Folate 1,333 mcg DFE (800 mcg Folic Acid) Ingredients & Drug Interactions
by Country Life
What is this page for?
First and foremost: checking Folate 1,333 mcg DFE (800 mcg Folic Acid) 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
Folate 1,333 mcg DFE (800 mcg Folic Acid) is a dietary supplement by Country Life with 1 active ingredient. Its ingredients are commonly taken for preventing neural tube birth defects, treating or preventing folate deficiency, supporting pregnancy health.Based on those ingredients, 40 medications have a known interaction with it, the most serious rated moderate. The ingredients most likely to interact are Folic Acid. Use the checker below to test your specific medication, or read the full HelloPharmacist Interaction Report.
Check Your Meds Against Folate 1,333 mcg DFE (800 mcg Folic Acid) by Country Life
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HelloPharmacist Scorecard of Folate 1,333 mcg DFE (800 mcg Folic Acid) by Country Life
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 product contains one active ingredient: folic acid, supplying 800 mcg of folic acid (1,333 mcg DFE — dietary folate equivalent, which is how folate potency is measured). The tablet also contains inactive ingredients: cellulose, stearic acid, silica, and magnesium stearate, which are common fillers and binders.
Does it work?
Strong evidence
Folic acid in this dose is effective for treating folate deficiency and likely effective for preventing neural tube birth defects (like spina bifida) and reducing methotrexate toxicity. There is also possibly effective evidence for depression, phenytoin-induced gingival hyperplasia (a gum condition), and cognitive impairment, though the evidence for these uses is less established.
How safe is it?
Well-documented data
Folic acid is generally well tolerated at recommended doses for most adults, and it's considered safe at normal recommended doses while breastfeeding. It's also recommended during pregnancy at standard prenatal doses to help prevent birth defects.
That said, at higher doses — 5 mg daily or more — you may experience abdominal cramps, diarrhea, rash, or at 15 mg daily, bitter taste, confusion, nausea, and sleep disturbances. Serious adverse effects (cancer with long-term use, liver injury, seizures) are rare.
One important caution: folic acid can mask pernicious anemia (a vitamin B12 deficiency), so don't self-treat suspected anemia without a diagnosis first.
Meds to double-check
Moderate interaction found
Before you take this, double-check with your pharmacist if you're on seizure medications (phenytoin, phenobarbital, primidone), cancer drugs (methotrexate, capecitabine, 5-fluorouracil), or pyrimethamine — all are Moderate-severity interactions with folic acid.
The bottom line
Scorecard at a glanceFully disclosed formula with clinical evidence supporting its stated purpose. Moderate medication interactions have been identified, and safety information is well characterized.
This supplement works well for folate deficiency and is safe for most people at the recommended dose. If you take seizure medications, cancer drugs, or pyrimethamine, check with your pharmacist before starting.
Don't use it to self-treat anemia — get a diagnosis first so you're not masking a B12 problem.
Educational only — not medical advice; always confirm with your pharmacist. Our editorial policy · How we use AI
Assessment coverage: 1 of 1 active ingredient matched to our full ingredient reviews (monographs). Based on the product label dated Aug 22, 2025.
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 Folate 1,333 mcg DFE (800 mcg Folic Acid), straight from the product label.
| Brand | Country Life |
|---|---|
| Barcode (UPC) | 015794065210 |
| Net contents | 100 Tablet(s) |
| Market status | On market |
| Date entered into DSLD | Aug 22, 2025 |
| DSLD ID | 333189 |
| Product type | Vitamin |
| Supplement form | Tablet Or Pill |
| Dietary claims / uses | Nutrient, All Other, Structure/Function |
| Intended target group(s) | Vegan, Vegetarian, Adult (18 - 50 Years), Kosher, Pregnant Women, Halal |
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 Folate 1,333 mcg DFE (800 mcg Folic Acid) by Country Life, sourced from the NIH Dietary Supplement Label Database.
Supplement Facts
| Ingredient | Amount | % DV |
|---|---|---|
| Folic Acid | 800 mcg | -- |
| Folate | 1333 mcg DFE | 333% |
Other ingredients: Cellulose, Stearic Acid, Silica, 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.
Formula
Folic Acid is an essential B Vitamin required for cell division and the healthy development of red blood cells. Women who consume healthful diets with adequate folate may reduce their risk of having a child with birth defects of the brain or spinal cord.
Yes Kosher-Parve
Yes Certified Halal by IFANCA
Precautions
Folate intake should not exceed 1,000 mcg folic acid daily.
Do not exceed recommended dose.
As a reminder, discuss the supplements and medications that you take with your health care providers. Caution: If you are pregnant, nursing, or taking medication, have a medical condition or planning surgery, consult a doctor before using this product.
Stop using and consult a doctor if any adverse reactions occur. Do not accept if seal is broken.
Keep out of the reach of children.
FDA Disclaimer Statement
These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure or prevent any disease.
Formulation
Yes certified gluten-free by GFCO.Org No yeast, wheat or corn No soy, milk, or salt No sugar or preservatives No artificial colors No artificial flavors No artificial sweeteners No GMOs
Yes certified Vegan by the AVA
Yes manufacturing supports wind power
Certified gluten-free
Essential for expectant mothers Promotes healthy cell development Supports cardiovascular health Our Pledge of Integrity Authenticity Cleanliness Freshness Consistency Accuracy
This product has been manufactured at a GMP registered facility.
General Statements
Yes recyclable packaging
Seals/Symbols
IFANCA Certified Crescent M Halal KOF-K Parve (Kosher) Certified B Corporation Certified GF Gluten-free
Brand IP Statement(s)
Country Life Established 1971
FDA Statement of Identity
Dietary Supplement
Suggested/Recommended/Usage/Directions
Directions: Adults take one (1) tablet daily with food.
Storage
Store between 59 degrees - 86 degrees F.
Is this label outdated? Report a formula or label change and our pharmacy team will review it.
Folate 1,333 mcg DFE (800 mcg Folic Acid) by Country Life 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 Folate 1,333 mcg DFE (800 mcg Folic Acid) by Country Life
This is the 1 active ingredient this product is made of. Select it to open its full monograph.
Serving size1 Tablet(s) Dosage formTablet Or Pill Servings per container100 Amounts shown are per serving.
Folate
Other (inactive) ingredients: Cellulose, Stearic Acid, Silica, Magnesium Stearate. These complete the product’s ingredient list but are not active constituents.
Folate 1,333 mcg DFE (800 mcg Folic Acid) by Country Life Drug Interactions
HelloPharmacist Interaction Report
Country Life's Folate supplement contains folic acid, which does interact with several medications.
The most serious concern is with seizure-control drugs: folic acid can reduce how well phenytoin (Dilantin) and primidone (Mysoline) work, and it may actually trigger seizures in some people taking phenobarbital (Luminal). All three are Moderate-severity interactions — if you take any seizure medication, don't start folic acid without checking with your doctor or pharmacist first.
Read the full breakdown — every affected drug type, severity by severity
Folic acid also interacts with cancer medications. It can reduce the effectiveness of methotrexate when used as cancer treatment, and high-dose folic acid may increase toxicity from capecitabine (Xeloda) and 5-fluorouracil.
It can antagonize pyrimethamine (Daraprim), an antiparasitic drug — though it doesn't affect pyrimethamine when it's used for malaria. All of these are Moderate-severity interactions.
Additionally, if you don't take any of these drugs, use the medication checker below to verify your exact prescriptions before you start.
Check your own medications below · Editorial policy · How we use AI
Want to check YOUR meds against Folate 1,333 mcg DFE (800 mcg Folic Acid)?
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 Folate 1,333 mcg DFE (800 mcg Folic Acid) interact with 40 drugs. Click any drug to see the details.
1 of the 1 ingredient in Folate 1,333 mcg DFE (800 mcg Folic Acid) interact with drugs. Each result below shows which ingredient is responsible. Folic Acid
Aprobarbital, Butabarbital, PhenobarbitalTriple Barbital
How Aprobarbital, Butabarbital, Phenobarbital interacts with Folate 1,333 mcg DFE (800 mcg Folic Acid) — through 1 ingredient. Tap an ingredient for the detail:
Folic AcidPhenobarbital (luminal) Moderate
Interaction Summary
Folic acid might have antagonistic effects on phenobarbital and increase the risk for seizures.
Read the full Folic Acid + Aprobarbital, Butabarbital, Phenobarbital interactionAspirin, Codeine Phosphate, PhenobarbitalPhenaphen
How Aspirin, Codeine Phosphate, Phenobarbital interacts with Folate 1,333 mcg DFE (800 mcg Folic Acid) — through 1 ingredient. Tap an ingredient for the detail:
Folic AcidPhenobarbital (luminal) Moderate
Interaction Summary
Folic acid might have antagonistic effects on phenobarbital and increase the risk for seizures.
Read the full Folic Acid + Aspirin, Codeine Phosphate, Phenobarbital interactionAtropine, Hyoscyamine, PhenobarbitalHypnaldyne
How Atropine, Hyoscyamine, Phenobarbital interacts with Folate 1,333 mcg DFE (800 mcg Folic Acid) — through 1 ingredient. Tap an ingredient for the detail:
Folic AcidPhenobarbital (luminal) Moderate
Interaction Summary
Folic acid might have antagonistic effects on phenobarbital and increase the risk for seizures.
Read the full Folic Acid + Atropine, Hyoscyamine, Phenobarbital interactionAtropine, Hyoscyamine, Phenobarbital, ScopolamineBarbidonna No. 2, Belladonna Phenobarbital
How Atropine, Hyoscyamine, Phenobarbital, Scopolamine interacts with Folate 1,333 mcg DFE (800 mcg Folic Acid) — through 1 ingredient. Tap an ingredient for the detail:
Folic AcidPhenobarbital (luminal) Moderate
Interaction Summary
Folic acid might have antagonistic effects on phenobarbital and increase the risk for seizures.
Read the full Folic Acid + Atropine, Hyoscyamine, Phenobarbital, Scopolamine interactionAtropine, Hyoscyamine, Scopolamine, PhenobarbitalBarbeloid, Donnatal #2, Donphen
How Atropine, Hyoscyamine, Scopolamine, Phenobarbital interacts with Folate 1,333 mcg DFE (800 mcg Folic Acid) — through 1 ingredient. Tap an ingredient for the detail:
Folic AcidPhenobarbital (luminal) Moderate
Interaction Summary
Folic acid might have antagonistic effects on phenobarbital and increase the risk for seizures.
Read the full Folic Acid + Atropine, Hyoscyamine, Scopolamine, Phenobarbital interactionAtropine, PhenobarbitalAnthrocol
How Atropine, Phenobarbital interacts with Folate 1,333 mcg DFE (800 mcg Folic Acid) — through 1 ingredient. Tap an ingredient for the detail:
Folic AcidPhenobarbital (luminal) Moderate
Interaction Summary
Folic acid might have antagonistic effects on phenobarbital and increase the risk for seizures.
Read the full Folic Acid + Atropine, Phenobarbital interactionBelladona Extract, PhenobarbitalChardonna-2
How Belladona Extract, Phenobarbital interacts with Folate 1,333 mcg DFE (800 mcg Folic Acid) — through 1 ingredient. Tap an ingredient for the detail:
Folic AcidPhenobarbital (luminal) Moderate
Interaction Summary
Folic acid might have antagonistic effects on phenobarbital and increase the risk for seizures.
Read the full Folic Acid + Belladona Extract, Phenobarbital interactionBelladonna Alkaloids, Ergotamine Tartrate, PhenobarbitalBel Tabs, Bellamine-S, Bellaphen-S, Duragal S, Phenarbal S, Spastrin
How Belladonna Alkaloids, Ergotamine Tartrate, Phenobarbital interacts with Folate 1,333 mcg DFE (800 mcg Folic Acid) — through 1 ingredient. Tap an ingredient for the detail:
Folic AcidPhenobarbital (luminal) Moderate
Interaction Summary
Folic acid might have antagonistic effects on phenobarbital and increase the risk for seizures.
Read the full Folic Acid + Belladonna Alkaloids, Ergotamine Tartrate, Phenobarbital interactionBelladonna Alkaloids, PhenobarbitalBarbidonna, Donnatal
How Belladonna Alkaloids, Phenobarbital interacts with Folate 1,333 mcg DFE (800 mcg Folic Acid) — through 1 ingredient. Tap an ingredient for the detail:
Folic AcidPhenobarbital (luminal) Moderate
Interaction Summary
Folic acid might have antagonistic effects on phenobarbital and increase the risk for seizures.
Read the full Folic Acid + Belladonna Alkaloids, Phenobarbital interactionBelladonna Extract, PhenobarbitalBelap
How Belladonna Extract, Phenobarbital interacts with Folate 1,333 mcg DFE (800 mcg Folic Acid) — through 1 ingredient. Tap an ingredient for the detail:
Folic AcidPhenobarbital (luminal) Moderate
Interaction Summary
Folic acid might have antagonistic effects on phenobarbital and increase the risk for seizures.
Read the full Folic Acid + Belladonna Extract, Phenobarbital interactionBelladonna, Ergotamine Tartrate, Phenobarbital
How Belladonna, Ergotamine Tartrate, Phenobarbital interacts with Folate 1,333 mcg DFE (800 mcg Folic Acid) — through 1 ingredient. Tap an ingredient for the detail:
Folic AcidPhenobarbital (luminal) Moderate
Interaction Summary
Folic acid might have antagonistic effects on phenobarbital and increase the risk for seizures.
Read the full Folic Acid + Belladonna, Ergotamine Tartrate, Phenobarbital interactionBelladonna, Ergotamine, PhenobarbitalBellergal-S
How Belladonna, Ergotamine, Phenobarbital interacts with Folate 1,333 mcg DFE (800 mcg Folic Acid) — through 1 ingredient. Tap an ingredient for the detail:
Folic AcidPhenobarbital (luminal) Moderate
Interaction Summary
Folic acid might have antagonistic effects on phenobarbital and increase the risk for seizures.
Read the full Folic Acid + Belladonna, Ergotamine, Phenobarbital interactionBelladonna, PhenobarbitalBellophen, Susano
How Belladonna, Phenobarbital interacts with Folate 1,333 mcg DFE (800 mcg Folic Acid) — through 1 ingredient. Tap an ingredient for the detail:
Folic AcidPhenobarbital (luminal) Moderate
Interaction Summary
Folic acid might have antagonistic effects on phenobarbital and increase the risk for seizures.
Read the full Folic Acid + Belladonna, Phenobarbital interactionBellafoline, PhenobarbitalBelladenal, Belladenal-S
How Bellafoline, Phenobarbital interacts with Folate 1,333 mcg DFE (800 mcg Folic Acid) — through 1 ingredient. Tap an ingredient for the detail:
Folic AcidPhenobarbital (luminal) Moderate
Interaction Summary
Folic acid might have antagonistic effects on phenobarbital and increase the risk for seizures.
Read the full Folic Acid + Bellafoline, Phenobarbital interactionButabarbital, Phenobarbital, SecobarbitalS.B.P.
How Butabarbital, Phenobarbital, Secobarbital interacts with Folate 1,333 mcg DFE (800 mcg Folic Acid) — through 1 ingredient. Tap an ingredient for the detail:
Folic AcidPhenobarbital (luminal) Moderate
Interaction Summary
Folic acid might have antagonistic effects on phenobarbital and increase the risk for seizures.
Read the full Folic Acid + Butabarbital, Phenobarbital, Secobarbital interactionButalbital, Phenobarbital, SecobarbitalTribarb
How Butalbital, Phenobarbital, Secobarbital interacts with Folate 1,333 mcg DFE (800 mcg Folic Acid) — through 1 ingredient. Tap an ingredient for the detail:
Folic AcidPhenobarbital (luminal) Moderate
Interaction Summary
Folic acid might have antagonistic effects on phenobarbital and increase the risk for seizures.
Read the full Folic Acid + Butalbital, Phenobarbital, Secobarbital interactionCamphor, Hyoscyamine, Passif, Phenobarbital, Scopolamine, ValerianNevrotose #3
How Camphor, Hyoscyamine, Passif, Phenobarbital, Scopolamine, Valerian interacts with Folate 1,333 mcg DFE (800 mcg Folic Acid) — through 1 ingredient. Tap an ingredient for the detail:
Folic AcidPhenobarbital (luminal) Moderate
Interaction Summary
Folic acid might have antagonistic effects on phenobarbital and increase the risk for seizures.
Read the full Folic Acid + Camphor, Hyoscyamine, Passif, Phenobarbital, Scopolamine, Valerian interactionCapecitabineXeloda
How Capecitabine interacts with Folate 1,333 mcg DFE (800 mcg Folic Acid) — through 1 ingredient. Tap an ingredient for the detail:
Folic AcidCapecitabine (xeloda) Moderate
Interaction Summary
Use of high-dose folic acid might contribute to capecitabine toxicity.
Read the full Folic Acid + Capecitabine interactionDehydrocholic Acid, Homatropine Methylbromide, PhenobarbitalG.B.S.
How Dehydrocholic Acid, Homatropine Methylbromide, Phenobarbital interacts with Folate 1,333 mcg DFE (800 mcg Folic Acid) — through 1 ingredient. Tap an ingredient for the detail:
Folic AcidPhenobarbital (luminal) Moderate
Interaction Summary
Folic acid might have antagonistic effects on phenobarbital and increase the risk for seizures.
Read the full Folic Acid + Dehydrocholic Acid, Homatropine Methylbromide, Phenobarbital interactionDicyclomine, PhenobarbitalBentyl w/ Pb
How Dicyclomine, Phenobarbital interacts with Folate 1,333 mcg DFE (800 mcg Folic Acid) — through 1 ingredient. Tap an ingredient for the detail:
Folic AcidPhenobarbital (luminal) Moderate
Interaction Summary
Folic acid might have antagonistic effects on phenobarbital and increase the risk for seizures.
Read the full Folic Acid + Dicyclomine, Phenobarbital interactionDyphylline, Ephedrine, Guaifenesin, PhenobarbitalLufyllin-EPG
How Dyphylline, Ephedrine, Guaifenesin, Phenobarbital interacts with Folate 1,333 mcg DFE (800 mcg Folic Acid) — through 1 ingredient. Tap an ingredient for the detail:
Folic AcidPhenobarbital (luminal) Moderate
Interaction Summary
Folic acid might have antagonistic effects on phenobarbital and increase the risk for seizures.
Read the full Folic Acid + Dyphylline, Ephedrine, Guaifenesin, Phenobarbital interactionEphedrine, Guaifenesin, Phenobarbital, TheophyllineMudrane GG
How Ephedrine, Guaifenesin, Phenobarbital, Theophylline interacts with Folate 1,333 mcg DFE (800 mcg Folic Acid) — through 1 ingredient. Tap an ingredient for the detail:
Folic AcidPhenobarbital (luminal) Moderate
Interaction Summary
Folic acid might have antagonistic effects on phenobarbital and increase the risk for seizures.
Read the full Folic Acid + Ephedrine, Guaifenesin, Phenobarbital, Theophylline interactionEphedrine, Phenobarbital, Potassium Iodide, TheophyllineMudrane, Quadrinal
How Ephedrine, Phenobarbital, Potassium Iodide, Theophylline interacts with Folate 1,333 mcg DFE (800 mcg Folic Acid) — through 1 ingredient. Tap an ingredient for the detail:
Folic AcidPhenobarbital (luminal) Moderate
Interaction Summary
Folic acid might have antagonistic effects on phenobarbital and increase the risk for seizures.
Read the full Folic Acid + Ephedrine, Phenobarbital, Potassium Iodide, Theophylline interactionEphedrine, Phenobarbital, TheophyllineTedral
How Ephedrine, Phenobarbital, Theophylline interacts with Folate 1,333 mcg DFE (800 mcg Folic Acid) — through 1 ingredient. Tap an ingredient for the detail:
Folic AcidPhenobarbital (luminal) Moderate
Interaction Summary
Folic acid might have antagonistic effects on phenobarbital and increase the risk for seizures.
Read the full Folic Acid + Ephedrine, Phenobarbital, Theophylline interactionErgotamine, Belladonna, PhenobarbitalBellamine, Bellaspas, Eperbel-S
How Ergotamine, Belladonna, Phenobarbital interacts with Folate 1,333 mcg DFE (800 mcg Folic Acid) — through 1 ingredient. Tap an ingredient for the detail:
Folic AcidPhenobarbital (luminal) Moderate
Interaction Summary
Folic acid might have antagonistic effects on phenobarbital and increase the risk for seizures.
Read the full Folic Acid + Ergotamine, Belladonna, Phenobarbital interactionFluorouracilEfudex, Tolak
How Fluorouracil interacts with Folate 1,333 mcg DFE (800 mcg Folic Acid) — through 1 ingredient. Tap an ingredient for the detail:
Folic Acid5-fluorouracil Moderate
Interaction Summary
Theoretically, high doses of folic acid might increase the toxicity of 5-fluorouracil.
Read the full Folic Acid + Fluorouracil interactionFluorouracil (iv)Fluorouracil
How Fluorouracil (iv) interacts with Folate 1,333 mcg DFE (800 mcg Folic Acid) — through 1 ingredient. Tap an ingredient for the detail:
Folic Acid5-fluorouracil Moderate
Interaction Summary
Theoretically, high doses of folic acid might increase the toxicity of 5-fluorouracil.
Read the full Folic Acid + Fluorouracil (iv) interactionFosphenytoinCerebyx
How Fosphenytoin interacts with Folate 1,333 mcg DFE (800 mcg Folic Acid) — through 1 ingredient. Tap an ingredient for the detail:
Folic AcidPhenytoin (dilantin) Moderate
Interaction Summary
Folic acid might reduce serum levels of phenytoin in some patients.
Read the full Folic Acid + Fosphenytoin interactionFosphenytoin SodiumSesquient
How Fosphenytoin Sodium interacts with Folate 1,333 mcg DFE (800 mcg Folic Acid) — through 1 ingredient. Tap an ingredient for the detail:
Folic AcidPhenytoin (dilantin) Moderate
Interaction Summary
Folic acid might reduce serum levels of phenytoin in some patients.
Read the full Folic Acid + Fosphenytoin Sodium interactionHyoscyamine, PhenobarbitalLevsin Pb, Levsinex Pb Timecaps
How Hyoscyamine, Phenobarbital interacts with Folate 1,333 mcg DFE (800 mcg Folic Acid) — through 1 ingredient. Tap an ingredient for the detail:
Folic AcidPhenobarbital (luminal) Moderate
Interaction Summary
Folic acid might have antagonistic effects on phenobarbital and increase the risk for seizures.
Read the full Folic Acid + Hyoscyamine, Phenobarbital interactionEach ingredient & the kinds of drugs it affects
For each ingredient in Folate 1,333 mcg DFE (800 mcg Folic Acid) with known interactions, here are the types of medications it can affect. Open any type for the detail — or search your exact drug in the checker above.
Folic Acid
5-Fluorouracil
Theoretically, high doses of folic acid might increase the toxicity of 5-fluorouracil.
Increases in gastrointestinal side effects of 5-fluorouracil, such as stomatitis and diarrhea, have been described in two clinical studies when leucovorin, a form of folic acid, was administered with 5-fluorouracil.
Capecitabine (Xeloda)
Use of high-dose folic acid might contribute to capecitabine toxicity.
Clinical research suggests that higher serum folate levels are associated with an increased risk for moderate or severe toxicity during capecitabine-based treatment for colorectal cancer. Additionally, in one case report, taking folic acid 15 mg daily might have contributed to increased toxicity, including severe diarrhea, vomiting, edema, hand-foot syndrome, and eventually death, in a patient prescribed capecitabine.
Methotrexate (Trexall, Others)
Folic acid might reduce the efficacy of methotrexate as a cancer treatment when given concurrently.
Methotrexate exerts its cytotoxic effects by preventing conversion of folic acid to the active form needed by cells. There is some evidence that folic acid supplements reduce the efficacy of methotrexate in the treatment of acute lymphoblastic leukemia, and theoretically they could reduce its efficacy in the treatment of other cancers. Advise cancer patients to consult their oncologist before using folic acid supplements. In patients treated with long-term, low-dose methotrexate for rheumatoid arthritis (RA) or psoriasis, folic acid supplements can reduce the incidence of side effects, without reducing efficacy.
Phenobarbital (Luminal)
Folic acid might have antagonistic effects on phenobarbital and increase the risk for seizures.
Folic acid can have direct convulsant activity in some people, reversing the effects of phenobarbital and worsening seizure control. Monitor closely for increased seizure activity.
Phenytoin (Dilantin)
Folic acid might reduce serum levels of phenytoin in some patients.
Folic acid may be a cofactor in phenytoin metabolism. Folic acid, in doses of 1 mg daily or more, can reduce serum levels of phenytoin in some patients. Increases in seizure frequency have been reported. If folic acid supplements are added to established phenytoin therapy, monitor serum phenytoin levels closely. If phenytoin and folic acid are started at the same time and continued together, adverse changes in phenytoin pharmacokinetics are avoided. Note that phenytoin also reduces serum folate levels.
Primidone (Mysoline)
Folic acid might have antagonistic effects on primidone and increase the risk for seizures.
Folic acid can have direct convulsant activity in some people, reversing the effects of primidone and worsening seizure control. Monitor closely for increased seizure activity. Note that primidone also reduces serum folate levels.
Pyrimethamine (Daraprim)
Folic acid might antagonize the effects of pyrimethamine.
Folic acid can antagonize the antiparasitic effects of pyrimethamine against toxoplasmosis and Pneumocystis carinii pneumonia. Folic acid doesn't antagonize the effects of pyrimethamine in the treatment of malaria, because malarial parasites cannot use exogenous folic acid. Use folinic acid as an alternative to folic acid when indicated.
Brand information
Manufacturer and brand details for Folate 1,333 mcg DFE (800 mcg Folic Acid), from the product label.
Country Life
See all Country Life products- Name
- Country Life, LLC
- Street Address
- 180 Vanderbilt Motor Parkway
- City
- Hauppauge
- State
- NY
- ZipCode
- 11788
- Web Address
- CountryLifeVitamins.com
Folate 1,333 mcg DFE (800 mcg Folic Acid) by Country Life: Common Questions
Does Folate 1,333 mcg DFE (800 mcg Folic Acid) by Country Life interact with any medications?
How can one product interact with so many drugs?
Where does this information come from?
Can I take folic acid while I'm pregnant?
Is folic acid safe while breastfeeding?
What side effects should I expect?
Will this help with my depression?
Should I be concerned about taking this long-term?
What's the difference between folic acid and folate?
Written and reviewed by the HelloPharmacist editorial staff. Our editorial policy
Not sure if Folate 1,333 mcg DFE (800 mcg Folic Acid) 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 Folate 1,333 mcg DFE (800 mcg Folic Acid)’s Ingredients
Every ingredient we hold a full HelloPharmacist monograph for — uses, evidence, safety, and the complete interaction list.
Sources & How We Checked
Folate 1,333 mcg DFE (800 mcg Folic Acid)'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 56 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.
Folic Acid 56 references
- McEvoy GK, ed. AHFS Drug Information. Bethesda, MD: American Society of Health-System Pharmacists, 1998.
- Duhra P. Treatment of gastrointestinal symptoms associated with methotrexate therapy for psoriasis. J Am Acad Dermatol 1993;28:466-9. PubMed
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