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Dietary supplement

Periwinkle Strawberry Flavor Ingredients & Drug Interactions

by TerraVita

Periwinkle Strawberry Flavor 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 Periwinkle Strawberry Flavor 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

Periwinkle Strawberry Flavor is a dietary supplement by TerraVita with 1 active ingredient. Its ingredients are commonly taken for memory and cognitive support, circulation problems, dizziness and ringing in the ears.Based on those ingredients, 172 medications have a known interaction with it, the most serious rated moderate. The ingredients most likely to interact are Periwinkle Glycerite Liquid Extract. Use the checker below to test your specific medication, or read the full HelloPharmacist Interaction Report.

Jump to a section

Check Your Meds Against Periwinkle Strawberry Flavor by TerraVita

Ask about any prescription or over-the-counter medication and we check it for interactions with Periwinkle Strawberry Flavor by TerraVita — and tell you which ingredient is responsible.

Pharmacist-reviewed data Checks every ingredient Answer in seconds
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HelloPharmacist Scorecard of Periwinkle Strawberry Flavor by TerraVita

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: periwinkle glycerite liquid extract. Periwinkle is a plant whose alkaloid compounds — particularly vincamine — have been studied for circulation and cognitive support, though the evidence we hold shows no established effectiveness ratings for it.

The liquid comes suspended in glycerin and flavored with strawberry.

Does it work?

Couldn't assess
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
Not assessable

This is a single-ingredient Periwinkle product and its label doesn't state a use — see Periwinkle's own graded uses on its monograph.

Why this rating?
  • We looked at the product name, claims, and label statements and couldn't find a stated purpose to grade.

We hold no effectiveness data for periwinkle in our records. Claims about its benefits for circulation, memory, or other uses are not backed by established evidence in the information we have on file.

The evidence, ingredient by ingredient Periwinkle

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.

Periwinkle is considered unsafe for oral use. Its vinca alkaloids can cause serious harm to your liver, kidneys, and nervous system, along with low blood pressure (hypotension), skin flushing, and gastrointestinal complaints.

The safety data advises against use during pregnancy and while breastfeeding due to its potent alkaloids and lack of safety information. Because of these risks, periwinkle should only be used under close professional medical supervision, if at all.

Side effects, ingredient by ingredient Periwinkle

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 — Periwinkle.
  • The most serious interaction on file is rated Moderate.
  • For scale: 172 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.

Do not combine this product with blood pressure medications (antihypertensives) — it may lower your blood pressure too much. Talk with your doctor or pharmacist about your current medications before considering this product, especially given its serious safety profile.

Check your own medication Run your meds through the checker above

The bottom line

Scorecard at a glanceFully disclosed formula with no assessable stated purpose. Moderate medication interactions have been identified, and safety information is well characterized.

This product carries significant safety concerns and serious interaction potential with blood pressure medications. If you're taking any medication for high blood pressure or any other condition, do not use this product without talking it over with your doctor or pharmacist first.

Even without medications, periwinkle's toxicity profile means you'd need professional guidance to use it safely.

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 Dec 13, 2022.

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 Periwinkle Strawberry Flavor, straight from the product label.

Brand TerraVita
Barcode (UPC) 064435172060
Net contents 1 Fluid Ounce(s); 30 mL
Market status On market
Date entered into DSLD Dec 13, 2022
DSLD ID 281498
Product type Botanical
Supplement form Liquid
Dietary claims / uses All Other
Intended target group(s) Adult (18 - 50 Years)
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 Periwinkle Strawberry Flavor by TerraVita, 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:
25 Drop(s)
Maximum serving Sizes:
40 Drop(s)
Servings per container
227
UPC/BARCODE
064435172060
IngredientAmount% DV
Periwinkle Glycerite Liquid Extract0.13 mL--

Other ingredients: Glycerin, Strawberry flavor

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)

Copyright 2006 TerraVita - Distributed by ZooScape LLC, All Rights Reserved.

Formula

Strawberry flavored Glycerite liquid extract (1:5)

Formulation

Alcohol free

Suggested/Recommended/Usage/Directions

Suggested Use: Take 25-40 drops of extract in a small amount of warm water 3-4 times daily. Shake well before using.

Precautions

Keep away from children.

Do not use if safety seal around cap is broken or missing.

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

See for yourself

Periwinkle Strawberry Flavor by TerraVita label

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

Periwinkle Strawberry Flavor 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 Periwinkle Strawberry Flavor by TerraVita

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

Serving size25 Drop(s) Dosage formLiquid Servings per container227 Amounts shown are per serving.

Periwinkle Glycerite Liquid Extract

Interacts with
172 drugs
0.13 mL per serving

Periwinkle (Vinca minor) is a flowering plant whose alkaloids are the source of vinpocetine, a compound marketed for memory and brain circulation. Evi...

Periwinkle Glycerite Liquid Extract monograph & interactions

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

Interaction report

Periwinkle Strawberry Flavor by TerraVita Drug Interactions

Want to check YOUR meds against Periwinkle Strawberry Flavor?

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
172Drugs
172 Moderate

Ingredients driving the most interactions

Periwinkle Glycerite Liquid Extract 172

Individual Drug Interactions

The ingredients in Periwinkle Strawberry Flavor interact with 172 drugs. Click any drug to see the details.

1 of the 1 ingredient in Periwinkle Strawberry Flavor interact with drugs. Each result below shows which ingredient is responsible. Periwinkle Glycerite Liquid Extract

Each ingredient & the kinds of drugs it affects

For each ingredient in Periwinkle Strawberry Flavor 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.

Periwinkle Glycerite Liquid Extract1 drug type · 172 drugs

Antihypertensive Drugs

Theoretically, taking periwinkle may increase the effects of antihypertensive drugs due to the hypotensive activity of vincamine, a constituent of periwinkle.

Likelihood Probable Evidence D
Periwinkle Glycerite Liquid Extract full monograph & interactions
The maker

Brand information

Manufacturer and brand details for Periwinkle Strawberry Flavor, from the product label.

TerraVita

See all TerraVita products
Name
ZooScape LLC
Phone Number
844-449-0444
Web Address
www.ZooScape.com
Pharmacist Counseling Corner

Periwinkle Strawberry Flavor by TerraVita: Common Questions

Does Periwinkle Strawberry Flavor by TerraVita interact with any medications?
Yes. Based on its ingredients, Periwinkle Strawberry Flavor has a known interaction with 172 medications. Use the checker to see how it interacts with a specific drug.
How can one product interact with so many drugs?
Periwinkle Strawberry Flavor contains a single active ingredient, and that one ingredient can interact with many different medications on its own. We check it against each medication and show the mechanism responsible.
Where does this information come from?
The product label data comes from the NIH Dietary Supplement Label Database (DSLD); the interaction data is built on the Natural Medicines database and reviewed by HelloPharmacist pharmacists.
Can I take this while I'm pregnant or breastfeeding?
No — the safety data advises against periwinkle during pregnancy and while breastfeeding. The alkaloids in periwinkle are potent, and there isn't enough safety information to know it's okay during these times. Talk with your doctor or pharmacist about safer options.
What's periwinkle supposed to do?
Periwinkle has been studied for potential effects on circulation and cognition, but we hold no established evidence for these uses. Claims about its benefits aren't backed by the data we have on file.
Why does the label say periwinkle is unsafe?
Periwinkle contains vinca alkaloids — potent compounds that can damage your liver, kidneys, and nervous system, especially at higher doses. It's also been reported to cause low blood pressure, skin flushing, and stomach problems. These risks are why professional medical guidance is essential if you're considering it at all.
What's the difference between a glycerite and a regular extract?
A glycerite is an extract made using glycerin as the solvent instead of alcohol. In this product, the periwinkle is suspended in glycerin and flavored with strawberry. Glycerin may be gentler on the stomach for some people, but it doesn't change the safety or interaction profile of the periwinkle itself.
I take blood pressure medication — can I use this?
No — periwinkle can increase the blood-pressure-lowering effects of these drugs and drop your blood pressure too far. Talk with your doctor or pharmacist before using any periwinkle product if you're on blood pressure medication.

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

Not sure if Periwinkle Strawberry Flavor is safe with your meds?

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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.

Periwinkle Strawberry Flavor label
Go deeper

The Full Monographs Behind Periwinkle Strawberry Flavor’s Ingredients

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

Herb & supplement monograph

Periwinkle

Interacts with 172 drugs

Periwinkle (Vinca minor) is a flowering plant whose alkaloids are the source of vinpocetine, a compound marketed for memory and brain circulation. Evidence in humans is limited and mixed, an...

Read the full Periwinkle monograph →
Sources

Sources & How We Checked

Periwinkle Strawberry Flavor'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 5 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.

Periwinkle 5 references
  1. Blumenthal M, ed. The Complete German Commission E Monographs: Therapeutic Guide to Herbal Medicines. Trans. S. Klein. Boston, MA: American Botanical Council, 1998.
  2. McGuffin M, Hobbs C, Upton R, Goldberg A, eds. American Herbal Products Association's Botanical Safety Handbook. Boca Raton, FL: CRC Press, LLC 1997.
  3. Ellenhorn MJ, et al. Ellenhorn's Medical Toxicology: Diagnoses and Treatment of Human Poisoning. 2nd ed. Baltimore, MD: Williams & Wilkins, 1997.
  4. Gruenwald J, Brendler T, Jaenicke C. PDR for Herbal Medicines. 1st ed. Montvale, NJ: Medical Economics Company, Inc., 1998.
  5. Brinker F. Herb Contraindications and Drug Interactions. 2nd ed. Sandy, OR: Eclectic Medical Publications, 1998.

See these in context on the Periwinkle 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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