Interactions on record — worth a quick check against your medications. Based on 2 of 3 ingredients. Check your meds →
Dietary supplement

Europen Elderberry + PureWay-C + Zinc Ingredients & Drug Interactions

by Emerald Labs

Europen Elderberry + PureWay-C + Zinc label
See full label image
Capsule Category: Botanical With Nutrients
Most serious interaction: Moderate
Clinical methodology reviewed by · Updated Sep 9, 2026 · Label data from the NIH DSLD
What is this page for?

First and foremost: checking Europen Elderberry + PureWay-C + Zinc 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

Europen Elderberry + PureWay-C + Zinc is a dietary supplement by Emerald Labs with 3 active ingredients. Its ingredients are commonly taken for zinc deficiency, immune support, cold symptoms.Based on those ingredients, 270 medications have a known interaction with it, the most serious rated moderate. The ingredients most likely to interact are PureWay-C, Zinc. Use the checker below to test your specific medication, or read the full HelloPharmacist Interaction Report.

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Check Your Meds Against Europen Elderberry + PureWay-C + Zinc by Emerald Labs

Ask about any prescription or over-the-counter medication and we check it for interactions with Europen Elderberry + PureWay-C + Zinc by Emerald Labs — and tell you which ingredient is responsible.

Pharmacist-reviewed data Checks every ingredient Answer in seconds
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HelloPharmacist Scorecard of Europen Elderberry + PureWay-C + Zinc by Emerald 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 Jul 23, 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 3 of its 3 active ingredients.
  • No proprietary blends here — you can verify the dose of every single component.

This supplement contains 3 active ingredients. Zinc supports immune function, wound healing, and protein synthesis—it's effective for zinc deficiency and likely effective for Wilson disease (a rare copper-storage disorder).

Vitamin C (supplied as PureWay-C, a bioavailable form) is an antioxidant involved in collagen formation and immune support, and it's effective for vitamin C deficiency. European Elderberry Extract rounds out the formula as a traditional immune-support ingredient, though we hold no interaction data for it.

The capsule itself is the only inactive ingredient.

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: immune support with vitamin C and zinc.
  • We looked for evidence on: Acne, Acute bronchitis, Allergic rhinitis (hay fever), Atopic dermatitis (eczema), Atopic disease, Bleeding — and 4 related terms.
  • The strongest evidence on file: Zinc is rated "Possibly Effective" for Acne (Natural Medicines).
  • Also on file: Vitamin C is rated "Possibly Ineffective" for Acute bronchitis, Cardiovascular disease (CVD).
  • Also on file: Zinc is rated "Insufficient Reliable Evidence To Rate" for Burns, Atopic dermatitis (eczema), Bronchiolitis, Canker sores.

Zinc is effective for treating zinc deficiency and likely effective for Wilson disease. It's rated possibly effective for acne, a rare inherited skin condition called acrodermatitis enteropathica, age-related macular degeneration, and diabetes—meaning some evidence exists but it's not conclusive.

Vitamin C is effective for vitamin C deficiency and possibly effective for anemia of chronic disease, atrial fibrillation, cataracts, and exercise-induced respiratory infections. The effectiveness of European Elderberry Extract is not established in the data we hold.

The evidence, ingredient by ingredient Zinc Vitamin C

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.

Zinc is generally well tolerated at recommended doses but can cause nausea, diarrhea, abdominal cramps, and a metallic taste—usually dose-related. The safe upper limit for adults is 40 mg daily; high doses above that may raise the risk of copper deficiency over time.

In pregnancy, zinc is rated likely safe; in breastfeeding, it's also rated likely safe. Vitamin C is generally safe at normal doses but can cause nausea, heartburn, diarrhea, and headache—especially above 2 grams daily.

Very high doses may increase kidney stone risk in susceptible people. Vitamin C is rated likely safe in pregnancy and lactation overall, though high-dose supplements in pregnancy are possibly unsafe.

Safety data for European Elderberry Extract in pregnancy and lactation is not on file.

Side effects, ingredient by ingredient Zinc Vitamin C

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 — Zinc, Vitamin C.
  • The most serious interaction on file is rated Moderate.
  • Some involve high-stakes drug classes: anticoagulant / antiplatelet drugs; cancer treatments.
  • For scale: 270 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 before combining this product if you take quinolone antibiotics (like ciprofloxacin), tetracycline antibiotics (like doxycycline), cephalexin, estrogens (birth control or hormone therapy), warfarin (a blood thinner), levothyroxine (thyroid medication), penicillamine (a chelation drug), ritonavir (an HIV medication), integrase inhibitors (HIV drugs), or certain chemotherapy agents. All of these have documented moderate-severity interactions with zinc or vitamin C.

Separate antibiotics from this supplement by 2–6 hours as directed.

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.

This combination may appeal to you if you're looking for immune support and have a documented zinc or vitamin C deficiency. Be cautious if you take antibiotics (especially quinolones, tetracyclines, or cephalosporins), blood thinners, thyroid medication, birth control, or HIV drugs—all warrant a conversation with your doctor or pharmacist before adding this supplement.

Keep doses reasonable and talk with your own healthcare provider about whether it fits your health profile.

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

Assessment coverage: 2 of 3 active ingredients matched to our full ingredient reviews (monographs). Based on the product label dated Feb 22, 2024.

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 Europen Elderberry + PureWay-C + Zinc, straight from the product label.

Brand Emerald Labs
Barcode (UPC) 743650003600
Net contents 60 Vegetable Cap(s)
Market status On market
Date entered into DSLD Feb 22, 2024
DSLD ID 302599
Product type Botanical With Nutrients
Supplement form Capsule
Dietary claims / uses Nutrient, All Other, Structure/Function
Intended target group(s) Vegan, Vegetarian, Adult (18 - 50 Years), Gluten Free, Dairy 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 Europen Elderberry + PureWay-C + Zinc by Emerald 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:
2 Capsule(s)
Maximum serving Sizes:
4 Capsule(s)
Servings per container
30
UPC/BARCODE
743650003600
IngredientAmount% DV
Zinc10 mg91%
PureWay-C300 mg333%
European Elderberry Extract500 mg--

Other ingredients: Capsule

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.
Formula

Therapeutic amounts of superior European Elderberry (10:1), 100% Pure, “Gold Standard” Albion Zinc as glycinate Chelate, and Non-GMO Project Verified PureWay-C (12-Hour Retention) for maximum bioavailability.

European elderberry +PureWay-C +Zinc

Albion

General Statements

Emerald Labs is family owned and operated since our beginnings in 1996.

Doctor-formulated

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.

Brand IP Statement(s)

Emerald Labs The additive-free company

Copyright 2020 Emerald Labs, Inc.

Albion and TRAACS are registered trademarks of Albion Laboratories, Inc. U.S. Patent7,838,042 is licensed by Albion Laboratories, Inc. PureWay-C is a registered trademark of Innovation laboratories, Inc.

Formulation

Enhanced liposomal absorption European & gold-standard

Clinical potency

Made with Non-GMO ingredients NO magnesium stearate Gluten-free

Vegan formula

This product is free of: Milk, Salt, Yeast, Soy, Wheat and Artificial Flavors.

We are committed to providing your family with additive-free formulas and superior nutrient forms in therapeutic amounts.

FDA Statement of Identity

Dietary Supplement

Dietary Supplement

Suggested/Recommended/Usage/Directions

Suggested Use: Adults, take two to four (2-4) capsules daily, split throughout the day, or as directed by a Health Care Practitioner.

Precautions

Keep Out of Reach of Children.

Do not use if safety seal on cap or printed inner seal is missing or broken.

Consult a physician if pregnant, lactating, currently on prescription medication or diagnosed with a medical condition.

Product is manufactured in a facility that processes milk, egg, soy, tree nuts, fish and shellfish.

Storage

Store in a Cool, Dry Place.

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

See for yourself

Europen Elderberry + PureWay-C + Zinc by Emerald Labs label

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

Europen Elderberry + PureWay-C + Zinc 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 Europen Elderberry + PureWay-C + Zinc by Emerald Labs

These are the 3 active ingredients this product is made of. Select any to open its full monograph.

Serving size2 Capsule(s) Dosage formCapsule Servings per container30 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.

Zinc

Interacts with
67 drugs
10 mg per serving Form: Albion Zinc Bisglycinate Chelate

Zinc is an essential mineral that your body needs for immune function, wound healing, taste, and smell. Most people get enough from food, but suppleme...

Zinc monograph & interactions

PureWay-C

Interacts with
207 drugs
300 mg per serving Form: Vitamin C

Vitamin C (ascorbic acid) is an essential nutrient your body needs but cannot make, so you must get it from food or supplements. It's important for im...

PureWay-C monograph & interactions

European Elderberry Extract

500 mg per serving

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

Interaction report

Europen Elderberry + PureWay-C + Zinc by Emerald Labs Drug Interactions

Want to check YOUR meds against Europen Elderberry + PureWay-C + Zinc?

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
270Drugs
160 Moderate 110 Minor

Ingredients driving the most interactions

PureWay-C 207
Zinc 67

Individual Drug Interactions

The ingredients in Europen Elderberry + PureWay-C + Zinc interact with 270 drugs. Click any drug to see the details.

2 of the 3 ingredients in Europen Elderberry + PureWay-C + Zinc interact with drugs. Each result below shows which ingredient is responsible. PureWay-C Zinc

Each ingredient & the kinds of drugs it affects

For each ingredient in Europen Elderberry + PureWay-C + Zinc 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.

PureWay-C13 drug types · 207 drugs

Alkylating Agents

Theoretically, antioxidant effects of vitamin C might reduce the effectiveness of alkylating agents.
The use of antioxidants like vitamin C during chemotherapy is controversial. There is concern that antioxidants could reduce the activity of chemotherapy drugs that generate free radicals, such as cyclophosphamide, chlorambucil, carmustine, busulfan, and thiotepa. In contrast, some researchers theorize that antioxidants might make chemotherapy more effective by reducing oxidative stress that could interfere with apoptosis (cell death) of cancer cells. More evidence is needed to determine what effect, if any, antioxidants such as vitamin C have on chemotherapy.

Likelihood Possible Evidence D
Aluminum

Vitamin C can increase the amount of aluminum absorbed from aluminum compounds.
Research in animals and humans shows that vitamin C increases aluminum absorption, theoretically by chelating aluminum and keeping it in solution where it is available for absorption. In people with normal renal function, urinary excretion of aluminum will likely increase, making aluminum retention and toxicity unlikely. Patients with renal failure who take aluminum-containing compounds such as phosphate binders should avoid vitamin C supplements in doses above the recommended dietary allowances.

Likelihood Probable Evidence B
Antitumor Antibiotics

Theoretically, the antioxidant effects of vitamin C might reduce the effectiveness of antitumor antibiotics.
The use of antioxidants like vitamin C during chemotherapy is controversial. There is concern that antioxidants could reduce the activity of chemotherapy drugs which generate free radicals, such as doxorubicin. In contrast, some researchers theorize that antioxidants might make chemotherapy more effective by reducing oxidative stress that could interfere with apoptosis (cell death) of cancer cells. More evidence is needed to determine what effects, if any, antioxidants such as vitamin C have on chemotherapy.

Likelihood Possible Evidence D
Estrogens

Vitamin C might increase blood levels of estrogens.
Increases in plasma estrogen levels of up to 55% occur under some circumstances when vitamin C is taken concurrently with oral contraceptives or hormone replacement therapy, including topical products. It is suggested that vitamin C prevents oxidation of estrogen in the tissues, regenerates oxidized estrogen, and reduces sulfate conjugation of estrogen in the gut wall. When tissue levels of vitamin C are high, these processes are already maximized and supplemental vitamin C does not have any effect on estrogen levels. Increases in plasma estrogen levels may occur when patients who are deficient in vitamin C take supplements. Monitor these patients for estrogen-related side effects.

Likelihood Probable Evidence B
Fluphenazine (Prolixin)

Theoretically, vitamin C might decrease levels of fluphenazine.
In one patient there was a clinically significant decrease in fluphenazine levels when vitamin C (500 mg twice daily) was started. The mechanism is not known, and there is no further data to confirm this interaction.

Likelihood Possible Evidence D
Indinavir (Crixivan)

Vitamin C can modestly reduce indinavir levels.
One pharmacokinetic study shows that taking vitamin C 1 gram orally once daily along with indinavir 800 mg orally three times daily reduces the area under the concentration-time curve of indinavir by 14%. The mechanism of this interaction is unknown, but it is unlikely to be clinically significant in most patients. The effect of higher doses of vitamin C on indinavir levels is unknown.

Likelihood Probable Evidence B
Levothyroxine (Synthroid, Others)

Vitamin C can increase levothyroxine absorption.
Two clinical studies in adults with poorly controlled hypothyroidism show that swallowing levothyroxine with a glass of water containing vitamin C 500-1000 mg in solution reduces thyroid stimulating hormone (TSH) levels and increases thyroxine (T4) levels when compared with taking levothyroxine alone. This suggests that vitamin C increases the oral absorption of levothyroxine, possibly due to a reduction in pH.

Likelihood Probable Evidence B
Warfarin (Coumadin)

High-dose vitamin C might reduce the levels and effectiveness of warfarin.
Vitamin C in high doses may cause diarrhea and possibly reduce warfarin absorption. There are reports of two people who took up to 16 grams daily of vitamin C and had a reduction in prothrombin time. Lower doses of 5-10 grams daily can also reduce warfarin absorption. In many cases, this does not seem to be clinically significant. However, a case of warfarin resistance has been reported for a patient who took vitamin C 500 mg twice daily. Cessation of vitamin C supplementation resulted in a rapid increase in international normalized ratio (INR). Tell patients taking warfarin to avoid taking vitamin C in excessively high doses (greater than 10 grams daily). Lower doses may be safe, but the anticoagulation activity of warfarin should be monitored. Patients who are stabilized on warfarin while taking vitamin C should avoid adjusting vitamin C dosage to prevent the possibility of warfarin resistance.

Likelihood Possible Evidence D
Acetaminophen (Tylenol, Others)

High-dose vitamin C might slightly prolong the clearance of acetaminophen.
A small pharmacokinetic study in healthy volunteers shows that taking high-dose vitamin C (3 grams) 1.5 hours after taking acetaminophen 1 gram slightly increases the apparent half-life of acetaminophen from around 2.3 hours to 3.1 hours. Ascorbic acid competitively inhibits sulfate conjugation of acetaminophen. However, to compensate, elimination of acetaminophen glucuronide and unconjugated acetaminophen increases. This effect is not likely to be clinically significant.

Likelihood Probable Evidence B
Aspirin

Acidification of the urine by vitamin C might increase aspirin levels.
It has been suggested that acidification of the urine by vitamin C could increase reabsorption of salicylates by the renal tubules, and increase plasma salicylate levels. However, short-term use of up to 6 grams daily of vitamin C does not seem to affect urinary pH or salicylate excretion, suggesting this interaction is not clinically significant.

Likelihood Possible Evidence B
Choline Magnesium Trisalicylate (Trilisate)

Acidification of the urine by vitamin C might increase choline magnesium trisalicylate levels.
It has been suggested that acidification of the urine by vitamin C could increase reabsorption of salicylates by the renal tubules, and increase plasma salicylate levels. However, short-term use of up to 6 grams daily of vitamin C does not seem to affect urinary pH or salicylate excretion, suggesting this interaction probably is not clinically significant.

Likelihood Possible Evidence B
Niacin

Vitamin C might decrease the beneficial effects of niacin on high-density lipoprotein (HDL) cholesterol levels.
A combination of niacin and simvastatin (Zocor) effectively raises HDL cholesterol levels in patients with coronary disease and low HDL levels. Clinical research shows that taking a combination of antioxidants (vitamin C, vitamin E, beta-carotene, and selenium) along with niacin and simvastatin (Zocor) attenuates this rise in HDL, specifically the HDL-2 and apolipoprotein A1 fractions, by more than 50% in patients with coronary disease. It is not known whether this adverse effect is due to a single antioxidant such as vitamin C, or to the combination. It also is not known whether it will occur in other patient populations.

Likelihood Possible Evidence A
Salsalate (Disalcid)

Acidification of the urine by vitamin C might increase salsalate levels.
It has been suggested that acidification of the urine by vitamin C could increase reabsorption of salicylates by the renal tubules, and increase plasma salicylate levels. However, short-term use of up to 6 grams/day vitamin C does not seem to affect urinary pH or salicylate excretion, suggesting this interaction probably is not clinically significant.

Likelihood Possible Evidence B
PureWay-C full monograph & interactions

Zinc10 drug types · 67 drugs

Bictegravir/Emtricitabine/Tenofovir Alafenamide (Biktarvy)

Theoretically, zinc might decrease levels of bictegravir/emtricitabine/tenofovir alafenamide by reducing its absorption.
Advise patients that bictegravir/emtricitabine/tenofovir alafenamide should be taken at least 2 hours before or 6 hours after zinc containing products.

Likelihood Probable Evidence D
Cephalexin (Keflex)

Zinc might decrease cephalexin levels by chelating with cephalexin in the gut and preventing its absorption.
A pharmacokinetic study shows that zinc sulfate 250 mg taken concomitantly with cephalexin 500 mg decreases peak levels of cephalexin by 31% and reduces the exposure to cephalexin by 27%. Also, taking zinc sulfate 3 hours before cephalexin decreases peak levels of cephalexin by 11% and reduces the exposure to cephalexin by 18%. By decreasing cephalexin levels, zinc might increase the risk of treatment failure. This effect does not occur when zinc is taken 3 hours after the cephalexin dose. To avoid an interaction, advise patients take zinc sulfate 3 hours after taking cephalexin.

Likelihood Probable Evidence B
Cisplatin (Platinol-Aq)

Theoretically, zinc might interfere with the therapeutic effects of cisplatin.
Animal research suggests that zinc stimulates tumor cell production of the protein metallothionein, which binds and inactivates cisplatin. It is not known whether zinc supplements or high dietary zinc intake can cause clinically significant interference with cisplatin therapy. Cisplatin might also increase zinc excretion.

Likelihood Possible Evidence D
Integrase Inhibitors

Theoretically, taking zinc along with integrase inhibitors might decrease the levels and clinical effects of these drugs.
Zinc is a divalent cation. Pharmacokinetic studies have shown that other divalent cations such as calcium and iron can decrease blood levels of the integrase inhibitor dolutegravir through chelation.

Likelihood Possible Evidence D
Penicillamine (Cuprimine, Depen)

Zinc might reduce the levels and clinical effects of penicillamine.
By forming an insoluble complex with penicillamine, zinc interferes with penicillamine absorption and activity. Zinc supplements reduce the efficacy of low-dose penicillamine (0.5-1 gram/day), but do not seem to affect higher doses (1-2.75 gram/day), provided dosing times are separated. Advise patients to take zinc and penicillamine at least 2 hours apart.

Likelihood Probable Evidence B
Quinolone Antibiotics

Zinc can decrease the levels and clinical effects of quinolones antibiotics.
Quinolones form complexes with zinc in the gastrointestinal tract, reducing absorption of both the quinolone and zinc if taken at the same time. Advise patients to take these drugs at least 2 hours before, or 4-6 hours after, zinc supplements.

Likelihood Probable Evidence B
Ritonavir (Norvir)

Zinc modestly reduces levels of ritonavir.
Clinical research shows that zinc might reduce serum ritonavir levels by chelating with ritonavir in the gut and preventing its absorption. In patients with HIV, ritonavir is taken with atazanavir to prevent the metabolism and increase the effects of atazanavir. A pharmacokinetic study shows that, in patients being treated with atazanavir/ritonavir, co-administration of zinc sulfate (Solvazinc tablets) 125 mg as a single dose or as multiple daily doses for 2 weeks reduces plasma levels of ritonavir by about 16%. However, atazanavir levels still remains high enough to prevent HIV virus replication. Therefore, the decrease in ritonavir levels is not likely to be clinically significant.

Likelihood Probable Evidence B
Tetracycline Antibiotics

Zinc might reduce levels of tetracycline antibiotics.
Tetracyclines form complexes with zinc in the gastrointestinal tract, which can reduce absorption of both the tetracycline and zinc when taken at the same time. Taking zinc sulfate 200 mg with tetracycline reduces absorption of the antibiotic by 30% to 40%. Demeclocycline and minocycline cause a similar interaction. However, doxycycline does not seem to interact significantly with zinc. Advise patients to take tetracyclines at least 2 hours before, or 4-6 hours after, zinc supplements to avoid any interactions.

Likelihood Probable Evidence B
Amiloride (Midamor)

Amiloride can modestly reduce zinc excretion and increase zinc levels.
Clinical research shows that amiloride can reduce urinary zinc excretion, especially at doses of 10 mg per day or more. This zinc-sparing effect can help to counteract zinc losses caused by thiazide diuretics, but it is unlikely to cause zinc toxicity at usual amiloride doses. The other potassium-sparing diuretics, spironolactone (Aldactone) and triamterene (Dyrenium), do not seem to have a zinc-sparing effect.

Likelihood Probable Evidence B
Atazanavir (Reyataz)

Zinc modestly reduces levels of atazanavir, although this effect does not seem to be clinically significant.
Clinical research shows that zinc might decrease serum atazanavir levels by chelating with atazanavir in the gut and preventing its absorption. Although a single dose of zinc sulfate (Solvazinc tablets) 125 mg orally does not affect atazanavir concentrations in patients being treated with atazanavir/ritonavir, co-administration of zinc sulfate 125 mg daily for 2 weeks reduces plasma levels of atazanavir by about 22% in these patients. However, despite this decrease, atazanavir levels still remain at high enough concentrations for the prevention of HIV virus replication.

Likelihood Probable Evidence B
Zinc full monograph & interactions
The maker

Brand information

Manufacturer and brand details for Europen Elderberry + PureWay-C + Zinc, from the product label.

Emerald Labs

See all Emerald Labs products
Name
Emerald Labs
City
Carson
State
CA
Phone Number
800-436-4366
Web Address
www.emeraldlabs.com
Pharmacist Counseling Corner

Europen Elderberry + PureWay-C + Zinc by Emerald Labs: Common Questions

Does Europen Elderberry + PureWay-C + Zinc by Emerald Labs interact with any medications?
Yes. Based on its ingredients, Europen Elderberry + PureWay-C + Zinc has a known interaction with 270 medications. Use the checker to see how it interacts with a specific drug.
How can one product interact with so many drugs?
Europen Elderberry + PureWay-C + Zinc contains 3 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 while I'm pregnant or breastfeeding?
Zinc and vitamin C are both rated likely safe in pregnancy and breastfeeding at normal amounts. However, vitamin C in high doses during pregnancy is rated possibly unsafe. Talk with your doctor or pharmacist before starting any supplement during pregnancy or while nursing to make sure the dose and timing fit your individual situation.
What's PureWay-C?
PureWay-C is a form of vitamin C designed for better absorption in your body. It works the same way as regular vitamin C—supporting your immune system and acting as an antioxidant—but your body may use it more efficiently.
Will this cause any stomach upset?
Both zinc and vitamin C can cause nausea, diarrhea, heartburn, and abdominal cramps, particularly at higher doses or on an empty stomach. Starting with food and staying within the recommended dose (zinc capped at 40 mg daily for adults, vitamin C at 2 grams daily) helps minimize these effects.
Is this safe to take long-term?
Zinc is generally well tolerated long-term at recommended doses, but very high doses over time may increase copper deficiency risk. Vitamin C is similarly safe at normal amounts. For long-term use above standard doses, check with your doctor or pharmacist.
Can I take this if I'm on antibiotics?
It depends on your antibiotic. Zinc can interfere with quinolones, tetracyclines, and cephalexin absorption, reducing how well they work. If you're on any of these, take them at least 2–6 hours apart from this supplement. Talk with your pharmacist about your specific antibiotic before starting.
What is European Elderberry used for?
Elderberry is traditionally used for immune support, but we don't hold effectiveness data for it in our records. It's included in this formulation as a complementary ingredient to the zinc and vitamin C.

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.

Europen Elderberry + PureWay-C + Zinc label
Go deeper

The Full Monographs Behind Europen Elderberry + PureWay-C + Zinc’s Ingredients

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

Herb & supplement monograph

Zinc

Interacts with 67 drugs

Zinc is an essential mineral that your body needs for immune function, wound healing, taste, and smell. Most people get enough from food, but supplements can help correct or prevent a defici...

Read the full Zinc monograph → Herb & supplement monograph

Vitamin C

Interacts with 207 drugs

Vitamin C (ascorbic acid) is an essential nutrient your body needs but cannot make, so you must get it from food or supplements. It's important for immune function, collagen, and acts as an...

Read the full Vitamin C monograph →
Sources

Sources & How We Checked

Europen Elderberry + PureWay-C + Zinc'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 139 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.

Zinc 88 references
  1. Barceloux DG. Zinc. J Toxicol Clin Toxicol 1999;37:279-92.
  2. Eby GA, Davis DR, Halcomb WW. Reduction in duration of common colds by zinc gluconate lozenges in a double-blind study. Antimicrob Agents Chemother 1984;25:20-4. DOI
  3. Smith DS, Helzner EC, Nuttall CE Jr, et al. Failure of zinc gluconate in treatment of acute upper respiratory tract infections. Antimicrob Agents Chemother 1989;33:646-8. PubMed
  4. Blondeau JM. Expanded activity and utility of the new fluoroquinolones: a review. Clin Ther 1999;21:3-40. PubMed
  5. Reyes AJ, Olhaberry JV, Leary WP, et al. Urinary zinc excretion, diuretics, zinc deficiency and some side-effects of diuretics. S Afr Med J 1983;64:936-41.
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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.

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