Phenoxymethylpenicillin for infection
Penicillin V
Revisado por Sid DajaniÚltima actualización por Michael Stewart, MRPharmSÚltima actualización 19 dic 2022
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Make sure you tell your doctor if you are allergic to penicillin. Phenoxymethylpenicillin is a type of penicillin - do not take it if you are allergic to penicillin.
Space your doses out evenly over the day and complete the full course of the antibiotic, even if you feel your infection has cleared up. You should take phenoxymethylpenicillin when your stomach is empty of food (so an hour before you eat, or two hours afterwards).
Si tiene una reacción alérgica (como hinchazón alrededor de la boca, dificultad para respirar o erupción roja), póngase en contacto con un médico inmediatamente.
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About phenoxymethylpenicillin
Tipo de medicamento | Un antibiótico penicilina |
Utilizado para | Infecciones (en adultos y niños) |
También llamado | Penicillin V |
Disponible como | Comprimidos y medicamentos orales líquidos |
Phenoxymethylpenicillin is an antibacterial medicine. This means that it stops infections caused by germs (bacteria). It works by killing the germs that are causing the infection.
Phenoxymethylpenicillin is prescribed to treat infections such as chest infections, tonsillitis, cellulitis, ear infections, and dental abscesses. It is used in particular for respiratory infections in children. You may also be prescribed phenoxymethylpenicillin to protect against infection if (for example) you have had rheumatic fever, or if you have sickle-cell disease, or if you have had your spleen removed.
Before taking phenoxymethylpenicillin
Some medicines are not suitable for people with certain conditions, and sometimes a medicine can only be used if extra care is taken. For these reasons, before you (or your child) start taking phenoxymethylpenicillin it is important that your doctor (or dentist) knows:
If you have an allergic condition (such as asthma, eczema, or hay fever), or if you have ever had an allergic reaction to a medicine. This is especially important if you have ever had a bad reaction to any penicillin antibiotic.
If you are pregnant or breastfeeding (although phenoxymethylpenicillin is not known to be harmful to babies).
Si está tomando otros medicamentos. Esto incluye cualquier medicamento que esté tomando y que pueda adquirirse sin receta, así como medicamentos a base de plantas y complementarios.
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How to take phenoxymethylpenicillin
Before you start the treatment, read the manufacturer's printed information leaflet from inside the pack. It will give you more information about phenoxymethylpenicillin, and it will also provide you with a full list of the side-effects which you may experience from taking it.
Take phenoxymethylpenicillin exactly as your doctor tells you to. It is taken four times daily for short-term infections. If you have been prescribed it long-term (to protect from infection) then you will be asked to take one or two doses every day. Your doctor or pharmacist will tell you what dose is right for you to take, and the full directions will also be printed on the label of the pack to remind you about what was said to you. It is important that you space out the doses evenly during the day.
Si le han dado un medicamento líquido para un niño, lea atentamente las instrucciones para asegurarse de dosificar la cantidad correcta de medicamento.
You should take phenoxymethylpenicillin when your stomach is empty, which means taking your doses one hour before you eat any food, or waiting until two hours afterwards. This is because your body absorbs less of the medicine after a meal, which means it is less effective.
If you forget to take a dose at your usual time, take it as soon as you remember. Try to take the correct number of doses each day, but do not take two doses at the same time to make up for a forgotten dose.
Aproveche al máximo su tratamiento
Even if you feel your infection has cleared up, keep taking the antibiotic until the course is finished (unless you are told to stop sooner by a doctor). This is to prevent the infection from coming back.
A course of treatment for an infection often lasts around seven days, although it can be for up to 10 days. If you still feel unwell after finishing the course, go back to see your doctor. If you have been prescribed phenoxymethylpenicillin to protect you from infection then it is likely you will be asked to take it long-term.
After taking a course of an antibiotic, some people develop redness and itchiness in the mouth or vagina. These are caused by an infection commonly known as thrush. If this happens to you, speak with your doctor or pharmacist for advice.
Este antibiótico puede impedir la acción de la vacuna oral contra la fiebre tifoidea. Si tiene que vacunarse, asegúrese de que la persona que le trata sabe que está tomando este medicamento.
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Can phenoxymethylpenicillin cause problems?
Along with their useful effects, most medicines can cause unwanted side-effects although not everyone experiences them. The table below contains some of the most common ones associated with phenoxymethylpenicillin. The best place to find a full list of the side-effects which can be associated with your medicine, is from the manufacturer's printed information leaflet supplied with the medicine. Alternatively, you can find an example of a manufacturer's information leaflet in the reference section below. Speak with your doctor or pharmacist if any of the following continue or become troublesome.
Común phenoxymethylpenicillin side-effects (these affect around 1 in 10 people) | ¿Qué puedo hacer si me ocurre esto? |
Sensación de malestar (náuseas) o náuseas (vómitos), dolor de barriga (abdominal) | Coma alimentos sencillos |
Diarrea | Drink plenty of water to replace any lost fluids. If the diarrhoea continues, becomes severe, or contains blood, let your doctor know directamente |
Redness and itchiness (thrush) in the mouth or vagina | Speak with your doctor or pharmacist for advice about treatment |
Erupciones cutáneas y otras reacciones de tipo alérgico | Let your doctor know as soon as possible as your treatment may need to be changed |
Important: if you develop an itchy rash, swollen face or mouth, or have difficulty breathing, these could be signs that you are allergic to a penicillin antibiotic. Do not take any more phenoxymethylpenicillin, and speak with your doctor or go to your local accident and emergency department straightaway.
Si experimenta cualquier otro síntoma que considere que puede deberse al medicamento, consulte a su médico o farmacéutico.
How to store phenoxymethylpenicillin
Mantenga todos los medicamentos fuera del alcance y de la vista de los niños.
Almacenar en un lugar fresco y seco, lejos del calor y la luz directos.
Si te han dado un medicamento líquido, guárdalo en el frigorífico. Lo habrá preparado la farmacia y dura siete días, así que compruebe la fecha de caducidad del frasco y no lo utilice después de esa fecha.
Información importante sobre todos los medicamentos
Información importante sobre todos los medicamentos
No tome nunca más de la dosis prescrita. Si sospecha que usted u otra persona ha tomado una sobredosis de este medicamento, acuda al servicio de urgencias de su hospital. Llévese el envase, aunque esté vacío.
Este medicamento es para usted. Nunca se lo dé a otras personas aunque su enfermedad parezca ser la misma que la suya.
Si compra algún medicamento, compruebe con un farmacéutico que es seguro tomarlo con sus otros medicamentos.
Si va a someterse a una operación o a un tratamiento dental, comunique a la persona que lleve a cabo el tratamiento qué medicamentos está tomando.
No guarde medicamentos caducados o que no desee. Llévelos a su farmacia local, que se encargará de eliminarlos por usted.
Si tiene cualquier duda sobre este medicamento pregunte a su farmacéutico.
MHRA - Notificación de reacciones adversas
Notifique a la Agencia Reguladora de Medicamentos y Productos Sanitarios las sospechas de efectos secundarios de medicamentos, vacunas, cigarrillos electrónicos, incidentes con productos sanitarios o productos defectuosos o falsificados para garantizar un uso seguro y eficaz.
Lecturas complementarias y referencias
- Manufacturer's PIL, Phenoxymethylpenicillin 125 mg/5 ml and 250 mg/5 ml Oral Solution; Flamingo Pharma (UK) Ltd, The electronic Medicines Compendium. Dated July 2020.
- Manufacturer's PIL, Phenoxymethylpenicillin 250 mg film-coated tablets; Brown and Burk UK Ltd, The electronic Medicines Compendium. Dated May 2015.
- Medicamentos BNF completa 89ª edición; Asociación Médica Británica y Real Sociedad Farmacéutica de Gran Bretaña, Londres.
Historia del artículo
La información de esta página ha sido redactada y revisada por médicos cualificados.
Fecha límite de la próxima revisión: 18 dic 2025
19 dic 2022 | Última versión

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