What is the folic acid dose in pregnancy in India?

Standard recommendation: 400 mcg/day for all women planning pregnancy (periconceptional). High-risk women (prior NTD baby, epilepsy, diabetes, BMI >30): 5 mg/day starting 3 months before conception and continued through the first trimester. Under India's national WIFS programme, 500 mcg/day is given to pregnant women along with iron.

What is the folic acid dose for megaloblastic anaemia?

Folic acid 5 mg once daily orally for 4 months (or until haematological recovery). If cause is dietary deficiency, 1 mg/day may suffice but 5 mg is used in malabsorption. Always exclude B12 deficiency before treating with folic acid alone — treating B12 deficiency with folate alone can precipitate subacute combined degeneration of the cord.

What is folinic acid rescue after methotrexate?

Folinic acid (leucovorin/calcium folinate) rescue is given 24 hours after high-dose methotrexate: typically 15 mg IV/IM/oral every 6 hours × 8 doses (or until MTX levels are safe). Low-dose MTX for RA/psoriasis uses folic acid 5 mg once weekly (24–48 hours after MTX dose) to reduce toxicity — NOT folinic acid.

Folic Acid Dose Calculator India | Pregnancy · Anaemia · MTX Rescue

Folic Acid Dose Calculator

Indication / Risk Category

Gestational stage

Folic Acid Dose

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Formulation

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Duration

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Guideline

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Indian brand

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🌿 Drug profile

ClassWater-soluble B-vitamin

FormsFolic acid · Folinic acid (leucovorin)

Half-life~6 hours

Bioavailability~85% oral (fasting)

RDA (adult)200 mcg/day (ICMR)

Pregnancy RDA500 mcg/day (ICMR)

UL (adults)1000 mcg/day synthetic

🏷️ Indian brands

Folic acid 5mgFolvite 5mg

Folic acid 1mgFolvite 1mg

Iron + FolateFefol · Autrin · Dexorange

Pregnancy comboPregnacare · Obimin

Folinic acidLeucovorin (Intas, Cipla)

WIFS tabletIFA tablet (Govt) — 500mcg + 100mg Fe

⚠️ Critical warnings

🚫 Never treat megaloblastic anaemia with folate alone without ruling out B12 deficiency — folate corrects blood picture but worsens B12-related neurological damage (SACD).

⚠️ High-dose folic acid (≥5mg/day) may reduce anticonvulsant efficacy in epilepsy — use with caution.

💊 Folinic acid (leucovorin) ≠ folic acid — do NOT substitute in MTX rescue protocols.

Folic Acid — Clinical Guide for India

Folic acid (Vitamin B9) deficiency is one of the most clinically significant micronutrient deficiencies in India, particularly among women of reproductive age, pregnant women, and patients on anti-folate drugs. India has among the highest rates of neural tube defects (NTDs) globally — approximately 4–8 per 1000 live births — and periconceptional folic acid supplementation is the single most effective preventive intervention.

Pregnancy supplementation — standard vs high-risk dosing

All women planning pregnancy should take folic acid 400–500 mcg/day starting at least one month before conception and continuing through the first trimester. High-risk women — those with a prior NTD-affected pregnancy, epilepsy on anticonvulsants, pre-existing diabetes, or BMI >30 — require a higher dose of 5 mg/day (Folvite 5mg), starting 3 months before conception. Under India's Weekly Iron and Folic Acid Supplementation (WIFS) programme, adolescent girls and pregnant women receive government-supplied IFA tablets containing 500 mcg folic acid + 100 mg elemental iron.

Megaloblastic anaemia — folate vs B12

Before treating megaloblastic anaemia with folic acid, B12 deficiency must be excluded — this is a critical clinical rule. Folate treatment corrects the haematological picture of B12 deficiency (macrocytic anaemia) but does not treat, and may unmask or worsen, B12-related neurological complications including subacute combined degeneration of the cord (SACD). Once B12 deficiency is excluded, folate deficiency anaemia is treated with folic acid 5 mg orally once daily for 4 months.

Methotrexate and folate — an important distinction

Low-dose MTX (for RA, psoriasis, JIA): folic acid 5 mg once weekly, taken 24–48 hours after the MTX dose, reduces GI side effects and hepatotoxicity without reducing efficacy. High-dose MTX (for cancers): requires folinic acid (leucovorin / calcium folinate) rescue — not folic acid — starting 24 hours after MTX infusion. These two situations are frequently confused in practice. Folinic acid bypasses the DHFR enzyme that MTX inhibits; folic acid does not.

Indication	Dose	Duration	Guideline
Routine pregnancy / TTC	400–500 mcg/day	Preconception + 1st trimester	WHO / FOGSI
High-risk (prior NTD, epilepsy, DM)	5 mg/day	3 months pre-conception + 1st trim	NICE / FOGSI
Megaloblastic anaemia (folate)	5 mg/day	4 months	BNF / WHO
Haemolytic anaemia prophylaxis	5 mg/week	Ongoing	BNF
Haemodialysis	5 mg 3× weekly (post-dialysis)	Ongoing	KDIGO
Low-dose MTX (RA / psoriasis)	5 mg once weekly (24–48h after MTX)	Throughout MTX therapy	BSR / ACR
High-dose MTX rescue (folinic acid)	15 mg IV/oral q6h × 8 doses	Starting 24h after MTX	Oncology protocol
Paediatric folate deficiency	0.1 mg/kg/day (max 5mg)	4 months	BNFC / IAP

Frequently Asked Questions

Why is folic acid given before conception, not just after pregnancy is confirmed?+

Neural tube closure occurs between days 21–28 of gestation — often before a woman knows she is pregnant. To be effective at preventing NTDs (spina bifida, anencephaly), folic acid must be present at adequate levels in tissues before and during neural tube closure. Starting supplementation only after a positive pregnancy test is too late for NTD prevention. Periconceptional supplementation for at least 1 month before conception is the WHO and FOGSI recommendation.

Can I use the government IFA tablet instead of Folvite for pregnancy?+

Yes — the government IFA (Iron-Folic Acid) tablet contains 500 mcg folic acid + 100 mg elemental iron and is suitable for routine supplementation in low-risk pregnancies under the WIFS programme. However, women at high risk for NTDs (prior NTD baby, epilepsy on valproate/carbamazepine, diabetes) need a dedicated 5 mg folic acid tablet (Folvite 5mg) — the IFA tablet does not contain sufficient folate for high-risk prophylaxis.

What is the difference between folic acid and folinic acid?+

Folic acid is the synthetic form of Vitamin B9 that requires conversion by DHFR (dihydrofolate reductase) to become active. Folinic acid (leucovorin / calcium folinate) is the active, reduced form that bypasses DHFR. This is crucial during high-dose MTX therapy: MTX inhibits DHFR, so folic acid cannot be converted and would be ineffective. Folinic acid rescues tissues directly. For low-dose MTX (RA), folic acid is sufficient. For oncology high-dose MTX rescue, folinic acid (leucovorin) is mandatory.

⚠️Always exclude Vitamin B12 deficiency before treating megaloblastic anaemia with folic acid alone. High-risk NTD prevention requires 5 mg/day — not 400 mcg. Verify against current FOGSI, WHO, and BNF guidelines.

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