Mega Greens Ingredients & Drug Interactions
by DC
What is this page for?
First and foremost: checking Mega Greens 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
Mega Greens is a dietary supplement by DC with 3 active ingredients. Its ingredients are commonly taken for general nutrition and 'detox' support, immune support, liver and kidney support.Based on those ingredients, 626 medications have a known interaction with it, the most serious rated moderate. The ingredients most likely to interact are Chlorella, Klamath Blue Green Algae. Use the checker below to test your specific medication, or read the full HelloPharmacist Interaction Report.
Check Your Meds Against Mega Greens by DC
Ask about any prescription or over-the-counter medication and we check it for interactions with Mega Greens by DC — 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 Mega Greens by DC
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
DC Mega Greens contains three active ingredients: chlorella, klamath blue green algae, and spirulina. Chlorella is a freshwater algae used for general nutritional support.
Klamath blue green algae and spirulina are both blue-green algae species marketed for similar wellness purposes. The product also contains gelatin and vegetable magnesium stearate as inactive ingredients (binders and capsule material).
Does it work?
Moderate evidence
The evidence for chlorella is mixed: it's rated possibly effective for pregnancy-related iron deficiency, but the data is insufficient to rate it for brain tumor, fatty liver disease, depression, and fatigue. For klamath blue green algae and spirulina, the facts show they're rated possibly effective for high blood pressure, but evidence is insufficient to rate them for acne, hay fever, iron deficiency anemia, and arsenic poisoning.
In short, the strongest support here is for high blood pressure with the algae ingredients; most other uses lack established evidence.
How safe is it?
Well-documented data
Chlorella is generally well tolerated in the short term, though product quality and purity vary widely — that's important because contamination is a real concern. Common side effects include allergic reactions, stomach cramping, constipation or diarrhea, fatigue, gas, nausea, photosensitivity, and stool discoloration; anaphylaxis is rare but serious.
The blue-green algae ingredients (klamath and spirulina) are also generally well tolerated, but again quality varies and contamination with toxins or heavy metals is a concern. Common side effects are stomach cramps, bloating, diarrhea, dizziness, fatigue, gas, headache, nausea, and vomiting.
Allergic reactions including rashes, itching, and anaphylaxis have been reported, and a small number of people reported mild gum bleeding or bruising. For pregnancy, chlorella is rated possibly safe, but there isn't enough safety data for klamath blue green algae or spirulina — talk with your doctor or pharmacist before taking this product if you're pregnant or nursing.
Meds to double-check
Moderate interaction found
Check with your doctor or pharmacist before taking Mega Greens if you take blood thinners (including warfarin/Coumadin) or antiplatelet drugs like aspirin — chlorella's vitamin K can interfere with warfarin, and the algae may increase bleeding risk. Also double-check if you're on diabetes medications (risk of low blood sugar), immune suppressants, or any photosensitizing drugs.
The bottom line
Scorecard at a glanceFully disclosed formula with some supporting evidence behind its ingredients' uses. Moderate medication interactions have been identified, and safety information is well characterized.
Mega Greens is a three-algae blend with some evidence for high blood pressure support, but the real consideration here is medication interaction risk — especially if you're on blood thinners, diabetes drugs, immune suppressants, or photosensitizing medications. Product quality and contamination are also concerns with all three ingredients.
Before you start, check your exact medications with the tool on this page and talk it over with your doctor or pharmacist.
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 Apr 11, 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 Mega Greens, straight from the product label.
| Brand | DC |
|---|---|
| Net contents | 60 Capsule(s) |
| Market status | On market |
| Date entered into DSLD | Apr 11, 2022 |
| DSLD ID | 265898 |
| Product type | Non-nutrient/non-botanical |
| Supplement form | Capsule |
| Dietary claims / uses | All Other, Structure/Function |
| Intended target group(s) | Adult (18 - 50 Years), Women (not pregnant or lactating), Gluten 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 Mega Greens by DC, sourced from the NIH Dietary Supplement Label Database.
Supplement Facts
| Ingredient | Amount | % DV |
|---|---|---|
| Chlorella | 200 mg | -- |
| Klamath Blue Green Algae | 200 mg | -- |
| Spirulina | 200 mg | -- |
Other ingredients: Gelatin, Vegetable Magnesium Stearate
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.
Suggested/Recommended/Usage/Directions
Directions: As a dietary supplement, take 1 capsule twice daily.
Formulation
A protein-rich vegetable food source, high in essential nutrients.
Mfg. in an FDA Registered Facility using Good Manufacturing Practices (GMPs)
Conforms to USP <2091> for weight. Meets USP <2040> disintegration for maximum bioavailability.
Gluten free
Antioxidant support
Made in USA
Precautions
Tamper Evident: Do not use this product if imprinted foil seal under cap is broken or missing.
Keep out of reach of children.
Caution: If you are pregnant or nursing do not take this product.
Storage
Keep tightly closed. Store at room temperature: 59 degrees - 86 degrees F (15 degrees to 30 degrees C).
FDA Disclaimer Statement
This statement has not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure or prevent any disease.
Seals/Symbols
Quali Pure
Formula
Chlorella Klamath Spirulina
FDA Statement of Identity
Dietary Supplement
Is this label outdated? Report a formula or label change and our pharmacy team will review it.
Mega Greens by DC 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 Mega Greens by DC
These are the 3 active ingredients this product is made of. Select any to open its full monograph.
Serving size1 Capsule(s) Dosage formCapsule Servings per container60 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.
Chlorella
Interacts with337 drugs
Chlorella is a nutrient-rich freshwater green algae taken as a supplement for general wellness, immune support, and 'detox.' Some small studies sugges...
Chlorella monograph & interactionsKlamath Blue Green Algae
Interacts with327 drugs
Blue-green algae are nutrient-rich aquatic microorganisms (such as spirulina and Klamath Lake algae) taken as a supplement for energy, nutrition, and...
Klamath Blue Green Algae monograph & interactionsSpirulina
Interacts with327 drugs
Blue-green algae are nutrient-rich aquatic microorganisms (such as spirulina and Klamath Lake algae) taken as a supplement for energy, nutrition, and...
Spirulina monograph & interactionsOther (inactive) ingredients: Gelatin, Vegetable Magnesium Stearate. These complete the product’s ingredient list but are not active constituents.
Mega Greens by DC Drug Interactions
HelloPharmacist Interaction Report
DC Mega Greens interacts with medications through its chlorella, klamath blue green algae, and spirulina content.
The most serious concern is a Moderate-severity interaction with blood thinners (anticoagulants) and antiplatelet drugs like aspirin — both the algae ingredients may increase bleeding risk, and chlorella's high vitamin K content can reduce how well warfarin (Coumadin) works.
Read the full breakdown — every affected drug type, severity by severity
Chlorella also has a Moderate interaction with photosensitizing drugs (medications that make your skin more sensitive to sun damage), since chlorella itself can cause photosensitivity and may add to that effect. The algae ingredients — klamath blue green algae and spirulina — interact with three other drug types.
They may interfere with immune-suppressing medications, raise the risk of low blood sugar (hypoglycemia) if you're on diabetes drugs, and theoretically increase bleeding risk with blood thinners.
Overall, these interactions span 626 individual medications. Before you start Mega Greens, run your exact prescriptions through the search tool on this page, and talk with your doctor or pharmacist about whether it's safe to take alongside what you're on.
Check your own medications below · Editorial policy · How we use AI
Want to check YOUR meds against Mega Greens?
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 Mega Greens interact with 626 drugs. Click any drug to see the details.
2 of the 3 ingredients in Mega Greens interact with drugs. Each result below shows which ingredient is responsible. Chlorella Klamath Blue Green Algae
6-mercaptopurinePurinethol
How 6-mercaptopurine interacts with Mega Greens — through 1 ingredient. Tap an ingredient for the detail:
SpirulinaImmunosuppressants Moderate
Interaction Summary
Theoretically, concurrent use of blue-green algae might interfere with immunosuppressive therapy.
Read the full Spirulina + 6-mercaptopurine interactionAbciximabReoPro
How Abciximab interacts with Mega Greens — through 1 ingredient. Tap an ingredient for the detail:
SpirulinaAnticoagulant/antiplatelet Drugs Moderate
Interaction Summary
Theoretically, spirulina blue-green algae might increase the risk of bleeding if used with other anticoagulant or antiplatelet drugs.
Read the full Spirulina + Abciximab interactionAbrocitinibCibinqo
How Abrocitinib interacts with Mega Greens — through 1 ingredient. Tap an ingredient for the detail:
SpirulinaAnticoagulant/antiplatelet Drugs, Immunosuppressants Moderate
Interaction Summary
Theoretically, spirulina blue-green algae might increase the risk of bleeding if used with other anticoagulant or antiplatelet drugs.
Read the full Spirulina + Abrocitinib interactionAcarboseGlucobay, Prandase, Precose
How Acarbose interacts with Mega Greens — through 1 ingredient. Tap an ingredient for the detail:
SpirulinaAntidiabetes Drugs Moderate
Interaction Summary
Theoretically, taking blue-green algae with antidiabetes drugs might increase the risk of hypoglycemia.
Read the full Spirulina + Acarbose interactionAcenocoumarolSintrom
How Acenocoumarol interacts with Mega Greens — through 1 ingredient. Tap an ingredient for the detail:
SpirulinaAnticoagulant/antiplatelet Drugs Moderate
Interaction Summary
Theoretically, spirulina blue-green algae might increase the risk of bleeding if used with other anticoagulant or antiplatelet drugs.
Read the full Spirulina + Acenocoumarol interactionAcepromazineAtravet
How Acepromazine interacts with Mega Greens — through 1 ingredient. Tap an ingredient for the detail:
ChlorellaPhotosensitizing Drugs Moderate
Interaction Summary
Theoretically, chlorella might have additive effects with photosensitizing drugs.
Read the full Chlorella + Acepromazine interactionAcetaminophen, AspirinGemnisyn
How Acetaminophen, Aspirin interacts with Mega Greens — through 1 ingredient. Tap an ingredient for the detail:
SpirulinaAnticoagulant/antiplatelet Drugs Moderate
Interaction Summary
Theoretically, spirulina blue-green algae might increase the risk of bleeding if used with other anticoagulant or antiplatelet drugs.
Read the full Spirulina + Acetaminophen, Aspirin interactionAcetaminophen, Aspirin, CaffeineExcedrin, Excedrin Extra Strength, Excedrin Migraine
How Acetaminophen, Aspirin, Caffeine interacts with Mega Greens — through 1 ingredient. Tap an ingredient for the detail:
SpirulinaAnticoagulant/antiplatelet Drugs Moderate
Interaction Summary
Theoretically, spirulina blue-green algae might increase the risk of bleeding if used with other anticoagulant or antiplatelet drugs.
Read the full Spirulina + Acetaminophen, Aspirin, Caffeine interactionAcetaminophen, Brompheniramine, PhenylpropanolamineDimetapp Cold and Flu
How Acetaminophen, Brompheniramine, Phenylpropanolamine interacts with Mega Greens — through 1 ingredient. Tap an ingredient for the detail:
ChlorellaPhotosensitizing Drugs Moderate
Interaction Summary
Theoretically, chlorella might have additive effects with photosensitizing drugs.
Read the full Chlorella + Acetaminophen, Brompheniramine, Phenylpropanolamine interactionAcetaminophen, Caffeine, Chlorpheniramine, Hydrocodone, PhenylephrineHycomine Compound
How Acetaminophen, Caffeine, Chlorpheniramine, Hydrocodone, Phenylephrine interacts with Mega Greens — through 1 ingredient. Tap an ingredient for the detail:
ChlorellaPhotosensitizing Drugs Moderate
Interaction Summary
Theoretically, chlorella might have additive effects with photosensitizing drugs.
Read the full Chlorella + Acetaminophen, Caffeine, Chlorpheniramine, Hydrocodone, Phenylephrine interactionAcetaminophen, Chlorpheniramine Maleate, Dextromethorphan HbrVicks Formula 44M Cough, Cold & Flu Relief
How Acetaminophen, Chlorpheniramine Maleate, Dextromethorphan Hbr interacts with Mega Greens — through 1 ingredient. Tap an ingredient for the detail:
ChlorellaPhotosensitizing Drugs Moderate
Interaction Summary
Theoretically, chlorella might have additive effects with photosensitizing drugs.
Read the full Chlorella + Acetaminophen, Chlorpheniramine Maleate, Dextromethorphan Hbr interactionAcetaminophen, Chlorpheniramine, Codeine, PhenylephrineColrex
How Acetaminophen, Chlorpheniramine, Codeine, Phenylephrine interacts with Mega Greens — through 1 ingredient. Tap an ingredient for the detail:
ChlorellaPhotosensitizing Drugs Moderate
Interaction Summary
Theoretically, chlorella might have additive effects with photosensitizing drugs.
Read the full Chlorella + Acetaminophen, Chlorpheniramine, Codeine, Phenylephrine interactionAcetaminophen, Chlorpheniramine, DextromethorphanCoricidin II Extra Strength Cold and Flu
How Acetaminophen, Chlorpheniramine, Dextromethorphan interacts with Mega Greens — through 1 ingredient. Tap an ingredient for the detail:
ChlorellaPhotosensitizing Drugs Moderate
Interaction Summary
Theoretically, chlorella might have additive effects with photosensitizing drugs.
Read the full Chlorella + Acetaminophen, Chlorpheniramine, Dextromethorphan interactionAcetaminophen, Chlorpheniramine, Dextromethorphan HydrobromideCoricidin HBP Maximum Strength Flu
How Acetaminophen, Chlorpheniramine, Dextromethorphan Hydrobromide interacts with Mega Greens — through 1 ingredient. Tap an ingredient for the detail:
ChlorellaPhotosensitizing Drugs Moderate
Interaction Summary
Theoretically, chlorella might have additive effects with photosensitizing drugs.
Read the full Chlorella + Acetaminophen, Chlorpheniramine, Dextromethorphan Hydrobromide interactionAcetaminophen, Chlorpheniramine, Dextromethorphan, PhenylpropanolamineMulti Symptom Cold Relief
How Acetaminophen, Chlorpheniramine, Dextromethorphan, Phenylpropanolamine interacts with Mega Greens — through 1 ingredient. Tap an ingredient for the detail:
ChlorellaPhotosensitizing Drugs Moderate
Interaction Summary
Theoretically, chlorella might have additive effects with photosensitizing drugs.
Read the full Chlorella + Acetaminophen, Chlorpheniramine, Dextromethorphan, Phenylpropanolamine interactionAcetaminophen, Chlorpheniramine, Dextromethorphan, PseudoephedrineChildren's Tylenol Cold Plus Cough, Tylenol Cold Ex Strength
How Acetaminophen, Chlorpheniramine, Dextromethorphan, Pseudoephedrine interacts with Mega Greens — through 1 ingredient. Tap an ingredient for the detail:
ChlorellaPhotosensitizing Drugs Moderate
Interaction Summary
Theoretically, chlorella might have additive effects with photosensitizing drugs.
Read the full Chlorella + Acetaminophen, Chlorpheniramine, Dextromethorphan, Pseudoephedrine interactionAcetaminophen, Chlorpheniramine, Guaifenesin, Phenylephrine, SalicylamideRhinogesic GG
How Acetaminophen, Chlorpheniramine, Guaifenesin, Phenylephrine, Salicylamide interacts with Mega Greens — through 1 ingredient. Tap an ingredient for the detail:
ChlorellaPhotosensitizing Drugs Moderate
Interaction Summary
Theoretically, chlorella might have additive effects with photosensitizing drugs.
Read the full Chlorella + Acetaminophen, Chlorpheniramine, Guaifenesin, Phenylephrine, Salicylamide interactionAcetaminophen, Chlorpheniramine, PhenylephrineAlka-Seltzer PLUS, Histex SR, Protid
How Acetaminophen, Chlorpheniramine, Phenylephrine interacts with Mega Greens — through 1 ingredient. Tap an ingredient for the detail:
ChlorellaPhotosensitizing Drugs Moderate
Interaction Summary
Theoretically, chlorella might have additive effects with photosensitizing drugs.
Read the full Chlorella + Acetaminophen, Chlorpheniramine, Phenylephrine interactionAcetaminophen, Chlorpheniramine, Phenylephrine, SalicylamideRhinogesic, Rhinogesic JR
How Acetaminophen, Chlorpheniramine, Phenylephrine, Salicylamide interacts with Mega Greens — through 1 ingredient. Tap an ingredient for the detail:
ChlorellaPhotosensitizing Drugs Moderate
Interaction Summary
Theoretically, chlorella might have additive effects with photosensitizing drugs.
Read the full Chlorella + Acetaminophen, Chlorpheniramine, Phenylephrine, Salicylamide interactionAcetaminophen, Chlorpheniramine, PhenylpropanolamineAlumadrine, Conex, Sinadrin Max Strength, Sinulin
How Acetaminophen, Chlorpheniramine, Phenylpropanolamine interacts with Mega Greens — through 1 ingredient. Tap an ingredient for the detail:
ChlorellaPhotosensitizing Drugs Moderate
Interaction Summary
Theoretically, chlorella might have additive effects with photosensitizing drugs.
Read the full Chlorella + Acetaminophen, Chlorpheniramine, Phenylpropanolamine interactionAcetaminophen, Chlorpheniramine, Phenylpropanolamine, OpiumHista-Derfule
How Acetaminophen, Chlorpheniramine, Phenylpropanolamine, Opium interacts with Mega Greens — through 1 ingredient. Tap an ingredient for the detail:
ChlorellaPhotosensitizing Drugs Moderate
Interaction Summary
Theoretically, chlorella might have additive effects with photosensitizing drugs.
Read the full Chlorella + Acetaminophen, Chlorpheniramine, Phenylpropanolamine, Opium interactionAcetaminophen, Chlorpheniramine, Phenylpropanolamine, PhenyltoloxamineNorel Plus
How Acetaminophen, Chlorpheniramine, Phenylpropanolamine, Phenyltoloxamine interacts with Mega Greens — through 1 ingredient. Tap an ingredient for the detail:
ChlorellaPhotosensitizing Drugs Moderate
Interaction Summary
Theoretically, chlorella might have additive effects with photosensitizing drugs.
Read the full Chlorella + 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 Mega Greens — through 1 ingredient. Tap an ingredient for the detail:
ChlorellaPhotosensitizing Drugs Moderate
Interaction Summary
Theoretically, chlorella might have additive effects with photosensitizing drugs.
Read the full Chlorella + Acetaminophen, Chlorpheniramine, Pseudoephedrine interactionAcetaminophen, Dexbrompheniramine, PseudoephedrineSinadrin Plus
How Acetaminophen, Dexbrompheniramine, Pseudoephedrine interacts with Mega Greens — through 1 ingredient. Tap an ingredient for the detail:
ChlorellaPhotosensitizing Drugs Moderate
Interaction Summary
Theoretically, chlorella might have additive effects with photosensitizing drugs.
Read the full Chlorella + Acetaminophen, Dexbrompheniramine, Pseudoephedrine interactionAcetaminophen, DiphenhydramineTylenol PM, Tylenol PM Ex Strength
How Acetaminophen, Diphenhydramine interacts with Mega Greens — through 1 ingredient. Tap an ingredient for the detail:
ChlorellaPhotosensitizing Drugs Moderate
Interaction Summary
Theoretically, chlorella might have additive effects with photosensitizing drugs.
Read the full Chlorella + Acetaminophen, Diphenhydramine interactionAcetaminophen, Diphenhydramine, PseudoephedrineChildren's Tylenol Allergy, Cold Control, Contac Night Allergy Relief
How Acetaminophen, Diphenhydramine, Pseudoephedrine interacts with Mega Greens — through 1 ingredient. Tap an ingredient for the detail:
ChlorellaPhotosensitizing Drugs Moderate
Interaction Summary
Theoretically, chlorella might have additive effects with photosensitizing drugs.
Read the full Chlorella + Acetaminophen, Diphenhydramine, Pseudoephedrine interactionAcetaminophen, IbuprofenCombogesic
How Acetaminophen, Ibuprofen interacts with Mega Greens — through 2 ingredients. Tap an ingredient for the detail:
ChlorellaPhotosensitizing Drugs Moderate
Interaction Summary
Theoretically, chlorella might have additive effects with photosensitizing drugs.
Read the full Chlorella + Acetaminophen, Ibuprofen interactionSpirulinaAnticoagulant/antiplatelet Drugs Moderate
Interaction Summary
Theoretically, spirulina blue-green algae might increase the risk of bleeding if used with other anticoagulant or antiplatelet drugs.
Read the full Spirulina + Acetaminophen, Ibuprofen interactionAcetaminophen, Phenylephrine, ChlorpheniramineSuper Cold Tabs
How Acetaminophen, Phenylephrine, Chlorpheniramine interacts with Mega Greens — through 1 ingredient. Tap an ingredient for the detail:
ChlorellaPhotosensitizing Drugs Moderate
Interaction Summary
Theoretically, chlorella might have additive effects with photosensitizing drugs.
Read the full Chlorella + Acetaminophen, Phenylephrine, Chlorpheniramine interactionAcetazolamideAk-Zol, Diamox
How Acetazolamide interacts with Mega Greens — through 1 ingredient. Tap an ingredient for the detail:
ChlorellaPhotosensitizing Drugs Moderate
Interaction Summary
Theoretically, chlorella might have additive effects with photosensitizing drugs.
Read the full Chlorella + Acetazolamide interactionAcetohexamideDymelor
How Acetohexamide interacts with Mega Greens — through 2 ingredients. Tap an ingredient for the detail:
ChlorellaPhotosensitizing Drugs Moderate
Interaction Summary
Theoretically, chlorella might have additive effects with photosensitizing drugs.
Read the full Chlorella + Acetohexamide interactionSpirulinaAntidiabetes Drugs Moderate
Interaction Summary
Theoretically, taking blue-green algae with antidiabetes drugs might increase the risk of hypoglycemia.
Read the full Spirulina + Acetohexamide interactionEach ingredient & the kinds of drugs it affects
For each ingredient in Mega Greens 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.
Chlorella
Photosensitizing Drugs
Theoretically, chlorella might have additive effects with photosensitizing drugs.
Chlorella has been reported to cause photosensitization. In five case reports, patients who had ingested chlorella exhibited swelling followed by erythematopurpuric lesions on sun-exposed areas of the body. Theoretically, concomitant use with photosensitizing drugs may exacerbate effects.
Warfarin (Coumadin)
Theoretically, chlorella might reduce the clinical effects of warfarin.
Chlorella contains significant amounts of vitamin K. There is at least one case report of warfarin therapy becoming sub-therapeutic after initiation of chlorella supplements.
Klamath Blue Green Algae
Anticoagulant/Antiplatelet Drugs
Theoretically, spirulina blue-green algae might increase the risk of bleeding if used with other anticoagulant or antiplatelet drugs. However, this is unlikely.
Spirulina blue-green algae have shown antiplatelet and anticoagulant effects in vitro. However, one preliminary study in 24 patients receiving spirulina blue-green algae 2.3 grams daily for 2 weeks showed no effect on platelet activation or measures of clotting time.
Antidiabetes Drugs
Theoretically, taking blue-green algae with antidiabetes drugs might increase the risk of hypoglycemia.
Human research shows that spirulina blue-green algae can have hypoglycemic effects in patients with diabetes, at least some of whom were using antidiabetes drugs. However, blue-green algae does not seem to improve glycated hemoglobin (HbA1c) levels in patients with diabetes. A meta-analysis of animal studies also suggests that spirulina blue-green algae have hypoglycemic effects.
Immunosuppressants
Theoretically, concurrent use of blue-green algae might interfere with immunosuppressive therapy.
Blue-green algae have been shown to stimulate the immune system.
Brand information
Manufacturer and brand details for Mega Greens, from the product label.
DC
See all DC products- Name
- Dee Cee Laboratories, Inc.
- Street Address
- 304 Dee Cee Rd.
- City
- White House
- State
- TN
- ZipCode
- 37188
Mega Greens by DC: Common Questions
Does Mega Greens by DC interact with any medications?
How can one product interact with so many drugs?
Where does this information come from?
Can I take Mega Greens if I'm pregnant?
Will this cause sun sensitivity?
What are the most common side effects?
Does this product work for high blood pressure?
Why do the product quality and purity matter so much?
Will this work for iron deficiency if I'm pregnant?
Written and reviewed by the HelloPharmacist editorial staff. Our editorial policy
Not sure if Mega Greens is safe with your meds?
Our pharmacists answer your medication & supplement questions — free.
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 Mega Greens’s Ingredients
Every ingredient we hold a full HelloPharmacist monograph for — uses, evidence, safety, and the complete interaction list.
Chlorella
Interacts with 337 drugsChlorella is a nutrient-rich freshwater green algae taken as a supplement for general wellness, immune support, and 'detox.' Some small studies suggest possible benefits for cholesterol, blo...
Read the full Chlorella monograph → Herb & supplement monographBlue-green Algae
Interacts with 327 drugsBlue-green algae are nutrient-rich aquatic microorganisms (such as spirulina and Klamath Lake algae) taken as a supplement for energy, nutrition, and general wellness. Evidence for most heal...
Read the full Blue-green Algae monograph →Sources & How We Checked
Mega Greens'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 35 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.
Chlorella 13 references
- Peirce A. The American Pharmaceutical Association Practical Guide to Natural Medicines. New York, NY: William Morrow and Co., 1999.
- Ng TP, Tan WC, Lee YK. Occupational asthma in a pharmacist induced by chlorella, a unicellular algae preparation. Resp Med 1994;88:555-7. PubMed
- Jitsukawa K, Suizu R, Hidano A. Chlorella photosensitization. New phytophotodermatosis. Int J Dermatol 1984;23:263-8. PubMed
- Merchant RE, Carmack CA, Wise CM. Nutritional supplementation with Chlorella pyrenoidosa for patients with fibromyalgia syndrome: a pilot study. Phytother Res 2000;14:167-73.
- Merchant RE, Rice CD, Young HF. Dietary Chlorella pyrenoidosa for patients with malignant glioma: effects on immunocompetence, quality of life, and survival. Phytother Res 1990;4:220-31.
- Halperin SA, Smith B, Nolan C, et al. Safety and immunoenhancing effect of a Chlorella-derived dietary supplement in healthy adults undergoing influenza vaccination: randomized, double-blind, placebo-controlled trial. CMAJ 2003;169:111-7..
- Ohtake, T., Negishi, K., Okamoto, K., Oka, M., Maesato, K., Moriya, H., and Kobayashi, S. Manganese-induced Parkinsonism in a patient undergoing maintenance hemodialysis. Am J Kidney Dis 2005;46(4):749-753. PubMed
- Ng, T. P., Tan, W. C., and Lee, Y. K. Occupational asthma in a pharmacist induced by Chlorella, a unicellular algae preparation. Respir.Med. 1994;88(7):555-557. PubMed
- Ohkawa, S., Yoneda, Y., Ohsumi, Y., and Tabuchi, M. [Warfarin therapy and chlorella]. Rinsho Shinkeigaku 1995;35(7):806-807.
- Azocar J, Diaz A. Efficacy and safety of chlorella supplementation in adults with chronic hepatitis C virus infection. World J Gastroenterol 2013;19(7):1085-90. PubMed
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