Folsyra
folate - FolicA, FoliSol, Lexpec
Granskad av Sid DajaniSenast uppdaterad av Michael Stewart, MRPharmSSenast uppdaterad 17 apr 2023
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As well as taking folic acid, try to eat a healthy diet containing lightly cooked green leafy vegetables.
Folic acid rarely causes side-effects.
Överblick
Folic acid, also known as vitamin B9, is vital for growth and general health.
It is available as tablets and oral liquid.
A lack of folic acid can lead to a type of anaemia, causing tiredness.
Pregnant women are advised to take folic acid to reduce the risk of birth defects.
Folic acid is also used with methotrexate for severe Crohn's, psoriasis, and arthritis.
Side-effects are rare, but can include mild upset stomach.
About folic acid
Typ av medicin | Vitamin B9 |
Används för | Folic acid deficiency in adults and children; folic acid supplementation before/during pregnancy |
Även kallad | Folate; FolicA®; FoliSol®; Lexpec® |
Tillgänglig som | Tablets and oral liquid |
Folic acid in anaemia
Vitamins are substances required by our bodies in small amounts for growth and general health. Our bodies do not store very much folic acid so we need to have a regular fresh supply. We can usually get the amounts we need from the food that we eat. Many foods contain folic acid, including spinach, sprouts, broccoli, green beans, peas, chickpeas, brown rice, kidney, liver and potatoes. Some people, for various reasons, may not receive enough from their diet alone. Folic acid is important for the production of red blood cells. A lack of it can lead to anaemia, which can cause tiredness and sometimes other symptoms. Folic acid deficiency is treated easily by taking a course of folic acid tablets for a few months.
Folic acid in pregnancy
Pregnant women in particular need a good supply of folic acid because it is used by the developing baby. It has been shown that taking folic acid supplements decreases the chance of spina bifida and other neural tube defects in the baby. The very early stages of pregnancy are crucial in the need for folic acid and this is why folic acid supplements are recommended for women planning a pregnancy.
Extra folic acid is advised for at least the first 12 weeks of graviditeten for all women - even if you are healthy and have a good diet. For most women, a supplement of 400 micrograms of folic acid a day from before conception until the twelfth week of pregnancy is recommended. It is best to start taking the extra folic acid before becoming pregnant. If the pregnancy is unplanned then start taking folic acid as soon as you know you are pregnant. You can buy tablets of folic acid at most health food shops or pharmacies.
If you have had a previous pregnancy affected by a neural tube defect or if there is a family history of such, a supplement of 5 mg (milligrams) of folic acid each day until the twelfth week is recommended. A supplement of 5 mg daily in pregnancy is also recommended with some medical conditions such as coeliac disease, diabetes, and sickle cell anaemia, and if you are taking medicines to treat epilepsy. This strength of folic acid tablet is not available to buy. Your doctor will prescribe the tablets for you.
Folic acid in other conditions
Folic acid is also used alongside methotrexate treatment in people with severe Crohns sjukdom, psoriasis, och artrit. When it is used in these medical conditions, folic acid is taken on a different day of the week to methotrexate. It is taken to reduce the side-effects which can be caused by methotrexate.
How to take folic acid
If you have bought folic acid tablets because you are planning to have a baby, read the manufacturer's printed information on the pack (or from inside it) before you start taking the tablets. Make sure you are clear about what dose to take - the recommended dose is 400 micrograms once daily. The 5 mg tablet has more than ten times as much folic acid as this. If you have any questions, ask a pharmacist to advise you.
If you have been prescribed 5 mg folic acid tablets by a doctor, take them exactly as you are told to. Depending upon the reason for which you are taking folic acid, you may be asked to take one tablet every day, or one tablet only on certain days of the week. Try to take your doses at the same time of day each day that you take them, as this will help you to remember to take the tablets regularly. There will be more information about folic acid on the manufacturer's printed information leaflet from inside your pack.
It is not important whether you take folic acid before or after meals.
If you forget to take a tablet, take it as soon as you remember. If you do not remember until the following day, skip the forgotten dose. Do not take two doses at the same time to make up for a missed dose.
Få ut det mesta av din behandling
In addition to taking folic acid, try also to eat a healthy diet including foods rich in folic acid, such as spinach, sprouts, broccoli, green beans and potatoes. Lightly cook the vegetables, as the cooking process reduces the amount of folic acid they contain. Some bread and breakfast cereals are fortified with folic acid also.
Can folic acid cause problems?
Folic acid supplements are unlikely to cause any side-effects. The 5 mg tablets may, on rare occasions, cause mild upset stomach (loss of appetite, nausea, and a bloated feeling). If you experience any symptoms which you think may be due to the tablets, speak with your doctor or pharmacist for advice.
How to store folic acid
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Never take more than the prescribed dose. If you suspect that you or someone else might have taken an overdose of this medicine go to the accident and emergency department of your local hospital. Take the container with you, even if it is empty.
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Denna medicin är för dig. Ge den aldrig till andra människor även om deras tillstånd verkar vara detsamma som ditt.
Behåll inte föråldrade eller oönskade mediciner. Ta dem till ditt lokala apotek som kommer att ta hand om dem åt dig.
Om du har några frågor om denna medicin, fråga din apotekare.
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Vanliga frågor
What is the difference between folic acid and folate?
Folic acid is also known as folate, and they refer to Vitamin B9. The article lists 'Folate' as another name for folic acid.
How important is it to take folic acid before getting pregnant?
The very early stages of pregnancy are crucial for a baby's development, specifically regarding the need for folic acid. Starting folic acid supplements before conception significantly lowers the chance of neural tube defects like spina bifida in the baby. If a pregnancy is unplanned, it's recommended to start taking it as soon as you find out you are pregnant.
Are there specific foods I should eat to increase my folic acid intake, and how should I prepare them?
Yes, many foods contain folic acid, including spinach, sprouts, broccoli, green beans, peas, chickpeas, brown rice, kidney, liver, and potatoes. Some bread and breakfast cereals are also fortified with folic acid. It's recommended to lightly cook vegetables, as extensive cooking can reduce their folic acid content.
Can I take folic acid alongside other medications for different conditions?
Folic acid is used even next to methotrexate treatment for conditions such as Crohn's disease, psoriasis, and arthritis. In these cases, it is specifically taken on a different day of the week than methotrexate to help reduce side-effects caused by that medication. If you are taking other medications, you should always discuss this with your doctor or pharmacist.
What should I do if I forget to take a dose of folic acid?
If you forget to take a tablet, you should take it as soon as you remember. However, if you don't remember until the following day, you should skip the forgotten dose. It's important not to take two doses at the same time to make up for a missed dose.
Vidare läsning och referenser
- Manufacturer's PIL, Folic Acid Tablets 5 mg; Wockhardt UK Ltd, electronic Medicines Compendium. Dated May 2018.
Om författarenVisa fullständig biografi

Michael Stewart, MRPharmS
Ansvarig för granskning av medicinbroschyrer – Konsult, Apotekare
BPharm (Hons), MRPharmS
Michael är en apotekare som arbetar i Midlands och South Yorkshire med mer än 20 års erfarenhet av att ge råd om läkemedel och medicinska tillstånd. Han har en stark bakgrund inom vårdutbildning och har producerat och levererat utbildningskurser för apoteksteam och personal inom vårdboenden, inklusive sjuksköterskor. Han har också bidragit till apoteksrådgivande styrelser för hantering av mindre allvarliga tillstånd i samhället.
Om recensenten

Sid Dajani
Sultan Dajani tog examen vid London School of Pharmacy 1994 och blev den yngsta valda medlemmen i Royal Pharmaceutical Society-rådet sedan dess grundande 1842.
Artikelhistorik
Informationen på denna sida är skriven och granskad av kvalificerade kliniker.
Artikeln finns också på Engelska, Tyska, Spanska, Franska, Italienska, Portugisiska, Hindi, Hebreiska, Arabiska, och Svenska.
Next review due: 15 Oct 2027
17 apr 2023 | Senaste versionen

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