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Dietary supplement

Phosphatidyl-Serine Capsules Ingredients & Drug Interactions

by Douglas Laboratories

Phosphatidyl-Serine Capsules label
See full label image
Capsule Category: Non-nutrient/non-botanical
Most serious interaction: Moderate
Clinical methodology reviewed by · Updated Sep 16, 2026 · Label data from the NIH DSLD
What is this page for?

First and foremost: checking Phosphatidyl-Serine Capsules 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

The interaction bottom line Most serious interaction: Moderate

Phosphatidyl-Serine Capsules is a dietary supplement by Douglas Laboratories with 1 active ingredient. Its ingredients are commonly taken for memory and cognitive support, age-related cognitive decline, attention and focus (adhd).Based on those ingredients, 219 medications have a known interaction with it, the most serious rated moderate. The ingredients most likely to interact are Phosphatidylserine. Use the checker below to test your specific medication, or read the full HelloPharmacist Interaction Report.

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Check Your Meds Against Phosphatidyl-Serine Capsules by Douglas Laboratories

Ask about any prescription or over-the-counter medication and we check it for interactions with Phosphatidyl-Serine Capsules by Douglas Laboratories — and tell you which ingredient is responsible.

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HelloPharmacist Scorecard of Phosphatidyl-Serine Capsules 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.

From our pharmacy team — supplement deep dive

Generated from HelloPharmacist’s pharmacist-curated databases and editorial rules · Last generated Sep 3, 2026

What’s inside

Full disclosure
Ingredient Transparency · database check
Full

Every active ingredient lists its own amount on the label.

Why this rating?
  • The label discloses an exact amount for 1 of its 1 active ingredient.
  • No proprietary blends here — you can verify the dose of every single component.

This product contains a single active ingredient: phosphatidylserine, a naturally occurring compound found in cell membranes throughout your body. The capsule itself is made from gelatin and filled with inactive ingredients including cellulose, silica, and vegetable stearate.

Does it work?

Moderate evidence
Evidence for Intended Use · database check
By FDA rules, dietary supplements can’t claim to treat, cure, or prevent disease — so labels speak in careful marketing language. We discern each product’s intended use from its name, label claims, and label statements, then grade the clinical evidence for that use. How these ratings are computed

This product doesn't appear to be marketed for a specific use, so we graded Phosphatidylserine's overall clinical evidence instead.

Moderate

Some clinical evidence supports Phosphatidylserine for:

Why this rating?
  • We looked at the product name, claims, and label statements and couldn't find a stated purpose to grade.
  • Since the label doesn't commit to one use, we graded the ingredient's overall clinical evidence instead.
  • On file: Age-related cognitive decline — rated "Possibly Effective" (Natural Medicines).
  • On file: Alzheimer disease — rated "Possibly Effective" (Natural Medicines).

Phosphatidylserine is possibly effective for age-related cognitive decline and Alzheimer disease, meaning there's some evidence it may help but more research would strengthen that claim. For athletic performance, ADHD, general cognitive function, and dementia, the evidence we hold is insufficient to rate its effectiveness — we don't have enough reliable data to say one way or the other.

The evidence, ingredient by ingredient Phosphatidylserine

How safe is it?

Well-documented data
Safety Information · database check
Well characterized

Adverse-effect, pregnancy, and general safety data are on file for most of these ingredients.

Why this rating?
  • We hold adverse-effect (side-effect) data for 1 of the 1 matched ingredient.
  • Pregnancy & breastfeeding safety ratings cover 1 of 1.
  • General safety write-ups exist for 1 of 1.
  • Remember: this measures how much safety information exists. Thin data is not the same as being safe.

Phosphatidylserine is generally well tolerated when taken by mouth, though long-term safety hasn't been fully studied. The most common side effects reported in studies are flatulence, gastrointestinal upset, headache, insomnia, and nausea.

Insomnia is more likely at higher doses around 600 mg, and gastrointestinal upset can occur at doses of 200–300 mg daily. There isn't enough safety information to recommend this product during pregnancy, so it's best avoided then.

Safety while breastfeeding is also unknown, so avoidance is recommended. Talk with your doctor or pharmacist about whether this product is right for your situation.

Side effects, ingredient by ingredient Phosphatidylserine

Meds to double-check

Moderate interaction found
Known Interaction Concern · database check
Moderate identified

The most serious documented interaction for these ingredients is Moderate. Check your medications for a personalized result.

Why this rating?
  • 1 of the 1 matched ingredient can interact with medications — Phosphatidylserine.
  • The most serious interaction on file is rated Moderate.
  • For scale: 219 individual medications appear in the full list. A big number alone doesn't make a product dangerous — what matters is whether YOUR medication is on it, so run yours through the interaction checker on this page.

Check with your doctor or pharmacist before using this product if you take anticholinergic drugs (used for overactive bladder, Parkinson's disease, and certain poisonings) or cholinergic drugs — both carry moderate-severity interaction risks with phosphatidylserine. Use the medication checker on this page to confirm your specific medications.

Check your own medication Run your meds through the checker above

The bottom line

Scorecard at a glanceFully disclosed formula with some supporting evidence behind its ingredients' uses. Moderate medication interactions have been identified, and safety information is well characterized.

Phosphatidyl-Serine Capsules may be worth considering if you're looking for support with age-related cognitive decline or Alzheimer disease, though the evidence is modest. If you take anticholinergic or cholinergic medications, check your exact drugs with your doctor or pharmacist before starting — the interactions are theoretical but documented.

Pregnant and breastfeeding individuals should avoid it. Talk it over with your own healthcare provider to see if it fits your needs.

Educational only — not medical advice; always confirm with your pharmacist. Our editorial policy · How we use AI

Assessment coverage: 1 of 1 active ingredient matched to our full ingredient reviews (monographs). Based on the product label dated Feb 24, 2017.

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

At a glance

General information

Key facts about Phosphatidyl-Serine Capsules, straight from the product label.

Brand Douglas Laboratories
Barcode (UPC) 310539013168
Net contents 60 Capsule(s)
Market status On market
Date entered into DSLD Feb 24, 2017
DSLD ID 70393
Product type Non-nutrient/non-botanical
Supplement form Capsule
Dietary claims / uses All Other
Intended target group(s) Adult (18 - 50 Years), Gluten Free, Dairy Free, Sugar Free
From the label
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 Phosphatidyl-Serine Capsules by Douglas Laboratories, sourced from the NIH Dietary Supplement Label Database.

Supplement Facts

Daily Value (DV) Target Group(s):
Adults and children 4 or more years of age
Minimum serving Sizes:
1 Capsule(s)
Maximum serving Sizes:
1 Capsule(s)
Servings per container
60
UPC/BARCODE
310539013168
IngredientAmount% DV
Phosphatidylserine100 mg--

Other ingredients: Cellulose, Gelatin, Silica, Vegetable Stearate

Tap any ingredient to jump to its full detail below.

Label statements
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

This product contains no yeast, wheat gluten, milk/dairy, corn, sodium, sugar, starch, artificial coloring, artificial preservatives, artificial flavoring or genetically modified organisms (GMOs).

Suggested/Recommended/Usage/Directions

Suggested Usage: As a dietary supplement, adults take 1 capsule daily, or as directed by your healthcare professional.

Precautions

Keep out of reach of children.

Tamper resistant package, do not use if outer seal is missing.

Storage

For optimal storage conditions, store in a cool, dry place. (59(0)-77(0)F/15(0)-25(0)C) (35-65% relative humidity)

General

Formula #83004

FDA Statement of Identity

A Dietary Supplement

Is this label outdated? Report a formula or label change and our pharmacy team will review it.

See for yourself

Phosphatidyl-Serine Capsules by Douglas Laboratories label

The label scan from the NIH Dietary Supplement Label Database. Tap to enlarge.

Phosphatidyl-Serine Capsules label

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)
What’s inside

The Ingredients in Phosphatidyl-Serine Capsules by Douglas Laboratories

This is the 1 active ingredient this product is made of. Select it to open its full monograph.

Serving size1 Capsule(s) Dosage formCapsule Servings per container60 Amounts shown are per serving.

Phosphatidylserine

Interacts with
219 drugs
100 mg per serving Form: Soy

Phosphatidylserine is a natural fat-like compound found in cell membranes, especially in the brain, and it is sold mainly to support memory and thinki...

Phosphatidylserine monograph & interactions

Other (inactive) ingredients: Cellulose, Gelatin, Silica, Vegetable Stearate. These complete the product’s ingredient list but are not active constituents.

Interaction report

Phosphatidyl-Serine Capsules by Douglas Laboratories Drug Interactions

Want to check YOUR meds against Phosphatidyl-Serine Capsules?

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 checker
219Drugs
219 Moderate

Ingredients driving the most interactions

Phosphatidylserine 219

Individual Drug Interactions

The ingredients in Phosphatidyl-Serine Capsules interact with 219 drugs. Click any drug to see the details.

1 of the 1 ingredient in Phosphatidyl-Serine Capsules interact with drugs. Each result below shows which ingredient is responsible. Phosphatidylserine

Each ingredient & the kinds of drugs it affects

For each ingredient in Phosphatidyl-Serine Capsules with known interactions, here are the types of medications it can affect. Open any type for the detail — or search your exact drug in the checker above.

Phosphatidylserine2 drug types · 219 drugs

Anticholinergic Drugs

Theoretically, phosphatidylserine might decrease the effectiveness anticholinergic drugs.
Phosphatidylserine is thought to increase acetylcholine levels, which could theoretically interfere with the activity of anticholinergic agents.

Likelihood Possible Evidence B
Cholinergic Drugs

Theoretically, phosphatidylserine might have additive effects with cholinergic drugs.
Phosphatidylserine is thought to increase acetylcholine levels, which could theoretically lead to additive cholinergic effects when used with cholinergic drugs.

Likelihood Possible Evidence B
Phosphatidylserine full monograph & interactions
The maker

Brand information

Manufacturer and brand details for Phosphatidyl-Serine Capsules, 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
Pharmacist Counseling Corner

Phosphatidyl-Serine Capsules by Douglas Laboratories: Common Questions

Does Phosphatidyl-Serine Capsules by Douglas Laboratories interact with any medications?
Yes. Based on its ingredients, Phosphatidyl-Serine Capsules has a known interaction with 219 medications. Use the checker to see how it interacts with a specific drug.
How can one product interact with so many drugs?
Phosphatidyl-Serine Capsules contains a single active ingredient, and that one ingredient can interact with many different medications on its own. We check it against each medication and show the mechanism responsible.
Where does this information come from?
The product label data comes from the NIH Dietary Supplement Label Database (DSLD); the interaction data is built on the Natural Medicines database and reviewed by HelloPharmacist pharmacists.
Can I take phosphatidylserine if I'm pregnant or breastfeeding?
No — there isn't enough safety data to recommend it during pregnancy, so avoidance is advised. Safety while breastfeeding is also unknown, and avoidance is recommended. Talk with your doctor or pharmacist about your individual situation.
What are the common side effects?
Flatulence, gastrointestinal upset, headache, insomnia, and nausea have been reported. Insomnia is more likely at higher doses around 600 mg, and gastrointestinal upset can happen at doses of 200–300 mg daily. Most people tolerate it well overall.
Does phosphatidylserine really help with memory or cognitive decline?
It's possibly effective for age-related cognitive decline and Alzheimer disease, meaning there's some supporting evidence but it's not definitive. For general cognitive function, ADHD, athletic performance, and dementia, we don't have enough reliable data to say whether it works.
What is phosphatidylserine, and what does it do in my body?
Phosphatidylserine is a naturally occurring compound found in cell membranes throughout your body. It's thought to play a role in brain function and is believed to work partly by increasing acetylcholine, a chemical messenger in the brain.
How long has phosphatidylserine been studied for safety?
While it's generally well tolerated in the studies that have been done, long-term safety hasn't been fully established. If you're thinking of taking it for months or years, that's worth discussing with your doctor or pharmacist.

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.

Phosphatidyl-Serine Capsules label
Go deeper

The Full Monographs Behind Phosphatidyl-Serine Capsules’s Ingredients

Every ingredient we hold a full HelloPharmacist monograph for — uses, evidence, safety, and the complete interaction list.

Herb & supplement monograph

Phosphatidylserine

Interacts with 219 drugs

Phosphatidylserine is a natural fat-like compound found in cell membranes, especially in the brain, and it is sold mainly to support memory and thinking. Some research suggests possible bene...

Read the full Phosphatidylserine monograph →
Sources

Sources & How We Checked

Phosphatidyl-Serine Capsules'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.

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 9 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.

Phosphatidylserine 9 references
  1. Crook T, Petrie W, Wells C, Massari DC. Effects of phosphatidylserine in Alzheimer's disease. Psychopharmacol Bull 1992;28:61-6.
  2. Pepping J. Phosphatidylserine. Am J Health-Syst Pharm 1999;56:2038,2043-4.
  3. Kidd PM. Phosphatidylserine; Membrane nutrient for memory. A clinical and mechanistic assessment. Altern Med Rev 1996;1:70-84.
  4. Kim HY, Akbar M, Lau A, et al. Inhibition of neuronal apoptosis by docosahexaenoic acid (22:6n-3). Role of phosphatidylserine in antiapoptotic effect. J Biol Chem 2000;275:35215-23.. PubMed
  5. Zanotti A, Valzelli L, Toffano G. Chronic phosphatidylserine treatment improves spatial memory and passive avoidance in aged rats. Psychopharmacology (Berl) 1989;99:316-21.. PubMed
  6. Schreiber S, Kampf-Sherf O, Gorfine M, et al. An open trial of plant-source derived phosphatydilserine for treatment of age-related cognitive decline. Isr J Psychiatry Relat Sci 2000;37:302-7.
  7. Pepping, J. Phosphatidylserine. Am J Health Syst.Pharm. 10-15-1999;56(20):2038, 2043-2038, 2044.
  8. Monteverde, A., Gnemmi, P., Rossi, F., Monteverde, A., and Finali, G. C. Selegiline in the treatment of mild to moderate Alzheimer-type dementia. Clin.Ther 1990;12(4):315-322.
  9. Vakhapova V, Cohen T, Richter Y, Herzog Y, Kam Y, Korczyn AD. Phosphatidylserine containing omega-3 Fatty acids may improve memory abilities in nondemented elderly individuals with memory complaints: results from an open-label extension study. Dement Geri PubMed

See these in context on the Phosphatidylserine monograph →

Parts of this content are provided by the Therapeutic Research Center, LLC.

DISCLAIMER: Currently this does not check for drug-drug interactions. This is not an all-inclusive comprehensive list of potential interactions and is for informational purposes only. Not all interactions are known or well-reported in the scientific literature, and new interactions are continually being reported. Input is needed from a qualified healthcare provider including a pharmacist before starting any therapy. Application of clinical judgment is necessary.

© 2021 Therapeutic Research Center, LLC

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