Spirulina Powder Ingredients & Drug Interactions
What is this page for?
First and foremost: checking Spirulina Powder 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
Spirulina Powder is a dietary supplement by Puritan's Pride with 3 active ingredients. Its ingredients are commonly taken for eye and vision health, skin health and acne, immune support.Based on those ingredients, 662 medications have a known interaction with it, the most serious rated major. The ingredients most likely to interact are Vitamin A, Spirulina powder. Use the checker below to test your specific medication, or read the full HelloPharmacist Interaction Report.
Check Your Meds Against Spirulina Powder by Puritan's Pride
Ask about any prescription or over-the-counter medication and we check it for interactions with Spirulina Powder by Puritan's Pride — 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 Spirulina Powder by Puritan's Pride
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
This powder contains two active ingredients: vitamin A and spirulina powder. Vitamin A is a fat-soluble vitamin that your body stores in fatty tissue; it plays a key role in vision, immune function, and skin health.
Spirulina is a blue-green algae rich in protein and other nutrients. The product also contains spirulina powder as an inactive ingredient (part of the formulation base).
Does it work?
Strong evidence
Vitamin A is effective for preventing and treating vitamin A deficiency. It's possibly effective for oral leukoplakia (patches in the mouth), aging skin, measles, ulcerative colitis, and bronchopulmonary dysplasia (a breathing condition in newborns).
For spirulina, the evidence is more limited. It's possibly effective for high blood pressure.
For acne, hay fever, iron deficiency anemia, and arsenic poisoning, we don't have enough reliable evidence to rate whether it works.
How safe is it?
Well-documented data
Vitamin A is generally well tolerated at recommended doses, but high doses are toxic because your body stores it in fat over time—this can cause liver damage, headaches, blurred vision, dry skin, and hair loss. At very high doses, serious effects including pseudotumor cerebri (a condition of increased pressure inside the skull) and even coma have been reported.
Pregnancy is a special concern: high-dose vitamin A supplements are possibly unsafe in pregnancy and may cause birth defects, though normal dietary and recommended supplement amounts are appropriate. Spirulina generally seems well tolerated, though common side effects include bloating, diarrhea, nausea, headache, and fatigue.
Rare allergic reactions including anaphylaxis (severe whole-body reaction) have been reported. A key caution: spirulina quality varies widely, and some products contain heavy metals or harmful toxins.
An important note about its pregnancy and breastfeeding safety: we have no data on file—talk to your pharmacist or doctor for guidance.
Meds to double-check
Major interaction found
Before taking this product, check if you take any retinoid medications (isotretinoin, tretinoin, adapalene, or others)—this is a Major interaction. Also double-check blood thinners like warfarin, tetracycline antibiotics, drugs that suppress your immune system, diabetes medications, and any others that stress your liver.
The interaction checker on this page can tell you whether yours are affected.
The bottom line
Scorecard at a glanceFully disclosed formula with strong clinical evidence behind its ingredients' uses. Major medication interactions have been identified, and safety information is well characterized.
This product is worth considering if you're deficient in vitamin A or interested in spirulina's possible benefits for blood pressure. But don't start it if you take retinoid medications, blood thinners, tetracycline antibiotics, immunosuppressants, or diabetes drugs—check your exact medications with the tool below first.
Because vitamin A can build up to toxic levels, stick to recommended doses and ask your pharmacist if you're pregnant, breastfeeding, or have liver disease.
Educational only — not medical advice; always confirm with your pharmacist. Our editorial policy · How we use AI
Assessment coverage: 2 of 2 active ingredients matched to our full ingredient reviews (monographs). Based on the product label dated Dec 22, 2017.
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 Spirulina Powder, straight from the product label.
| Brand | Puritan's Pride |
|---|---|
| Barcode (UPC) | 074312151934 |
| Net contents | 4 Oz(s); 113 Gram(s) |
| Market status | On market |
| Date entered into DSLD | Dec 22, 2017 |
| DSLD ID | 82050 |
| Product type | Botanical With Nutrients |
| Supplement form | Powder |
| Dietary claims / uses | All Other, Structure/Function |
| Intended target group(s) | Adult (18 - 50 Years), Gluten Free, Dairy Free, Sugar 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 Spirulina Powder by Puritan's Pride, sourced from the NIH Dietary Supplement Label Database.
Supplement Facts
| Ingredient | Amount | % DV |
|---|---|---|
| Calories | 25 Calorie(s) | -- |
| Total Carbohydrates | 2 Gram(s) | 1% |
| Protein | 4 Gram(s) | 8% |
| Vitamin A | 8225 IU | 165% |
| Spirulina powder | 7000 mg | -- |
Other ingredients: Spirulina powder
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.
General Statements
Naturally occurring amino acids, fatty acids, vitamins & minerals
To reorder item # 5193
Our state-of-the-art manufacturing and packaging facilities insure you the highest quality nutritional supplements money can buy. When it comes to your health...choose the best.
FDA Statement of Identity
Dietary Supplement
Suggested/Recommended/Usage/Directions
Directions: For adults, stir one (1) tablespoon (7 g) of powder into 8 ounces of cold water or your favorite beverage.
Brand IP Statement(s)
Puritan's Pride Premium supplements are produced from the finest raw materials under our stringent quality control standards.
2015 Puritan's Pride, Inc.
Precautions
Warning: If you are pregnant, nursing, taking any medications or have any medical condition, consult your doctor before use.
Discontinue use and consult your doctor if any adverse reactions occur.
Keep out of reach of children.
Do not use if seal under cap is broken or missing.
Storage
Store at room temperature.
Formulation
No artificial color, flavor or sweetener, no preservatives, no sugar, no starch, no milk, no lactose, no soy, no gluten, no wheat, no yeast, no fish. Sodium free.
General
Item # 5193 B67107 08G
Seals/Symbols
QA Quality Assured
Is this label outdated? Report a formula or label change and our pharmacy team will review it.
Spirulina Powder by Puritan's Pride 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 Spirulina Powder by Puritan's Pride
These are the 3 active ingredients this product is made of. Select any to open its full monograph.
Serving size1 Tbsp Dosage formPowder Servings per container16 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.
Protein
Vitamin A
Interacts with387 drugs
Vitamin A is an essential nutrient important for vision, skin, immune function, and growth. Most people get enough from a balanced diet, and supplemen...
Vitamin A monograph & interactionsSpirulina powder
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 powder monograph & interactionsOther (inactive) ingredients: Spirulina powder. These complete the product’s ingredient list but are not active constituents.
Spirulina Powder by Puritan's Pride Drug Interactions
HelloPharmacist Interaction Report
Spirulina Powder by Puritan's Pride contains vitamin A and spirulina powder, both of which interact with medications.
Vitamin A's most serious interaction is with retinoids (a class of vitamin A–derived prescription drugs used for skin conditions and other purposes): taking them together can cause dangerously high vitamin A levels and additive toxicity. This is a Major severity interaction.
Read the full breakdown — every affected drug type, severity by severity
Vitamin A also carries Moderate interactions with blood thinners like warfarin (a bleeding risk if doses are high), tetracycline antibiotics (a risk of increased brain pressure), and other drugs that stress the liver. Spirulina powder interacts at Moderate severity with anticoagulants and antiplatelets (blood thinners and anti-clotting drugs), immunosuppressants (drugs that weaken the immune system), and antidiabetes medications (a risk of low blood sugar).
Altogether, these interactions span 644 individual medications. Use the medication checker on this page to see if any of your prescriptions are affected before you start this product.
Check your own medications below · Editorial policy · How we use AI
Want to check YOUR meds against Spirulina Powder?
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 Spirulina Powder interact with 662 drugs. Click any drug to see the details.
2 of the 3 ingredients in Spirulina Powder interact with drugs. Each result below shows which ingredient is responsible. Vitamin A Spirulina powder
AcitretinSoriatane
How Acitretin interacts with Spirulina Powder — through 1 ingredient. Tap an ingredient for the detail:
Vitamin ARetinoids Major
Interaction Summary
Concomitant use of retinoids with vitamin A supplements might produce supratherapeutic vitamin A levels.
Read the full Vitamin A + Acitretin interactionAlitretinoinPanretin
How Alitretinoin interacts with Spirulina Powder — through 1 ingredient. Tap an ingredient for the detail:
Vitamin ARetinoids Major
Interaction Summary
Concomitant use of retinoids with vitamin A supplements might produce supratherapeutic vitamin A levels.
Read the full Vitamin A + Alitretinoin interactionBexaroteneTargretin
How Bexarotene interacts with Spirulina Powder — through 1 ingredient. Tap an ingredient for the detail:
Vitamin ARetinoids Major
Interaction Summary
Concomitant use of retinoids with vitamin A supplements might produce supratherapeutic vitamin A levels.
Read the full Vitamin A + Bexarotene interactionHalobetasol Propionate,tazaroteneDuobrii
How Halobetasol Propionate,tazarotene interacts with Spirulina Powder — through 1 ingredient. Tap an ingredient for the detail:
Vitamin ARetinoids Major
Interaction Summary
Concomitant use of retinoids with vitamin A supplements might produce supratherapeutic vitamin A levels.
Read the full Vitamin A + Halobetasol Propionate,tazarotene interactionIsotretinoinAbsorica, Accutane, Amnesteem, Claravis, Roaccutane, Sotret
How Isotretinoin interacts with Spirulina Powder — through 1 ingredient. Tap an ingredient for the detail:
Vitamin ARetinoids Major
Interaction Summary
Concomitant use of retinoids with vitamin A supplements might produce supratherapeutic vitamin A levels.
Read the full Vitamin A + Isotretinoin interactionTazaroteneArazlo, Avage, Fabior, Tazorotene, Zorac
How Tazarotene interacts with Spirulina Powder — through 1 ingredient. Tap an ingredient for the detail:
Vitamin ARetinoids Major
Interaction Summary
Concomitant use of retinoids with vitamin A supplements might produce supratherapeutic vitamin A levels.
Read the full Vitamin A + Tazarotene interactionTretinoinAltreno, Renova, Retin-A, Vesanoid
How Tretinoin interacts with Spirulina Powder — through 1 ingredient. Tap an ingredient for the detail:
Vitamin ARetinoids Major
Interaction Summary
Concomitant use of retinoids with vitamin A supplements might produce supratherapeutic vitamin A levels.
Read the full Vitamin A + Tretinoin interactionTretinoin, Benzoyl PeroxideTwyneo
How Tretinoin, Benzoyl Peroxide interacts with Spirulina Powder — through 1 ingredient. Tap an ingredient for the detail:
Vitamin ARetinoids Major
Interaction Summary
Concomitant use of retinoids with vitamin A supplements might produce supratherapeutic vitamin A levels.
Read the full Vitamin A + Tretinoin, Benzoyl Peroxide interactionEtretinateTegison
How Etretinate interacts with Spirulina Powder — through 1 ingredient. Tap an ingredient for the detail:
Vitamin ARetinoids Major
Interaction Summary
Concomitant use of retinoids with vitamin A supplements might produce supratherapeutic vitamin A levels.
Read the full Vitamin A + Etretinate interaction6-mercaptopurinePurinethol
How 6-mercaptopurine interacts with Spirulina Powder — through 2 ingredients. Tap an ingredient for the detail:
Vitamin AHepatotoxic Drugs Moderate
Interaction Summary
Theoretically, taking high doses of vitamin A in combination with other potentially hepatotoxic drugs might increase the risk of liver disease.
Read the full Vitamin A + 6-mercaptopurine interactionSpirulina PowderImmunosuppressants Moderate
Interaction Summary
Theoretically, concurrent use of blue-green algae might interfere with immunosuppressive therapy.
Read the full Spirulina Powder + 6-mercaptopurine interactionAbacavir Sulfate, Dolutegravir, LamivudineTriumeq
How Abacavir Sulfate, Dolutegravir, Lamivudine interacts with Spirulina Powder — through 1 ingredient. Tap an ingredient for the detail:
Vitamin AHepatotoxic Drugs Moderate
Interaction Summary
Theoretically, taking high doses of vitamin A in combination with other potentially hepatotoxic drugs might increase the risk of liver disease.
Read the full Vitamin A + Abacavir Sulfate, Dolutegravir, Lamivudine interactionAbacavir, LamivudineEpzicom
How Abacavir, Lamivudine interacts with Spirulina Powder — through 1 ingredient. Tap an ingredient for the detail:
Vitamin AHepatotoxic Drugs Moderate
Interaction Summary
Theoretically, taking high doses of vitamin A in combination with other potentially hepatotoxic drugs might increase the risk of liver disease.
Read the full Vitamin A + Abacavir, Lamivudine interactionAbciximabReoPro
How Abciximab interacts with Spirulina Powder — through 1 ingredient. Tap an ingredient for the detail:
Spirulina PowderAnticoagulant/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 Powder + Abciximab interactionAbiraterone
How Abiraterone interacts with Spirulina Powder — through 1 ingredient. Tap an ingredient for the detail:
Vitamin AHepatotoxic Drugs Moderate
Interaction Summary
Theoretically, taking high doses of vitamin A in combination with other potentially hepatotoxic drugs might increase the risk of liver disease.
Read the full Vitamin A + Abiraterone interactionAbiraterone AcetateYonsa, Zytiga
How Abiraterone Acetate interacts with Spirulina Powder — through 1 ingredient. Tap an ingredient for the detail:
Vitamin AHepatotoxic Drugs Moderate
Interaction Summary
Theoretically, taking high doses of vitamin A in combination with other potentially hepatotoxic drugs might increase the risk of liver disease.
Read the full Vitamin A + Abiraterone Acetate interactionAbrocitinibCibinqo
How Abrocitinib interacts with Spirulina Powder — through 1 ingredient. Tap an ingredient for the detail:
Spirulina PowderAnticoagulant/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 Powder + Abrocitinib interactionAcarboseGlucobay, Prandase, Precose
How Acarbose interacts with Spirulina Powder — through 2 ingredients. Tap an ingredient for the detail:
Spirulina PowderAntidiabetes Drugs Moderate
Interaction Summary
Theoretically, taking blue-green algae with antidiabetes drugs might increase the risk of hypoglycemia.
Read the full Spirulina Powder + Acarbose interactionVitamin AHepatotoxic Drugs Moderate
Interaction Summary
Theoretically, taking high doses of vitamin A in combination with other potentially hepatotoxic drugs might increase the risk of liver disease.
Read the full Vitamin A + Acarbose interactionAcebutololRhotral, Sectral
How Acebutolol interacts with Spirulina Powder — through 1 ingredient. Tap an ingredient for the detail:
Vitamin AHepatotoxic Drugs Moderate
Interaction Summary
Theoretically, taking high doses of vitamin A in combination with other potentially hepatotoxic drugs might increase the risk of liver disease.
Read the full Vitamin A + Acebutolol interactionAcenocoumarolSintrom
How Acenocoumarol interacts with Spirulina Powder — through 1 ingredient. Tap an ingredient for the detail:
Spirulina PowderAnticoagulant/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 Powder + Acenocoumarol interactionAcetaminophenChildren's Tylenol, Children's Tylenol Meltaways, Tylenol, Tylenol Ex Strength
How Acetaminophen interacts with Spirulina Powder — through 1 ingredient. Tap an ingredient for the detail:
Vitamin AHepatotoxic Drugs Moderate
Interaction Summary
Theoretically, taking high doses of vitamin A in combination with other potentially hepatotoxic drugs might increase the risk of liver disease.
Read the full Vitamin A + Acetaminophen interactionAcetaminophen, AspirinGemnisyn
How Acetaminophen, Aspirin interacts with Spirulina Powder — through 2 ingredients. Tap an ingredient for the detail:
Vitamin AHepatotoxic Drugs Moderate
Interaction Summary
Theoretically, taking high doses of vitamin A in combination with other potentially hepatotoxic drugs might increase the risk of liver disease.
Read the full Vitamin A + Acetaminophen, Aspirin interactionSpirulina PowderAnticoagulant/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 Powder + Acetaminophen, Aspirin interactionAcetaminophen, Aspirin, CaffeineExcedrin, Excedrin Extra Strength, Excedrin Migraine
How Acetaminophen, Aspirin, Caffeine interacts with Spirulina Powder — through 2 ingredients. Tap an ingredient for the detail:
Spirulina PowderAnticoagulant/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 Powder + Acetaminophen, Aspirin, Caffeine interactionVitamin AHepatotoxic Drugs Moderate
Interaction Summary
Theoretically, taking high doses of vitamin A in combination with other potentially hepatotoxic drugs might increase the risk of liver disease.
Read the full Vitamin A + Acetaminophen, Aspirin, Caffeine interactionAcetaminophen, Brompheniramine, PhenylpropanolamineDimetapp Cold and Flu
How Acetaminophen, Brompheniramine, Phenylpropanolamine interacts with Spirulina Powder — through 1 ingredient. Tap an ingredient for the detail:
Vitamin AHepatotoxic Drugs Moderate
Interaction Summary
Theoretically, taking high doses of vitamin A in combination with other potentially hepatotoxic drugs might increase the risk of liver disease.
Read the full Vitamin A + Acetaminophen, Brompheniramine, Phenylpropanolamine interactionAcetaminophen, ButalbitalAxocet, Bancap, Bucet, Butex Forte, Esgic CF, Orbivan CF +5 more
How Acetaminophen, Butalbital interacts with Spirulina Powder — through 1 ingredient. Tap an ingredient for the detail:
Vitamin AHepatotoxic Drugs Moderate
Interaction Summary
Theoretically, taking high doses of vitamin A in combination with other potentially hepatotoxic drugs might increase the risk of liver disease.
Read the full Vitamin A + Acetaminophen, Butalbital interactionAcetaminophen, Butalbital, CaffeineEsgic, Esgic Plus, Fiogesic, Fioricet, Repan, Tecnal +1 more
How Acetaminophen, Butalbital, Caffeine interacts with Spirulina Powder — through 1 ingredient. Tap an ingredient for the detail:
Vitamin AHepatotoxic Drugs Moderate
Interaction Summary
Theoretically, taking high doses of vitamin A in combination with other potentially hepatotoxic drugs might increase the risk of liver disease.
Read the full Vitamin A + Acetaminophen, Butalbital, Caffeine interactionAcetaminophen, Butalbital, Caffeine, CodeineEsgic with Codeine, Fioricet w/ Codeine
How Acetaminophen, Butalbital, Caffeine, Codeine interacts with Spirulina Powder — through 1 ingredient. Tap an ingredient for the detail:
Vitamin AHepatotoxic Drugs Moderate
Interaction Summary
Theoretically, taking high doses of vitamin A in combination with other potentially hepatotoxic drugs might increase the risk of liver disease.
Read the full Vitamin A + Acetaminophen, Butalbital, Caffeine, Codeine interactionAcetaminophen, Butalbital, CodeineBancap w/ Codeine
How Acetaminophen, Butalbital, Codeine interacts with Spirulina Powder — through 1 ingredient. Tap an ingredient for the detail:
Vitamin AHepatotoxic Drugs Moderate
Interaction Summary
Theoretically, taking high doses of vitamin A in combination with other potentially hepatotoxic drugs might increase the risk of liver disease.
Read the full Vitamin A + Acetaminophen, Butalbital, Codeine interactionAcetaminophen, Butalbital, Codeine PhosphatePhrenilin #3
How Acetaminophen, Butalbital, Codeine Phosphate interacts with Spirulina Powder — through 1 ingredient. Tap an ingredient for the detail:
Vitamin AHepatotoxic Drugs Moderate
Interaction Summary
Theoretically, taking high doses of vitamin A in combination with other potentially hepatotoxic drugs might increase the risk of liver disease.
Read the full Vitamin A + Acetaminophen, Butalbital, Codeine Phosphate interactionAcetaminophen, Caffeine, Chlorpheniramine, Hydrocodone, PhenylephrineHycomine Compound
How Acetaminophen, Caffeine, Chlorpheniramine, Hydrocodone, Phenylephrine interacts with Spirulina Powder — through 1 ingredient. Tap an ingredient for the detail:
Vitamin AHepatotoxic Drugs Moderate
Interaction Summary
Theoretically, taking high doses of vitamin A in combination with other potentially hepatotoxic drugs might increase the risk of liver disease.
Read the full Vitamin A + Acetaminophen, Caffeine, Chlorpheniramine, Hydrocodone, Phenylephrine interactionAcetaminophen, Caffeine, CodeineGesic C15, Gesic C30, Gesic C8, Lenoltec 1, Lenoltec 2, Lenoltec 3 +1 more
How Acetaminophen, Caffeine, Codeine interacts with Spirulina Powder — through 1 ingredient. Tap an ingredient for the detail:
Vitamin AHepatotoxic Drugs Moderate
Interaction Summary
Theoretically, taking high doses of vitamin A in combination with other potentially hepatotoxic drugs might increase the risk of liver disease.
Read the full Vitamin A + Acetaminophen, Caffeine, Codeine interactionEach ingredient & the kinds of drugs it affects
For each ingredient in Spirulina Powder 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.
Vitamin A
Retinoids
Concomitant use of retinoids with vitamin A supplements might produce supratherapeutic vitamin A levels.
Retinoids, which are vitamin A derivatives, could have additive toxic effects when taken with vitamin A supplements.
Hepatotoxic Drugs
Theoretically, taking high doses of vitamin A in combination with other potentially hepatotoxic drugs might increase the risk of liver disease.
The tolerable upper intake level (UL) is the highest level of intake that is likely to pose no risk of adverse effects. Doses of vitamin A above the UL can cause hepatotoxicity, ranging from elevated liver enzymes to liver failure.
Tetracycline Antibiotics
Theoretically, taking tetracycline antibiotics with high doses of vitamin A can increase the risk of pseudotumor cerebri.
Benign intracranial hypertension (pseudotumor cerebri) can occur with tetracyclines and with acute or chronic vitamin A toxicity. Case reports suggest that taking tetracyclines and vitamin A concurrently can increase the risk of this condition. Avoid high doses of vitamin A in people taking tetracyclines chronically.
Warfarin (Coumadin)
Theoretically, high doses of vitamin A could increase the risk of bleeding with warfarin.
Vitamin A toxicity is associated with hemorrhage and hypoprothrombinemia, possibly due to vitamin K antagonism. Advise patients taking warfarin to avoid doses of vitamin A above the tolerable upper intake level of 10,000 IU/day for adults.
Spirulina powder
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 Spirulina Powder, from the product label.
Puritan's Pride
See all Puritan's Pride products- Name
- Puritan's Pride, Inc.
- City
- Holbrook
- State
- NY
- ZipCode
- 11741
- Phone Number
- 1-800-645-1030
- Web Address
- www.puritan.com
Spirulina Powder by Puritan's Pride: Common Questions
Does Spirulina Powder by Puritan's Pride interact with any medications?
How can one product interact with so many drugs?
Where does this information come from?
Is vitamin A in this product safe during pregnancy?
What are the most common side effects of spirulina?
Can I take this if I have high blood pressure?
Does this product have fillers or other ingredients I should know about?
Why does the product facts show such a large number of interacting medications?
Is spirulina safe if it's contaminated?
Written and reviewed by the HelloPharmacist editorial staff. Our editorial policy
Not sure if Spirulina Powder 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 Spirulina Powder’s Ingredients
Every ingredient we hold a full HelloPharmacist monograph for — uses, evidence, safety, and the complete interaction list.
Vitamin A
Interacts with 387 drugsVitamin A is an essential nutrient important for vision, skin, immune function, and growth. Most people get enough from a balanced diet, and supplements are mainly useful for correcting a tr...
Read the full Vitamin A 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
Spirulina Powder'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 53 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.
Vitamin A 31 references
- McEvoy GK, ed. AHFS Drug Information. Bethesda, MD: American Society of Health-System Pharmacists, 1998.
- Griffiths JK. The vitamin A paradox. J Pediatr 2000;137:604-7.. PubMed
- Hardman JG, Limbird LL, Molinoff PB, eds. Goodman and Gillman's The Pharmacological Basis of Therapeutics, 9th ed. New York, NY: McGraw-Hill, 1996.
- Hansten PD, Horn JR. Drug Interactions Analysis and Management. Vancouver, WA: Applied Therapeutics Inc., 1997 and updates.
- FDA Talk Paper. Vitamin A and birth defects (T95-56). Food and Drug Administration, U.S. Department of Health and Human Services, Rockville, MD. October 6, 1995.
- Russell RM. The vitamin A spectrum: from deficiency to toxicity. Am J Clin Nutr 2000;71:878-84. PubMed
- Food and Nutrition Board, Institute of Medicine. Dietary Reference Intakes for Vitamin A, Vitamin K, Arsenic, Boron, Chromium, Copper, Iodine, Iron, Manganese, Molybdenum, Nickel, Silicon, Vanadium, and Zinc. Washington, DC: National Academy Press, 2002.
- Feskanich D, Singh V, Willett WC, Colditz GA. Vitamin A intake and hip fractures among postmenopausal women. JAMA 2002;287:47-54. PubMed
- Melhus H, Michaelsson K, Kindmark A, et al. Excessive dietary intake of vitamin A is associated with reduced bone mineral density and increased risk for hip fracture. Ann Intern Med 1998;129:770-8. PubMed
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