Ampicilina para infecciones
Penbritin
Revisado por pares por Sid DajaniÚltima actualización por Michael Stewart, MRPharmSÚltima actualización 11 Mar 2025
Cumple con las directrices editoriales
- DescargarDescargar
- Compartir
- Language
- Discusión
- Versión en audio
- Agregar a fuentes preferidas en Google
Make sure you tell your doctor if you are allergic to penicillin. Ampicillin is a type of penicillin - do reportado tómalo si eres alérgico a la penicilina.
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 ampicillin 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, dificultades para respirar o una erupción roja), contacte a un médico de inmediato.
De un vistazo
Ampicillin is a penicillin antibiotic used to treat bacterial infections like chest, ear, and urine infections.
Take ampicillin on an empty stomach, either an hour before food or two hours after.
Complete the full course of antibiotics as prescribed, even if you feel better.
Tell your doctor if you suspect glandular fever or have kidney problems.
Inform your doctor if you have had an allergic reaction to any medicine, especially penicillin.
Seek urgent medical help if you develop an itchy rash, swollen face, or breathing difficulties.
About ampicillin
Tipo de medicamento | A penicillin antibiotic |
Usado para | Infections (in adults and children) |
Disponible como | Capsules, oral liquid medicine and injection |
Ampicillin is given to treat a bacterial infection. It is mainly prescribed for sinus y infecciones respiratorias, urine infections, and recurrentes. It is a penicillin antibiotic which treats infection by killing the germs (bacteria) responsible for the infection.
Before taking ampicillin
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 start taking ampicillin it is important that your doctor knows:
If you suspect you may have glandular fever (the symptoms are high temperature (fever), sore throat, swollen glands).
If you have an allergic condition, 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.
Si tienes algún problema con el funcionamiento de tus riñones.
If you are pregnant or breastfeeding. Ampicillin is not known to be harmful to babies; however, it is still important that you tell your doctor if you are expecting or breastfeeding a baby.
Si está tomando otros medicamentos. Esto incluye cualquier medicamento que esté tomando y que esté disponible para comprar sin receta, así como medicamentos herbales y complementarios.
How to take ampicillin
Before you start the treatment, read the manufacturer's printed information leaflet from inside the pack. It will give you more information about ampicillin and will provide you with a full list of the side-effects which you may experience from taking it.
Take ampicillin exactly as your doctor tells you to. It is usually taken four times a day, every six hours. Your doctor or pharmacist will tell you how you should take the medication, and this information will be printed on the label of the pack to remind you. It is important that you space out the doses evenly during the day. Swallow the capsules with a drink of water.
You should take ampicillin 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 ampicillin after a meal, which means the medicine is less effective.
If you have been given liquid medicine for a child, read the directions carefully to make sure you measure out the correct amount of medicine.
If you forget to take a dose, take one 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.
Obteniendo el máximo de tu tratamiento
Even if you feel your infection has cleared up, keep taking the antibiotic until the course is finished (unless a doctor tells you to stop). This is to prevent the infection from coming back.
Antibiotics are prescribed in short courses of treatment. Your doctor will tell you how long your course of treatment will last - this is not usually for longer than 14 days. If you still feel unwell after finishing the course, go back to see your doctor.
Some people develop redness and itching in the mouth or vagina (thrush) after taking a course of antibiotics. If this happens to you, speak with your doctor or pharmacist for advice.
If you are taking the contraceptive 'pill' at the same time as this antibiotic, the effectiveness of the 'pill' can be reduced if you have a bout of being sick (vomiting) or diarrhoea which lasts for more than 24 hours. If this should happen, ask your doctor or pharmacist for advice about what additional contraceptive precautions to use over the next few days. There is no need to use additional precautions for any bouts of sickness or diarrhoea which last for less than 24 hours.
Ampicillin can stop the oral typhoid vaccine from working. If you are due to have any vaccinations, make sure the person treating you knows that you are taking this antibiotic.
Can ampicillin 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 ampicillin. You will find a full list in the manufacturer's information leaflet supplied with your medicine. The unwanted effects often improve as your body adjusts to the new medicine, but speak with your doctor or pharmacist if any of the following continue or become troublesome.
Common ampicillin side-effects (these affect fewer than 1 in 10 people) | ¿Qué puedo hacer si experimento esto? |
Sentirse mal (náuseas) o estar enfermo (vómitos) | Mantente con alimentos simples |
Diarrea | Bebe mucha agua para reemplazar los líquidos perdidos. Si la diarrea continúa, se vuelve severa o contiene sangre, informa a tu médico de inmediato |
Redness and itching in the mouth or vagina (thrush) | Speak with a pharmacist or your doctor for advice about treatment |
Erupción cutánea | Let your doctor know as soon as possible as your treatment will need to be changed |
Importante: if you develop an itchy rash, swollen face or mouth, or have difficulty breathing, these may be signs that you are allergic to a penicillin antibiotic.
Do not take any more of this medicine and speak with your doctor or go to your local accident and emergency department straightaway.
If you experience any other symptoms which you think may be due to the antibiotic, speak with your doctor or pharmacist for further advice.
How to store ampicillin
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.
If you have been given liquid medicine, store it in a refrigerator. It will have been made up by the pharmacy and lasts for seven days, so check the expiry date on the bottle and do not use it after this date.
Información importante sobre todos los medicamentos
Información importante sobre todos los medicamentos
Nunca tome más de la dosis prescrita. Si sospecha que usted u otra persona podría haber tomado una sobredosis de este medicamento, acuda de inmediato al departamento de accidentes y emergencias de su hospital local. Lleve el envase con usted, incluso si está vacío.
Este medicamento es para ti. Nunca lo des a otras personas, incluso si su condición parece ser la misma que la tuya.
Si compras algún medicamento, consulta con un farmacéutico que sea seguro tomarlo junto con tus otros medicamentos.
Si vas a someterte a una operación o a un tratamiento dental, informa a la persona que realiza el tratamiento sobre los medicamentos que estás tomando.
No guardes medicamentos caducados o no deseados. Llévalos a tu farmacia local, que se encargará de desecharlos por ti.
Si tienes alguna pregunta sobre este medicamento, consulta a tu farmacéutico.
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 should I do if I get thrush while taking ampicillin?
Some people develop redness and itching in the mouth or vagina (thrush) after taking antibiotics. If this happens to you, speak with your doctor or pharmacist for advice.
Does ampicillin affect birth control pills?
If you are taking the contraceptive 'pill' at the same time as this antibiotic, its effectiveness can be reduced if you experience vomiting or diarrhoea that lasts for more than 24 hours. In such cases, ask your doctor or pharmacist for advice on additional contraceptive precautions to use. However, for sickness or diarrhoea lasting less than 24 hours, no additional precautions are needed.
Can ampicillin interact with vaccines?
Ampicillin can prevent the oral typhoid vaccine from working correctly. If you are scheduled for any vaccinations, it's important to inform the person treating you that you are taking this antibiotic.
What are the signs of a severe allergic reaction to ampicillin?
Important signs of a penicillin allergy include an itchy rash, swelling in the face or mouth, or difficulty breathing. If you experience any of these symptoms, you must stop taking the medicine immediately and speak with your doctor or go to your local accident and emergency department.
How should I dispose of old or unused ampicillin?
No debes conservar medicamentos caducados o no deseados. Llévalos a tu farmacia local, que se encargará de desecharlos de manera segura por ti.
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: 10 Mar 2028
11 Mar 2025 | Última versión

Pregunta, comparte, conecta.
Navega por discusiones, haz preguntas y comparte experiencias en cientos de temas de salud.
Suscríbete al boletín de Patient
Tu dosis semanal de consejos de salud claros y confiables, escritos para ayudarte a sentirte informado, seguro y en control.
Al suscribirte aceptas nuestros Política de Privacidad. Puedes darte de baja en cualquier momento. Nunca vendemos tus datos.
Más en medicina para el tratamiento de infecciones
- Co-amoxiclav para infecciones
- Co-trimoxazol para infección
- Tabletas de cobicistat para el VIH
- Econazol para infecciones fúngicas de la piel y las uñas
- Emtricitabina para VIH
- Gotas para los ojos de ácido fusídico
- Gotas para los ojos de gentamicina
- Champú de ketoconazol
- Cápsulas de limeciclina
- Miconazol para la candidiasis vaginal
- Molnupiravir para la enfermedad de COVID-19
- Moxifloxacino para infecciones oculares
- Nitrofurantoína para infecciones urinarias
- Cápsulas y suspensión de oseltamivir
- Tabletas de oxitetraciclina
- Posaconazol para infecciones fúngicas
- Proguanil con atovacuona para la prevención de la malaria
- Crema de sulfadiazina de plata para infecciones de la piel
- Trimetoprima para infecciones
- Zanamivir