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Folic Acid: uses, side effects & brands
Folic acid prevents certain anaemias and neural-tube defects — important before and in early pregnancy. It belongs to the Vitamin & supplement group. Supplements correct deficiencies and support health when diet or absorption falls short.
Drug type — dosing is set by your doctor
| Measure | Range |
|---|---|
| Drug class | Vitamin & supplement |
| Type | Prescription |
| Dose | Individual — ask your doctor or pharmacist |
What it is used for
- Preventing neural-tube defects (such as spina bifida) before and in early pregnancy
- Treating anaemia caused by low folate
- Reducing side effects of methotrexate (on the days your doctor sets)
- Extra folate needs, e.g. some blood disorders or long-term epilepsy medicines
Common brand names
- India: Folvite, Folinext
- Worldwide: (folic acid brands)
Common side effects
- Usually very well tolerated
- Mild nausea or loss of appetite
- Bloating or wind
Before taking it — precautions
- Tell your doctor if you could be low in vitamin B12 — folic acid can correct the anaemia while B12 nerve damage continues
- Tell your doctor if you take epilepsy medicines such as phenytoin — folic acid can change their levels
- Planning a pregnancy: start before conception; some women (e.g. with epilepsy, diabetes or a previous affected pregnancy) need a higher amount set by the doctor
When to see a doctor urgently
- Rash, swelling of the face or lips, or difficulty breathing (urgent)
- Numbness, tingling or unsteady walking (may point to vitamin B12 deficiency)
- Ongoing tiredness, paleness or breathlessness despite treatment
Frequently asked questions
When should I start folic acid for pregnancy?
Ideally before you start trying for a baby and through the first three months of pregnancy, because the baby's brain and spine form very early — often before you know you are pregnant.
Is folic acid the same as folate?
Folate is the natural form found in green leafy vegetables, pulses and fruit. Folic acid is the man-made form used in tablets and fortified foods.
Why was I given folic acid with methotrexate?
Methotrexate blocks folate, and folic acid reduces side effects such as mouth sores and nausea. Take it only on the days your doctor tells you.
Explore more
Sources & further reading
- World Health Organization (WHO)
- MedlinePlus — U.S. National Library of Medicine
- Ministry of Health & Family Welfare, India
- Indian Council of Medical Research (ICMR)
Reviewed by Dr. Sanjay Anbu, MBBS. MedDroid is an AI medical assistant and can make mistakes. It provides general health information, not a diagnosis or medical advice — always consult a qualified clinician. In an emergency, contact your local emergency number immediately.