Sereniten Plus Ingredients & Drug Interactions
What is this page for?
First and foremost: checking Sereniten Plus 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
Sereniten Plus is a dietary supplement by Douglas Laboratories with 3 active ingredients. Its ingredients are commonly taken for bone health and osteoporosis, correcting vitamin d deficiency, immune system support.Based on those ingredients, 1,027 medications have a known interaction with it, the most serious rated moderate. The ingredients most likely to interact are Vitamin D3, L-Theanine, Casein Decapeptide. Use the checker below to test your specific medication, or read the full HelloPharmacist Interaction Report.
Check Your Meds Against Sereniten Plus by Douglas Laboratories
Ask about any prescription or over-the-counter medication and we check it for interactions with Sereniten Plus by Douglas Laboratories — 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 Sereniten Plus by Douglas Laboratories
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
Sereniten Plus has 3 active ingredients. Vitamin D3 is a fat-soluble vitamin your body uses to absorb calcium and maintain bone health and immune function.
L-theanine is an amino acid derived from tea leaves that may support calm focus and cognitive function. Casein decapeptide is a small protein fragment from milk that research suggests may help with certain allergic skin conditions and food sensitivities.
The product also contains inactive ingredients — microcrystalline cellulose, hydroxypropyl methylcellulose, and silica — which are binding and filling agents common in capsule formulas.
Does it work?
Strong evidence
Vitamin D3 is well-established as effective for treating rickets, osteomalacia (soft bones), renal bone disease, familial hypophosphatemia (a genetic disorder affecting phosphate metabolism), and hypoparathyroidism. L-theanine shows possibly effective evidence for cognitive function, but the evidence for age-related cognitive decline, Alzheimer's disease, anxiety, OCD, and cancer is insufficient to rate.
Casein decapeptide is rated likely effective for atopic dermatitis (eczema), food allergies, and atopic disease (a tendency toward allergic conditions).
How safe is it?
Well-documented data
Vitamin D3 is generally well tolerated at recommended doses; however, very high doses over time can cause toxicity with symptoms of high blood calcium, bone loss, and in rare cases, eye and kidney problems. Safety data during pregnancy is mixed — it's often used at recommended amounts but only under your doctor's guidance, and higher amounts require medical supervision.
During breastfeeding, vitamin D3 is generally considered acceptable at recommended doses. L-theanine is well tolerated for short-term use in healthy adults but has limited long-term safety data; the safety data advises against it during pregnancy and breastfeeding.
Casein decapeptide is generally well tolerated in healthy adults, though people with milk allergies should avoid it, and supplement-level doses haven't been extensively studied. Reported side effects of L-theanine include headaches, drowsiness, and increased dream activity.
Meds to double-check
Moderate interaction found
Before taking Sereniten Plus, double-check with your doctor or pharmacist if you're on heart rhythm medications (especially digoxin, verapamil, or diltiazem), blood pressure drugs, thiazide water pills, cholesterol medications like atorvastatin, or any products containing aluminum. The vitamin D3 and casein decapeptide in this formula can potentiate blood pressure-lowering drugs, and vitamin D at high doses carries moderate risks with several cardiac and kidney-related medications.
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.
Sereniten Plus may be worth considering if you're looking for vitamin D support, or if you're interested in casein peptides for food sensitivities or eczema. However, if you take any heart medications (especially digoxin or rhythm-control drugs), blood pressure drugs, cholesterol medications, or aluminum-containing products, check with your doctor or pharmacist before starting — the vitamin D3 content creates multiple interaction risks.
Similarly, if you're pregnant or breastfeeding, talk it over with your healthcare provider first.
Educational only — not medical advice; always confirm with your pharmacist. Our editorial policy · How we use AI
Assessment coverage: 3 of 3 active ingredients matched to our full ingredient reviews (monographs). Based on the product label dated Feb 25, 2021.
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 Sereniten Plus, straight from the product label.
| Brand | Douglas Laboratories |
|---|---|
| Barcode (UPC) | 310539977507 |
| Net contents | 60 Vegetarian Capsule(s) |
| Market status | On market |
| Date entered into DSLD | Feb 25, 2021 |
| DSLD ID | 245463 |
| Product type | Other Combinations |
| Supplement form | Capsule |
| Dietary claims / uses | All Other, Structure/Function |
| Intended target group(s) | 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 Sereniten Plus by Douglas Laboratories, sourced from the NIH Dietary Supplement Label Database.
Supplement Facts
| Ingredient | Amount | % DV |
|---|---|---|
| Vitamin D3 | 2.5 mcg | 13% |
| L-Theanine | 50 mg | -- |
| Casein Decapeptide | 175 mg | -- |
Other ingredients: Microcrystalline Cellulose, Hydroxypropyl Methylcellulose, Silica
Tap any ingredient to jump to its full detail below.
These statements are the manufacturer’s wording, reproduced from the product label — the label is saying it, not HelloPharmacist. We don’t verify or endorse them.
Suggested/Recommended/Usage/Directions
Suggested Usage: As a dietary supplement, adults take 1 capsule daily on an empty stomach or as directed by your health professional.
Precautions
Warning: If you are pregnant, nursing, have any health condition or taking any medication, consult your health professional before using this product.
Keep out of the reach of children.
Use only if safety seal is intact.
Contains: Milk
Brand IP Statement(s)
Lactium is a registered trademark used under license. Suntheanine is a registered trademark of Taiyo International Inc.
Storage
Store in a cool, dry place.
Formulation
Gluten-free, Non-GMO
Stress management and metabolic support
FDA Disclaimer Statement
This statement has not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease.
General Statements
Contents may not fill package in order to accommodate required labeling. Please rely on stated quantity. Scan to learn about our manufacturing excellence
FDA Statement of Identity
Dietary Supplement
Is this label outdated? Report a formula or label change and our pharmacy team will review it.
Sereniten Plus by Douglas Laboratories 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 Sereniten Plus by Douglas Laboratories
These are the 3 active ingredients this product is made of. Select any to open its full monograph.
Serving size1 Vegetarian Capsule(s) Dosage formCapsule 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 D3
Interacts with715 drugs
Vitamin D is a fat-soluble vitamin that helps your body absorb calcium and is important for healthy bones, muscles, and immune function. Many people,...
Vitamin D3 monograph & interactionsL-Theanine
Interacts with565 drugs
Theanine (usually L-theanine) is an amino acid found naturally in tea leaves that many people take to feel calmer and less stressed without strong dro...
L-Theanine monograph & interactionsCasein Decapeptide
Interacts with172 drugs
Casein peptides are small protein fragments made from milk casein, often studied for mild blood pressure support and relaxation. The evidence is limit...
Casein Decapeptide monograph & interactionsOther (inactive) ingredients: Microcrystalline Cellulose, Hydroxypropyl Methylcellulose, Silica. These complete the product’s ingredient list but are not active constituents.
Sereniten Plus by Douglas Laboratories Drug Interactions
HelloPharmacist Interaction Report
Sereniten Plus by Douglas Laboratories contains three active ingredients that together interact with a substantial number of medications.
The most serious concern comes from vitamin D3: at high doses, it can raise blood calcium levels (hypercalcemia), which reduces how well heart rhythm medications like verapamil and diltiazem work, and can trigger dangerous irregular heartbeats if you're taking digoxin. Altogether, these interactions span 1,028 individual medications.
Read the full breakdown — every affected drug type, severity by severity
Vitamin D3 also has moderate interactions with thiazide water pills (which decrease how much calcium your body loses in urine), certain cholesterol drugs like atorvastatin (which vitamin D may reduce in your bloodstream), and aluminum-containing products — though the aluminum concern mainly affects people with kidney failure. It may also speed up how your body processes some drugs broken down by a liver enzyme called CYP3A4.
L-theanine may lower blood pressure, so combining it with blood pressure medications could amplify their effect. It may also add to the sedating effects of drugs that depress the central nervous system, and there's some theoretical concern about interactions with serotonin-related drugs, though clinical reports of problems are absent so far.
Casein decapeptide, derived from milk protein, can also lower blood pressure and might increase the effect of antihypertensive drugs. Before you start Sereniten Plus, check your exact medications using the search tool on this page.
Check your own medications below · Editorial policy · How we use AI
Want to check YOUR meds against Sereniten Plus?
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 Sereniten Plus interact with 1,027 drugs. Click any drug to see the details.
3 of the 3 ingredients in Sereniten Plus interact with drugs. Each result below shows which ingredient is responsible. Vitamin D3 L-Theanine Casein Decapeptide
TimololBlocadren, Timol, Timoptic
How Timolol interacts with Sereniten Plus — through 2 ingredients. Tap an ingredient for the detail:
L-theanineAntihypertensive Drugs Moderate
Interaction Summary
Theanine might lower blood pressure, potentiating the effects of antihypertensive drugs.
Read the full L-theanine + Timolol interactionCasein DecapeptideAntihypertensive Drugs Moderate
Interaction Summary
Theoretically, combining these casein peptides with antihypertensive drugs might increase the risk of hypotension.
Read the full Casein Decapeptide + Timolol interactionTorsemideDemadex, Soaanz
How Torsemide interacts with Sereniten Plus — through 2 ingredients. Tap an ingredient for the detail:
Casein DecapeptideAntihypertensive Drugs Moderate
Interaction Summary
Theoretically, combining these casein peptides with antihypertensive drugs might increase the risk of hypotension.
Read the full Casein Decapeptide + Torsemide interactionL-theanineAntihypertensive Drugs Moderate
Interaction Summary
Theanine might lower blood pressure, potentiating the effects of antihypertensive drugs.
Read the full L-theanine + Torsemide interactionTrandolaprilMavik
How Trandolapril interacts with Sereniten Plus — through 2 ingredients. Tap an ingredient for the detail:
Casein DecapeptideAntihypertensive Drugs Moderate
Interaction Summary
Theoretically, combining these casein peptides with antihypertensive drugs might increase the risk of hypotension.
Read the full Casein Decapeptide + Trandolapril interactionL-theanineAntihypertensive Drugs Moderate
Interaction Summary
Theanine might lower blood pressure, potentiating the effects of antihypertensive drugs.
Read the full L-theanine + Trandolapril interactionTrandolapril, VerapamilTarka
How Trandolapril, Verapamil interacts with Sereniten Plus — through 3 ingredients. Tap an ingredient for the detail:
L-theanineAntihypertensive Drugs Moderate
Interaction Summary
Theanine might lower blood pressure, potentiating the effects of antihypertensive drugs.
Read the full L-theanine + Trandolapril, Verapamil interactionVitamin D3Verapamil (calan, Others), Cytochrome P450 3a4 (cyp3a4) Substrates Moderate
Interaction Summary
Hypercalcemia induced by high-dose vitamin D can reduce the therapeutic effects of verapamil for arrhythmia.
Read the full Vitamin D3 + Trandolapril, Verapamil interactionCasein DecapeptideAntihypertensive Drugs Moderate
Interaction Summary
Theoretically, combining these casein peptides with antihypertensive drugs might increase the risk of hypotension.
Read the full Casein Decapeptide + Trandolapril, Verapamil interactionTreprostinil
How Treprostinil interacts with Sereniten Plus — through 2 ingredients. Tap an ingredient for the detail:
L-theanineAntihypertensive Drugs Moderate
Interaction Summary
Theanine might lower blood pressure, potentiating the effects of antihypertensive drugs.
Read the full L-theanine + Treprostinil interactionCasein DecapeptideAntihypertensive Drugs Moderate
Interaction Summary
Theoretically, combining these casein peptides with antihypertensive drugs might increase the risk of hypotension.
Read the full Casein Decapeptide + Treprostinil interactionTreprostinil (inh)Tyvaso
How Treprostinil (inh) interacts with Sereniten Plus — through 2 ingredients. Tap an ingredient for the detail:
Casein DecapeptideAntihypertensive Drugs Moderate
Interaction Summary
Theoretically, combining these casein peptides with antihypertensive drugs might increase the risk of hypotension.
Read the full Casein Decapeptide + Treprostinil (inh) interactionL-theanineAntihypertensive Drugs Moderate
Interaction Summary
Theanine might lower blood pressure, potentiating the effects of antihypertensive drugs.
Read the full L-theanine + Treprostinil (inh) interactionTreprostinil (oral)Orenitram, Remodulin
How Treprostinil (oral) interacts with Sereniten Plus — through 2 ingredients. Tap an ingredient for the detail:
L-theanineAntihypertensive Drugs Moderate
Interaction Summary
Theanine might lower blood pressure, potentiating the effects of antihypertensive drugs.
Read the full L-theanine + Treprostinil (oral) interactionCasein DecapeptideAntihypertensive Drugs Moderate
Interaction Summary
Theoretically, combining these casein peptides with antihypertensive drugs might increase the risk of hypotension.
Read the full Casein Decapeptide + Treprostinil (oral) interactionTriamtereneDyrenium
How Triamterene interacts with Sereniten Plus — through 2 ingredients. Tap an ingredient for the detail:
Casein DecapeptideAntihypertensive Drugs Moderate
Interaction Summary
Theoretically, combining these casein peptides with antihypertensive drugs might increase the risk of hypotension.
Read the full Casein Decapeptide + Triamterene interactionL-theanineAntihypertensive Drugs Moderate
Interaction Summary
Theanine might lower blood pressure, potentiating the effects of antihypertensive drugs.
Read the full L-theanine + Triamterene interactionTrichlormethiazideAq 4B Aquazide, Marazide II, Metahydrin, Naqua
How Trichlormethiazide interacts with Sereniten Plus — through 3 ingredients. Tap an ingredient for the detail:
Vitamin D3Thiazide Diuretics Moderate
Interaction Summary
Theoretically, taking thiazide diuretics and high-dose vitamin D can increase the risk of hypercalcemia.
Read the full Vitamin D3 + Trichlormethiazide interactionL-theanineAntihypertensive Drugs Moderate
Interaction Summary
Theanine might lower blood pressure, potentiating the effects of antihypertensive drugs.
Read the full L-theanine + Trichlormethiazide interactionCasein DecapeptideAntihypertensive Drugs Moderate
Interaction Summary
Theoretically, combining these casein peptides with antihypertensive drugs might increase the risk of hypotension.
Read the full Casein Decapeptide + Trichlormethiazide interactionTrimethaphanArfonad
How Trimethaphan interacts with Sereniten Plus — through 2 ingredients. Tap an ingredient for the detail:
Casein DecapeptideAntihypertensive Drugs Moderate
Interaction Summary
Theoretically, combining these casein peptides with antihypertensive drugs might increase the risk of hypotension.
Read the full Casein Decapeptide + Trimethaphan interactionL-theanineAntihypertensive Drugs Moderate
Interaction Summary
Theanine might lower blood pressure, potentiating the effects of antihypertensive drugs.
Read the full L-theanine + Trimethaphan interactionUreaUreaphil
How Urea interacts with Sereniten Plus — through 2 ingredients. Tap an ingredient for the detail:
Casein DecapeptideAntihypertensive Drugs Moderate
Interaction Summary
Theoretically, combining these casein peptides with antihypertensive drugs might increase the risk of hypotension.
Read the full Casein Decapeptide + Urea interactionL-theanineAntihypertensive Drugs Moderate
Interaction Summary
Theanine might lower blood pressure, potentiating the effects of antihypertensive drugs.
Read the full L-theanine + Urea interactionValsartanDiovan, Prexxartan
How Valsartan interacts with Sereniten Plus — through 2 ingredients. Tap an ingredient for the detail:
L-theanineAntihypertensive Drugs Moderate
Interaction Summary
Theanine might lower blood pressure, potentiating the effects of antihypertensive drugs.
Read the full L-theanine + Valsartan interactionCasein DecapeptideAntihypertensive Drugs Moderate
Interaction Summary
Theoretically, combining these casein peptides with antihypertensive drugs might increase the risk of hypotension.
Read the full Casein Decapeptide + Valsartan interactionVerapamilCalan, Calan SR, Covera HS, Isoptin, Isoptin SR, Veramil +3 more
How Verapamil interacts with Sereniten Plus — through 3 ingredients. Tap an ingredient for the detail:
Casein DecapeptideAntihypertensive Drugs Moderate
Interaction Summary
Theoretically, combining these casein peptides with antihypertensive drugs might increase the risk of hypotension.
Read the full Casein Decapeptide + Verapamil interactionVitamin D3Verapamil (calan, Others), Cytochrome P450 3a4 (cyp3a4) Substrates Moderate
Interaction Summary
Hypercalcemia induced by high-dose vitamin D can reduce the therapeutic effects of verapamil for arrhythmia.
Read the full Vitamin D3 + Verapamil interactionL-theanineAntihypertensive Drugs Moderate
Interaction Summary
Theanine might lower blood pressure, potentiating the effects of antihypertensive drugs.
Read the full L-theanine + Verapamil interactionAdo-trastuzumab EmtansineKadcyla
How Ado-trastuzumab Emtansine interacts with Sereniten Plus — through 1 ingredient. Tap an ingredient for the detail:
Vitamin D3Cytochrome P450 3a4 (cyp3a4) Substrates Minor
Interaction Summary
Vitamin D might induce CYP3A4 enzymes and reduce the bioavailability of CYP3A4 substrates.
Read the full Vitamin D3 + Ado-trastuzumab Emtansine interactionAbemaciclibVerzenio
How Abemaciclib interacts with Sereniten Plus — through 1 ingredient. Tap an ingredient for the detail:
Vitamin D3Cytochrome P450 3a4 (cyp3a4) Substrates Minor
Interaction Summary
Vitamin D might induce CYP3A4 enzymes and reduce the bioavailability of CYP3A4 substrates.
Read the full Vitamin D3 + Abemaciclib interactionAbiraterone
How Abiraterone interacts with Sereniten Plus — through 1 ingredient. Tap an ingredient for the detail:
Vitamin D3Cytochrome P450 3a4 (cyp3a4) Substrates Minor
Interaction Summary
Vitamin D might induce CYP3A4 enzymes and reduce the bioavailability of CYP3A4 substrates.
Read the full Vitamin D3 + Abiraterone interactionAbiraterone AcetateYonsa, Zytiga
How Abiraterone Acetate interacts with Sereniten Plus — through 1 ingredient. Tap an ingredient for the detail:
Vitamin D3Cytochrome P450 3a4 (cyp3a4) Substrates Minor
Interaction Summary
Vitamin D might induce CYP3A4 enzymes and reduce the bioavailability of CYP3A4 substrates.
Read the full Vitamin D3 + Abiraterone Acetate interactionAcalabrutinibCalquence
How Acalabrutinib interacts with Sereniten Plus — through 1 ingredient. Tap an ingredient for the detail:
Vitamin D3Cytochrome P450 3a4 (cyp3a4) Substrates Minor
Interaction Summary
Vitamin D might induce CYP3A4 enzymes and reduce the bioavailability of CYP3A4 substrates.
Read the full Vitamin D3 + Acalabrutinib interactionAcepromazineAtravet
How Acepromazine interacts with Sereniten Plus — through 1 ingredient. Tap an ingredient for the detail:
L-theanineCns Depressants Minor
Interaction Summary
Theoretically, theanine might have additive sedative effects when used in conjunction with CNS depressants.
Read the full L-theanine + Acepromazine interactionAcetaminophen, Aspirin, CaffeineExcedrin, Excedrin Extra Strength, Excedrin Migraine
How Acetaminophen, Aspirin, Caffeine interacts with Sereniten Plus — through 1 ingredient. Tap an ingredient for the detail:
Vitamin D3Cytochrome P450 3a4 (cyp3a4) Substrates Minor
Interaction Summary
Vitamin D might induce CYP3A4 enzymes and reduce the bioavailability of CYP3A4 substrates.
Read the full Vitamin D3 + Acetaminophen, Aspirin, Caffeine interactionAcetaminophen, Butalbital, CaffeineEsgic, Esgic Plus, Fiogesic, Fioricet, Repan, Tecnal +1 more
How Acetaminophen, Butalbital, Caffeine interacts with Sereniten Plus — through 1 ingredient. Tap an ingredient for the detail:
Vitamin D3Cytochrome P450 3a4 (cyp3a4) Substrates Minor
Interaction Summary
Vitamin D might induce CYP3A4 enzymes and reduce the bioavailability of CYP3A4 substrates.
Read the full Vitamin D3 + Acetaminophen, Butalbital, Caffeine interactionAcetaminophen, Butalbital, Caffeine, CodeineEsgic with Codeine, Fioricet w/ Codeine
How Acetaminophen, Butalbital, Caffeine, Codeine interacts with Sereniten Plus — through 2 ingredients. Tap an ingredient for the detail:
Vitamin D3Cytochrome P450 3a4 (cyp3a4) Substrates Minor
Interaction Summary
Vitamin D might induce CYP3A4 enzymes and reduce the bioavailability of CYP3A4 substrates.
Read the full Vitamin D3 + Acetaminophen, Butalbital, Caffeine, Codeine interactionL-theanineCns Depressants Minor
Interaction Summary
Theoretically, theanine might have additive sedative effects when used in conjunction with CNS depressants.
Read the full L-theanine + Acetaminophen, Butalbital, Caffeine, Codeine interactionAcetaminophen, Butalbital, CodeineBancap w/ Codeine
How Acetaminophen, Butalbital, Codeine interacts with Sereniten Plus — through 1 ingredient. Tap an ingredient for the detail:
L-theanineCns Depressants Minor
Interaction Summary
Theoretically, theanine might have additive sedative effects when used in conjunction with CNS depressants.
Read the full L-theanine + Acetaminophen, Butalbital, Codeine interactionAcetaminophen, Butalbital, Codeine PhosphatePhrenilin #3
How Acetaminophen, Butalbital, Codeine Phosphate interacts with Sereniten Plus — through 1 ingredient. Tap an ingredient for the detail:
L-theanineCns Depressants Minor
Interaction Summary
Theoretically, theanine might have additive sedative effects when used in conjunction with CNS depressants.
Read the full L-theanine + Acetaminophen, Butalbital, Codeine Phosphate interactionAcetaminophen, Caffeine, Chlorpheniramine, Hydrocodone, PhenylephrineHycomine Compound
How Acetaminophen, Caffeine, Chlorpheniramine, Hydrocodone, Phenylephrine interacts with Sereniten Plus — through 2 ingredients. Tap an ingredient for the detail:
L-theanineCns Depressants Minor
Interaction Summary
Theoretically, theanine might have additive sedative effects when used in conjunction with CNS depressants.
Read the full L-theanine + Acetaminophen, Caffeine, Chlorpheniramine, Hydrocodone, Phenylephrine interactionVitamin D3Cytochrome P450 3a4 (cyp3a4) Substrates Minor
Interaction Summary
Vitamin D might induce CYP3A4 enzymes and reduce the bioavailability of CYP3A4 substrates.
Read the full Vitamin D3 + 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 Sereniten Plus — through 2 ingredients. Tap an ingredient for the detail:
Vitamin D3Cytochrome P450 3a4 (cyp3a4) Substrates Minor
Interaction Summary
Vitamin D might induce CYP3A4 enzymes and reduce the bioavailability of CYP3A4 substrates.
Read the full Vitamin D3 + Acetaminophen, Caffeine, Codeine interactionL-theanineCns Depressants Minor
Interaction Summary
Theoretically, theanine might have additive sedative effects when used in conjunction with CNS depressants.
Read the full L-theanine + Acetaminophen, Caffeine, Codeine interactionAcetaminophen, Caffeine, Codeine, SalicylamideCodalan No.1, Codalan No.2, Codalan No.3
How Acetaminophen, Caffeine, Codeine, Salicylamide interacts with Sereniten Plus — through 2 ingredients. Tap an ingredient for the detail:
L-theanineCns Depressants Minor
Interaction Summary
Theoretically, theanine might have additive sedative effects when used in conjunction with CNS depressants.
Read the full L-theanine + Acetaminophen, Caffeine, Codeine, Salicylamide interactionVitamin D3Cytochrome P450 3a4 (cyp3a4) Substrates Minor
Interaction Summary
Vitamin D might induce CYP3A4 enzymes and reduce the bioavailability of CYP3A4 substrates.
Read the full Vitamin D3 + Acetaminophen, Caffeine, Codeine, Salicylamide interactionAcetaminophen, Caffeine, DihydrocodeineDHC Plus, Panlor DC, Panlor SS
How Acetaminophen, Caffeine, Dihydrocodeine interacts with Sereniten Plus — through 2 ingredients. Tap an ingredient for the detail:
Vitamin D3Cytochrome P450 3a4 (cyp3a4) Substrates Minor
Interaction Summary
Vitamin D might induce CYP3A4 enzymes and reduce the bioavailability of CYP3A4 substrates.
Read the full Vitamin D3 + Acetaminophen, Caffeine, Dihydrocodeine interactionL-theanineCns Depressants Minor
Interaction Summary
Theoretically, theanine might have additive sedative effects when used in conjunction with CNS depressants.
Read the full L-theanine + Acetaminophen, Caffeine, Dihydrocodeine interactionAcetaminophen, Caffeine, IsomethepteneMigralam
How Acetaminophen, Caffeine, Isometheptene interacts with Sereniten Plus — through 1 ingredient. Tap an ingredient for the detail:
Vitamin D3Cytochrome P450 3a4 (cyp3a4) Substrates Minor
Interaction Summary
Vitamin D might induce CYP3A4 enzymes and reduce the bioavailability of CYP3A4 substrates.
Read the full Vitamin D3 + Acetaminophen, Caffeine, Isometheptene interactionAcetaminophen, Caffeine, PyrilamineMidol Max Strength Menstrual
How Acetaminophen, Caffeine, Pyrilamine interacts with Sereniten Plus — through 1 ingredient. Tap an ingredient for the detail:
Vitamin D3Cytochrome P450 3a4 (cyp3a4) Substrates Minor
Interaction Summary
Vitamin D might induce CYP3A4 enzymes and reduce the bioavailability of CYP3A4 substrates.
Read the full Vitamin D3 + Acetaminophen, Caffeine, Pyrilamine interactionEach ingredient & the kinds of drugs it affects
For each ingredient in Sereniten Plus 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.
Vitamin D3
Aluminum
Vitamin D might increase aluminum absorption and toxicity, but this has only been reported in people with renal failure.
The protein that transports calcium across the intestinal wall can also bind and transport aluminum. This protein is stimulated by vitamin D, which may therefore increase aluminum absorption. This mechanism may contribute to increased aluminum levels and toxicity in people with renal failure, when they take vitamin D and aluminum-containing phosphate binders chronically.
Atorvastatin (Lipitor)
Vitamin D might reduce absorption of atorvastatin.
A small, low-quality clinical study shows that taking vitamin D reduces levels of atorvastatin and its active metabolites by up to 55%. However, while atorvastatin levels decreased, total cholesterol, low-density lipoprotein (LDL) cholesterol, and high-density lipoprotein (HDL) cholesterol levels did not substantially change. Atorvastatin is metabolized in the gut by CYP3A4 enzymes, and researchers theorized that vitamin D might induce CYP3A4, causing reduced levels of atorvastatin. However, this proposed mechanism was not specifically studied.
Calcipotriene (Dovonex)
Taking calcipotriene with vitamin D increases the risk for hypercalcemia.
Calcipotriene is a vitamin D analog used topically for psoriasis. It can be absorbed in sufficient amounts to cause systemic effects, including hypercalcemia. Theoretically, combining calcipotriene with vitamin D supplements might increase the risk of hypercalcemia.
Digoxin (Lanoxin)
Theoretically, hypercalcemia induced by high-dose vitamin D can increase the risk of arrhythmia from digoxin.
High doses of vitamin D can cause hypercalcemia. Hypercalcemia increases the risk of fatal cardiac arrhythmias with digoxin. Avoid vitamin D doses above the tolerable upper intake level (4000 IU daily for adults) and monitor serum calcium levels in people taking vitamin D and digoxin concurrently.
Diltiazem (Cardizem, Others)
Theoretically, hypercalcemia induced by high-dose vitamin D can reduce the therapeutic effects of diltiazem for arrhythmia.
High doses of vitamin D can cause hypercalcemia. Hypercalcemia can reduce the effectiveness of verapamil in atrial fibrillation. Theoretically this could also occur with diltiazem. Avoid vitamin D doses above the tolerable upper intake level (4000 IU daily for adults) and monitor serum calcium levels in people taking vitamin D and diltiazem concurrently.
Thiazide Diuretics
Theoretically, taking thiazide diuretics and high-dose vitamin D can increase the risk of hypercalcemia.
Thiazide diuretics decrease urinary calcium excretion, which could lead to hypercalcemia if vitamin D supplements are taken concurrently. This has been reported in people being treated with vitamin D for hypoparathyroidism, and also in elderly people with normal parathyroid function who were taking a thiazide, vitamin D, and calcium-containing antacids daily.
Verapamil (Calan, Others)
Hypercalcemia induced by high-dose vitamin D can reduce the therapeutic effects of verapamil for arrhythmia.
Hypercalcemia due to high doses of vitamin D can reduce the effectiveness of verapamil in atrial fibrillation. Avoid vitamin D doses above the tolerable upper intake level (4000 IU daily for adults) and monitor serum calcium levels in people taking vitamin D and verapamil concurrently.
Cytochrome P450 3A4 (Cyp3A4) Substrates
Vitamin D might induce CYP3A4 enzymes and reduce the bioavailability of CYP3A4 substrates.
There is some concern that vitamin D might induce CYP3A4. In vitro research suggests that vitamin D induces CYP3A4 transcription. Additionally, observational research has found that increased UV light exposure and serum vitamin D levels are associated with decreased serum levels of CYP3A4 substrates such as tacrolimus and sirolimus, while no association between UV light exposure or vitamin D levels and levels of mycophenolic acid, a non-CYP3A4 substrate, was found. A small, low-quality clinical study shows that taking vitamin D reduces levels of the CYP3A4 substrate atorvastatin and its active metabolites by up to 55%; however, the clinical effects of atorvastatin were not reduced. While researchers theorized that vitamin D might induce CYP3A4, this proposed mechanism was not specifically studied.
L-Theanine
Antihypertensive Drugs
Theanine might lower blood pressure, potentiating the effects of antihypertensive drugs.
Animal research shows that theanine can lower blood pressure in spontaneously hypertensive animals. Theoretically, concomitant use of theanine and antihypertensive drugs might potentiate the antihypertensive activity.
Cns Depressants
Theoretically, theanine might have additive sedative effects when used in conjunction with CNS depressants. However, it is unclear if this concern is clinically relevant.
Theoretically, theanine may compete with glutamate and/or increase plasma gamma-aminobutyric acid (GABA) levels, which could cause CNS depression. In one clinical study, some subjects taking oral theanine reported drowsiness.
Serotonergic Drugs
Clinical studies regarding the effects of L-theanine on serotonin levels are conflicting. Some studies suggest it can increase serotonin levels in the brain while others report that it may decrease them. Nevertheless, there have been no reports of l-theanine being a causative agent in serotonergic-related side effects or serotonin syndrome.
Casein Decapeptide
Antihypertensive Drugs
Theoretically, combining these casein peptides with antihypertensive drugs might increase the risk of hypotension.
Clinical research shows that some casein peptides, including the lactotripeptides isoleucine-proline-proline (IPP) and valine-proline-proline (VPP), can modestly reduce blood pressure in patients with hypertension.
Brand information
Manufacturer and brand details for Sereniten Plus, from the product label.
Douglas Laboratories
See all Douglas Laboratories products- Name
- Douglas Laboratories
- Street Address
- 600 Boyce Road
- City
- Pittsburgh
- State
- PA
- ZipCode
- 15205
- Phone Number
- 1.800.245.4440
- Web Address
- www.douglaslabs.com
Sereniten Plus by Douglas Laboratories: Common Questions
Does Sereniten Plus by Douglas Laboratories interact with any medications?
How can one product interact with so many drugs?
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What's casein decapeptide, and why is it in here?
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Can vitamin D3 at the dose in Sereniten Plus cause toxicity?
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 Sereniten Plus’s Ingredients
Every ingredient we hold a full HelloPharmacist monograph for — uses, evidence, safety, and the complete interaction list.
Vitamin D
Interacts with 715 drugsVitamin D is a fat-soluble vitamin that helps your body absorb calcium and is important for healthy bones, muscles, and immune function. Many people, especially those with low sun exposure,...
Read the full Vitamin D monograph → Herb & supplement monographTheanine
Interacts with 565 drugsTheanine (usually L-theanine) is an amino acid found naturally in tea leaves that many people take to feel calmer and less stressed without strong drowsiness. Early research suggests it may...
Read the full Theanine monograph → Herb & supplement monographCasein Peptides
Interacts with 172 drugsCasein peptides are small protein fragments made from milk casein, often studied for mild blood pressure support and relaxation. The evidence is limited and mostly modest, so they should not...
Read the full Casein Peptides monograph →Sources & How We Checked
Sereniten Plus'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 36 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 D 26 references
- McEvoy GK, ed. AHFS Drug Information. Bethesda, MD: American Society of Health-System Pharmacists, 1998.
- Tatro DS, ed. Drug Interactions Facts. Facts and Comparisons Inc., St. Louis, MO. 1999.
- Koutkia P, Chen TC, Holick MF. Vitamin D intoxication associated with an over-the-counter supplement. N Engl J Med 2001;345:66-7. PubMed
- Bar-Or D, Yoel G. Calcium and calciferol antagonize effect of verapamil in atrial fibrillation. Br Med J 1981;282:1585-6.
- Demontis R, Leflon A, Fournier A, et al. 1 alpha(OH) vitamin D3 increases plasma aluminum in hemodialyzed patients taking AI(OH)3. Clin Nephrol 1986;26:146-9.
- Crowe M, Wollner L, Griffiths RA. Hypercalcemia following vitamin D and thiazide therapy in the elderly. Practitioner 1984;228:312-3.
- Parfitt AM. Thiazide-induced hypercalcemia in vitamin D-treated hypoparathyroidism. Ann Intern Med 1972;77:557-63. PubMed
- Thiazide diuretics and the risk of osteoporosis. Pharmacist's Letter/Prescriber's Letter 2003;19(11):191105.
- Moon J. The role of vitamin D in toxic metal absorption. J Am Coll Nutr 1994;13:559-64.
- Demontis R, Reissi D, Noel C, et al. Indirect clinical evidence that 1alphaOH vitamin D<SUB>3</SUB> increases the intestinal absorption of aluminum. Clin Nephrol 1989;31:123-7.
- Adler AJ, Berlyne GM. Duodenal aluminum absorption in the rat: effect of vitamin D. Am J Physiol 1985;249:G209-13. PubMed
- Schwartz JB. Effects of vitamin D supplementation in atorvastatin-treated patients: A new drug interaction with an unexpected consequence. Clin Pharmacol Ther 2009;85:198-203. PubMed
- Dietary reference intakes for calcium and vitamin D. Institute of Medicine, November 30, 2010. Available at: http://www.iom.edu/~/media/Files/Report%20Files/2010/Dietary-Reference-Intakes-for-Calcium-and-Vitamin-D/Vitamin%20D%20and%20Calcium%202010%20Repo
- Cox KA, Dunn MA. Aluminum toxicity alters the regulation of calbindin-D28k protein and mRNA expression in chick intestine. J Nutr 2001;131:2007-13. PubMed
- Escribano, J., Balaguer, A., Pagone, F., Feliu, A., and Roque, I. Figuls. Pharmacological interventions for preventing complications in idiopathic hypercalciuria. Cochrane.Database.Syst.Rev. 2009;(1):CD004754. PubMed
- Carlton, S., Clopton, D., and Cappuzzo, K. A. Vitamin D deficiency: appropriate replenishment therapies and the effects of vitamin D toxicity. Consult Pharm 2010;25(3):171-177. PubMed
- Wang, H., Xia, N., Yang, Y., and Peng, D. Q. Influence of vitamin D supplementation on plasma lipid profiles: a meta-analysis of randomized controlled trials. Lipids Health Dis. 2012;11:42. PubMed
- Turner AN, Carr Reese P, Fields KS, Anderson J, Ervin M, Davis JA, Fichorova RN, Roberts MW, Klebanoff MA, Jackson RD. A blinded, randomized controlled trial of high-dose vitamin D supplementation to reduce recurrence of bacterial vaginosis. Am J Obstet G PubMed
- Weiner M, Epstein FH. Signs and symptoms of electrolyte disorders. Yale J Biol Med. 1970;43(2):76-109.
- Lappe J, Watson P, Travers-Gustafson D, Recker R, Garland C, Gorham E, Baggerly K, McDonnell SL. Effect of Vitamin D and Calcium Supplementation on Cancer Incidence in Older Women: A Randomized Clinical Trial. JAMA. 2017 Mar 28;317(12):1234-1243. PubMed
- Roth DE, Leung M, Mesfin E, Qamar H, Watterworth J, Papp E. Vitamin D supplementation during pregnancy: state of the evidence from a systematic review of randomised trials. BMJ. 2017;359:j5237. PubMed
- Murai IH, Fernandes AL, Sales LP, et al. Effect of a single high dose of vitamin D3 on hospital length of stay in patients with moderate to severe COVID-19: A randomized clinical trial. JAMA. 2021.
- Wang Z, Schuetz EG, Xu Y, Thummel KE. Interplay between vitamin D and the drug metabolizing enzyme CYP3A4. J Steroid Biochem Mol Biol 2013;136:54-8. PubMed
- Doyle D, Browne U, Brickley A, Murphy D. Vitamin D-induced hypercalcaemia and acute kidney injury in sarcoidosis. BMJ Case Rep 2023;16(1):e250580. PubMed
- Williamson A, Martineau AR, Sheikh A, Jolliffe D, Griffiths CJ. Vitamin D for the management of asthma. Cochrane Database Syst Rev 2023;2(2):CD011511. PubMed
- Kinesya E, Santoso D, Gde Arya N, et al. Vitamin D as adjuvant therapy for diabetic foot ulcers: Systematic review and meta-analysis approach. Clin Nutr ESPEN 2023;54:137-143. PubMed
Theanine 6 references
- Yokogoshi H, Kobayashi M. Hypotensive effect of gamma-glutamylethylamide in spontaneously hypertensive rats. Life Sci 1998;62:1065-8.
- Haskell, C. F., Kennedy, D. O., Milne, A. L., Wesnes, K. A., and Scholey, A. B. The effects of L-theanine, caffeine and their combination on cognition and mood. Biol.Psychol. 2008;77(2):113-122. PubMed
- Yokogoshi, H., Kato, Y., Sagesaka, Y. M., Takihara-Matsuura, T., Kakuda, T., and Takeuchi, N. Reduction effect of theanine on blood pressure and brain 5-hydroxyindoles in spontaneously hypertensive rats. Biosci.Biotechnol.Biochem. 1995;59(4):615-618. PubMed
- Lyon MR, Kapoor MP, Juneja LR. The effects of L-theanine (Suntheanine®) on objective sleep quality in boys with attention deficit hyperactivity disorder (ADHD): a randomized, double-blind, placebo-controlled clinical trial. Altern Med Rev. 2011;16(4):348-
- Hidese S, Ota M, Wakabayashi C, et al. Effects of chronic l-theanine administration in patients with major depressive disorder: an open-label study. Acta Neuropsychiatr 2017;29(2):72-9.
- Tsuchiya T, Honda H, Oikawa M, et al. Oral administration of the amino acids cystine and theanine attenuates the adverse events of S-1 adjuvant chemotherapy in gastrointestinal cancer patients. Int J Clin Oncol 2016;21(6):1085-90. PubMed
Casein Peptides 4 references
- Cicero AFG, Aubin F, Azais-Braesco V, Borghi C. Do the lactotripeptides isoleucine-proline-proline and valine-proline-proline reduce systolic blood pressure in European subjects? A meta-analysis of randomized controlled trials. Am J Hypertens. 2013;26(3): PubMed
- Fekete AA, Givens DA, Lovegrove JA. Casein-derived lactotripeptides reduce systolic and diastolic blood pressure in a meta-analysis of randomised clinical trials. Nutrients. 2015;7(1):659-81. PubMed
- Qin LQ, Xu JY, Dong JY, Zhao Y, van Bladeren P, Zhang W. Lactotripeptides intake and blood pressure management: a meta-analysis of randomised controlled clinical trials. Nutr Metab Cardiovasc Dis. 2013;23(5):395-402. PubMed
- Turpeinen AM, Järvenpää S, Kautiainen H, Korpela R, Vapaatalo H. Antihypertensive effects of bioactive tripeptides-a random effects meta-analysis. Ann Med. 2013;45(1):51-6. PubMed
Parts of this content are provided by the Therapeutic Research Center, LLC.
DISCLAIMER: Currently this does not check for drug-drug interactions. This is not an all-inclusive comprehensive list of potential interactions and is for informational purposes only. Not all interactions are known or well-reported in the scientific literature, and new interactions are continually being reported. Input is needed from a qualified healthcare provider including a pharmacist before starting any therapy. Application of clinical judgment is necessary.
© 2021 Therapeutic Research Center, LLC