GABA 500 mg Ingredients & Drug Interactions
by Nutricost
What is this page for?
First and foremost: checking GABA 500 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
GABA 500 mg is a dietary supplement by Nutricost with 2 active ingredients. Its ingredients are commonly taken for morning sickness in pregnancy, premenstrual syndrome (pms), preventing or treating b6 deficiency.Based on those ingredients, 425 medications have a known interaction with it, the most serious rated moderate. The ingredients most likely to interact are Gamma Aminobutyric Acid, Vitamin B6. Use the checker below to test your specific medication, or read the full HelloPharmacist Interaction Report.
Check Your Meds Against GABA 500 mg by Nutricost
Ask about any prescription or over-the-counter medication and we check it for interactions with GABA 500 mg by Nutricost — 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 GABA 500 mg by Nutricost
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: vitamin B6 and gamma-aminobutyric acid (GABA). Vitamin B6 is an essential B vitamin that your body uses for brain development, immune function, and the creation of neurotransmitters and hormones.
GABA is an amino acid that acts as a calming neurotransmitter in the brain and nervous system. The capsule also contains inactive ingredients—hypromellose, microcrystalline cellulose, and silicon dioxide—which serve as the capsule shell and filler.
Does it work?
Strong evidence
Vitamin B6 has established effectiveness for sideroblastic anemia (a blood disorder), vitamin B6 deficiency itself, and pyridoxine-dependent epilepsy. It is likely effective for high homocysteine levels (a heart-risk factor) and possibly effective for pregnancy-related nausea and vomiting.
For GABA, the evidence we hold is insufficient to rate its effectiveness. The data shows it has not been reliably studied for anxiety, ADHD, athletic performance, chronic bronchitis, or cerebral palsy.
If you're considering this product for one of those uses, talk with your doctor about whether the evidence supports it for your situation.
How safe is it?
Well-documented data
Vitamin B6 is well tolerated at doses under 100 mg daily. Common side effects—abdominal pain, headache, heartburn, nausea, and vomiting—are mild.
However, high doses over time can cause nerve damage (sensory neuropathy), especially with daily doses over 1,000 mg or cumulative doses of 1,000 grams or more, though neuropathy can occur at lower doses too. For GABA, short-term use appears generally well tolerated, though long-term safety isn't well studied.
Common side effects may include drowsiness, nausea, muscle weakness, and mild throat irritation. Neither ingredient has enough safety data to recommend during breastfeeding; vitamin B6 in pregnancy is rated Likely Safe but also Possibly Unsafe (meaning the data is mixed), so discuss it with your doctor.
Meds to double-check
Moderate interaction found
Check before starting if you take blood pressure medications (antihypertensives)—vitamin B6 and GABA both may add to their effect. Also double-check if you're on seizure medications (phenobarbital or phenytoin), amiodarone for heart rhythm, levodopa for Parkinson's disease, or any sedatives or CNS depressants.
Your doctor or pharmacist can review your full medication list against this product.
The bottom line
Scorecard at a glanceFully disclosed formula with strong clinical evidence behind its ingredients' uses. Moderate medication interactions have been identified, and safety information is well characterized.
This product is mainly useful if you have a vitamin B6 deficiency or are managing pregnancy-related nausea under medical guidance. The GABA ingredient lacks strong evidence for its intended effects.
Before you start, check your blood pressure medications, seizure medications, heart rhythm medications, and any sedatives or sleep aids with your doctor or pharmacist to make sure the interactions won't be a problem for you.
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 Jun 16, 2022.
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 GABA 500 mg, straight from the product label.
| Brand | Nutricost |
|---|---|
| Barcode (UPC) | 810014672793 |
| Net contents | 240 Capsule(s) |
| Market status | On market |
| Date entered into DSLD | Jun 16, 2022 |
| DSLD ID | 270416 |
| Product type | Other Combinations |
| Supplement form | Capsule |
| Dietary claims / uses | Nutrient, All Other, Structure/Function |
| Intended target group(s) | Vegetarian, Adult (18 - 50 Years), Gluten 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 GABA 500 mg by Nutricost, sourced from the NIH Dietary Supplement Label Database.
Supplement Facts
| Ingredient | Amount | % DV |
|---|---|---|
| Vitamin B6 | 2 mg | 120% |
| Gamma Aminobutyric Acid | 500 mg | -- |
Other ingredients: Hypromellose, Microcrystalline Cellulose, Silicon Dioxide
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 Use: As a dietary supplement, take 1 capsule daily with 8-12 oz of water or as directed by your healthcare professional.
Formulation
Third Party Tested
Non-GMO Gluten-Free
Vegetarian Product
Gluten-Free product Non-GMO product
Precautions
Warning: For healthy individuals 18 years and older.
Consult a healthcare professional prior to use if you are pregnant or nursing, taking medication, or have a medical condition.
Keep out of reach of children.
Do not use if safety seal is broken or missing.
Storage
Notice: Store in a cool, dry place.
Formula
Gamma Aminobutyric Acid with Vitamin B6 500 mg Gaba per serving 2 mg B6 per serving
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.
Seals/Symbols
Quality Guaranteed Nutricost
Is this label outdated? Report a formula or label change and our pharmacy team will review it.
GABA 500 mg by Nutricost 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 GABA 500 mg by Nutricost
These are the 2 active ingredients this product is made of. Select any to open its full monograph.
Serving size1 Capsule(s) Dosage formCapsule Servings per container240 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.
Vitamin B6
Interacts with210 drugs
Vitamin B6 (pyridoxine) is an essential water-soluble vitamin that your body needs for metabolism, brain function, and making red blood cells. It is b...
Vitamin B6 monograph & interactionsGamma Aminobutyric Acid
Interacts with419 drugs
GABA is a calming chemical messenger (neurotransmitter) that your body makes on its own, and it is sold as a supplement for stress, anxiety, and sleep...
Gamma Aminobutyric Acid monograph & interactionsOther (inactive) ingredients: Hypromellose, Microcrystalline Cellulose, Silicon Dioxide. These complete the product’s ingredient list but are not active constituents.
GABA 500 mg by Nutricost Drug Interactions
HelloPharmacist Interaction Report
Nutricost GABA 500 mg contains two active ingredients—vitamin B6 and GABA—and together they interact with a significant number of medications.
The most serious concern is vitamin B6's Moderate-severity interaction with antihypertensive drugs (blood pressure medications), where it may add to their blood-pressure-lowering effect and potentially cause low blood pressure.
Read the full breakdown — every affected drug type, severity by severity
Vitamin B6 also carries Moderate-severity interactions with amiodarone (a heart rhythm medication), where it may worsen sun sensitivity; phenobarbital and phenytoin (seizure medications), where high doses can reduce their effectiveness by speeding up how your body breaks them down; and a Minor interaction with levodopa for Parkinson's disease, though this doesn't occur when carbidopa is taken alongside it.
GABA adds Moderate-severity interactions with antihypertensive drugs—again, a blood-pressure concern—and a Minor interaction with CNS depressants (sedatives, sleep aids, opioids), where additive drowsiness is theoretically possible, though it's unclear how much of a real-world risk that is.
Altogether, these interactions span 425 individual medications. Use the medication checker on this page to search your exact prescriptions before starting.
Check your own medications below · Editorial policy · How we use AI
Want to check YOUR meds against GABA 500 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 GABA 500 mg interact with 425 drugs. Click any drug to see the details.
2 of the 2 ingredients in GABA 500 mg interact with drugs. Each result below shows which ingredient is responsible. Gamma Aminobutyric Acid Vitamin B6
AcepromazineAtravet
How Acepromazine interacts with GABA 500 mg — through 1 ingredient. Tap an ingredient for the detail:
Gamma Aminobutyric AcidCns Depressants Minor
Interaction Summary
Theoretically, GABA might have additive sedative effects when used in conjunction with CNS depressants.
Read the full Gamma Aminobutyric Acid + Acepromazine interactionAcetaminophen, Butalbital, Caffeine, CodeineEsgic with Codeine, Fioricet w/ Codeine
How Acetaminophen, Butalbital, Caffeine, Codeine interacts with GABA 500 mg — through 1 ingredient. Tap an ingredient for the detail:
Gamma Aminobutyric AcidCns Depressants Minor
Interaction Summary
Theoretically, GABA might have additive sedative effects when used in conjunction with CNS depressants.
Read the full Gamma Aminobutyric Acid + Acetaminophen, Butalbital, Caffeine, Codeine interactionAcetaminophen, Butalbital, CodeineBancap w/ Codeine
How Acetaminophen, Butalbital, Codeine interacts with GABA 500 mg — through 1 ingredient. Tap an ingredient for the detail:
Gamma Aminobutyric AcidCns Depressants Minor
Interaction Summary
Theoretically, GABA might have additive sedative effects when used in conjunction with CNS depressants.
Read the full Gamma Aminobutyric Acid + Acetaminophen, Butalbital, Codeine interactionAcetaminophen, Butalbital, Codeine PhosphatePhrenilin #3
How Acetaminophen, Butalbital, Codeine Phosphate interacts with GABA 500 mg — through 1 ingredient. Tap an ingredient for the detail:
Gamma Aminobutyric AcidCns Depressants Minor
Interaction Summary
Theoretically, GABA might have additive sedative effects when used in conjunction with CNS depressants.
Read the full Gamma Aminobutyric Acid + Acetaminophen, Butalbital, Codeine Phosphate interactionAcetaminophen, Caffeine, Chlorpheniramine, Hydrocodone, PhenylephrineHycomine Compound
How Acetaminophen, Caffeine, Chlorpheniramine, Hydrocodone, Phenylephrine interacts with GABA 500 mg — through 1 ingredient. Tap an ingredient for the detail:
Gamma Aminobutyric AcidCns Depressants Minor
Interaction Summary
Theoretically, GABA might have additive sedative effects when used in conjunction with CNS depressants.
Read the full Gamma Aminobutyric Acid + Acetaminophen, Caffeine, Chlorpheniramine, Hydrocodone, Phenylephrine interactionAcetaminophen, Caffeine, CodeineGesic C15, Gesic C30, Gesic C8, Lenoltec 1, Lenoltec 2, Lenoltec 3 +1 more
How Acetaminophen, Caffeine, Codeine interacts with GABA 500 mg — through 1 ingredient. Tap an ingredient for the detail:
Gamma Aminobutyric AcidCns Depressants Minor
Interaction Summary
Theoretically, GABA might have additive sedative effects when used in conjunction with CNS depressants.
Read the full Gamma Aminobutyric Acid + Acetaminophen, Caffeine, Codeine interactionAcetaminophen, Caffeine, Codeine, SalicylamideCodalan No.1, Codalan No.2, Codalan No.3
How Acetaminophen, Caffeine, Codeine, Salicylamide interacts with GABA 500 mg — through 1 ingredient. Tap an ingredient for the detail:
Gamma Aminobutyric AcidCns Depressants Minor
Interaction Summary
Theoretically, GABA might have additive sedative effects when used in conjunction with CNS depressants.
Read the full Gamma Aminobutyric Acid + Acetaminophen, Caffeine, Codeine, Salicylamide interactionAcetaminophen, Caffeine, DihydrocodeineDHC Plus, Panlor DC, Panlor SS
How Acetaminophen, Caffeine, Dihydrocodeine interacts with GABA 500 mg — through 1 ingredient. Tap an ingredient for the detail:
Gamma Aminobutyric AcidCns Depressants Minor
Interaction Summary
Theoretically, GABA might have additive sedative effects when used in conjunction with CNS depressants.
Read the full Gamma Aminobutyric Acid + Acetaminophen, Caffeine, Dihydrocodeine interactionAcetaminophen, Chlorpheniramine, Codeine, PhenylephrineColrex
How Acetaminophen, Chlorpheniramine, Codeine, Phenylephrine interacts with GABA 500 mg — through 1 ingredient. Tap an ingredient for the detail:
Gamma Aminobutyric AcidCns Depressants Minor
Interaction Summary
Theoretically, GABA might have additive sedative effects when used in conjunction with CNS depressants.
Read the full Gamma Aminobutyric Acid + Acetaminophen, Chlorpheniramine, Codeine, Phenylephrine interactionAcetaminophen, Chlorpheniramine, Phenylpropanolamine, OpiumHista-Derfule
How Acetaminophen, Chlorpheniramine, Phenylpropanolamine, Opium interacts with GABA 500 mg — through 1 ingredient. Tap an ingredient for the detail:
Gamma Aminobutyric AcidCns Depressants Minor
Interaction Summary
Theoretically, GABA might have additive sedative effects when used in conjunction with CNS depressants.
Read the full Gamma Aminobutyric Acid + Acetaminophen, Chlorpheniramine, Phenylpropanolamine, Opium interactionAcetaminophen, Chlorzoxazone, CodeineAcetazone Forte C8, Parafon Forte C8
How Acetaminophen, Chlorzoxazone, Codeine interacts with GABA 500 mg — through 1 ingredient. Tap an ingredient for the detail:
Gamma Aminobutyric AcidCns Depressants Minor
Interaction Summary
Theoretically, GABA might have additive sedative effects when used in conjunction with CNS depressants.
Read the full Gamma Aminobutyric Acid + Acetaminophen, Chlorzoxazone, Codeine interactionAcetaminophen, CodeineTylenol No.3, Tylenol w/ Codeine
How Acetaminophen, Codeine interacts with GABA 500 mg — through 1 ingredient. Tap an ingredient for the detail:
Gamma Aminobutyric AcidCns Depressants Minor
Interaction Summary
Theoretically, GABA might have additive sedative effects when used in conjunction with CNS depressants.
Read the full Gamma Aminobutyric Acid + Acetaminophen, Codeine interactionAcetaminophen, Codeine, DoxylamineMersyndol
How Acetaminophen, Codeine, Doxylamine interacts with GABA 500 mg — through 1 ingredient. Tap an ingredient for the detail:
Gamma Aminobutyric AcidCns Depressants Minor
Interaction Summary
Theoretically, GABA might have additive sedative effects when used in conjunction with CNS depressants.
Read the full Gamma Aminobutyric Acid + Acetaminophen, Codeine, Doxylamine interactionAcetaminophen, Codeine, MethocarbamolAcetaminophen, Codeine, Methocarbamol, Robaxacet 8
How Acetaminophen, Codeine, Methocarbamol interacts with GABA 500 mg — through 1 ingredient. Tap an ingredient for the detail:
Gamma Aminobutyric AcidCns Depressants Minor
Interaction Summary
Theoretically, GABA might have additive sedative effects when used in conjunction with CNS depressants.
Read the full Gamma Aminobutyric Acid + Acetaminophen, Codeine, Methocarbamol interactionAcetaminophen, Dichloralantipyrine, IsomethepteneAmidrine, Midchlor, Migquin, Migratine
How Acetaminophen, Dichloralantipyrine, Isometheptene interacts with GABA 500 mg — through 1 ingredient. Tap an ingredient for the detail:
Gamma Aminobutyric AcidCns Depressants Minor
Interaction Summary
Theoretically, GABA might have additive sedative effects when used in conjunction with CNS depressants.
Read the full Gamma Aminobutyric Acid + Acetaminophen, Dichloralantipyrine, Isometheptene interactionAcetaminophen, Dichloralphenazone, IsomethepteneMidrin
How Acetaminophen, Dichloralphenazone, Isometheptene interacts with GABA 500 mg — through 1 ingredient. Tap an ingredient for the detail:
Gamma Aminobutyric AcidCns Depressants Minor
Interaction Summary
Theoretically, GABA might have additive sedative effects when used in conjunction with CNS depressants.
Read the full Gamma Aminobutyric Acid + Acetaminophen, Dichloralphenazone, Isometheptene interactionAcetaminophen, Dichlorophenazone, IsometheptaneIsocom
How Acetaminophen, Dichlorophenazone, Isometheptane interacts with GABA 500 mg — through 1 ingredient. Tap an ingredient for the detail:
Gamma Aminobutyric AcidCns Depressants Minor
Interaction Summary
Theoretically, GABA might have additive sedative effects when used in conjunction with CNS depressants.
Read the full Gamma Aminobutyric Acid + Acetaminophen, Dichlorophenazone, Isometheptane interactionAcetaminophen, DiphenhydramineTylenol PM, Tylenol PM Ex Strength
How Acetaminophen, Diphenhydramine interacts with GABA 500 mg — through 1 ingredient. Tap an ingredient for the detail:
Gamma Aminobutyric AcidCns Depressants Minor
Interaction Summary
Theoretically, GABA might have additive sedative effects when used in conjunction with CNS depressants.
Read the full Gamma Aminobutyric Acid + Acetaminophen, Diphenhydramine interactionAcetaminophen, Diphenhydramine, PseudoephedrineChildren's Tylenol Allergy, Cold Control, Contac Night Allergy Relief
How Acetaminophen, Diphenhydramine, Pseudoephedrine interacts with GABA 500 mg — through 1 ingredient. Tap an ingredient for the detail:
Gamma Aminobutyric AcidCns Depressants Minor
Interaction Summary
Theoretically, GABA might have additive sedative effects when used in conjunction with CNS depressants.
Read the full Gamma Aminobutyric Acid + Acetaminophen, Diphenhydramine, Pseudoephedrine interactionAcetaminophen, HydrocodoneAnexsia, Anodynos DHC, Azdone, Co-Gesic, Doucet, Lorcet +9 more
How Acetaminophen, Hydrocodone interacts with GABA 500 mg — through 1 ingredient. Tap an ingredient for the detail:
Gamma Aminobutyric AcidCns Depressants Minor
Interaction Summary
Theoretically, GABA might have additive sedative effects when used in conjunction with CNS depressants.
Read the full Gamma Aminobutyric Acid + Acetaminophen, Hydrocodone interactionAcetaminophen, MeperidineDemerol APAP
How Acetaminophen, Meperidine interacts with GABA 500 mg — through 1 ingredient. Tap an ingredient for the detail:
Gamma Aminobutyric AcidCns Depressants Minor
Interaction Summary
Theoretically, GABA might have additive sedative effects when used in conjunction with CNS depressants.
Read the full Gamma Aminobutyric Acid + Acetaminophen, Meperidine interactionAcetaminophen, OxycodonePercocet, Roxicet, Tylox, Xartemis XR
How Acetaminophen, Oxycodone interacts with GABA 500 mg — through 1 ingredient. Tap an ingredient for the detail:
Gamma Aminobutyric AcidCns Depressants Minor
Interaction Summary
Theoretically, GABA might have additive sedative effects when used in conjunction with CNS depressants.
Read the full Gamma Aminobutyric Acid + Acetaminophen, Oxycodone interactionAcetaminophen, PentazocineTalacen
How Acetaminophen, Pentazocine interacts with GABA 500 mg — through 1 ingredient. Tap an ingredient for the detail:
Gamma Aminobutyric AcidCns Depressants Minor
Interaction Summary
Theoretically, GABA might have additive sedative effects when used in conjunction with CNS depressants.
Read the full Gamma Aminobutyric Acid + Acetaminophen, Pentazocine interactionAcetaminophen, PropoxypheneDarvocet-N 100, Darvocet-N 50, E-Lor, Wygesic
How Acetaminophen, Propoxyphene interacts with GABA 500 mg — through 1 ingredient. Tap an ingredient for the detail:
Gamma Aminobutyric AcidCns Depressants Minor
Interaction Summary
Theoretically, GABA might have additive sedative effects when used in conjunction with CNS depressants.
Read the full Gamma Aminobutyric Acid + Acetaminophen, Propoxyphene interactionAlfentanilAlfenta
How Alfentanil interacts with GABA 500 mg — through 1 ingredient. Tap an ingredient for the detail:
Gamma Aminobutyric AcidCns Depressants Minor
Interaction Summary
Theoretically, GABA might have additive sedative effects when used in conjunction with CNS depressants.
Read the full Gamma Aminobutyric Acid + Alfentanil interactionAlprazolamNiravam, Xanax
How Alprazolam interacts with GABA 500 mg — through 1 ingredient. Tap an ingredient for the detail:
Gamma Aminobutyric AcidCns Depressants Minor
Interaction Summary
Theoretically, GABA might have additive sedative effects when used in conjunction with CNS depressants.
Read the full Gamma Aminobutyric Acid + Alprazolam interactionAluminum Hydroxide, Aspirin, Codeine Phosphate, Magnesium HydroxideAscriptin Codeine #2
How Aluminum Hydroxide, Aspirin, Codeine Phosphate, Magnesium Hydroxide interacts with GABA 500 mg — through 1 ingredient. Tap an ingredient for the detail:
Gamma Aminobutyric AcidCns Depressants Minor
Interaction Summary
Theoretically, GABA might have additive sedative effects when used in conjunction with CNS depressants.
Read the full Gamma Aminobutyric Acid + Aluminum Hydroxide, Aspirin, Codeine Phosphate, Magnesium Hydroxide interactionAminoglutethimideCytadren
How Aminoglutethimide interacts with GABA 500 mg — through 1 ingredient. Tap an ingredient for the detail:
Gamma Aminobutyric AcidCns Depressants Minor
Interaction Summary
Theoretically, GABA might have additive sedative effects when used in conjunction with CNS depressants.
Read the full Gamma Aminobutyric Acid + Aminoglutethimide interactionAminophylline, Amobarbital, EphedrineAmesec
How Aminophylline, Amobarbital, Ephedrine interacts with GABA 500 mg — through 1 ingredient. Tap an ingredient for the detail:
Gamma Aminobutyric AcidCns Depressants Minor
Interaction Summary
Theoretically, GABA might have additive sedative effects when used in conjunction with CNS depressants.
Read the full Gamma Aminobutyric Acid + Aminophylline, Amobarbital, Ephedrine interactionAmitriptylineElavil
How Amitriptyline interacts with GABA 500 mg — through 1 ingredient. Tap an ingredient for the detail:
Gamma Aminobutyric AcidCns Depressants Minor
Interaction Summary
Theoretically, GABA might have additive sedative effects when used in conjunction with CNS depressants.
Read the full Gamma Aminobutyric Acid + Amitriptyline interactionEach ingredient & the kinds of drugs it affects
For each ingredient in GABA 500 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.
Gamma Aminobutyric Acid
Antihypertensive Drugs
Theoretically, taking GABA with antihypertensive drugs might increase the risk of hypotension.
Some clinical research shows that GABA can decrease blood pressure in patients with hypertension.
Cns Depressants
Theoretically, GABA might have additive sedative effects when used in conjunction with CNS depressants. However, it is unclear if this concern is clinically relevant.
Endogenous GABA has well-established relaxant effects and GABA(A) receptors have an established physiological role in sleep. However, the effects of GABA supplements are unclear, as it is unknown whether exogenous GABA crosses the blood-brain barrier. Although there have been limited reports of drowsiness or tiredness with GABA supplements, these effects have not been widely reported in clinical studies. Additionally, intravenous GABA 0.1-1 mg/kg has been shown to induce anxiety in a dose-dependent manner.
Vitamin B6
Amiodarone (Cordarone)
Theoretically, vitamin B6 might increase the photosensitivity caused by amiodarone.
Despite initial case reports suggesting that pyridoxine may have a protective effect against amiodarone-induced photosensitivity, preliminary clinical research suggests that pyridoxine may actually exacerbate this adverse effect.
Antihypertensive Drugs
Theoretically, vitamin B6 may have additive effects when used with antihypertensive drugs.
Research in hypertensive rats shows that vitamin B6 can decrease systolic blood pressure. Similarly, clinical research in patients with hypertension shows that taking high doses of vitamin B6 may reduce systolic and diastolic blood pressure, possibly by reducing plasma levels of epinephrine and norepinephrine.
Phenobarbital (Luminal)
High doses of vitamin B6 may reduce the levels and clinical effects of phenobarbital.
Preliminary clinical evidence suggests that vitamin B6 200 mg daily can reduce plasma levels of phenobarbital, possibly by increasing metabolism. It is not known whether lower doses have any effect. Advise people taking phenobarbital to avoid high doses of vitamin B6.
Phenytoin (Dilantin)
High doses of vitamin B6 may reduce the levels and clinical effects of phenytoin.
Preliminary clinical evidence suggests that vitamin B6 200 mg daily can reduce plasma levels of phenytoin, possibly by increasing metabolism. It is not known whether lower doses have any effect. Advise people taking phenytoin to avoid high doses of vitamin B6.
Levodopa
Vitamin B6 may increase the metabolism of levodopa when taken alone, but not when taken in conjunction with carbidopa.
Vitamin B6 (pyridoxine) enhances the metabolism of levodopa, reducing its clinical effects. However, this interaction does not occur when carbidopa is used concurrently with levodopa (Sinemet). Therefore, it is not likely to be a problem in most people.
Brand information
Manufacturer and brand details for GABA 500 mg, from the product label.
Nutricost
See all Nutricost products- Name
- Nutricost
- Street Address
- 351 E 1750 N
- City
- Vineyard
- State
- UT
- ZipCode
- 84059
- Phone Number
- (866) 438-3694
- Web Address
- www.nutricost.com
GABA 500 mg by Nutricost: Common Questions
Does GABA 500 mg by Nutricost interact with any medications?
How can one product interact with so many drugs?
Where does this information come from?
Can I take this if I'm pregnant?
Is it safe to take while breastfeeding?
What side effects might I notice?
Does GABA actually work for anxiety or sleep?
Why does this product have vitamin B6 in it?
Written and reviewed by the HelloPharmacist editorial staff. Our editorial policy
Not sure if GABA 500 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 GABA 500 mg’s Ingredients
Every ingredient we hold a full HelloPharmacist monograph for — uses, evidence, safety, and the complete interaction list.
Vitamin B6
Interacts with 210 drugsVitamin B6 (pyridoxine) is an essential water-soluble vitamin that your body needs for metabolism, brain function, and making red blood cells. It is best known for helping with pregnancy-rel...
Read the full Vitamin B6 monograph → Herb & supplement monographGamma-aminobutyric Acid (gaba)
Interacts with 419 drugsGABA is a calming chemical messenger (neurotransmitter) that your body makes on its own, and it is sold as a supplement for stress, anxiety, and sleep. The science behind oral GABA supplemen...
Read the full Gamma-aminobutyric Acid (gaba) monograph →Sources & How We Checked
GABA 500 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 44 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.
Vitamin B6 32 references
- Hansten PD, Horn JR. Drug Interactions Analysis and Management. Vancouver, WA: Applied Therapeutics Inc., 1997 and updates.
- Yates AA, Schlicker SA, Suitor CW. Dietary reference intakes: The new basis for recommendations for calcium and related nutrients, B vitamins, and choline. J Am Diet Assoc 1998;98:699-706. PubMed
- Geerling BJ, Dagnelie PC, Badart-Smook A, et al. Diet as a risk factor for the development of ulcerative colitis. Am J Gastroenterol 2000;95:1008-13. PubMed
- South M. Neonatal seizures after pyridoxine use -- reply. Lancet 1999;354:2083. PubMed
- Food and Nutrition Board, Institute of Medicine. Dietary Reference Intakes for Thiamin, Riboflavin, Niacin, Vitamin B6, Folate, Vitamin B12, Pantothenic Acid, Biotin, and Choline (2000). Washington, DC: National Academy Press, 2000. Available at: http://b
- Baxter P, Aicardi J. Neonatal seizures after pyridoxine use. Lancet 1999;354:2082-3. PubMed
- Bendich A, Cohen M. Vitamin B6 safety issues. Ann N Y Acad Sci 1990;585:321-30.
- Schaumburg H, Kaplan J, Windebank A. Sensory neuropathy from pyridoxine abuse. A new megavitamin syndrome. N Engl J Med 1983;309:445-8. PubMed
- Gordon N. Pyridoxine dependency: an update. Dev Med Child Neurol 1997;39:63-5. PubMed
- Lewis PJ. Pain in the hand and wrist. Pyridoxine supplements may help patients with carpal tunnel syndrome. BMJ 1995;310:1534. PubMed
- Kaufman G. Pyridoxine against amiodarone-induced photosensitivity (letter). Lancet 1984;1:51-2. PubMed
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See these in context on the Gamma-aminobutyric Acid (gaba) monograph →
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