Melatonin 10 mg Ingredients & Drug Interactions
What is this page for?
First and foremost: checking Melatonin 10 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
Melatonin 10 mg is a dietary supplement by OL Olympian Labs 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, 1,461 medications have a known interaction with it, the most serious rated moderate. The ingredients most likely to interact are Melatonin, Vitamin B6. Use the checker below to test your specific medication, or read the full HelloPharmacist Interaction Report.
Check Your Meds Against Melatonin 10 mg by OL Olympian Labs
Ask about any prescription or over-the-counter medication and we check it for interactions with Melatonin 10 mg by OL Olympian Labs — 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 Melatonin 10 mg by OL Olympian Labs
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: melatonin and vitamin B6. Melatonin is a hormone your body naturally produces to regulate sleep-wake cycles; it's used here to support sleep.
Vitamin B6 is a water-soluble vitamin involved in nerve function, immune response, and many other metabolic processes. The remaining ingredients are inactive — microcrystalline cellulose, di-calcium phosphate, methylcellulose, stearic acid, silicon dioxide, and magnesium stearate — which serve as binders, fillers, and flow agents in the tablet.
Does it work?
Strong evidence
For melatonin's main uses, the evidence shows it is likely effective for non-24-hour sleep-wake disorder and delayed sleep phase syndrome (a condition where your natural sleep rhythm is shifted later than desired). It is possibly effective for pre-procedural anxiety and sunburn, and possibly effective for lowering blood pressure.
Vitamin B6 is effective for sideroblastic anemia and vitamin B6 deficiency, likely effective for high homocysteine levels, and possibly effective for pregnancy-related nausea and vomiting.
How safe is it?
Well-documented data
Melatonin is generally well tolerated for short-term use, though long-term safety is less certain and supplement quality can vary across brands. Common side effects include dizziness, drowsiness, headache, and nausea.
Rare serious concerns include increased seizure risk and mood changes such as depression or hallucinations. Vitamin B6 is well tolerated at doses under 100 mg daily; common side effects are abdominal pain, headache, nausea, and heartburn.
At high doses or over long periods, it can cause nerve damage (sensory neuropathy), particularly at doses exceeding 1,000 mg daily or cumulative totals of 1,000 grams or more, though neuropathy can occur at lower doses too.
Meds to double-check
Moderate interaction found
Before taking this product, double-check with your pharmacist if you take anticonvulsants (seizure medications), blood thinners or antiplatelet drugs (including warfarin), antihypertensive drugs (blood pressure medication), diabetes medications, immunosuppressants, heart medications like extended-release nifedipine, levodopa (for Parkinson's disease), or amiodarone (a heart rhythm medication). All of these carry documented Moderate interactions with at least one ingredient in this product.
The bottom line
Scorecard at a glanceFully disclosed formula with clinical evidence supporting its stated purpose. Moderate medication interactions have been identified, and safety information is well characterized.
This product is best suited for people who want melatonin's sleep support combined with B6, though the dose of B6 here is moderate. If you take any medication — especially seizure drugs, blood thinners, blood pressure meds, diabetes drugs, or heart medications — check with your pharmacist first; the interaction list is substantial.
Talk to your pharmacist about whether this combination fits your health picture.
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 Apr 24, 2025.
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 Melatonin 10 mg, straight from the product label.
| Brand | OL Olympian Labs |
|---|---|
| Barcode (UPC) | 710013910363 |
| Net contents | 60 Vegan Tablet(s) |
| Market status | On market |
| Date entered into DSLD | Apr 24, 2025 |
| DSLD ID | 326677 |
| Product type | Other Combinations |
| Supplement form | Tablet Or Pill |
| Dietary claims / uses | All Other, Structure/Function |
| Intended target group(s) | Vegan, Vegetarian, Adult (18 - 50 Years), No Allergies, 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 Melatonin 10 mg by OL Olympian Labs, sourced from the NIH Dietary Supplement Label Database.
Supplement Facts
| Ingredient | Amount | % DV |
|---|---|---|
| Vitamin B6 | 10 mg | 500% |
| Melatonin | 10 mg | -- |
Other ingredients: Microcrystalline Cellulose, Di-Calcium Phosphate, Methylcellulose, Stearic Acid, Silicon Dioxide, Magnesium Stearate
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.
Formulation
Olympian Labs, Inc. products are made with the highest quality ingredients and manufactured according to current Good Manufacturing Practices (cGMP).
We do not use ingredients that were produced using modern biotechnology
Maximum strength Time release Sleep aid
Non-GMO Gluten free
Vegan
Fall asleep faster
Drug-free
Supports restful sleep
No: Milk, eggs, fish, crustaceans shellfish, tree nuts, peanuts, wheat, or soybeans.
Allergen free
Made in USA
Precautions
Caution: If you are pregnant or nursing, have a medical condition, or are taking medication, consult your healthcare professional before using this or any other nutritional supplement.
Discontinue use if allergic reaction occurs.
Keep out of reach of children.
Storage
Store in a cool, dry place.
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
Suggested/Recommended/Usage/Directions
Suggested Use: As a dietary supplement, take one (1) tablet daily, prior to bedtime, or as directed by a healthcare professional.
The best time to take this nutritional supplement is before bedtime.
General Statements
Melatonin is naturally secreted from the pineal gland at night.
Is this label outdated? Report a formula or label change and our pharmacy team will review it.
Melatonin 10 mg by OL Olympian Labs 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 Melatonin 10 mg by OL Olympian Labs
These are the 2 active ingredients this product is made of. Select any to open its full monograph.
Serving size1 Tablet(s) Dosage formTablet Or Pill Servings per container60 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 & interactionsMelatonin
Interacts with1,461 drugs
Melatonin is a hormone your body makes naturally to help control your sleep-wake cycle, and the supplement form is widely used to help with sleep timi...
Melatonin monograph & interactionsOther (inactive) ingredients: Microcrystalline Cellulose, Di-Calcium Phosphate, Methylcellulose, Stearic Acid, Silicon Dioxide, Magnesium Stearate. These complete the product’s ingredient list but are not active constituents.
Melatonin 10 mg by OL Olympian Labs Drug Interactions
HelloPharmacist Interaction Report
Melatonin 10 mg by OL Olympian Labs contains two active ingredients, both of which have documented interactions with medications.
The most serious concern is with anticonvulsants (seizure medications) — melatonin may reduce how well they work and might even increase seizure frequency, especially in children with neurological conditions.
Read the full breakdown — every affected drug type, severity by severity
Vitamin B6, the second ingredient, interacts with blood pressure medications (antihypertensives), where it may add to their blood-pressure-lowering effect. It also affects two seizure medications specifically — phenobarbital and phenytoin — where high doses can reduce their levels and effectiveness.
Additionally, B6 may increase sun sensitivity caused by amiodarone (a heart rhythm drug).
Melatonin carries several other Moderate-severity interactions: blood thinners and antiplatelet drugs (including warfarin), where it may raise bleeding risk; diabetes medications, where it might lower blood sugar too much; heart medications like extended-release nifedipine, where it can reduce their effectiveness; and immunosuppressant drugs, where it may interfere with their intended effect. B6 also has a Minor interaction with levodopa (Parkinson's medication) when levodopa is taken alone, though not when combined with carbidopa.
Altogether, these interactions span 1,445 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 Melatonin 10 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 Melatonin 10 mg interact with 1,461 drugs. Click any drug to see the details.
2 of the 2 ingredients in Melatonin 10 mg interact with drugs. Each result below shows which ingredient is responsible. Melatonin Vitamin B6
6-mercaptopurinePurinethol
How 6-mercaptopurine interacts with Melatonin 10 mg — through 1 ingredient. Tap an ingredient for the detail:
MelatoninImmunosuppressants Moderate
Interaction Summary
Theoretically, melatonin might interfere with immunosuppressive therapy.
Read the full Melatonin + 6-mercaptopurine interactionAbciximabReoPro
How Abciximab interacts with Melatonin 10 mg — through 1 ingredient. Tap an ingredient for the detail:
MelatoninAnticoagulant/antiplatelet Drugs Moderate
Interaction Summary
Theoretically, melatonin may have anticoagulant effects and may increase the risk of bleeding if used with anticoagulant or antiplatelet drugs.
Read the full Melatonin + Abciximab interactionAbrocitinibCibinqo
How Abrocitinib interacts with Melatonin 10 mg — through 1 ingredient. Tap an ingredient for the detail:
MelatoninAnticoagulant/antiplatelet Drugs, Immunosuppressants +1 Moderate
Interaction Summary
Theoretically, melatonin may have anticoagulant effects and may increase the risk of bleeding if used with anticoagulant or antiplatelet drugs.
Read the full Melatonin + Abrocitinib interactionAcarboseGlucobay, Prandase, Precose
How Acarbose interacts with Melatonin 10 mg — through 1 ingredient. Tap an ingredient for the detail:
MelatoninAntidiabetes Drugs Moderate
Interaction Summary
Theoretically, taking melatonin with antidiabetes drugs might increase the risk of hypoglycemia.
Read the full Melatonin + Acarbose interactionAcebutololRhotral, Sectral
How Acebutolol interacts with Melatonin 10 mg — through 2 ingredients. Tap an ingredient for the detail:
MelatoninAntihypertensive Drugs Moderate
Interaction Summary
Theoretically, taking melatonin with antihypertensive drugs might increase the risk of hypotension or hypertension.
Read the full Melatonin + Acebutolol interactionVitamin B6Antihypertensive Drugs Moderate
Interaction Summary
Theoretically, vitamin B6 may have additive effects when used with antihypertensive drugs.
Read the full Vitamin B6 + Acebutolol interactionAcenocoumarolSintrom
How Acenocoumarol interacts with Melatonin 10 mg — through 1 ingredient. Tap an ingredient for the detail:
MelatoninAnticoagulant/antiplatelet Drugs Moderate
Interaction Summary
Theoretically, melatonin may have anticoagulant effects and may increase the risk of bleeding if used with anticoagulant or antiplatelet drugs.
Read the full Melatonin + Acenocoumarol interactionAcepromazineAtravet
How Acepromazine interacts with Melatonin 10 mg — through 1 ingredient. Tap an ingredient for the detail:
MelatoninCns Depressants Moderate
Interaction Summary
Theoretically, taking melatonin might increase the sedative effects of CNS depressants.
Read the full Melatonin + Acepromazine interactionAcetaminophenChildren's Tylenol, Children's Tylenol Meltaways, Tylenol, Tylenol Ex Strength
How Acetaminophen interacts with Melatonin 10 mg — through 1 ingredient. Tap an ingredient for the detail:
MelatoninCytochrome P450 1a2 (cyp1a2) Substrates Moderate
Interaction Summary
Theoretically, melatonin might increase levels of drugs metabolized by CYP1A2.
Read the full Melatonin + Acetaminophen interactionAcetaminophen, AspirinGemnisyn
How Acetaminophen, Aspirin interacts with Melatonin 10 mg — through 1 ingredient. Tap an ingredient for the detail:
MelatoninCytochrome P450 1a2 (cyp1a2) Substrates, Anticoagulant/antiplatelet Drugs Moderate
Interaction Summary
Theoretically, melatonin might increase levels of drugs metabolized by CYP1A2.
Read the full Melatonin + Acetaminophen, Aspirin interactionAcetaminophen, Aspirin, CaffeineExcedrin, Excedrin Extra Strength, Excedrin Migraine
How Acetaminophen, Aspirin, Caffeine interacts with Melatonin 10 mg — through 1 ingredient. Tap an ingredient for the detail:
MelatoninAnticoagulant/antiplatelet Drugs, Cytochrome P450 1a2 (cyp1a2) Substrates +2 Moderate
Interaction Summary
Theoretically, melatonin may have anticoagulant effects and may increase the risk of bleeding if used with anticoagulant or antiplatelet drugs.
Read the full Melatonin + Acetaminophen, Aspirin, Caffeine interactionAcetaminophen, Brompheniramine, PhenylpropanolamineDimetapp Cold and Flu
How Acetaminophen, Brompheniramine, Phenylpropanolamine interacts with Melatonin 10 mg — through 1 ingredient. Tap an ingredient for the detail:
MelatoninSeizure Threshold Lowering Drugs, Cytochrome P450 1a2 (cyp1a2) Substrates Moderate
Interaction Summary
Theoretically, taking melatonin with drugs that lower the seizure threshold might increase the risk of seizure activity.
Read the full Melatonin + Acetaminophen, Brompheniramine, Phenylpropanolamine interactionAcetaminophen, ButalbitalAxocet, Bancap, Bucet, Butex Forte, Esgic CF, Orbivan CF +5 more
How Acetaminophen, Butalbital interacts with Melatonin 10 mg — through 1 ingredient. Tap an ingredient for the detail:
MelatoninCytochrome P450 1a2 (cyp1a2) Substrates Moderate
Interaction Summary
Theoretically, melatonin might increase levels of drugs metabolized by CYP1A2.
Read the full Melatonin + Acetaminophen, Butalbital interactionAcetaminophen, Butalbital, CaffeineEsgic, Esgic Plus, Fiogesic, Fioricet, Repan, Tecnal +1 more
How Acetaminophen, Butalbital, Caffeine interacts with Melatonin 10 mg — through 1 ingredient. Tap an ingredient for the detail:
MelatoninCytochrome P450 1a2 (cyp1a2) Substrates, Cytochrome P450 3a4 (cyp3a4) Substrates +1 Moderate
Interaction Summary
Theoretically, melatonin might increase levels of drugs metabolized by CYP1A2.
Read the full Melatonin + Acetaminophen, Butalbital, Caffeine interactionAcetaminophen, Butalbital, Caffeine, CodeineEsgic with Codeine, Fioricet w/ Codeine
How Acetaminophen, Butalbital, Caffeine, Codeine interacts with Melatonin 10 mg — through 1 ingredient. Tap an ingredient for the detail:
MelatoninCaffeine, Cytochrome P450 1a2 (cyp1a2) Substrates +4 Moderate
Interaction Summary
Theoretically, taking caffeine with melatonin might increase levels of melatonin.
Read the full Melatonin + Acetaminophen, Butalbital, Caffeine, Codeine interactionAcetaminophen, Butalbital, CodeineBancap w/ Codeine
How Acetaminophen, Butalbital, Codeine interacts with Melatonin 10 mg — through 1 ingredient. Tap an ingredient for the detail:
MelatoninCns Depressants, Cytochrome P450 1a2 (cyp1a2) Substrates +2 Moderate
Interaction Summary
Theoretically, taking melatonin might increase the sedative effects of CNS depressants.
Read the full Melatonin + Acetaminophen, Butalbital, Codeine interactionAcetaminophen, Butalbital, Codeine PhosphatePhrenilin #3
How Acetaminophen, Butalbital, Codeine Phosphate interacts with Melatonin 10 mg — through 1 ingredient. Tap an ingredient for the detail:
MelatoninCytochrome P450 1a2 (cyp1a2) Substrates, Cns Depressants +2 Moderate
Interaction Summary
Theoretically, melatonin might increase levels of drugs metabolized by CYP1A2.
Read the full Melatonin + Acetaminophen, Butalbital, Codeine Phosphate interactionAcetaminophen, Caffeine, Chlorpheniramine, Hydrocodone, PhenylephrineHycomine Compound
How Acetaminophen, Caffeine, Chlorpheniramine, Hydrocodone, Phenylephrine interacts with Melatonin 10 mg — through 1 ingredient. Tap an ingredient for the detail:
MelatoninCns Depressants, Caffeine +4 Moderate
Interaction Summary
Theoretically, taking melatonin might increase the sedative effects of CNS depressants.
Read the full Melatonin + 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 Melatonin 10 mg — through 1 ingredient. Tap an ingredient for the detail:
MelatoninCytochrome P450 2d6 (cyp2d6) Substrates, Cytochrome P450 1a2 (cyp1a2) Substrates +4 Moderate
Interaction Summary
Theoretically, melatonin might increase levels of drugs metabolized by CYP2D6.
Read the full Melatonin + Acetaminophen, Caffeine, Codeine interactionAcetaminophen, Caffeine, Codeine, SalicylamideCodalan No.1, Codalan No.2, Codalan No.3
How Acetaminophen, Caffeine, Codeine, Salicylamide interacts with Melatonin 10 mg — through 1 ingredient. Tap an ingredient for the detail:
MelatoninCaffeine, Seizure Threshold Lowering Drugs +4 Moderate
Interaction Summary
Theoretically, taking caffeine with melatonin might increase levels of melatonin.
Read the full Melatonin + Acetaminophen, Caffeine, Codeine, Salicylamide interactionAcetaminophen, Caffeine, DihydrocodeineDHC Plus, Panlor DC, Panlor SS
How Acetaminophen, Caffeine, Dihydrocodeine interacts with Melatonin 10 mg — through 1 ingredient. Tap an ingredient for the detail:
MelatoninCns Depressants, Seizure Threshold Lowering Drugs +4 Moderate
Interaction Summary
Theoretically, taking melatonin might increase the sedative effects of CNS depressants.
Read the full Melatonin + Acetaminophen, Caffeine, Dihydrocodeine interactionAcetaminophen, Caffeine, IsomethepteneMigralam
How Acetaminophen, Caffeine, Isometheptene interacts with Melatonin 10 mg — through 1 ingredient. Tap an ingredient for the detail:
MelatoninCaffeine, Cytochrome P450 1a2 (cyp1a2) Substrates +1 Moderate
Interaction Summary
Theoretically, taking caffeine with melatonin might increase levels of melatonin.
Read the full Melatonin + Acetaminophen, Caffeine, Isometheptene interactionAcetaminophen, Caffeine, PyrilamineMidol Max Strength Menstrual
How Acetaminophen, Caffeine, Pyrilamine interacts with Melatonin 10 mg — through 1 ingredient. Tap an ingredient for the detail:
MelatoninCytochrome P450 1a2 (cyp1a2) Substrates, Cytochrome P450 3a4 (cyp3a4) Substrates +1 Moderate
Interaction Summary
Theoretically, melatonin might increase levels of drugs metabolized by CYP1A2.
Read the full Melatonin + Acetaminophen, Caffeine, Pyrilamine interactionAcetaminophen, Chlorpheniramine Maleate, Dextromethorphan HbrVicks Formula 44M Cough, Cold & Flu Relief
How Acetaminophen, Chlorpheniramine Maleate, Dextromethorphan Hbr interacts with Melatonin 10 mg — through 1 ingredient. Tap an ingredient for the detail:
MelatoninCytochrome P450 1a2 (cyp1a2) Substrates, Cytochrome P450 3a4 (cyp3a4) Substrates +2 Moderate
Interaction Summary
Theoretically, melatonin might increase levels of drugs metabolized by CYP1A2.
Read the full Melatonin + Acetaminophen, Chlorpheniramine Maleate, Dextromethorphan Hbr interactionAcetaminophen, Chlorpheniramine, Codeine, PhenylephrineColrex
How Acetaminophen, Chlorpheniramine, Codeine, Phenylephrine interacts with Melatonin 10 mg — through 1 ingredient. Tap an ingredient for the detail:
MelatoninCytochrome P450 1a2 (cyp1a2) Substrates, Cytochrome P450 2d6 (cyp2d6) Substrates +3 Moderate
Interaction Summary
Theoretically, melatonin might increase levels of drugs metabolized by CYP1A2.
Read the full Melatonin + Acetaminophen, Chlorpheniramine, Codeine, Phenylephrine interactionAcetaminophen, Chlorpheniramine, DextromethorphanCoricidin II Extra Strength Cold and Flu
How Acetaminophen, Chlorpheniramine, Dextromethorphan interacts with Melatonin 10 mg — through 1 ingredient. Tap an ingredient for the detail:
MelatoninCytochrome P450 2d6 (cyp2d6) Substrates, Cytochrome P450 1a2 (cyp1a2) Substrates +2 Moderate
Interaction Summary
Theoretically, melatonin might increase levels of drugs metabolized by CYP2D6.
Read the full Melatonin + Acetaminophen, Chlorpheniramine, Dextromethorphan interactionAcetaminophen, Chlorpheniramine, Dextromethorphan HydrobromideCoricidin HBP Maximum Strength Flu
How Acetaminophen, Chlorpheniramine, Dextromethorphan Hydrobromide interacts with Melatonin 10 mg — through 1 ingredient. Tap an ingredient for the detail:
MelatoninCytochrome P450 3a4 (cyp3a4) Substrates, Cytochrome P450 1a2 (cyp1a2) Substrates +2 Moderate
Interaction Summary
Theoretically, melatonin might increase levels of drugs metabolized by CYP3A4.
Read the full Melatonin + Acetaminophen, Chlorpheniramine, Dextromethorphan Hydrobromide interactionAcetaminophen, Chlorpheniramine, Dextromethorphan, PhenylpropanolamineMulti Symptom Cold Relief
How Acetaminophen, Chlorpheniramine, Dextromethorphan, Phenylpropanolamine interacts with Melatonin 10 mg — through 1 ingredient. Tap an ingredient for the detail:
MelatoninCytochrome P450 1a2 (cyp1a2) Substrates, Cytochrome P450 2d6 (cyp2d6) Substrates +2 Moderate
Interaction Summary
Theoretically, melatonin might increase levels of drugs metabolized by CYP1A2.
Read the full Melatonin + Acetaminophen, Chlorpheniramine, Dextromethorphan, Phenylpropanolamine interactionAcetaminophen, Chlorpheniramine, Dextromethorphan, PseudoephedrineChildren's Tylenol Cold Plus Cough, Tylenol Cold Ex Strength
How Acetaminophen, Chlorpheniramine, Dextromethorphan, Pseudoephedrine interacts with Melatonin 10 mg — through 1 ingredient. Tap an ingredient for the detail:
MelatoninCytochrome P450 3a4 (cyp3a4) Substrates, Cytochrome P450 2d6 (cyp2d6) Substrates +2 Moderate
Interaction Summary
Theoretically, melatonin might increase levels of drugs metabolized by CYP3A4.
Read the full Melatonin + Acetaminophen, Chlorpheniramine, Dextromethorphan, Pseudoephedrine interactionAcetaminophen, Chlorpheniramine, Guaifenesin, Phenylephrine, SalicylamideRhinogesic GG
How Acetaminophen, Chlorpheniramine, Guaifenesin, Phenylephrine, Salicylamide interacts with Melatonin 10 mg — through 1 ingredient. Tap an ingredient for the detail:
MelatoninCytochrome P450 1a2 (cyp1a2) Substrates, Seizure Threshold Lowering Drugs +1 Moderate
Interaction Summary
Theoretically, melatonin might increase levels of drugs metabolized by CYP1A2.
Read the full Melatonin + Acetaminophen, Chlorpheniramine, Guaifenesin, Phenylephrine, Salicylamide interactionAcetaminophen, Chlorpheniramine, PhenylephrineAlka-Seltzer PLUS, Histex SR, Protid
How Acetaminophen, Chlorpheniramine, Phenylephrine interacts with Melatonin 10 mg — through 1 ingredient. Tap an ingredient for the detail:
MelatoninCytochrome P450 3a4 (cyp3a4) Substrates, Seizure Threshold Lowering Drugs +1 Moderate
Interaction Summary
Theoretically, melatonin might increase levels of drugs metabolized by CYP3A4.
Read the full Melatonin + Acetaminophen, Chlorpheniramine, Phenylephrine interactionEach ingredient & the kinds of drugs it affects
For each ingredient in Melatonin 10 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.
Melatonin
Anticoagulant/Antiplatelet Drugs
Theoretically, melatonin may have anticoagulant effects and may increase the risk of bleeding if used with anticoagulant or antiplatelet drugs.
There are isolated case reports of minor bleeding and decreased prothrombin activity in people taking melatonin with warfarin (Coumadin). The mechanism, if any, of this interaction is unknown. Taking melatonin orally seems to decrease coagulation activity within one hour of dosing in healthy men.
Anticonvulsants
Theoretically, melatonin may reduce the effects of anticonvulsants. Some clinical research suggests that melatonin may increase the frequency of seizures in certain patients, particularly children with neurological impairment.
Antidiabetes Drugs
Theoretically, taking melatonin with antidiabetes drugs might increase the risk of hypoglycemia.
Some clinical research shows that melatonin reduces levels of fasting blood glucose and improves glycemic control. However, other research suggests that melatonin might impair glucose utilization and increase insulin resistance, while other research has found no effect on glucose levels. Until more is known, use melatonin cautiously in combination with antidiabetes drugs.
Antihypertensive Drugs
Theoretically, taking melatonin with antihypertensive drugs might increase the risk of hypotension or hypertension.
Some clinical research suggests that taking melatonin decreases blood pressure in healthy adults. Also, melatonin seems to lower systolic and diastolic blood pressure in individuals with high blood pressure at nighttime or untreated essential hypertension. However, melatonin seems to worsen blood pressure in patients who are taking antihypertensive medications. Immediate-release melatonin 5 mg at night in combination with nifedipine GITS (Procardia XL) increases systolic blood pressure an average of 6.5 mmHg, diastolic blood pressure by an average of 4.9 mmHg, and heart rate by 3.9 bpm. Also, results from animal research suggest that melatonin reduces the effectiveness of certain antihypertensive drugs, including methoxamine and clonidine.
Caffeine
Theoretically, taking caffeine with melatonin might increase levels of melatonin.
Some evidence suggests that caffeine consumption can decrease endogenous melatonin levels, while other evidence suggests that caffeine increases endogenous melatonin levels. When administered in combination with melatonin supplements, caffeine seems to increase melatonin effects and levels. The reason for this discrepancy is not completely clear. Part of the discrepancy may result from the fact that caffeine can inhibit melatonin synthesis as well as inhibit melatonin metabolism. By functioning as an adenosine receptor antagonist, caffeine may indirectly inhibit the synthesis of melatonin. Conversely, because melatonin and caffeine are both metabolized by cytochrome P450 1A2 (CYP1A2) enzyme, concomitant use of melatonin and caffeine may reduce the metabolism of melatonin, resulting in higher serum levels.
Cns Depressants
Theoretically, taking melatonin might increase the sedative effects of CNS depressants.
Melatonin has sedative effects. Theoretically, concomitant use of melatonin with alcohol, benzodiazepines, or other sedative drugs might cause additive sedation.
Contraceptive Drugs
Theoretically, taking contraceptive drugs with melatonin might increase the effects and adverse effects of melatonin.
Contraceptive drugs can increase the levels of endogenous melatonin. Theoretically, these drugs may increase the effects and adverse effects of oral melatonin.
Cytochrome P450 1A2 (Cyp1A2) Substrates
Theoretically, melatonin might increase levels of drugs metabolized by CYP1A2. Also, other CYP1A2 substrates might decrease the metabolism of melatonin, increasing melatonin levels.
Melatonin is metabolized in the liver primarily by the CYP2C19 and CYP1A2 enzymes. Theoretically, combined administration of melatonin with drugs metabolized by the CYP1A2 enzyme might reduce the metabolism of these drugs, resulting in increased serum levels. Conversely, some drugs metabolized by CYP1A2 may inhibit the metabolism of melatonin, resulting in increased serum levels of melatonin. Until more is known, use melatonin cautiously in patients taking drugs metabolized by these enzymes.
Cytochrome P450 2C19 (Cyp2C19) Substrates
Theoretically, melatonin might increase levels of drugs metabolized by CYP2C19. Also, other CYP2C19 substrates might decrease the metabolism of melatonin, increasing melatonin levels.
Melatonin is metabolized in the liver primarily by the CYP2C19 and CYP1A2 enzymes. Theoretically, combined administration of melatonin with certain drugs metabolized by the CYP2C19 enzyme may reduce the metabolism of these drugs, resulting in increased serum levels. Conversely, some drugs metabolized by CYP2C19 may inhibit the metabolism of melatonin, resulting in increased serum levels of melatonin. Until more is known, use melatonin cautiously in patients taking drugs metabolized by these enzymes.
Fluvoxamine (Luvox)
Theoretically, taking fluvoxamine with melatonin might increase levels of melatonin.
Fluvoxamine can significantly increase melatonin levels. In some cases, fluvoxamine might increase bioavailability of exogenously administered melatonin by up to 20 times. Some researchers think this might be a beneficial interaction and be potentially useful for cases of refractory insomnia. However, this interaction might also cause unwanted excessive drowsiness and possibly other adverse effects. Fluvoxamine is known to increase endogenous melatonin secretion. It seems to increase serum levels of exogenously administered melatonin possibly by decreasing melatonin metabolism by inhibiting cytochrome P450 (CYP450) 1A2 and 2C19 or by inhibiting melatonin elimination. This effect has been found in healthy people taking fluvoxamine 50-75 mg and melatonin 5 mg.
Immunosuppressants
Theoretically, melatonin might interfere with immunosuppressive therapy.
Melatonin can stimulate immune function. Theoretically, melatonin might interfere with immunosuppressive therapy.
Methamphetamine (Desoxyn)
Theoretically, taking melatonin with methamphetamine may increase the adverse effects of methamphetamine.
Animal research suggests that melatonin exacerbates the adverse effects of methamphetamine, resulting in greater depression of tryptophan hydroxylase (TPH) and tyrosine hydroxylase (TH) activity, as well as a significant reduction in dopamine levels. This has not been shown in humans.
Nifedipine Gits (Procardia Xl)
Theoretically, taking melatonin with extended release nifedipine reduces the effects of nifedipine.
Melatonin can decrease the effectiveness of extended release nifedipine (GITS). Immediate-release melatonin 5 mg at night in combination with nifedipine GITS 30-60 mg daily increases systolic and blood pressure by an average of 6.5 mmHg and 4.9 mmHg, respectively. Concomitant use with melatonin also increases heart rate by 3.9 bpm. The mechanism of this interaction is not known.
Seizure Threshold Lowering Drugs
Theoretically, taking melatonin with drugs that lower the seizure threshold might increase the risk of seizure activity.
Some clinical evidence suggests that melatonin may increase the frequency of seizures in certain patients, particularly children with neurological disabilities.
Warfarin (Coumadin)
Theoretically, melatonin may have antiplatelet effects and may increase the risk of bleeding with warfarin.
Three cases of increased prothrombin time have been reported for patients aged 48-72 years who took melatonin orally in combination with warfarin. However, three cases of decreased prothrombin time have also been reported for patients aged 51-84 years who took melatonin orally in combination with warfarin. Until more is known, use melatonin cautiously in patients taking warfarin.
Cytochrome P450 2D6 (Cyp2D6) Substrates
Theoretically, melatonin might increase levels of drugs metabolized by CYP2D6.
Laboratory research suggests that certain lots of melatonin inhibit CYP2D6. Theoretically, combined administration of melatonin with certain drugs metabolized by the CYP2D6 enzyme may reduce the metabolism of these drugs, resulting in increased serum levels. Until more is known, use melatonin cautiously in patients taking drugs metabolized by these enzymes.
Cytochrome P450 3A4 (Cyp3A4) Substrates
Theoretically, melatonin might increase levels of drugs metabolized by CYP3A4.
Laboratory research shows that certain lots of melatonin inhibit CYP3A4. Theoretically, combined administration of melatonin with certain drugs metabolized by CYP3A4 may reduce the metabolism of these drugs, resulting in increased serum levels. Until more is known, use melatonin cautiously in patients taking drugs metabolized by these enzymes.
Flumazenil (Romazicon)
Theoretically, taking flumazenil with melatonin might reduce the effects of melatonin.
Animal research shows that flumazenil may inhibit the effect of melatonin.
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 Melatonin 10 mg, from the product label.
OL Olympian Labs
See all OL Olympian Labs products- Name
- Olympian Labs, Inc.
- City
- Phoenix
- State
- AZ
- ZipCode
- 85027
- Phone Number
- 1.800.473.5883
- Web Address
- www.olympianlabs.com
Melatonin 10 mg by OL Olympian Labs: Common Questions
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Written and reviewed by the HelloPharmacist editorial staff. Our editorial policy
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Label information is sourced from the NIH Dietary Supplement Label Database and reflects the product version on file; always read your actual product label. This page is for education only and is not a substitute for professional medical advice. Confirm with your pharmacist or doctor before combining supplements and medications.
The Full Monographs Behind Melatonin 10 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 monographMelatonin
Interacts with 1,461 drugsMelatonin is a hormone your body makes naturally to help control your sleep-wake cycle, and the supplement form is widely used to help with sleep timing problems and jet lag. The evidence is...
Read the full Melatonin monograph →Sources & How We Checked
Melatonin 10 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 150 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
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