlorothiazide interactionAmlodipineNorliqva
How Amlodipine interacts with Glycine & NAC — through 1 ingredient. Tap an ingredient for the detail:
N-acetyl CysteineAntihypertensive Drugs Moderate
Interaction Summary
Theoretically, N-acetyl cysteine might increase the risk of hypotension when taken with antihypertensive drugs.
Read the full N-acetyl Cysteine + Amlodipine interactionAmlodipine BenzoateKaterzia
How Amlodipine Benzoate interacts with Glycine & NAC — through 1 ingredient. Tap an ingredient for the detail:
N-acetyl CysteineAntihypertensive Drugs Moderate
Interaction Summary
Theoretically, N-acetyl cysteine might increase the risk of hypotension when taken with antihypertensive drugs.
Read the full N-acetyl Cysteine + Amlodipine Benzoate interactionAmlodipine BesilateIstin
How Amlodipine Besilate interacts with Glycine & NAC — through 1 ingredient. Tap an ingredient for the detail:
N-acetyl CysteineAntihypertensive Drugs Moderate
Interaction Summary
Theoretically, N-acetyl cysteine might increase the risk of hypotension when taken with antihypertensive drugs.
Read the full N-acetyl Cysteine + Amlodipine Besilate interactionAmlodipine BesylateNorvasc
How Amlodipine Besylate interacts with Glycine & NAC — through 1 ingredient. Tap an ingredient for the detail:
N-acetyl CysteineAntihypertensive Drugs Moderate
Interaction Summary
Theoretically, N-acetyl cysteine might increase the risk of hypotension when taken with antihypertensive drugs.
Read the full N-acetyl Cysteine + Amlodipine Besylate interactionAmlodipine Besylate, BenazeprilLotrel
How Amlodipine Besylate, Benazepril interacts with Glycine & NAC — through 1 ingredient. Tap an ingredient for the detail:
N-acetyl CysteineAntihypertensive Drugs Moderate
Interaction Summary
Theoretically, N-acetyl cysteine might increase the risk of hypotension when taken with antihypertensive drugs.
Read the full N-acetyl Cysteine + Amlodipine Besylate, Benazepril interactionAmlodipine, CelecoxibConsensi
How Amlodipine, Celecoxib interacts with Glycine & NAC — through 1 ingredient. Tap an ingredient for the detail:
N-acetyl CysteineAntihypertensive Drugs Moderate
Interaction Summary
Theoretically, N-acetyl cysteine might increase the risk of hypotension when taken with antihypertensive drugs.
Read the full N-acetyl Cysteine + Amlodipine, Celecoxib interactionAmmonium ChlorideAmmonium Chloride
How Ammonium Chloride interacts with Glycine & NAC — through 1 ingredient. Tap an ingredient for the detail:
N-acetyl CysteineAntihypertensive Drugs Moderate
Interaction Summary
Theoretically, N-acetyl cysteine might increase the risk of hypotension when taken with antihypertensive drugs.
Read the full N-acetyl Cysteine + Ammonium Chloride interactionAnacaulase-bcdbNexoBrid
How Anacaulase-bcdb interacts with Glycine & NAC — through 1 ingredient. Tap an ingredient for the detail:
N-acetyl CysteineAnticoagulant/antiplatelet Drugs Moderate
Interaction Summary
Theoretically, N-acetyl cysteine might increase the risk of bleeding when taken with anticoagulant or antiplatelet drugs.
Read the full N-acetyl Cysteine + Anacaulase-bcdb interactionAnagrelideAgrylin
How Anagrelide interacts with Glycine & NAC — through 1 ingredient. Tap an ingredient for the detail:
N-acetyl CysteineAnticoagulant/antiplatelet Drugs Moderate
Interaction Summary
Theoretically, N-acetyl cysteine might increase the risk of bleeding when taken with anticoagulant or antiplatelet drugs.
Read the full N-acetyl Cysteine + Anagrelide interactionAnisindioneMiradon
How Anisindione interacts with Glycine & NAC — through 1 ingredient. Tap an ingredient for the detail:
N-acetyl CysteineAnticoagulant/antiplatelet Drugs Moderate
Interaction Summary
Theoretically, N-acetyl cysteine might increase the risk of bleeding when taken with anticoagulant or antiplatelet drugs.
Read the full N-acetyl Cysteine + Anisindione interactionAntithrombin IiiThrombate III
How Antithrombin Iii interacts with Glycine & NAC — through 1 ingredient. Tap an ingredient for the detail:
N-acetyl CysteineAnticoagulant/antiplatelet Drugs Moderate
Interaction Summary
Theoretically, N-acetyl cysteine might increase the risk of bleeding when taken with anticoagulant or antiplatelet drugs.
Read the full N-acetyl Cysteine + Antithrombin Iii interactionApixabanEliquis
How Apixaban interacts with Glycine & NAC — through 1 ingredient. Tap an ingredient for the detail:
N-acetyl CysteineAnticoagulant/antiplatelet Drugs Moderate
Interaction Summary
Theoretically, N-acetyl cysteine might increase the risk of bleeding when taken with anticoagulant or antiplatelet drugs.
Read the full N-acetyl Cysteine + Apixaban interactionAprocitentanTryvio
How Aprocitentan interacts with Glycine & NAC — through 1 ingredient. Tap an ingredient for the detail:
N-acetyl CysteineAntihypertensive Drugs Moderate
Interaction Summary
Theoretically, N-acetyl cysteine might increase the risk of hypotension when taken with antihypertensive drugs.
Read the full N-acetyl Cysteine + Aprocitentan interactionEach ingredient & the kinds of drugs it affects
For each ingredient in Glycine & NAC 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.
N-Acetyl Cysteine
Nitroglycerin
N-acetyl cysteine can increase the risk for hypotension and headaches when taken with intravenous or transdermal nitroglycerin.
Clinical research shows that concomitant administration of N-acetyl cysteine and intravenous or transdermal nitroglycerin can cause severe hypotension and intolerable headaches. Furthermore, in vitro research suggests that N-acetyl cysteine increases the anticoagulant activity of nitroglycerin.
Activated Charcoal
N-acetyl cysteine might reduce the effects of activated charcoal, while activated charcoal might reduce the absorption of N-acetyl cysteine.
N-acetyl cysteine appears to reduce the capacity of activated charcoal to adsorb acetaminophen and salicylic acid. Conversely, although clinical research suggests that although activated charcoal can reduce the absorption of N-acetyl cysteine by up to 40%, it does not seem to reduce its clinical effects. Other clinical evidence suggests that activated charcoal does not affect the absorption of N-acetyl cysteine.
Anticoagulant/Antiplatelet Drugs
Theoretically, N-acetyl cysteine might increase the risk of bleeding when taken with anticoagulant or antiplatelet drugs.
Clinical research suggests that intravenous N-acetyl cysteine decreases prothrombin time, prolongs coagulation time, decreases platelet aggregation, and increases blood loss in surgical patients. Furthermore, in vitro research suggests that N-acetyl cysteine increases the anticoagulant activity of nitroglycerin.
Antihypertensive Drugs
Theoretically, N-acetyl cysteine might increase the risk of hypotension when taken with antihypertensive drugs.
Animal research suggests that N-acetyl cysteine potentiates the hypotensive effects of the angiotensin-converting enzyme inhibitors (ACEIs) captopril and enalaprilat. Theoretically, combining N-acetyl cysteine with other antihypertensive drugs might increase the risk of hypotension.
Chloroquine (Aralen)
Theoretically, N-acetyl cysteine might interfere with the antimalarial effects of chloroquine.
Animal research suggests that N-acetyl cysteine might reduce the antimalarial effects of chloroquine by increasing cellular levels of glutathione.
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 Glycine & NAC, from the product label.
Glycine & NAC by DoNotAge.org: Common Questions
Does Glycine & NAC by DoNotAge.org interact with any medications?
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Written and reviewed by the HelloPharmacist editorial staff. Our editorial policy
Not sure if Glycine & NAC 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 Glycine & NAC’s Ingredients
Every ingredient we hold a full HelloPharmacist monograph for — uses, evidence, safety, and the complete interaction list.
Glycine
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 monographN-acetyl Cysteine (nac)
Interacts with 294 drugsN-acetyl cysteine (NAC) is a supplement form of the amino acid cysteine and a building block for the antioxidant glutathione. It has well-established prescription uses for acetaminophen over...
Read the full N-acetyl Cysteine (nac) monograph →Sources & How We Checked
Glycine & NAC'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 91 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
N-acetyl Cysteine (nac) 86 references
- Ellenhorn MJ, et al. Ellenhorn's Medical Toxicology: Diagnoses and Treatment of Human Poisoning. 2nd ed. Baltimore, MD: Williams & Wilkins, 1997.
- Jepsen S, Hansen AB. The influence of N-acetylcysteine on the measurement of prothrombin time and activated partial thromboplastin time in healthy subjects. Scand J Clin Lab Invest 1994;54:543-7. PubMed
- van Zandwijk N, Dalesio O, Pastorino U, et al. EUROSCAN, a randomized trial of vitamin A and N-acetylcysteine in patients with head and neck cancer or lung cancer. For the European Organization for Research and Treatment of Cancer Head and Neck and Lung C DOI
- Horowitz RS, Dart RC, Jarvie DR, et al. Placental transfer of N-acetylcysteine following human maternal acetaminophen toxicity. J Toxicol Clin Toxicol 1997;35:447-51.
- Bailey B, McGuigan MA. Management of anaphylactoid reactions to intravenous N-acetylcysteine. Ann Emerg Med 1998;31:710-5. PubMed
- Spiller HA, Krenzelok EP, Grande GA, et al. A prospective evaluation of the effect of activated charcoal before oral N-acetylcysteine in acetaminophen overdose. Ann Emerg Med 1994;23:519-23. PubMed
- Ardissino D, Merlini PA, Savonitto S, et al. Effect of transdermal nitroglycerin or N-acetylcysteine, or both, in the long-term treatment of unstable angina pectoris. J Am Coll Cardiol 1997;29:941-7. PubMed
- Horowitz JD, Henry CA, Syrjanen ML, et al. Nitroglycerine/N-acetylcysteine in the management of unstable angina pectoris. Eur Heart J 1988;9:95-100. PubMed
- Louwerse ES, Weverling GJ, Bossuyt PM, et al. Randomized, double-blind, controlled trial of acetylcysteine in amyotrophic lateral sclerosis. Arch Neurol 1995;52:559-64. PubMed
- Wiklund O, Fager G, Andersson A, et al. N-acetylcysteine treatment lowers plasma homocysteine but not serum lipoprotein(a) levels. Atherosclerosis 1996;119:99-106. PubMed
- De Flora S, Grassi C, Carati L. Attenuation of influenza-like symptomatology and improvement of cell-mediated immunity with long-term N-acetylcysteine treatment. Eur Respir J 1997;10:1535-41. PubMed
- Iversen HK. N-acetylcysteine enhances nitroglycerin-induced headache and cranial arterial responses. Clin Pharmacol Ther 1992;52:125-33. PubMed
- Behr J, Maier K, Degenkolb B, et al. Antioxidative and clinical effects of high-dose N-acetylcysteine in fibrosing alveolitis. Adjunctive therapy to maintenance immunosuppression. Am J Respir Crit Care Med 1997;156:1897-901.
- Tenenbein PK, Sitar DS, Tenenbein M. Interaction between N-acetylcysteine and activated charcoal: implications for the treatment of acetaminophen poisoning. Pharmacotherapy 2001;21:1331-6.
- Arstall MA, Yang J, Stafford I, et al. N-acetylcysteine in combination with nitroglycerin and streptokinase for the treatment of evolving acute myocardial infarction. Safety and biochemical effects. Circulation 1995;92:2855-62.
- Estensen RD, Levy M, Klopp SJ, et al. N-acetylcysteine suppression of the proliferative index in the colon of patients with previous adenomatous colonic polyps. Cancer Lett 1999;147:109-14. PubMed
- Pela R, Calcagni AM, Subiaco S, et al. N-acetylcysteine reduces the exacerbation rate in patients with moderate to severe COPD. Respiration 1999;66:495-500.. PubMed
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