Folic acid
Folic acid is the synthetic form of folate used in medicines and supplements. It is essential for DNA synthesis and red-blood-cell formation, and adequate intake before conception and in early pregnancy reduces the risk of neural-tube defects.
At a glance
Quick facts
- Drug class
- Folate (vitamin B9) preparation
- Main uses
- Prevention and treatment of folate deficiency; prevention of neural-tube defects around conception and early pregnancy; specific hematologic indications
- Route
- Oral; injectable folate products are uncommon and formulation-dependent
- WHO ATC
- B03BB01
- Key safety
- Generally well tolerated at standard doses; high-dose folic acid can correct anemia while allowing neurologic injury from vitamin B12 deficiency to progress unnoticed.
- Monitoring
- Reason for supplementation, diet, blood count and vitamin B12 status when deficiency anemia is suspected.
Names & terminology
How this medicine may be named or searched
- Canonical page name
- Folic acid
- INN / generic name
- Folic acid
- Aliases / salts
- folic acid · folate · vitamin B9 · pteroylglutamic acid
- Russian support entity
- folic-acid.ru — entity relationship only, not a clinical source
Structured drug profile
Drug profile
What is Folic acid?
Folic acid is the synthetic form of folate used in medicines and supplements. It is essential for DNA synthesis and red-blood-cell formation, and adequate intake before conception and in early pregnancy reduces the risk of neural-tube defects.
What is Folic acid used for?
Prevention and treatment of folate deficiency; prevention of neural-tube defects around conception and early pregnancy; specific hematologic indications. The exact approved indication depends on the product, route and country. [1]
How it works
Provides folate required for one-carbon transfer reactions, DNA synthesis and normal red-blood-cell production.
Forms and formulations
Tablets and supplements; combination prenatal and hematinic products are common. Different formulations may have different indications, strengths, excipients and instructions and should not be assumed interchangeable.
Country / market layer
Availability and formulations by market
Brand names, strengths, prescription status and approved uses vary by jurisdiction. Check the exact national product record before relying on a formulation.
Availability depends on the active ingredient, route and formulation; not every medicine in this reference has a current UK product.
U.S. authorization and formulation availability may differ substantially from Europe and other markets.
How it is used
Use the dose appropriate to the purpose. Routine prevention around pregnancy and treatment of proven folate deficiency are different clinical situations, and some higher-risk pregnancies use specialist-prescribed higher doses.
For prescription treatment, use the patient-specific regimen rather than copying a dose from another person or another formulation.
Side effects
Folic acid is usually well tolerated. Gastrointestinal discomfort or hypersensitivity is uncommon. The main clinical safety issue is avoiding treatment of an unexplained macrocytic anemia without considering vitamin B12 deficiency.
Important warnings and monitoring
Neurologic symptoms, significant anemia or recurrent deficiency need investigation rather than indefinite self-supplementation alone. High-dose folic acid should not substitute for diagnosis of vitamin B12 deficiency.
Monitoring context: Reason for supplementation, diet, blood count and vitamin B12 status when deficiency anemia is suspected.
Interactions
Folate can interact with antifolate medicines such as methotrexate depending on the indication, and some antiseizure medicines can alter folate status or be affected by supplementation. Coordinate therapeutic-dose folate with the prescriber.
Pregnancy and breastfeeding
Folic acid is specifically recommended before conception and during early pregnancy to reduce neural-tube-defect risk. The required dose depends on baseline risk and national guidance.
Overdose and accidental extra doses
Serious acute toxicity is uncommon, but chronic unnecessary high-dose intake can complicate recognition of vitamin B12 deficiency. Discuss prolonged high-dose use with a clinician.
Practical clinical context
The most important distinction is between the medicine entity and a specific marketed product. Strength, salt, route, modified-release design, age authorization and prescription status can change between products. When safety or dosing decisions matter, use the exact package leaflet, prescribing information or national regulator record for the product actually being used.
This page deliberately separates general evidence from the project’s Russian-language support site folic-acid.ru; that site identifies the cross-language entity but is not treated as an authority for clinical claims.
Common questions
Frequently asked questions
Folate is the general vitamin B9 term; folic acid is the synthetic form widely used in supplements and fortified foods.
Adequate folic acid around conception and early pregnancy reduces the risk of neural-tube defects.
No. Anemia has many causes, and vitamin B12 deficiency in particular should not be missed.
Yes, the relationship depends on why methotrexate is being used and the prescribed folate regimen. Follow the treating clinician’s plan.
No. Higher doses are used for specific indications or risk groups, but unnecessary long-term high doses can complicate diagnosis of vitamin B12 deficiency.
Sources
Clinical statements in this reference are based on named public-health, regulatory or guideline sources. Product-specific labeling remains authoritative for exact indications, dosing and contraindications.
This medicine reference is evidence-based and is awaiting clinician review. It is not a substitute for personalized medical advice.