Gammadyn Zn-Ni-Co Ingredients & Drug Interactions
What is this page for?
First and foremost: checking Gammadyn Zn-Ni-Co 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
Gammadyn Zn-Ni-Co is a dietary supplement by UNDA Gammadyn with 3 active ingredients. Its ingredients are commonly taken for zinc deficiency, immune support, cold symptoms.Based on those ingredients, 68 medications have a known interaction with it, the most serious rated moderate. The ingredients most likely to interact are Zinc, Nickel. Use the checker below to test your specific medication, or read the full HelloPharmacist Interaction Report.
Check Your Meds Against Gammadyn Zn-Ni-Co by UNDA Gammadyn
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HelloPharmacist Scorecard of Gammadyn Zn-Ni-Co by UNDA Gammadyn
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
Full disclosure
UNDA Gammadyn Zn-Ni-Co is a liquid formula with 3 active mineral ingredients: zinc, nickel, and cobalt. Zinc is essential for immune function, wound healing, and protein synthesis.
Nickel and cobalt are trace minerals your body needs in small amounts — cobalt is part of vitamin B12, which supports nerve and blood cell health, though the cobalt in this supplement is inorganic cobalt rather than the B12 form. The product also contains water and glucose as inactive ingredients to deliver the minerals.
Does it work?
Strong evidence
Zinc in this product is effective for zinc deficiency and likely effective for Wilson disease (a genetic copper-storage disorder). It's possibly effective for acne, acrodermatitis enteropathica (a rare genetic condition), age-related macular degeneration, and diabetes.
For nickel, the data shows it's likely effective for nickel deficiency — a real but uncommon situation. Nickel's effectiveness for iron deficiency anemia and osteoporosis has insufficient evidence to rate.
Cobalt's effectiveness is not established in the data we hold.
How safe is it?
Well-documented data
Zinc is generally well tolerated at recommended doses. The most common side effects are abdominal cramps, diarrhea, metallic taste, nausea, and vomiting — all dose-related.
Stay below the safe upper limit of 40 mg daily for adults unless your doctor advises otherwise. Long-term high doses can raise your risk of copper deficiency, which may cause anemia and low white blood cells.
Cobalt is a concern: inorganic cobalt supplements (like those in this product) have no proven benefit and can cause serious harm with long-term or high-dose use, including heart muscle damage, hearing loss, and vision loss. Cobalt is not recommended in pregnancy or while breastfeeding.
Nickel is a common allergen and can cause contact dermatitis; safety in pregnancy and breastfeeding isn't established, so supplements aren't recommended in those states. High oral doses of nickel may increase lung, nose, larynx, and prostate cancer risk.
Meds to double-check
Moderate interaction found
Check with your doctor or pharmacist before using this product if you take quinolone antibiotics (like ciprofloxacin or levofloxacin), tetracycline antibiotics, cephalexin, penicillamine, ritonavir or other HIV medications including integrase inhibitors, cisplatin, or disulfiram. Zinc and nickel can reduce how well these drugs work, and timing your doses 2 to 6 hours apart may be necessary.
The bottom line
Scorecard at a glanceFully disclosed formula with strong clinical evidence behind its ingredients' uses. Moderate medication interactions have been identified, and safety information is well characterized.
Zinc alone has solid evidence for deficiency and some conditions; nickel and cobalt do not. If you're deficient in one of these minerals, your doctor can guide you.
Because cobalt supplements carry real toxicity risks with little proven benefit, and because zinc interacts with many antibiotics and HIV drugs, talk with your doctor or pharmacist before starting this product — especially if you take any prescription medications.
Educational only — not medical advice; always confirm with your pharmacist. Our editorial policy · How we use AI
Assessment coverage: 3 of 3 active ingredients matched to our full ingredient reviews (monographs). Based on the product label dated Feb 23, 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
General information
Key facts about Gammadyn Zn-Ni-Co, straight from the product label.
| Brand | UNDA Gammadyn |
|---|---|
| Barcode (UPC) | 88319631440 |
| Net contents | 30 Ampoule(s) |
| Market status | On market |
| Date entered into DSLD | Feb 23, 2022 |
| DSLD ID | 260226 |
| Product type | Mineral |
| Supplement form | Liquid |
| Dietary claims / uses | Nutrient, All Other |
| Intended target group(s) | Adult (18 - 50 Years), Women (not pregnant or lactating) |
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 Gammadyn Zn-Ni-Co by UNDA Gammadyn, sourced from the NIH Dietary Supplement Label Database.
Supplement Facts
| Ingredient | Amount | % DV |
|---|---|---|
| Zinc | 0.067 mg | 1% |
| Cobalt | 0.073 mg | -- |
| Nickel | 0.073 mg | -- |
Other ingredients: Water, Purified, Glucose
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.
Formula
Zinc-Nickel-Cobalt
FDA Statement of Identity
Oligo-Element Supplement
Suggested/Recommended/Usage/Directions
Recommended dose: Adults (19 years and older): Take one ampoule one to two times daily with meals, a few hours before or after taking medications, or as recommended by your healthcare practitioner. Squeeze contents directly into mouth. Use for one to two months or as recommended by your healthcare practitioner.
Precautions
Risk information: If you have iodine deficiency; or if you have cancer, tuberculosis or a history of tuberculosis, do not use.
If you are pregnant or breastfeeding, do not use, unless directed by your healthcare practitioner.
If gastrointestinal upset and/or skin rashes occur, discontinue use and consult your healthcare practitioner. Safety-sealed for you protection and for product freshness. Do not use if ampoule is broken.
Storage
Store in a cool, dry place.
Formulation
Made in Spain for UNDA
Is this label outdated? Report a formula or label change and our pharmacy team will review it.
Gammadyn Zn-Ni-Co by UNDA Gammadyn 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 Gammadyn Zn-Ni-Co by UNDA Gammadyn
These are the 3 active ingredients this product is made of. Select any to open its full monograph.
Serving size0.07 fl. Oz. Dosage formLiquid 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 with67 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 suppleme...
Zinc monograph & interactionsCobalt
No knowninteractions
Cobalt is a trace element that the body only needs as part of vitamin B12 (cobalamin); there is no proven reason to take inorganic cobalt supplements,...
Cobalt monograph & interactionsNickel
Interacts with1 drug
Nickel is a trace element found in tiny amounts in many foods, and most people get plenty through diet. There is no proven need for nickel supplements...
Nickel monograph & interactionsOther (inactive) ingredients: Water, Purified, Glucose. These complete the product’s ingredient list but are not active constituents.
Gammadyn Zn-Ni-Co by UNDA Gammadyn Drug Interactions
HelloPharmacist Interaction Report
UNDA Gammadyn Zn-Ni-Co contains zinc and nickel, both of which interact with medications.
Zinc's most serious interactions are Moderate-severity effects on quinolone antibiotics (ciprofloxacin, levofloxacin, and similar drugs), which can lose effectiveness if taken at the same time as zinc.
Read the full breakdown — every affected drug type, severity by severity
Zinc also interacts moderately with tetracycline antibiotics, cephalexin, penicillamine, ritonavir, cisplatin, integrase inhibitors, and the HIV combination drug biktarvy/emtricitabine/tenofovir alafenamide — all through the same mechanism of binding to these drugs in your gut and reducing how much your body absorbs. Timing your doses (usually 2 to 6 hours apart, depending on the drug) can reduce the problem.
Nickel has one documented Moderate interaction: it may reduce the effectiveness of disulfiram (used to support alcohol abstinence). We could not check nickel's data for any other drug interactions — they may exist but aren't on file for us.
Altogether, these interactions span 68 individual medications. If you take any prescription drugs, run them through the medication checker on this page before you start.
Check your own medications below · Editorial policy · How we use AI
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Go to the checkerIngredients driving the most interactions
Individual Drug Interactions
The ingredients in Gammadyn Zn-Ni-Co interact with 68 drugs. Click any drug to see the details.
2 of the 3 ingredients in Gammadyn Zn-Ni-Co interact with drugs. Each result below shows which ingredient is responsible. Zinc Nickel
GemifloxacinFactive
How Gemifloxacin interacts with Gammadyn Zn-Ni-Co — through 1 ingredient. Tap an ingredient for the detail:
ZincQuinolone Antibiotics Moderate
Interaction Summary
Zinc can decrease the levels and clinical effects of quinolones antibiotics.
Read the full Zinc + Gemifloxacin interactionGrepafloxacinRaxar
How Grepafloxacin interacts with Gammadyn Zn-Ni-Co — through 1 ingredient. Tap an ingredient for the detail:
ZincQuinolone Antibiotics Moderate
Interaction Summary
Zinc can decrease the levels and clinical effects of quinolones antibiotics.
Read the full Zinc + Grepafloxacin interactionLamivudine, RaltegravirDutrebis
How Lamivudine, Raltegravir interacts with Gammadyn Zn-Ni-Co — through 1 ingredient. Tap an ingredient for the detail:
ZincIntegrase Inhibitors Moderate
Interaction Summary
Theoretically, taking zinc along with integrase inhibitors might decrease the levels and clinical effects of these drugs.
Read the full Zinc + Lamivudine, Raltegravir interactionLamivudine, Tenofovir Disoproxil FumarateTemixys
How Lamivudine, Tenofovir Disoproxil Fumarate interacts with Gammadyn Zn-Ni-Co — through 1 ingredient. Tap an ingredient for the detail:
ZincBictegravir/emtricitabine/tenofovir Alafenamide (biktarvy) Moderate
Interaction Summary
Theoretically, zinc might decrease levels of bictegravir/emtricitabine/tenofovir alafenamide by reducing its absorption.
Read the full Zinc + Lamivudine, Tenofovir Disoproxil Fumarate interactionLevofloxacinLeva-pak, Levaquin, Levaquin Injection
How Levofloxacin interacts with Gammadyn Zn-Ni-Co — through 1 ingredient. Tap an ingredient for the detail:
ZincQuinolone Antibiotics Moderate
Interaction Summary
Zinc can decrease the levels and clinical effects of quinolones antibiotics.
Read the full Zinc + Levofloxacin interactionLevofloxacin (ophthalmic)Levofloxacin
How Levofloxacin (ophthalmic) interacts with Gammadyn Zn-Ni-Co — through 1 ingredient. Tap an ingredient for the detail:
ZincQuinolone Antibiotics Moderate
Interaction Summary
Zinc can decrease the levels and clinical effects of quinolones antibiotics.
Read the full Zinc + Levofloxacin (ophthalmic) interactionLomefloxacinMaxaquin
How Lomefloxacin interacts with Gammadyn Zn-Ni-Co — through 1 ingredient. Tap an ingredient for the detail:
ZincQuinolone Antibiotics Moderate
Interaction Summary
Zinc can decrease the levels and clinical effects of quinolones antibiotics.
Read the full Zinc + Lomefloxacin interactionLopinavir, RitonavirKaletra
How Lopinavir, Ritonavir interacts with Gammadyn Zn-Ni-Co — through 1 ingredient. Tap an ingredient for the detail:
ZincRitonavir (norvir) Moderate
Interaction Summary
Zinc modestly reduces levels of ritonavir.
Read the full Zinc + Lopinavir, Ritonavir interactionMetronidazole, Tetracyline, Bismuth Subcitrate PotassiumPylera
How Metronidazole, Tetracyline, Bismuth Subcitrate Potassium interacts with Gammadyn Zn-Ni-Co — through 1 ingredient. Tap an ingredient for the detail:
ZincTetracycline Antibiotics Moderate
Interaction Summary
Zinc might reduce levels of tetracycline antibiotics.
Read the full Zinc + Metronidazole, Tetracyline, Bismuth Subcitrate Potassium interactionMinocyclineAcnamino MR, Aknemin, Amzeeq, Arestin Miscrosperes, Dynacin, Minocin +6 more
How Minocycline interacts with Gammadyn Zn-Ni-Co — through 1 ingredient. Tap an ingredient for the detail:
ZincTetracycline Antibiotics Moderate
Interaction Summary
Zinc might reduce levels of tetracycline antibiotics.
Read the full Zinc + Minocycline interactionMinocycline HydrochlorideMinolira, Ximino
How Minocycline Hydrochloride interacts with Gammadyn Zn-Ni-Co — through 1 ingredient. Tap an ingredient for the detail:
ZincTetracycline Antibiotics Moderate
Interaction Summary
Zinc might reduce levels of tetracycline antibiotics.
Read the full Zinc + Minocycline Hydrochloride interactionMoxifloxacinAvelox
How Moxifloxacin interacts with Gammadyn Zn-Ni-Co — through 1 ingredient. Tap an ingredient for the detail:
ZincQuinolone Antibiotics Moderate
Interaction Summary
Zinc can decrease the levels and clinical effects of quinolones antibiotics.
Read the full Zinc + Moxifloxacin interactionNalidixic AcidNegGram
How Nalidixic Acid interacts with Gammadyn Zn-Ni-Co — through 1 ingredient. Tap an ingredient for the detail:
ZincQuinolone Antibiotics Moderate
Interaction Summary
Zinc can decrease the levels and clinical effects of quinolones antibiotics.
Read the full Zinc + Nalidixic Acid interactionNirmatrelvir, RitonavirPaxlovid
How Nirmatrelvir, Ritonavir interacts with Gammadyn Zn-Ni-Co — through 1 ingredient. Tap an ingredient for the detail:
ZincRitonavir (norvir) Moderate
Interaction Summary
Zinc modestly reduces levels of ritonavir.
Read the full Zinc + Nirmatrelvir, Ritonavir interactionNorfloxacinNorflox, Noroxin
How Norfloxacin interacts with Gammadyn Zn-Ni-Co — through 1 ingredient. Tap an ingredient for the detail:
ZincQuinolone Antibiotics Moderate
Interaction Summary
Zinc can decrease the levels and clinical effects of quinolones antibiotics.
Read the full Zinc + Norfloxacin interactionOfloxacinFloxin, Floxin Injection, Floxin Otic, Oflox
How Ofloxacin interacts with Gammadyn Zn-Ni-Co — through 1 ingredient. Tap an ingredient for the detail:
ZincQuinolone Antibiotics Moderate
Interaction Summary
Zinc can decrease the levels and clinical effects of quinolones antibiotics.
Read the full Zinc + Ofloxacin interactionOmadacycline (iv)Nuzyra
How Omadacycline (iv) interacts with Gammadyn Zn-Ni-Co — through 1 ingredient. Tap an ingredient for the detail:
ZincTetracycline Antibiotics Moderate
Interaction Summary
Zinc might reduce levels of tetracycline antibiotics.
Read the full Zinc + Omadacycline (iv) interactionOmadacycline (oral)Nuzyra
How Omadacycline (oral) interacts with Gammadyn Zn-Ni-Co — through 1 ingredient. Tap an ingredient for the detail:
ZincTetracycline Antibiotics Moderate
Interaction Summary
Zinc might reduce levels of tetracycline antibiotics.
Read the full Zinc + Omadacycline (oral) interactionOmbitasvir, Paritaprevir RitonavirTechnivie
How Ombitasvir, Paritaprevir Ritonavir interacts with Gammadyn Zn-Ni-Co — through 1 ingredient. Tap an ingredient for the detail:
ZincRitonavir (norvir) Moderate
Interaction Summary
Zinc modestly reduces levels of ritonavir.
Read the full Zinc + Ombitasvir, Paritaprevir Ritonavir interactionOmbitasvir, Paritaprevir, Ritonavir, DasabuvirViekira Pak
How Ombitasvir, Paritaprevir, Ritonavir, Dasabuvir interacts with Gammadyn Zn-Ni-Co — through 1 ingredient. Tap an ingredient for the detail:
ZincRitonavir (norvir) Moderate
Interaction Summary
Zinc modestly reduces levels of ritonavir.
Read the full Zinc + Ombitasvir, Paritaprevir, Ritonavir, Dasabuvir interactionOxytetracyclineTerramycin
How Oxytetracycline interacts with Gammadyn Zn-Ni-Co — through 1 ingredient. Tap an ingredient for the detail:
ZincTetracycline Antibiotics Moderate
Interaction Summary
Zinc might reduce levels of tetracycline antibiotics.
Read the full Zinc + Oxytetracycline interactionOxytetracycline, Phenazopyridine, SulfamethizoleUrobiotic
How Oxytetracycline, Phenazopyridine, Sulfamethizole interacts with Gammadyn Zn-Ni-Co — through 1 ingredient. Tap an ingredient for the detail:
ZincTetracycline Antibiotics Moderate
Interaction Summary
Zinc might reduce levels of tetracycline antibiotics.
Read the full Zinc + Oxytetracycline, Phenazopyridine, Sulfamethizole interactionOzenoxacinXepi
How Ozenoxacin interacts with Gammadyn Zn-Ni-Co — through 1 ingredient. Tap an ingredient for the detail:
ZincQuinolone Antibiotics Moderate
Interaction Summary
Zinc can decrease the levels and clinical effects of quinolones antibiotics.
Read the full Zinc + Ozenoxacin interactionPenicillamineCuprimine, Depen Titratable
How Penicillamine interacts with Gammadyn Zn-Ni-Co — through 1 ingredient. Tap an ingredient for the detail:
ZincPenicillamine (cuprimine, Depen) Moderate
Interaction Summary
Zinc might reduce the levels and clinical effects of penicillamine.
Read the full Zinc + Penicillamine interactionRaltegravirIsentress
How Raltegravir interacts with Gammadyn Zn-Ni-Co — through 1 ingredient. Tap an ingredient for the detail:
ZincIntegrase Inhibitors Moderate
Interaction Summary
Theoretically, taking zinc along with integrase inhibitors might decrease the levels and clinical effects of these drugs.
Read the full Zinc + Raltegravir interactionRetapamulinAltabax, Altargo
How Retapamulin interacts with Gammadyn Zn-Ni-Co — through 1 ingredient. Tap an ingredient for the detail:
ZincQuinolone Antibiotics, Tetracycline Antibiotics Moderate
Interaction Summary
Zinc can decrease the levels and clinical effects of quinolones antibiotics.
Read the full Zinc + Retapamulin interactionRitonavirNorvir
How Ritonavir interacts with Gammadyn Zn-Ni-Co — through 1 ingredient. Tap an ingredient for the detail:
ZincRitonavir (norvir) Moderate
Interaction Summary
Zinc modestly reduces levels of ritonavir.
Read the full Zinc + Ritonavir interactionSparfloxacinZagam
How Sparfloxacin interacts with Gammadyn Zn-Ni-Co — through 1 ingredient. Tap an ingredient for the detail:
ZincQuinolone Antibiotics Moderate
Interaction Summary
Zinc can decrease the levels and clinical effects of quinolones antibiotics.
Read the full Zinc + Sparfloxacin interactionTenofovir Disoproxil FumarateViread
How Tenofovir Disoproxil Fumarate interacts with Gammadyn Zn-Ni-Co — through 1 ingredient. Tap an ingredient for the detail:
ZincBictegravir/emtricitabine/tenofovir Alafenamide (biktarvy) Moderate
Interaction Summary
Theoretically, zinc might decrease levels of bictegravir/emtricitabine/tenofovir alafenamide by reducing its absorption.
Read the full Zinc + Tenofovir Disoproxil Fumarate interactionTenofovir, Emtricitabine, EfavirenzAtripla
How Tenofovir, Emtricitabine, Efavirenz interacts with Gammadyn Zn-Ni-Co — through 1 ingredient. Tap an ingredient for the detail:
ZincBictegravir/emtricitabine/tenofovir Alafenamide (biktarvy) Moderate
Interaction Summary
Theoretically, zinc might decrease levels of bictegravir/emtricitabine/tenofovir alafenamide by reducing its absorption.
Read the full Zinc + Tenofovir, Emtricitabine, Efavirenz interactionEach ingredient & the kinds of drugs it affects
For each ingredient in Gammadyn Zn-Ni-Co 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.
Zinc
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
Nickel
Disulfiram (Antabuse)
Disulfiram can reduce the absorption and clinical effects of nickel.
Disulfiram can chelate nickel, preventing its absorption. This interaction has been used therapeutically to reduce eczema in people with severe nickel hypersensitivity.
Brand information
Manufacturer and brand details for Gammadyn Zn-Ni-Co, from the product label.
UNDA Gammadyn
See all UNDA Gammadyn products- Name
- Seroyal USA
- City
- Pittsburgh
- State
- PA
- ZipCode
- 15275
Gammadyn Zn-Ni-Co by UNDA Gammadyn: Common Questions
Does Gammadyn Zn-Ni-Co by UNDA Gammadyn interact with any medications?
How can one product interact with so many drugs?
Where does this information come from?
Is zinc safe to take long-term?
What are the common side effects of zinc?
Is cobalt safe in this supplement?
Does nickel have interactions with my medications?
Can I take this product while pregnant or breastfeeding?
What does nickel do in the body?
Written and reviewed by the HelloPharmacist editorial staff. Our editorial policy
Not sure if Gammadyn Zn-Ni-Co is safe with your meds?
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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 Gammadyn Zn-Ni-Co’s Ingredients
Every ingredient we hold a full HelloPharmacist monograph for — uses, evidence, safety, and the complete interaction list.
Zinc
Interacts with 67 drugsZinc 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 monographCobalt
Cobalt is a trace element that the body only needs as part of vitamin B12 (cobalamin); there is no proven reason to take inorganic cobalt supplements, and doing so can be harmful. If you nee...
Read the full Cobalt monograph → Herb & supplement monographNickel
Interacts with 1 drugNickel is a trace element found in tiny amounts in many foods, and most people get plenty through diet. There is no proven need for nickel supplements, and because nickel is a common cause o...
Read the full Nickel monograph →Sources & How We Checked
Gammadyn Zn-Ni-Co'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 175 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
- Barceloux DG. Zinc. J Toxicol Clin Toxicol 1999;37:279-92.
- 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
- 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
- Blondeau JM. Expanded activity and utility of the new fluoroquinolones: a review. Clin Ther 1999;21:3-40. PubMed
- 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.
- Kugelmas M. Preliminary observation: oral zinc sulfate replacement is effective in treating muscle cramps in cirrhotic patients. J Am Coll Nutr 2000;19:13-5. PubMed
- Hebel SK, ed. Drug Facts and Comparisons. 52nd ed. St. Louis: Facts and Comparisons, 1998.
- Chan S, Gerson B, Subramaniam S. The role of copper, molybdenum, selenium, and zinc in nutrition and health. Clin Lab Med 1998;18:673-85. DOI
- Brewer GJ, Yuzbasiyan-Gurkan V, Johnson V, et al. Treatment of Wilson's disease with zinc: XI. Interaction with other anticopper agents. J Am Coll Nutr 1993;12:26-30. PubMed
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