Preterm Pregnancy Support Ingredients & Drug Interactions
What is this page for?
First and foremost: checking Preterm Pregnancy Support 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
Preterm Pregnancy Support is a dietary supplement by Mountain Meadow Herbs with 5 active ingredients. Its ingredients are commonly taken for menopausal symptoms, menstrual cramps, hormone balance (popular belief).Based on those ingredients, 896 medications have a known interaction with it, the most serious rated moderate. The ingredients most likely to interact are Passionflower, False Unicorn, Wild Yam. Use the checker below to test your specific medication, or read the full HelloPharmacist Interaction Report.
Check Your Meds Against Preterm Pregnancy Support by Mountain Meadow Herbs
Ask about any prescription or over-the-counter medication and we check it for interactions with Preterm Pregnancy Support by Mountain Meadow Herbs — 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 Preterm Pregnancy Support by Mountain Meadow Herbs
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
Low disclosure
This liquid blend contains 5 active ingredients: Wild Yam, Passionflower, False Unicorn, Black Haw, and Cramp Bark, combined in a proprietary blend. The product also contains glycerin, distilled water, and grain alcohol as inactive ingredients (carriers and preservatives in the liquid form).
Each ingredient has traditional herbal roots, though the evidence for most is thin.
Does it work?
Moderate evidence
The evidence for this product's ingredients is sparse. Passionflower shows possibly effective evidence for insomnia and pre-procedural anxiety, meaning there's some support but it's not conclusive.
Wild Yam is possibly ineffective for menopausal symptoms and has insufficient evidence for infertility, sexual dysfunction, and period pain. For False Unicorn, Black Haw, and Cramp Bark, no effectiveness ratings are on file—the data we hold does not establish evidence one way or the other for the conditions this product targets.
How safe is it?
Well-documented data
Wild Yam and Passionflower are generally well tolerated short-term. With Wild Yam, the most common side effects are fever, headache, stomach upset, and vomiting; anaphylaxis is rare.
Passionflower typically causes confusion, dizziness, and drowsiness—avoid driving or operating machinery if you take it. False Unicorn can cause nausea and vomiting at larger doses; safety data in humans is limited.
Black Haw and Cramp Bark have limited human safety data and no documented adverse effects in our files. Pregnancy is a major concern: the facts advise against Wild Yam and Passionflower during pregnancy due to lack of safety data and possible effects on the uterus; False Unicorn is rated likely unsafe in pregnancy; Black Haw and Cramp Bark should be avoided unless a doctor advises otherwise.
For breastfeeding, there isn't enough information for any ingredient here—talk with your pharmacist or doctor.
Meds to double-check
Moderate interaction found
Check with your pharmacist before taking this product if you use estrogens (including birth control or hormone therapy), sedative medications, antidepressants, other drugs processed via CYP2D6 (like fentanyl or codeine), medications processed via CYP3A4 (like some calcium channel blockers or chemotherapy drugs), or lithium. No interactions are documented for Black Haw or Cramp Bark from our data.
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 blends herbs traditionally used in pregnancy support, but the evidence for most ingredients is weak or absent, and interactions with common medications are significant. If you take estrogen therapy, sedatives, antidepressants, heart rhythm drugs, lithium, or pain medications, check this product against your exact medications first using the tool on this page.
If you're pregnant or nursing, discuss it with your doctor or pharmacist before starting.
Educational only — not medical advice; always confirm with your pharmacist. Our editorial policy · How we use AI
Assessment coverage: 5 of 5 active ingredients matched to our full ingredient reviews (monographs). Based on the product label dated Apr 24, 2025.
This Scorecard evaluates available label information, ingredient evidence, and known medication-safety considerations. It does not independently verify product identity, purity, potency, contamination, or manufacturing quality. How these ratings are computed
General information
Key facts about Preterm Pregnancy Support, straight from the product label.
| Brand | Mountain Meadow Herbs |
|---|---|
| Barcode (UPC) | 813086010708 |
| Net contents | 4 Fluid Ounce(s); 120 Milliliter(s) |
| Market status | On market |
| Date entered into DSLD | Apr 24, 2025 |
| DSLD ID | 327820 |
| Product type | Botanical |
| Supplement form | Liquid |
| Dietary claims / uses | All Other, Structure/Function |
| Intended target group(s) | Vegan, Vegetarian, Pregnant Women, Adult Female (18 - 50 Years), Lactating, Dairy Free |
Everything in this section is reproduced from the manufacturer’s own product label — it’s the label speaking, not HelloPharmacist. We show it so you can see exactly what the maker states; we don’t verify or endorse those statements.
Supplement Facts
The label details for Preterm Pregnancy Support by Mountain Meadow Herbs, sourced from the NIH Dietary Supplement Label Database.
Supplement Facts
| Ingredient | Amount | % DV |
|---|---|---|
| Proprietary Blend | 1.25 mL | -- |
| Wild Yam | 0 NP | -- |
| Passionflower | 0 NP | -- |
| False Unicorn | 0 NP | -- |
| Black Haw | 0 NP | -- |
| Cramp Bark | 0 NP | -- |
Other ingredients: Glycerin, Water, Distilled, Grain Alcohol
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.
FDA Disclaimer Statement
These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure or prevent any disease.
Formulation
Calming & Balancing
GF (Gluten free)
Vegan
Calming and balancing support Support a healthy pregnancy Support on-time delivery
Formula
Expecting & Nursing Moms
FDA Statement of Identity
Herbal Dietary Supplement
General Statements
1 dropperful = approx. 1/8 tsp.
See catalog for dosage information.
Midwife-favorite The MMH Three-Leaf Promise: Our high-standard produce nothing less than pure, safe, and effective herbal products. You will always feel that we care - through our products, our services, and our understanding. We deliver on time.
Seals/Symbols
Vegan Made in Montana USA
Suggested/Recommended/Usage/Directions
Suggested use: Adult females: 1/4 tsp. 1-3 times daily as needed. Shake well.
Precautions
Caution: If you are pregnant, nursing, have a medical condition, or are taking a prescription, consult your health care provider before using this product.
Keep out of reach of children.
Storage
Store in a cool, dry place out of sunlight.
Is this label outdated? Report a formula or label change and our pharmacy team will review it.
Preterm Pregnancy Support by Mountain Meadow Herbs 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 Preterm Pregnancy Support by Mountain Meadow Herbs
These are the 5 active ingredients this product is made of. Select any to open its full monograph.
Serving size0.25 Teaspoon(s) Dosage formLiquid Servings per container96 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 Blend
- › Wild Yam
- › Passionflower
- › False Unicorn
- › Black Haw
- › Cramp Bark
Other (inactive) ingredients: Glycerin, Water, Distilled, Grain Alcohol. These complete the product’s ingredient list but are not active constituents.
Preterm Pregnancy Support by Mountain Meadow Herbs Drug Interactions
HelloPharmacist Interaction Report
Preterm Pregnancy Support by Mountain Meadow Herbs contains several ingredients with documented interactions.
Wild Yam carries a Moderate interaction with estrogens—it may theoretically increase or decrease estrogen effects, so if you're on hormone therapy, this matters. Passionflower poses Moderate risk with sedative drugs (like lorazepam or other sedatives), as it can add to their drowsiness and other effects; it also has Minor interactions with a broad category of drugs processed through the CYP3A4 enzyme pathway and another transport system.
False Unicorn shows Moderate interactions with two major drug-processing systems—CYP2D6 substrates (including antidepressants, heart rhythm drugs, and pain medications) and CYP3A4 substrates—and may also increase lithium levels dangerously, a concern if you take lithium for mood disorders. Black Haw and Cramp Bark have no interactions documented in our data, though human safety information for both is limited.
Altogether, these interactions span 886 individual medications. Use the search tool below to check your exact medications before starting.
Check your own medications below · Editorial policy · How we use AI
Want to check YOUR meds against Preterm Pregnancy Support?
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 Preterm Pregnancy Support interact with 896 drugs. Click any drug to see the details.
3 of the 5 ingredients in Preterm Pregnancy Support interact with drugs. Each result below shows which ingredient is responsible. Passionflower False Unicorn Wild Yam
Ado-trastuzumab EmtansineKadcyla
How Ado-trastuzumab Emtansine interacts with Preterm Pregnancy Support — through 2 ingredients. Tap an ingredient for the detail:
False UnicornCytochrome P450 3a4 (cyp3a4) Substrates Moderate
Interaction Summary
In vitro, false unicorn extract inhibits cytochrome P450 3A4 (CYP3A4) activity.
Read the full False Unicorn + Ado-trastuzumab Emtansine interactionPassionflowerCytochrome P450 3a4 (cyp3a4) Substrates Minor
Interaction Summary
Theoretically, passion flower might decrease the effects of CYP3A4 substrates.
Read the full Passionflower + Ado-trastuzumab Emtansine interactionAbemaciclibVerzenio
How Abemaciclib interacts with Preterm Pregnancy Support — through 2 ingredients. Tap an ingredient for the detail:
False UnicornCytochrome P450 3a4 (cyp3a4) Substrates Moderate
Interaction Summary
In vitro, false unicorn extract inhibits cytochrome P450 3A4 (CYP3A4) activity.
Read the full False Unicorn + Abemaciclib interactionPassionflowerCytochrome P450 3a4 (cyp3a4) Substrates Minor
Interaction Summary
Theoretically, passion flower might decrease the effects of CYP3A4 substrates.
Read the full Passionflower + Abemaciclib interactionAbiraterone
How Abiraterone interacts with Preterm Pregnancy Support — through 2 ingredients. Tap an ingredient for the detail:
False UnicornCytochrome P450 3a4 (cyp3a4) Substrates Moderate
Interaction Summary
In vitro, false unicorn extract inhibits cytochrome P450 3A4 (CYP3A4) activity.
Read the full False Unicorn + Abiraterone interactionPassionflowerCytochrome P450 3a4 (cyp3a4) Substrates Minor
Interaction Summary
Theoretically, passion flower might decrease the effects of CYP3A4 substrates.
Read the full Passionflower + Abiraterone interactionAbiraterone AcetateYonsa, Zytiga
How Abiraterone Acetate interacts with Preterm Pregnancy Support — through 2 ingredients. Tap an ingredient for the detail:
False UnicornCytochrome P450 3a4 (cyp3a4) Substrates Moderate
Interaction Summary
In vitro, false unicorn extract inhibits cytochrome P450 3A4 (CYP3A4) activity.
Read the full False Unicorn + Abiraterone Acetate interactionPassionflowerCytochrome P450 3a4 (cyp3a4) Substrates Minor
Interaction Summary
Theoretically, passion flower might decrease the effects of CYP3A4 substrates.
Read the full Passionflower + Abiraterone Acetate interactionAcalabrutinibCalquence
How Acalabrutinib interacts with Preterm Pregnancy Support — through 2 ingredients. Tap an ingredient for the detail:
False UnicornCytochrome P450 3a4 (cyp3a4) Substrates Moderate
Interaction Summary
In vitro, false unicorn extract inhibits cytochrome P450 3A4 (CYP3A4) activity.
Read the full False Unicorn + Acalabrutinib interactionPassionflowerCytochrome P450 3a4 (cyp3a4) Substrates Minor
Interaction Summary
Theoretically, passion flower might decrease the effects of CYP3A4 substrates.
Read the full Passionflower + Acalabrutinib interactionAcepromazineAtravet
How Acepromazine interacts with Preterm Pregnancy Support — through 1 ingredient. Tap an ingredient for the detail:
PassionflowerCns Depressants Moderate
Interaction Summary
Concomitant use of passion flower with sedative drugs might cause additive effects and side effects.
Read the full Passionflower + Acepromazine interactionAcetaminophen, Aspirin, CaffeineExcedrin, Excedrin Extra Strength, Excedrin Migraine
How Acetaminophen, Aspirin, Caffeine interacts with Preterm Pregnancy Support — through 2 ingredients. Tap an ingredient for the detail:
False UnicornCytochrome P450 3a4 (cyp3a4) Substrates Moderate
Interaction Summary
In vitro, false unicorn extract inhibits cytochrome P450 3A4 (CYP3A4) activity.
Read the full False Unicorn + Acetaminophen, Aspirin, Caffeine interactionPassionflowerCytochrome P450 3a4 (cyp3a4) Substrates Minor
Interaction Summary
Theoretically, passion flower might decrease the effects of CYP3A4 substrates.
Read the full Passionflower + Acetaminophen, Aspirin, Caffeine interactionAcetaminophen, Butalbital, CaffeineEsgic, Esgic Plus, Fiogesic, Fioricet, Repan, Tecnal +1 more
How Acetaminophen, Butalbital, Caffeine interacts with Preterm Pregnancy Support — through 2 ingredients. Tap an ingredient for the detail:
False UnicornCytochrome P450 3a4 (cyp3a4) Substrates Moderate
Interaction Summary
In vitro, false unicorn extract inhibits cytochrome P450 3A4 (CYP3A4) activity.
Read the full False Unicorn + Acetaminophen, Butalbital, Caffeine interactionPassionflowerCytochrome P450 3a4 (cyp3a4) Substrates Minor
Interaction Summary
Theoretically, passion flower might decrease the effects of CYP3A4 substrates.
Read the full Passionflower + Acetaminophen, Butalbital, Caffeine interactionAcetaminophen, Butalbital, Caffeine, CodeineEsgic with Codeine, Fioricet w/ Codeine
How Acetaminophen, Butalbital, Caffeine, Codeine interacts with Preterm Pregnancy Support — through 2 ingredients. Tap an ingredient for the detail:
False UnicornCytochrome P450 3a4 (cyp3a4) Substrates, Cytochrome P450 2d6 (cyp2d6) Substrates Moderate
Interaction Summary
In vitro, false unicorn extract inhibits cytochrome P450 3A4 (CYP3A4) activity.
Read the full False Unicorn + Acetaminophen, Butalbital, Caffeine, Codeine interactionPassionflowerCns Depressants, Cytochrome P450 3a4 (cyp3a4) Substrates Moderate
Interaction Summary
Concomitant use of passion flower with sedative drugs might cause additive effects and side effects.
Read the full Passionflower + Acetaminophen, Butalbital, Caffeine, Codeine interactionAcetaminophen, Butalbital, CodeineBancap w/ Codeine
How Acetaminophen, Butalbital, Codeine interacts with Preterm Pregnancy Support — through 2 ingredients. Tap an ingredient for the detail:
False UnicornCytochrome P450 2d6 (cyp2d6) Substrates Moderate
Interaction Summary
In vitro, false unicorn extract inhibits cytochrome P450 2D6 (CYP2D6) activity.
Read the full False Unicorn + Acetaminophen, Butalbital, Codeine interactionPassionflowerCns Depressants Moderate
Interaction Summary
Concomitant use of passion flower with sedative drugs might cause additive effects and side effects.
Read the full Passionflower + Acetaminophen, Butalbital, Codeine interactionAcetaminophen, Butalbital, Codeine PhosphatePhrenilin #3
How Acetaminophen, Butalbital, Codeine Phosphate interacts with Preterm Pregnancy Support — through 2 ingredients. Tap an ingredient for the detail:
False UnicornCytochrome P450 2d6 (cyp2d6) Substrates Moderate
Interaction Summary
In vitro, false unicorn extract inhibits cytochrome P450 2D6 (CYP2D6) activity.
Read the full False Unicorn + Acetaminophen, Butalbital, Codeine Phosphate interactionPassionflowerCns Depressants Moderate
Interaction Summary
Concomitant use of passion flower with sedative drugs might cause additive effects and side effects.
Read the full Passionflower + Acetaminophen, Butalbital, Codeine Phosphate interactionAcetaminophen, Caffeine, Chlorpheniramine, Hydrocodone, PhenylephrineHycomine Compound
How Acetaminophen, Caffeine, Chlorpheniramine, Hydrocodone, Phenylephrine interacts with Preterm Pregnancy Support — through 2 ingredients. Tap an ingredient for the detail:
PassionflowerCns Depressants, Cytochrome P450 3a4 (cyp3a4) Substrates Moderate
Interaction Summary
Concomitant use of passion flower with sedative drugs might cause additive effects and side effects.
Read the full Passionflower + Acetaminophen, Caffeine, Chlorpheniramine, Hydrocodone, Phenylephrine interactionFalse UnicornCytochrome P450 3a4 (cyp3a4) Substrates, Cytochrome P450 2d6 (cyp2d6) Substrates Moderate
Interaction Summary
In vitro, false unicorn extract inhibits cytochrome P450 3A4 (CYP3A4) activity.
Read the full False Unicorn + 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 Preterm Pregnancy Support — through 2 ingredients. Tap an ingredient for the detail:
False UnicornCytochrome P450 2d6 (cyp2d6) Substrates, Cytochrome P450 3a4 (cyp3a4) Substrates Moderate
Interaction Summary
In vitro, false unicorn extract inhibits cytochrome P450 2D6 (CYP2D6) activity.
Read the full False Unicorn + Acetaminophen, Caffeine, Codeine interactionPassionflowerCytochrome P450 3a4 (cyp3a4) Substrates, Cns Depressants Moderate
Interaction Summary
Theoretically, passion flower might decrease the effects of CYP3A4 substrates.
Read the full Passionflower + Acetaminophen, Caffeine, Codeine interactionAcetaminophen, Caffeine, Codeine, SalicylamideCodalan No.1, Codalan No.2, Codalan No.3
How Acetaminophen, Caffeine, Codeine, Salicylamide interacts with Preterm Pregnancy Support — through 2 ingredients. Tap an ingredient for the detail:
False UnicornCytochrome P450 3a4 (cyp3a4) Substrates, Cytochrome P450 2d6 (cyp2d6) Substrates Moderate
Interaction Summary
In vitro, false unicorn extract inhibits cytochrome P450 3A4 (CYP3A4) activity.
Read the full False Unicorn + Acetaminophen, Caffeine, Codeine, Salicylamide interactionPassionflowerCytochrome P450 3a4 (cyp3a4) Substrates, Cns Depressants Moderate
Interaction Summary
Theoretically, passion flower might decrease the effects of CYP3A4 substrates.
Read the full Passionflower + Acetaminophen, Caffeine, Codeine, Salicylamide interactionAcetaminophen, Caffeine, DihydrocodeineDHC Plus, Panlor DC, Panlor SS
How Acetaminophen, Caffeine, Dihydrocodeine interacts with Preterm Pregnancy Support — through 2 ingredients. Tap an ingredient for the detail:
False UnicornCytochrome P450 2d6 (cyp2d6) Substrates, Cytochrome P450 3a4 (cyp3a4) Substrates Moderate
Interaction Summary
In vitro, false unicorn extract inhibits cytochrome P450 2D6 (CYP2D6) activity.
Read the full False Unicorn + Acetaminophen, Caffeine, Dihydrocodeine interactionPassionflowerCytochrome P450 3a4 (cyp3a4) Substrates, Cns Depressants Moderate
Interaction Summary
Theoretically, passion flower might decrease the effects of CYP3A4 substrates.
Read the full Passionflower + Acetaminophen, Caffeine, Dihydrocodeine interactionAcetaminophen, Caffeine, IsomethepteneMigralam
How Acetaminophen, Caffeine, Isometheptene interacts with Preterm Pregnancy Support — through 2 ingredients. Tap an ingredient for the detail:
False UnicornCytochrome P450 3a4 (cyp3a4) Substrates Moderate
Interaction Summary
In vitro, false unicorn extract inhibits cytochrome P450 3A4 (CYP3A4) activity.
Read the full False Unicorn + Acetaminophen, Caffeine, Isometheptene interactionPassionflowerCytochrome P450 3a4 (cyp3a4) Substrates Minor
Interaction Summary
Theoretically, passion flower might decrease the effects of CYP3A4 substrates.
Read the full Passionflower + Acetaminophen, Caffeine, Isometheptene interactionAcetaminophen, Caffeine, PyrilamineMidol Max Strength Menstrual
How Acetaminophen, Caffeine, Pyrilamine interacts with Preterm Pregnancy Support — through 2 ingredients. Tap an ingredient for the detail:
False UnicornCytochrome P450 3a4 (cyp3a4) Substrates Moderate
Interaction Summary
In vitro, false unicorn extract inhibits cytochrome P450 3A4 (CYP3A4) activity.
Read the full False Unicorn + Acetaminophen, Caffeine, Pyrilamine interactionPassionflowerCytochrome P450 3a4 (cyp3a4) Substrates Minor
Interaction Summary
Theoretically, passion flower might decrease the effects of CYP3A4 substrates.
Read the full Passionflower + Acetaminophen, Caffeine, Pyrilamine interactionAcetaminophen, Chlorpheniramine Maleate, Dextromethorphan HbrVicks Formula 44M Cough, Cold & Flu Relief
How Acetaminophen, Chlorpheniramine Maleate, Dextromethorphan Hbr interacts with Preterm Pregnancy Support — through 2 ingredients. Tap an ingredient for the detail:
False UnicornCytochrome P450 2d6 (cyp2d6) Substrates, Cytochrome P450 3a4 (cyp3a4) Substrates Moderate
Interaction Summary
In vitro, false unicorn extract inhibits cytochrome P450 2D6 (CYP2D6) activity.
Read the full False Unicorn + Acetaminophen, Chlorpheniramine Maleate, Dextromethorphan Hbr interactionPassionflowerCytochrome P450 3a4 (cyp3a4) Substrates Minor
Interaction Summary
Theoretically, passion flower might decrease the effects of CYP3A4 substrates.
Read the full Passionflower + Acetaminophen, Chlorpheniramine Maleate, Dextromethorphan Hbr interactionAcetaminophen, Chlorpheniramine, Codeine, PhenylephrineColrex
How Acetaminophen, Chlorpheniramine, Codeine, Phenylephrine interacts with Preterm Pregnancy Support — through 2 ingredients. Tap an ingredient for the detail:
False UnicornCytochrome P450 3a4 (cyp3a4) Substrates, Cytochrome P450 2d6 (cyp2d6) Substrates Moderate
Interaction Summary
In vitro, false unicorn extract inhibits cytochrome P450 3A4 (CYP3A4) activity.
Read the full False Unicorn + Acetaminophen, Chlorpheniramine, Codeine, Phenylephrine interactionPassionflowerCns Depressants, Cytochrome P450 3a4 (cyp3a4) Substrates Moderate
Interaction Summary
Concomitant use of passion flower with sedative drugs might cause additive effects and side effects.
Read the full Passionflower + Acetaminophen, Chlorpheniramine, Codeine, Phenylephrine interactionAcetaminophen, Chlorpheniramine, DextromethorphanCoricidin II Extra Strength Cold and Flu
How Acetaminophen, Chlorpheniramine, Dextromethorphan interacts with Preterm Pregnancy Support — through 2 ingredients. Tap an ingredient for the detail:
False UnicornCytochrome P450 2d6 (cyp2d6) Substrates, Cytochrome P450 3a4 (cyp3a4) Substrates Moderate
Interaction Summary
In vitro, false unicorn extract inhibits cytochrome P450 2D6 (CYP2D6) activity.
Read the full False Unicorn + Acetaminophen, Chlorpheniramine, Dextromethorphan interactionPassionflowerCytochrome P450 3a4 (cyp3a4) Substrates Minor
Interaction Summary
Theoretically, passion flower might decrease the effects of CYP3A4 substrates.
Read the full Passionflower + Acetaminophen, Chlorpheniramine, Dextromethorphan interactionAcetaminophen, Chlorpheniramine, Dextromethorphan HydrobromideCoricidin HBP Maximum Strength Flu
How Acetaminophen, Chlorpheniramine, Dextromethorphan Hydrobromide interacts with Preterm Pregnancy Support — through 2 ingredients. Tap an ingredient for the detail:
False UnicornCytochrome P450 3a4 (cyp3a4) Substrates, Cytochrome P450 2d6 (cyp2d6) Substrates Moderate
Interaction Summary
In vitro, false unicorn extract inhibits cytochrome P450 3A4 (CYP3A4) activity.
Read the full False Unicorn + Acetaminophen, Chlorpheniramine, Dextromethorphan Hydrobromide interactionPassionflowerCytochrome P450 3a4 (cyp3a4) Substrates Minor
Interaction Summary
Theoretically, passion flower might decrease the effects of CYP3A4 substrates.
Read the full Passionflower + Acetaminophen, Chlorpheniramine, Dextromethorphan Hydrobromide interactionAcetaminophen, Chlorpheniramine, Dextromethorphan, PhenylpropanolamineMulti Symptom Cold Relief
How Acetaminophen, Chlorpheniramine, Dextromethorphan, Phenylpropanolamine interacts with Preterm Pregnancy Support — through 2 ingredients. Tap an ingredient for the detail:
False UnicornCytochrome P450 3a4 (cyp3a4) Substrates, Cytochrome P450 2d6 (cyp2d6) Substrates Moderate
Interaction Summary
In vitro, false unicorn extract inhibits cytochrome P450 3A4 (CYP3A4) activity.
Read the full False Unicorn + Acetaminophen, Chlorpheniramine, Dextromethorphan, Phenylpropanolamine interactionPassionflowerCytochrome P450 3a4 (cyp3a4) Substrates Minor
Interaction Summary
Theoretically, passion flower might decrease the effects of CYP3A4 substrates.
Read the full Passionflower + Acetaminophen, Chlorpheniramine, Dextromethorphan, Phenylpropanolamine interactionAcetaminophen, Chlorpheniramine, Dextromethorphan, PseudoephedrineChildren's Tylenol Cold Plus Cough, Tylenol Cold Ex Strength
How Acetaminophen, Chlorpheniramine, Dextromethorphan, Pseudoephedrine interacts with Preterm Pregnancy Support — through 2 ingredients. Tap an ingredient for the detail:
False UnicornCytochrome P450 2d6 (cyp2d6) Substrates, Cytochrome P450 3a4 (cyp3a4) Substrates Moderate
Interaction Summary
In vitro, false unicorn extract inhibits cytochrome P450 2D6 (CYP2D6) activity.
Read the full False Unicorn + Acetaminophen, Chlorpheniramine, Dextromethorphan, Pseudoephedrine interactionPassionflowerCytochrome P450 3a4 (cyp3a4) Substrates Minor
Interaction Summary
Theoretically, passion flower might decrease the effects of CYP3A4 substrates.
Read the full Passionflower + Acetaminophen, Chlorpheniramine, Dextromethorphan, Pseudoephedrine interactionAcetaminophen, Chlorpheniramine, Guaifenesin, Phenylephrine, SalicylamideRhinogesic GG
How Acetaminophen, Chlorpheniramine, Guaifenesin, Phenylephrine, Salicylamide interacts with Preterm Pregnancy Support — through 2 ingredients. Tap an ingredient for the detail:
False UnicornCytochrome P450 3a4 (cyp3a4) Substrates Moderate
Interaction Summary
In vitro, false unicorn extract inhibits cytochrome P450 3A4 (CYP3A4) activity.
Read the full False Unicorn + Acetaminophen, Chlorpheniramine, Guaifenesin, Phenylephrine, Salicylamide interactionPassionflowerCytochrome P450 3a4 (cyp3a4) Substrates Minor
Interaction Summary
Theoretically, passion flower might decrease the effects of CYP3A4 substrates.
Read the full Passionflower + Acetaminophen, Chlorpheniramine, Guaifenesin, Phenylephrine, Salicylamide interactionAcetaminophen, Chlorpheniramine, PhenylephrineAlka-Seltzer PLUS, Histex SR, Protid
How Acetaminophen, Chlorpheniramine, Phenylephrine interacts with Preterm Pregnancy Support — through 2 ingredients. Tap an ingredient for the detail:
False UnicornCytochrome P450 3a4 (cyp3a4) Substrates Moderate
Interaction Summary
In vitro, false unicorn extract inhibits cytochrome P450 3A4 (CYP3A4) activity.
Read the full False Unicorn + Acetaminophen, Chlorpheniramine, Phenylephrine interactionPassionflowerCytochrome P450 3a4 (cyp3a4) Substrates Minor
Interaction Summary
Theoretically, passion flower might decrease the effects of CYP3A4 substrates.
Read the full Passionflower + Acetaminophen, Chlorpheniramine, Phenylephrine interactionAcetaminophen, Chlorpheniramine, Phenylephrine, SalicylamideRhinogesic, Rhinogesic JR
How Acetaminophen, Chlorpheniramine, Phenylephrine, Salicylamide interacts with Preterm Pregnancy Support — through 2 ingredients. Tap an ingredient for the detail:
False UnicornCytochrome P450 3a4 (cyp3a4) Substrates Moderate
Interaction Summary
In vitro, false unicorn extract inhibits cytochrome P450 3A4 (CYP3A4) activity.
Read the full False Unicorn + Acetaminophen, Chlorpheniramine, Phenylephrine, Salicylamide interactionPassionflowerCytochrome P450 3a4 (cyp3a4) Substrates Minor
Interaction Summary
Theoretically, passion flower might decrease the effects of CYP3A4 substrates.
Read the full Passionflower + Acetaminophen, Chlorpheniramine, Phenylephrine, Salicylamide interactionAcetaminophen, Chlorpheniramine, PhenylpropanolamineAlumadrine, Conex, Sinadrin Max Strength, Sinulin
How Acetaminophen, Chlorpheniramine, Phenylpropanolamine interacts with Preterm Pregnancy Support — through 2 ingredients. Tap an ingredient for the detail:
False UnicornCytochrome P450 3a4 (cyp3a4) Substrates Moderate
Interaction Summary
In vitro, false unicorn extract inhibits cytochrome P450 3A4 (CYP3A4) activity.
Read the full False Unicorn + Acetaminophen, Chlorpheniramine, Phenylpropanolamine interactionPassionflowerCytochrome P450 3a4 (cyp3a4) Substrates Minor
Interaction Summary
Theoretically, passion flower might decrease the effects of CYP3A4 substrates.
Read the full Passionflower + Acetaminophen, Chlorpheniramine, Phenylpropanolamine interactionAcetaminophen, Chlorpheniramine, Phenylpropanolamine, OpiumHista-Derfule
How Acetaminophen, Chlorpheniramine, Phenylpropanolamine, Opium interacts with Preterm Pregnancy Support — through 2 ingredients. Tap an ingredient for the detail:
PassionflowerCytochrome P450 3a4 (cyp3a4) Substrates, Cns Depressants Moderate
Interaction Summary
Theoretically, passion flower might decrease the effects of CYP3A4 substrates.
Read the full Passionflower + Acetaminophen, Chlorpheniramine, Phenylpropanolamine, Opium interactionFalse UnicornCytochrome P450 3a4 (cyp3a4) Substrates Moderate
Interaction Summary
In vitro, false unicorn extract inhibits cytochrome P450 3A4 (CYP3A4) activity.
Read the full False Unicorn + Acetaminophen, Chlorpheniramine, Phenylpropanolamine, Opium interactionAcetaminophen, Chlorpheniramine, Phenylpropanolamine, PhenyltoloxamineNorel Plus
How Acetaminophen, Chlorpheniramine, Phenylpropanolamine, Phenyltoloxamine interacts with Preterm Pregnancy Support — through 2 ingredients. Tap an ingredient for the detail:
False UnicornCytochrome P450 3a4 (cyp3a4) Substrates Moderate
Interaction Summary
In vitro, false unicorn extract inhibits cytochrome P450 3A4 (CYP3A4) activity.
Read the full False Unicorn + Acetaminophen, Chlorpheniramine, Phenylpropanolamine, Phenyltoloxamine interactionPassionflowerCytochrome P450 3a4 (cyp3a4) Substrates Minor
Interaction Summary
Theoretically, passion flower might decrease the effects of CYP3A4 substrates.
Read the full Passionflower + Acetaminophen, Chlorpheniramine, Phenylpropanolamine, Phenyltoloxamine interactionAcetaminophen, Chlorpheniramine, PseudoephedrineAlka-Seltzer PLUS Liquid Gels, Children's Tylenol Cold, Codimal, Comtrex, Extra Strength Tylenol Allergy Sinus, Lorsin +3 more
How Acetaminophen, Chlorpheniramine, Pseudoephedrine interacts with Preterm Pregnancy Support — through 2 ingredients. Tap an ingredient for the detail:
False UnicornCytochrome P450 3a4 (cyp3a4) Substrates Moderate
Interaction Summary
In vitro, false unicorn extract inhibits cytochrome P450 3A4 (CYP3A4) activity.
Read the full False Unicorn + Acetaminophen, Chlorpheniramine, Pseudoephedrine interactionPassionflowerCytochrome P450 3a4 (cyp3a4) Substrates Minor
Interaction Summary
Theoretically, passion flower might decrease the effects of CYP3A4 substrates.
Read the full Passionflower + Acetaminophen, Chlorpheniramine, Pseudoephedrine interactionEach ingredient & the kinds of drugs it affects
For each ingredient in Preterm Pregnancy Support 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
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.
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.
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.
False Unicorn
Cytochrome P450 2D6 (Cyp2D6) Substrates
In vitro, false unicorn extract inhibits cytochrome P450 2D6 (CYP2D6) activity. Theoretically, false unicorn might increase the levels of CYP2D6 substrates. Some of drugs that are CYP2D6 substrates include amitriptyline (Elavil), clozapine (Clozaril), codeine, desipramine (Norpramin), donepezil (Aricept), fentanyl (Duragesic), flecainide (Tambocor), fluoxetine (Prozac), meperidine (Demerol), methadone (Dolophine), metoprolol (Lopressor, Toprol XL), olanzapine (Zyprexa), ondansetron (Zofran), tramadol (Ultram), trazodone (Desyrel), and others.
Cytochrome P450 3A4 (Cyp3A4) Substrates
In vitro, false unicorn extract inhibits cytochrome P450 3A4 (CYP3A4) activity. Theoretically, false unicorn might increase the levels of CYP3A4 substrates. Drugs that might be affected include some calcium channel blockers (diltiazem, nicardipine, verapamil), chemotherapeutic agents (etoposide, paclitaxel, vinblastine, vincristine, vindesine), antifungals (ketoconazole, itraconazole), glucocorticoids, cisapride (Propulsid), alfentanil (Alfenta), fentanyl (Sublimaze), losartan (Cozaar), fluoxetine (Prozac), midazolam (Versed), omeprazole (Prilosec), ondansetron (Zofran), propranolol (Inderal), fexofenadine (Allegra), and numerous others.
Lithium
False unicorn is thought to have diuretic properties. Theoretically, due to these potential diuretic effects, false unicorn might reduce excretion and increase levels of lithium. The dose of lithium might need to be decreased.
Wild Yam
Estrogens
Theoretically, wild yam might increase or decrease the effects of estrogen.
Wild yam root shows estrogenic and anti-estrogenic effects in vitro. Theoretically, wild yam might interfere with hormone therapy.
Brand information
Manufacturer and brand details for Preterm Pregnancy Support, from the product label.
Mountain Meadow Herbs
See all Mountain Meadow Herbs products- Name
- Mountain Meadow Herbs, Inc.
- Street Address
- 1019 Hard Rock Rd
- City
- Somers
- State
- MT
- ZipCode
- 59932
- Phone Number
- 888.528.8615
- Web Address
- www.mmherbs.com
Preterm Pregnancy Support by Mountain Meadow Herbs: Common Questions
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Written and reviewed by the HelloPharmacist editorial staff. Our editorial policy
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Label information is sourced from the NIH Dietary Supplement Label Database and reflects the product version on file; always read your actual product label. This page is for education only and is not a substitute for professional medical advice. Confirm with your pharmacist or doctor before combining supplements and medications.
The Full Monographs Behind Preterm Pregnancy Support’s Ingredients
Every ingredient we hold a full HelloPharmacist monograph for — uses, evidence, safety, and the complete interaction list.
Wild Yam
Interacts with 41 drugsWild yam is a root traditionally used for menopausal symptoms, cramps, and as a so-called 'natural' hormone supplement, but solid human evidence for these uses is lacking. Despite popular cl...
Read the full Wild Yam monograph → Herb & supplement monographPassion Flower
Interacts with 836 drugsPassion 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 monographFalse Unicorn
Interacts with 740 drugsFalse Unicorn is a North American plant whose root has long been used in traditional medicine for women's reproductive and menstrual concerns. There is very little reliable human research to...
Read the full False Unicorn monograph → Herb & supplement monographBlack Haw
Black Haw is a traditional herbal bark long used to ease menstrual cramps and uterine spasms, but modern human studies are very limited. It contains compounds that may relax smooth muscle, b...
Read the full Black Haw monograph → Herb & supplement monographCramp Bark
Cramp Bark is the dried bark of Viburnum opulus, traditionally used to ease muscle and menstrual cramps. Modern, high-quality human studies are very limited, so its effectiveness is not well...
Read the full Cramp Bark monograph →Sources & How We Checked
Preterm Pregnancy Support'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 31 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.
Wild Yam 7 references
- McGuffin M, Hobbs C, Upton R, Goldberg A, eds. American Herbal Products Association's Botanical Safety Handbook. Boca Raton, FL: CRC Press, LLC 1997.
- Eagon PK, Elm MS, Hunter DS, et al. Medicinal herbs: modulation of estrogen action. Era of Hope Mtg, Dept Defense; Breast Cancer Res Prog, Atlanta, GA 2000;Jun 8-11.
- Cheong JL, Bucknall R. Retinal vein thrombosis associated with a herbal phytoestrogen preparation in a susceptible patient. Postgrad Med J 2005;81:266-7.. PubMed
- Rosenberg Zand, R. S., Jenkins, D. J., and Diamandis, E. P. Effects of natural products and nutraceuticals on steroid hormone-regulated gene expression. Clin Chim.Acta 2001;312(1-2):213-219. PubMed
- Araghiniknam M, Chung S, Nelson-White T, and et al. Antioxidant activity of Dioscorea and dehydroepiandrosterone (DHEA) in older humans. Life Sciences 1996;59:L147-L157.
- Zeng M, Zhang L, Li M, et al. Estrogenic effects of the extracts from the Chinese Yam (Dioscorea opposite Thunb.) and its effective compounds in vitro and in vivo. Molecules. 2018 Jan 23;23(2). Pii: E11. PubMed
- Lu J, Wong RN, Zhang L, et al. Comparative analysis of proteins with stimulating activity on ovarian estradiol biosynthesis from four different Dioscorea species in vitro using both phenotypic and target-based approaches: implication for treating menopaus
Passion Flower 19 references
- Newall CA, Anderson LA, Philpson JD. Herbal Medicine: A Guide for Healthcare Professionals. London, UK: The Pharmaceutical Press, 1996.
- The Review of Natural Products by Facts and Comparisons. St. Louis, MO: Wolters Kluwer Co., 1999.
- Fisher AA, Purcell P, Le Couteur DG. Toxicity of Passiflora incarnata L. J Toxicol Clin Toxicol 2000;38:63-6.
- 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
- 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
- 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.
- Miyasaka LS, Atallah AN, Soares BG. Passiflora for anxiety disorder. Cochrane Database Syst Rev 2007;(1):CD004518. DOI
- Speroni E., Minghetti A. Neuropharmacological activity of extracts from Passiflora incarnata. Planta Med. 1988;54:488-91.
- 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
- 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.
- 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.
- 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
- 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
- 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
- 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
- Ozturk Z, Kalayci CC. Pregnancy outcomes in psychiatric patients treated with passiflora incarnata. Complement Ther Med. 2018 Feb;36:30-32. PubMed
- 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
- 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
- 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
False Unicorn 4 references
- Newall CA, Anderson LA, Philpson JD. Herbal Medicine: A Guide for Healthcare Professionals. London, UK: The Pharmaceutical Press, 1996.
- McGuffin M, Hobbs C, Upton R, Goldberg A, eds. American Herbal Products Association's Botanical Safety Handbook. Boca Raton, FL: CRC Press, LLC 1997.
- Gruenwald J, Brendler T, Jaenicke C. PDR for Herbal Medicines. 1st ed. Montvale, NJ: Medical Economics Company, Inc., 1998.
- Ho SH, Singh M, Holloway AC, Crankshaw DJ. The effects of commercial preparations of herbal supplements commonly used by women on the biotransformation of fluorogenic substrates by human cytochromes P450. Phytother Res. 2011;25(7):983-9. PubMed
Black Haw 1 reference
- Leung AY, Foster S. Encyclopedia of Common Natural Ingredients Used in Food, Drugs and Cosmetics. 2nd ed. New York, NY: John Wiley & Sons, 1996.
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