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Dietary supplement

Passion Flower Ingredients & Drug Interactions

by Wonder Labs

Passion Flower label
See full label image
Capsule Category: 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 Passion Flower 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

Passion Flower is a dietary supplement by Wonder Labs with 1 active ingredient. Its ingredients are commonly taken for anxiety and stress, trouble sleeping, restlessness.Based on those ingredients, 836 medications have a known interaction with it, the most serious rated moderate. The ingredients most likely to interact are Passion Flower extract. Use the checker below to test your specific medication, or read the full HelloPharmacist Interaction Report.

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Check Your Meds Against Passion Flower by Wonder Labs

Ask about any prescription or over-the-counter medication and we check it for interactions with Passion Flower by Wonder Labs — and tell you which ingredient is responsible.

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HelloPharmacist Scorecard of Passion Flower by Wonder 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.

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 one active ingredient: passion flower extract. The capsules also hold several inactive ingredients — vegetable cellulose, gelatin, silica, and vegetable magnesium stearate — which serve as the capsule shell and flow agents.

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
Moderate

Some clinical evidence supports this product's ingredients for its stated purpose, but it isn't conclusive.

Why this rating?
  • The label markets this product for: relaxing herbal formula for calm.
  • We looked for evidence on: Stress, Pre-procedural anxiety, Insomnia, anxiety, nervousness, restlessness.
  • The strongest evidence on file: Passion Flower is rated "Possibly Effective" for Pre-procedural anxiety (Natural Medicines).
  • Also on file: Passion Flower is rated "Possibly Effective" for Insomnia.
  • Also on file: Passion Flower is rated "Insufficient Reliable Evidence To Rate" for Stress.

Passion flower is rated Possibly Effective for insomnia and for relieving anxiety before medical procedures. For attention deficit-hyperactivity disorder (ADHD) and help with benzodiazepine withdrawal, the evidence isn't strong enough yet to know whether it works — we'd rate that Insufficient Reliable Evidence.

The evidence, ingredient by ingredient Passion Flower

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.

Passion flower is generally well tolerated in short-term use, but drowsiness is the main side effect to expect. The most common adverse effects include dizziness, confusion, and sedation.

A rare case of severe nausea, vomiting, and heart rhythm changes (prolonged QT interval) was reported at very high doses, and allergy-type symptoms including urticaria have occurred in isolated reports — though it's unclear in those cases whether passion flower alone was responsible. Don't use this product during pregnancy — the safety data isn't there, and it may affect your uterus.

There isn't enough safety information to recommend it while breastfeeding either. If you're pregnant, planning to become pregnant, or nursing, talk with your doctor or pharmacist before taking it.

Side effects, ingredient by ingredient Passion Flower

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 — Passion Flower.
  • The most serious interaction on file is rated Moderate.
  • For scale: 837 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 taking this product if you're on any sedative medications (like lorazepam or other sleep aids) — the drowsiness can stack. Also flag any drugs that are processed by your liver's CYP3A4 enzyme or rely on OATP transport proteins, though those risks are smaller.

Check your own medication Run your meds through the checker above

The bottom line

Scorecard at a glanceFully disclosed formula with some supporting evidence for its stated purpose. Moderate medication interactions have been identified, and safety information is well characterized.

Passion flower may help with insomnia or pre-procedure anxiety, but its main risk is adding to drowsiness if you're already on sedative medications. Before you start, check your exact prescriptions and any over-the-counter sleep aids or anxiety drugs with your doctor or pharmacist.

It's not for pregnancy or breastfeeding.

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 Nov 19, 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

At a glance

General information

Key facts about Passion Flower, straight from the product label.

Brand Wonder Labs
Net contents 90 Capsule(s)
Market status On market
Date entered into DSLD Nov 19, 2021
DSLD ID 260989
Product type Botanical
Supplement form Capsule
Dietary claims / uses All Other
Intended target group(s) Adult (18 - 50 Years), Kosher, Women (not pregnant or lactating), Gluten 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 Passion Flower by Wonder Labs, 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
90
IngredientAmount% DV
Passion Flower extract250 mg--

Other ingredients: Vegetable Cellulose, k-Gelatin, Silica, Vegetable Magnesium 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.
Suggested/Recommended/Usage/Directions

Directions: As a dietary supplement, take 1 capsule 1-3 times daily.

Precautions

Tamper evident: Do not use this product if imprinted foil seal under cap is broken or missing.

Keep out of reach of children.

Caution: Do not use this product if you are pregnant, nursing, having high blood pressure, heart disease or are taking any prescription medication.

Storage

Keep tightly closed. Store at room temperature: 59 degrees - 86 degrees F (15 degrees to 30 degrees C).

Seals/Symbols

FDA Registered Facility Certified GMP Good Manufacturing Practice USA Made

Ko Kosher Service

Formulation

Non-GMO Gluten free

Relaxing herbal formula

FDA Statement of Identity

Dietary Supplement

Formula

Ko Kosher Service

General Statements

Reorder #4792

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

See for yourself

Passion Flower by Wonder Labs label

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

Passion Flower 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 Passion Flower by Wonder Labs

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 container90 Amounts shown are per serving.

Passion Flower extract

Interacts with
836 drugs
250 mg per serving

Passion flower is a traditional calming herb that many people use for anxiety and sleep. Early studies hint it may help with mild anxiety and restless...

Passion Flower extract monograph & interactions

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

Interaction report

Passion Flower by Wonder Labs Drug Interactions

Want to check YOUR meds against Passion Flower?

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
836Drugs
248 Moderate 588 Minor

Ingredients driving the most interactions

Passion Flower extract 836

Individual Drug Interactions

The ingredients in Passion Flower interact with 836 drugs. Click any drug to see the details.

1 of the 1 ingredient in Passion Flower interact with drugs. Each result below shows which ingredient is responsible. Passion Flower extract

Each ingredient & the kinds of drugs it affects

For each ingredient in Passion Flower 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.

Passion Flower extract3 drug types · 836 drugs

Cns Depressants

Concomitant use of passion flower with sedative drugs might cause additive effects and side effects.
Research in animals and humans shows that passion flower has sedative effects which can be additive when used with sedative medications like lorazepam.

Likelihood Possible Evidence D
Cytochrome P450 3A4 (Cyp3A4) Substrates

Theoretically, passion flower might decrease the effects of CYP3A4 substrates.
In vitro research suggests that passion flower can induce CYP3A4 enzymes, albeit to a much lower degree than rifampin, a known CYP3A4 inducer.

Likelihood Possible Evidence D
Organic Anion-Transporting Polypeptide Substrates (Oatp)

Theoretically, passion flower might reduce the bioavailability of OATP2B1 and OATP1A2 substrates.
In vitro research shows that the passion flower constituents apigenin and vitexin inhibit OATP2B1 and OATP1A2. This inhibition may be dose-dependent. One specific high-flavonoid passion flower extract (Valverde) seems to inhibit OATP2B1 and OATP1A2, while another extract with a lower flavonoid concentration (Arkocaps) shows less potent inhibition. OATPs are responsible for the uptake of drugs and other compounds into the body; however, the specific activities of OATP2B1 and OATP1A2 are not well characterized.

Likelihood Possible Evidence D
Passion Flower extract full monograph & interactions
The maker

Brand information

Manufacturer and brand details for Passion Flower, from the product label.

Wonder Labs

See all Wonder Labs products
Name
Wonder Labs
Street Address
115 S.C.T. Court
City
White House
State
TN
ZipCode
37188
Phone Number
800.992.1672
Web Address
www.wonderlabs.com
Pharmacist Counseling Corner

Passion Flower by Wonder Labs: Common Questions

Does Passion Flower by Wonder Labs interact with any medications?
Yes. Based on its ingredients, Passion Flower has a known interaction with 836 medications. Use the checker to see how it interacts with a specific drug.
How can one product interact with so many drugs?
Passion Flower 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.
Will passion flower make me drowsy?
Yes, drowsiness is the most common side effect. That's actually why it may help with insomnia, but it means you should avoid driving or operating machinery until you know how it affects you. If you're already taking a sedative medication, the drowsiness can add up, so check with your pharmacist first.
Can I take this while pregnant or breastfeeding?
No — avoid it during pregnancy because safety data is lacking and it may affect your uterus. There's also not enough safety information during breastfeeding. Talk with your doctor or pharmacist about whether it's right for you if you're pregnant, planning to be, or nursing.
Does passion flower actually work for sleep?
The evidence says it's Possibly Effective for insomnia and for anxiety before procedures. That means there's some research backing it, but it's not a guarantee it'll work for you — response varies.
What should I watch out for when taking this?
The main one is mixing it with sedative drugs — that can make drowsiness worse. Also be alert for dizziness, confusion, or any allergy symptoms like rash or sinus irritation. If you're on medications metabolized by your liver (especially heart or blood pressure drugs), mention this supplement to your pharmacist so they can double-check there's no interference.
Is passion flower the same as passionflower tea?
This product is a concentrated extract in capsule form, so the dose is standardized and different from a typical tea. Always tell your doctor or pharmacist about both — the supplement and any herbal teas you're drinking — so they can account for the total amount you're getting.

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.

Passion Flower label
Go deeper

The Full Monographs Behind Passion Flower’s Ingredients

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

Herb & supplement monograph

Passion Flower

Interacts with 836 drugs

Passion flower is a traditional calming herb that many people use for anxiety and sleep. Early studies hint it may help with mild anxiety and restlessness, but the evidence is limited and mo...

Read the full Passion Flower monograph →
Sources

Sources & How We Checked

Passion Flower'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 19 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.

Passion Flower 19 references
  1. Newall CA, Anderson LA, Philpson JD. Herbal Medicine: A Guide for Healthcare Professionals. London, UK: The Pharmaceutical Press, 1996.
  2. The Review of Natural Products by Facts and Comparisons. St. Louis, MO: Wolters Kluwer Co., 1999.
  3. Fisher AA, Purcell P, Le Couteur DG. Toxicity of Passiflora incarnata L. J Toxicol Clin Toxicol 2000;38:63-6.
  4. Akhondzadeh S, Naghavi HR, Shayeganpour A, et al. Passionflower in the treatment of generalized anxiety: a pilot double-blind randomized controlled trial with oxazepam. J Clin Pharm Ther 2001;26:363-7. PubMed
  5. Farnsworth N, Bingel A, Cordell G, et al. Potential value of plants as sources of new antifertility agents I. J Pharm Sci 1975;64:535-98. DOI
  6. Mori A, Hasegawa K, Murasaki M, et al. Clinical evaluation of Passiflamin (passiflora extract) on neurosis - multicenter double blind study in comparison with mexazolam. Rinsho Hyoka (Clinical Evaluation) 1993;21:383-440.
  7. Miyasaka LS, Atallah AN, Soares BG. Passiflora for anxiety disorder. Cochrane Database Syst Rev 2007;(1):CD004518. DOI
  8. Speroni E., Minghetti A. Neuropharmacological activity of extracts from Passiflora incarnata. Planta Med. 1988;54:488-91.
  9. Capasso A., Sorrentino L. Pharmacological studies on the sedative and hypnotic effect of Kava kava and Passiflora extracts combination. Phytomedicine. 2005;12:39-45. PubMed
  10. Carrasco MC, Vallejo JR, Pardo-de-Santayana M, et al. Interactions of Valeriana officinalis L. and Passiflora incarnata L. in a patient treated with lorazepam. Phytother Res. 2009 Dec;23:1795-6.
  11. Smith, G. W., Chalmers, T. M., and Nuki, G. Vasculitis associated with herbal preparation containing Passiflora extract. Br J Rheumatol. 1993;32(1):87-88.
  12. Soulimani, R., Younos, C., Jarmouni, S., Bousta, D., Misslin, R., and Mortier, F. Behavioural effects of Passiflora incarnata L. and its indole alkaloid and flavonoid derivatives and maltol in the mouse. J Ethnopharmacol. 1997;57(1):11-20. PubMed
  13. Nojoumi M, Ghaeli P, Salimi S, Sharifi A, Raisi F. Effects of Passion Flower Extract, as an Add-On Treatment to Sertraline, on Reaction Time in Patients ?with Generalized Anxiety Disorder: A Double-Blind Placebo-Controlled Study. Iran J Psychiatry. 2016;1
  14. Rokhtabnak F, Ghodraty MR, Kholdebarin A, et al. Comparing the Effect of Preoperative Administration of Melatonin and Passiflora incarnata on Postoperative Cognitive Disorders in Adult Patients Undergoing Elective Surgery. Anesth Pain Med. 2016;7(1):e4123 PubMed
  15. Dantas LP, de Oliveira-Ribeiro A, de Almeida-Souza LM, Groppo FC. Effects of passiflora incarnata and midazolam for control of anxiety in patients undergoing dental extraction. Med Oral Patol Oral Cir Bucal. 2017;22(1):e95-e101. PubMed
  16. Ozturk Z, Kalayci CC. Pregnancy outcomes in psychiatric patients treated with passiflora incarnata. Complement Ther Med. 2018 Feb;36:30-32. PubMed
  17. da Cunha RS, Amorim KS, Gercina AC, et al. Herbal medicines as anxiolytics prior to third molar surgical extraction. A randomized controlled clinical trial. Clin Oral Investig. 2020. PubMed
  18. Schäfer AM, Gilgen PM, Spirgi C, et al. Constituents of Passiflora incarnata, but Not of Valeriana officinalis, Interact with the Organic Anion Transporting Polypeptides (OATP)2B1 and OATP1A2. Planta Med. 2021. PubMed
  19. Mazzari ALDA, Lacerda MG, Milton FA, et al. In vitro effects of European and Latin-American medicinal plants in CYP3A4 gene expression, glutathione levels, and P-glycoprotein activity. Front Pharmacol 2022;13:826395. PubMed

See these in context on the Passion Flower 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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