Vitamina A
Revisado por pares por Sid DajaniÚltima actualización por Michael Stewart, MRPharmSÚltima actualización 5 de oct. de 2024
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Vitamin A supplements are taken to prevent vitamin A deficiency (although this is rare in the UK).
You should not take vitamin A supplements if you are pregnant.
De un vistazo
Vitamin A is important for healthy eyes, good eyesight, healthy skin, and fighting infections.
It is available as capsules or drops, often with other vitamins.
Your doctor may recommend vitamin A supplements for deficiency or risk of deficiency.
Do not take vitamin A supplements if you are pregnant or breastfeeding, unless prescribed.
Foods like eggs, milk, liver, and fish-liver oils contain vitamin A.
Always follow the recommended dose and read the manufacturer's leaflet.
About vitamin A
Tipo de medicamento | Vitamina A |
Usado para | To prevent or treat vitamin A deficiency |
También llamado | Retinol |
Disponible como | Capsules or drops (multivitamin) |
Vitamin A is a vitamin which is important for healthy eyes, good eyesight and a healthy skin. It also helps you to fight infections.
Your doctor may recommend that you (or your child) take a supplement of vitamin A if you cannot get sufficient from your normal diet, or if you are at risk of deficiencia de vitamina A for some other reason. Vitamin A supplements usually contain other vitamins also, such as vitamin D and vitamin C. They are available to buy without a prescription.
Before taking vitamin A
To make sure that this is the right treatment for you, before you start taking vitamin A it is important that you speak with your doctor or pharmacist:
If you are pregnant, trying for a baby or breastfeeding. This is because you are advised reportado to take vitamin A supplements during pregnancy or if you are breastfeeding, unless prescribed by a doctor.
Si alguna vez has tenido una reacción alérgica a un medicamento.
If you are taking other medicines, including those available to buy without a prescription, as well as herbal and complementary medicines. It is particularly important that you say if you are taking a retinoid preparation (such as isotretinoin) for a skin condition.
How to take vitamin A
Before you start taking a vitamin A supplement, please read the manufacturer's printed information leaflet from inside the pack.
Vitamin supplements are usually taken once a day. Your doctor, pharmacist or health visitor will tell you how much you (or your child) should take. The dose will also be on the label of the pack. You can take vitamin supplements at whatever time of day you find easiest to remember. They can be taken either before or after meals.
Do not take more than the dose which has been recommended or prescribed.
Obteniendo el máximo de tu tratamiento
Foods that contain vitamin A are eggs, milk, liver and fish-liver oils. Another substance called beta-carotene (which is found in green leafy and orange/yellow vegetables and fruits) can be converted by your body into vitamin A and so is also a good source. Try to regularly include some of these foods in your meals.
Just a reminder that you should not take vitamin A supplements if you are (or think you may be) pregnant. This includes taking fish-liver oil preparations. This is because there is evidence to suggest that high levels of vitamin A can cause problems in babies. Also, you should not eat liver or liver-containing foods such as liver pâté or liver sausage because they too contain a lot of vitamin A.
Before buying or taking any 'over-the-counter' medicines, please check with a pharmacist which medicines are safe for you to take alongside vitamin A.
Can vitamin A cause problems?
Although vitamin A is unlikely to cause any side-effects at the recommended doses, large overdoses can be associated with unwanted effects. If you experience any symptoms which you think may be due to the medicine, speak with your doctor or pharmacist for further advice.
How to store vitamin A
Mantenga todos los medicamentos fuera del alcance y la vista de los niños.
Almacenar en un lugar fresco y seco, lejos del calor y la luz directos.
Información importante sobre todos los medicamentos
Información importante sobre todos los medicamentos
Si vas a someterte a una operación o tratamiento dental, informa a la persona que realiza el tratamiento sobre los medicamentos que estás tomando.
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 for advice. Take the container with you, even if it is empty.
Este medicamento es para ti. No lo des a otras personas, incluso si su condición parece ser la misma que la tuya.
No guardes medicamentos caducados o no deseados. Llévalos a tu farmacia local, que se encargará de desecharlos por ti.
If you have any questions about the medicine ask your pharmacist.
Informar efectos secundarios de un medicamento o vacuna
Si experimenta efectos secundarios, puede reportarlos en línea a través de Sitio web de Yellow Card.

¿Inseguro sobre mezclar medicamentos?
Verifica posibles interacciones entre medicamentos, suplementos y alimentos antes de tomarlos juntos.
Preguntas frecuentes
What are the main benefits of taking vitamin A?
Vitamin A is an important vitamin that helps maintain healthy eyes and good eyesight. It also contributes to healthy skin and plays a role in helping your body fight off infections.
Can I buy vitamin A supplements without a prescription?
Yes, vitamin A supplements are available to buy without a prescription. They often come as part of a multivitamin mixture, also containing other vitamins like vitamin D and vitamin C.
Is it safe to consume foods rich in vitamin A if I am pregnant?
If you are pregnant, you should not eat liver or foods containing liver, such as liver pâté or liver sausage, because they contain very high levels of vitamin A, which can cause problems for babies. You should also avoid fish-liver oil preparations. Always consult your doctor or pharmacist if you are pregnant or think you might be.
How can I ensure I am taking the correct dose of vitamin A?
Before you start, make sure to read the manufacturer's leaflet inside the pack. Your doctor, pharmacist, or health visitor will advise you on the correct dosage, and this information will also be printed on the label of the packaging. Do not take more than the recommended or prescribed amount.
Can vitamin A supplements interact with other medications I am taking?
Yes, vitamin A can interact with other medicines. It's particularly important to tell your doctor or pharmacist if you are taking any retinoid preparations, such as isotretinoin, for a skin condition, or any other medicines, including over-the-counter, herbal, or complementary remedies.
Lecturas adicionales y referencias
- Medicamentos Completos BNF 89ª Edición; Asociación Médica Británica y Sociedad Real de Farmacia de Gran Bretaña, Londres.
Sobre el autorVer biografía completa

Michael Stewart, MRPharmS
Gerente de Revisión de Folletos de Medicamentos – Contratista, Farmacéutico
BPharm (Hons), MRPharmS
Michael es un farmacéutico comunitario que ejerce en Midlands y South Yorkshire con más de 20 años de experiencia asesorando sobre medicamentos y condiciones médicas. Tiene una sólida formación en capacitación en atención médica, habiendo producido e impartido cursos de formación para equipos de farmacia y personal de entornos de atención residencial, incluidas enfermeras. También ha contribuido a juntas asesoras de farmacia para la gestión de condiciones de baja gravedad en la comunidad.
Acerca del revisor

Sid Dajani
Sultan Dajani se graduó en la Escuela de Farmacia de Londres en 1994 y se convirtió en el miembro más joven elegido para el consejo de la Sociedad Real de Farmacia desde su fundación en 1842.
Historial del artículo
La información en esta página está escrita y revisada por pares por clínicos calificados.
Artículo también disponible en Inglés, Alemán, Español, Francés, Italiano, Portugués, Hindi, Hebreo, Árabe, y Sueco.
Próxima revisión: 9 de octubre de 2027
5 de oct. de 2024 | Última versión

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