Interactions on record — worth a quick check against your medications. Check your meds →
Dietary supplement

Wild Lettuce and Passionflower Ingredients & Drug Interactions

by Hawaii Pharm

Wild Lettuce and Passionflower label
See full label image
Liquid 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 Wild Lettuce and Passionflower 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

Wild Lettuce and Passionflower is a dietary supplement by Hawaii Pharm with 2 active ingredients. Its ingredients are commonly taken for anxiety and stress, trouble sleeping, restlessness.Based on those ingredients, 926 medications have a known interaction with it, the most serious rated moderate. The ingredients most likely to interact are Passionflower Herb Extract, Dry, Wild Lettuce Herb Extract, Dry. Use the checker below to test your specific medication, or read the full HelloPharmacist Interaction Report.

Jump to a section

Check Your Meds Against Wild Lettuce and Passionflower by Hawaii Pharm

Ask about any prescription or over-the-counter medication and we check it for interactions with Wild Lettuce and Passionflower by Hawaii Pharm — and tell you which ingredient is responsible.

Pharmacist-reviewed data Checks every ingredient Answer in seconds
Prefer a human? Send your question to our licensed pharmacists — free, answered by email within 24 hours.

HelloPharmacist Scorecard of Wild Lettuce and Passionflower by Hawaii Pharm

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 Jul 11, 2026

What’s inside

Low disclosure
Ingredient Transparency · database check
Low

Most active ingredients don't disclose an individual amount — you can't tell how much of each you're getting.

Why this rating?
  • The label discloses an exact amount for 0 of its 2 active ingredients.
  • “Proprietary Extract Blend” is a proprietary blend — the label gives one combined amount (983 mg) without saying how much of each component you get.

This liquid contains 2 active ingredients: a proprietary extract blend (the specific herbs and amounts aren't broken down on the label) and dry extracts of passionflower herb and wild lettuce herb. The liquid base includes alcohol, water, and glycerin as inactive ingredients that help deliver the herbs in liquid form.

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: relaxation and sleep support.
  • We looked for evidence on: Insomnia, Muscle cramps, Stress, Nervousness, Restlessness, Sleep quality — and 1 related terms.
  • The strongest evidence on file: Passion Flower is rated "Possibly Effective" for Insomnia (Natural Medicines).
  • Also on file: Passion Flower is rated "Insufficient Reliable Evidence To Rate" for Muscle cramps, Stress.

Passionflower carries a "Possibly Effective" rating for short-term insomnia and pre-procedural anxiety — meaning some evidence backs its use for calming before medical procedures or to help with sleep, but the evidence isn't rock-solid. For alcohol use disorder and benzodon withdrawal, there isn't enough reliable evidence to rate it.

Wild lettuce has no established effectiveness ratings in our data, so we don't have enough information to say how well it works.

The evidence, ingredient by ingredient Passion Flower Wild Lettuce

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 2 of the 2 matched ingredients.
  • Pregnancy & breastfeeding safety ratings cover 2 of 2.
  • General safety write-ups exist for 2 of 2.
  • Remember: this measures how much safety information exists. Thin data is not the same as being safe.

Passionflower is generally well tolerated short-term but can cause drowsiness, dizziness, or confusion. The safety data advises against passionflower during pregnancy due to lack of safety testing and possible effects on the uterus, and there isn't enough information to know it's safe while breastfeeding.

Wild lettuce has limited human safety data; high doses have been linked to sweating, dizziness, rapid heartbeat, and more serious effects at very large amounts. Like passionflower, wild lettuce should be avoided during pregnancy and breastfeeding because there isn't enough safety information.

A single rare case reported severe nausea, vomiting, and heart rhythm changes after very high passionflower doses, which resolved after stopping.

Side effects, ingredient by ingredient Passion Flower Wild Lettuce

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?
  • 2 of the 2 matched ingredients can interact with medications — Wild Lettuce, Passion Flower.
  • The most serious interaction on file is rated Moderate.
  • For scale: 927 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 us before combining this with sedative or sleep-aid medications (Moderate severity with both ingredients), anticholinergic drugs like certain antihistamines or urinary medicines (Moderate with wild lettuce), or any drug processed through the liver enzyme OATP or CYP3A4 (Minor with passionflower). We have no interaction data for the proprietary blend component.

Check your own medication Run your meds through the checker above

The bottom line

Scorecard at a glanceFormula with limited ingredient disclosure with some supporting evidence for its stated purpose. Moderate medication interactions have been identified, and safety information is well characterized.

This product might be worth trying if you're looking to ease pre-procedure jitters or sleep trouble, though the evidence is modest. Don't use it if you take sedative medications, and steer clear during pregnancy or breastfeeding.

Check your medications with the tool on this page, and talk to your pharmacist about whether it fits your situation.

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

Assessment coverage: 2 of 2 active ingredients matched to our full ingredient reviews (monographs). Based on the product label dated Jun 25, 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

At a glance

General information

Key facts about Wild Lettuce and Passionflower, straight from the product label.

Brand Hawaii Pharm
Barcode (UPC) 840253664396
Net contents 4 Fluid Ounce(s); 120 Milliliter(s)
Market status On market
Date entered into DSLD Jun 25, 2025
DSLD ID 332111
Product type Botanical
Supplement form Liquid
Dietary claims / uses All Other, Structure/Function
Intended target group(s) Adult (18 - 50 Years), 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 Wild Lettuce and Passionflower by Hawaii Pharm, 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:
0.7 Milliliter(s)
Maximum serving Sizes:
1 Milliliter(s)
Servings per container
120
UPC/BARCODE
840253664396
IngredientAmount% DV
Proprietary Extract Blend983 mg--
Passionflower Herb Extract, Dry0 NP--
Wild Lettuce Herb Extract, Dry0 NP--

Other ingredients: Alcohol, Water, Glycerin

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.
Brand IP Statement(s)

Hawaii Pharm Herbal Extract Highest quality since 2008

Suggested/Recommended/Usage/Directions

Suggested use: Shake well, before using. For adults add about 20-30 drops (0.7-1 ml, one full squeeze of the dropper bulb) to some juice or water, up to 4 times a day.

Precautions

Warning: We recommend to seek expert medical advice before taking.

Do not use if you are allergic to any ingredients.

Consult your physician before giving to children under 18, during pregnancy, if nursing or taking medications.

Consult your physician before giving to children under 18, during pregnancy, if nursing or taking medications.

May affect the ability to drive and operate machinery. May have contraindications, can cause side effects and adverse reactions. Do not use if seal is broken or missing.

Keep out of the reach of children!

Storage

Store in a cool dry place.

Formulation

Made in compliance with cGMP 21 CFR 111 in an FDA registered and inspected facility.

Made in USA, Hawaii

C2H5OH alcohol free

Only natural ingredients Identity and purity is laboratory verified

All the raw materials are gluten-free by their nature No artificial colors, flavors, or preservatives

FDA Disclaimer Statement

This product has not been evaluated by the FDA and is not intended to diagnose, treat, cure or prevent any disease.

FDA Statement of Identity

Herbal Supplement

General Statements

Extraction rate: about 1/3-4 (up to 333 mg of dry raw material per 1 ml of extract).

Scan this QR-code to get 15% discount or your next purchase Limited time deal

Seals/Symbols

USA Made in United States of America

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

See for yourself

Wild Lettuce and Passionflower by Hawaii Pharm label

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

Wild Lettuce and Passionflower 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 Wild Lettuce and Passionflower by Hawaii Pharm

These are the 2 active ingredients this product is made of. Select any to open its full monograph.

Serving size0.7 Milliliter(s) Dosage formLiquid Servings per container120 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.

Proprietary Extract Blend

983 mg per serving

Other (inactive) ingredients: Alcohol, Water, Glycerin. These complete the product’s ingredient list but are not active constituents.

Interaction report

Wild Lettuce and Passionflower by Hawaii Pharm Drug Interactions

Want to check YOUR meds against Wild Lettuce and Passionflower?

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
926Drugs
393 Moderate 533 Minor

Ingredients driving the most interactions

Passionflower Herb Extract, Dry 836
Wild Lettuce Herb Extract, Dry 393

Individual Drug Interactions

The ingredients in Wild Lettuce and Passionflower interact with 926 drugs. Click any drug to see the details.

2 of the 2 ingredients in Wild Lettuce and Passionflower interact with drugs. Each result below shows which ingredient is responsible. Passionflower Herb Extract, Dry Wild Lettuce Herb Extract, Dry

Each ingredient & the kinds of drugs it affects

For each ingredient in Wild Lettuce and Passionflower 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.

Passionflower Herb Extract, Dry3 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
Passionflower Herb Extract, Dry full monograph & interactions

Wild Lettuce Herb Extract, Dry2 drug types · 393 drugs

Anticholinergic Drugs

Studies report varying evidence on whether or not wild lettuce contains hyoscyamine, an anticholinergic drug. If it does, it appears to be in very low amounts. Nevertheless, there have been case reports of individuals consuming large amounts of wild lettuce experiencing anticholinergic-related side effects, such as constipation, dry mouth, dizziness, and sweating. Therefore, if you are already taking a drug with anticholinergic effects, you should be cautious about combining it with wild lettuce as the risk of side effects may be increased.

Likelihood Possible Evidence D
Cns Depressants

Theoretically, concomitant use with drugs with sedative effects might cause additive therapeutic effects and adverse effects.

Likelihood Possible Evidence D
Wild Lettuce Herb Extract, Dry full monograph & interactions
The maker

Brand information

Manufacturer and brand details for Wild Lettuce and Passionflower, from the product label.

Hawaii Pharm

See all Hawaii Pharm products
Name
Hawaii Pharm LLC
Street Address
510 Sumner St STE 613
City
Honolulu
State
HI
ZipCode
96817
Phone Number
888-542-9244
Web Address
Hawaiipharm.com
Pharmacist Counseling Corner

Wild Lettuce and Passionflower by Hawaii Pharm: Common Questions

Does Wild Lettuce and Passionflower by Hawaii Pharm interact with any medications?
Yes. Based on its ingredients, Wild Lettuce and Passionflower has a known interaction with 926 medications. Use the checker to see how it interacts with a specific drug.
How can one product interact with so many drugs?
Wild Lettuce and Passionflower contains 2 active ingredients, and an interaction can come from any of them. We check every ingredient, combine the results into one list per medication, and show which ingredient and mechanism is 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 this if I'm on a blood pressure or heart medication?
Some of those drugs are processed through a liver enzyme that passionflower may affect (at Minor severity), so it depends on your specific medication. Use the interaction checker below with your exact drug name, or call us to be sure.
Will this make me drowsy?
Passionflower commonly causes drowsiness, dizziness, and confusion, especially at higher doses. If you're planning to drive or operate machinery, take it at night or after your day is done.
Is it safe during pregnancy or while breastfeeding?
No — the safety data advises against passionflower in pregnancy due to lack of testing and possible effects on the uterus, and there isn't enough information for breastfeeding. Wild lettuce carries the same caution. Talk to your doctor or pharmacist before using this product if you're pregnant or nursing.
What is wild lettuce actually used for?
We don't have effectiveness ratings for wild lettuce in our data, so we can't tell you what it's reliably used for. Your pharmacist can share more about traditional uses if you'd like.
Can I take this with my sleep aid?
No — both passionflower and wild lettuce can add to the effects of sedative medications and cause unsafe levels of drowsiness or impaired thinking. Check with us before combining them.

Written and reviewed by the HelloPharmacist editorial staff. Our editorial policy

Not sure if Wild Lettuce and Passionflower is safe with your meds?

Our pharmacists answer your medication & supplement questions — free.

Ask a pharmacist

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.

Wild Lettuce and Passionflower label
Go deeper

The Full Monographs Behind Wild Lettuce and Passionflower’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 → Herb & supplement monograph

Wild Lettuce

Interacts with 393 drugs

Wild lettuce is a traditional herb used mainly for sleep, anxiety, and pain, but solid human research supporting these uses is very limited. Because its safety is not well studied, it should...

Read the full Wild Lettuce monograph →
Sources

Sources & How We Checked

Wild Lettuce and Passionflower'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 24 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 →

Wild Lettuce 5 references
  1. Newall CA, Anderson LA, Philpson JD. Herbal Medicine: A Guide for Healthcare Professionals. London, UK: The Pharmaceutical Press, 1996.
  2. Gruenwald J, Brendler T, Jaenicke C. PDR for Herbal Medicines. 1st ed. Montvale, NJ: Medical Economics Company, Inc., 1998.
  3. Brinker F. Herb Contraindications and Drug Interactions. 2nd ed. Sandy, OR: Eclectic Medical Publications, 1998.
  4. Besharat S, Besharat M, Jabbari A. Wild lettuce (Lactuca virosa) toxicity. BMJ Case Rep. 2009;2009. pii: bcr06.2008.0134.
  5. Mullins ME, Horowitz BZ. The case of the salad shooters: intravenous injection of wild lettuce extract. Vet Hum Toxicol. 1998;40(5):290-1.

See these in context on the Wild Lettuce 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

Keep exploring
Supplement interaction checker › Check any supplement or product against your medications Drug–drug interactions › Check two or more of your medications against each other Browse medications A–Z › Every drug we've checked against herbs & supplements NDC & pricing lookup › Find a drug’s NDCs, packaging and costs Ask a pharmacist › Free, personal answer from our licensed team