Amoxicillin for infections
Revisado por pares por Sid DajaniÚltima actualización por Michael Stewart, MRPharmSLast updated 11 Mar 2025
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Amoxicillin is a type of penicillin - do not take it if you are allergic to penicillin. Make sure you tell your doctor 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 can take amoxicillin either before or after food.
Common side effects include nausea, vomiting, diarrhoea, and thrush.
If you have an allergic reaction (such as any swelling around your mouth, any difficulties breathing or a red rash) contact a doctor for advice straightaway.
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Video picks for Medicamentos para el tratamiento de infecciones
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About amoxicillin
Tipo de medicamento | A penicillin antibiotic |
Usado para | Bacterial infections (in adults and children) |
Disponible como | Capsules, oral liquid medicine, soluble tablets, sachets of powder and injections |
What is amoxicillin used for?
Volver al contenidoAmoxicillin is a type of penicillin antibiotic used to treat bacterial infections including; sinus and infecciones respiratorias, urine infections, recurrentes, and some dental infections.
You may also be prescribed amoxicillin to prevent an infection from occurring if you are at particular risk of getting an infection.
Amoxicillin is sometimes used to get rid of Helicobacter pylori. This is an infection often found in people with stomach ulcers. If you are prescribed amoxicillin for this reason, you will also be prescribed other medicines to take alongside it.
Amoxicillin works by killing the germs (bacteria) responsible for the infection.
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Side effects of amoxicillin
Volver al contenidoThe most common side effects of amoxicillin are:
Sentirse mal (náuseas).
Estar enfermo (vómitos).
Diarrea.
Candidiasis.
Erupción.
You will find a full list in the manufacturer's information leaflet supplied with your medicine.
Los efectos no deseados a menudo mejoran a medida que su cuerpo se adapta al nuevo medicamento, pero hable con su médico o farmacéutico si alguno de los siguientes persiste o se vuelve problemático.
How to manage amoxicillin side effects
Volver al contenidoCommon amoxicillin side effects (these affect fewer than 1 in 10 people) | ¿Qué puedo hacer si experimento esto? |
Feeling sick or being sick | Stick to simple foods. Try taking your doses of amoxicillin with something to eat if you are not already doing so |
Diarrea | Drink plenty of water to replace any lost fluids. If the diarrhoea continues, becomes severe, or contains blood, let your doctor know 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, call your doctor or pharmacist for further medical advice.
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Who should not take amoxicillin?
Volver al contenidoSome 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 amoxicillin 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 for example trouble breathing.
If you have any problems with the way your kidneys work for example kidney disease.
If you are pregnant or breastfeeding. Amoxicillin 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 amoxicillin
Volver al contenidoBefore you start the amoxicillin treatment, read the manufacturer's printed information leaflet from inside the pack. It will give you more information about amoxicillin and will provide you with a full list of the side effects you may experience from taking amoxicillin.
Take amoxicillin exactly as your doctor tells you to. It is usually taken three times daily, every eight hours. Your dose will be different to this if you are being treated with sachets of amoxicillin powder, or if you are taking amoxicillin to treat a stomach ulcer.
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 amoxicillin doses evenly during the day.
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.
You can take amoxicillin either with or without food. The amoxicillin capsules should be swallowed whole with a drink of water.
If you have been supplied amoxicillin oral powder sachets, stir the powder from the sachet into 10-20 ml of water. Drink the solution as soon as possible after mixing it.
If you forget to take a dose of amoxicillin at the correct time, take one as soon as you remember. Try to take the correct number of doses each day, leaving at least four hours between doses. Do not take two doses of amoxicillin at the same time to make up for a missed dose.
Obteniendo el máximo de tu tratamiento
Volver al contenidoIf you (or your child) have been prescribed the oral liquid amoxicillin medicine, you may find that it causes some staining of the teeth. Brushing the teeth regularly helps to prevent this. Any staining usually disappears soon after the course of antibiotics is finished.
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 birth control like 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 following few days.
There is no need to use additional precautions for any bouts of sickness or diarrhoea which last for less than 24 hours.
Amoxicillin can stop the oral typhoid vaccine from working so if you are due to have any vaccinations, make sure the person treating you knows that you are taking this antibiotic.
How to store amoxicillin
Volver al contenidoMantenga 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, this will have been made up by the pharmacy and lasts for 14 days. Make sure you check the expiry date on the bottle and do not use it after this date.
Información importante sobre todos los medicamentos
Volver al contenidoInformación 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 Yellow Card website.
Preguntas frecuentes
Volver al contenidoCan you drink alcohol with amoxicillin?
You can usually drink alcohol in moderation while taking amoxicillin, as it does not interact directly with the medicine. However, alcohol can make side effects such as nausea, dizziness, and stomach upset more likely, and may slow your recovery. If you are feeling unwell, it is generally best to avoid alcohol until you are better.
Can you take paracetamol with amoxicillin?
Yes, you can take paracetamol with amoxicillin. The two medicines do not interact, and paracetamol can help relieve fever or pain while the antibiotic treats the infection. Always follow the dosing instructions on the label or from your doctor.
Can amoxicillin make you tired?
Amoxicillin itself does not usually cause tiredness, but some people do feel more fatigued while taking it. This is often due to the infection your body is fighting rather than the antibiotic.
Does amoxicillin treat UTIs?
Amoxicillin can be used to treat some urinary tract infections, but it is not always the first choice. Many UTIs are caused by bacteria that are resistant to amoxicillin, so doctors often prescribe other antibiotics instead. A urine test is usually needed to confirm the best treatment.

¿Inseguro sobre mezclar medicamentos?
Verifica posibles interacciones entre medicamentos, suplementos y alimentos antes de tomarlos juntos.
Lecturas adicionales y referencias
- Manufacturer's PIL, Amoxicillin Capsules 250 mg and 500 mg; Aurobindo Pharma - Milpharm Ltd, The electronic Medicines Compendium. Dated March 2024.
- Manufacturer's PIL, Amoxicillin 125 mg/5 ml Oral Suspension Sugar Free BP; Brown & Burk UK Ltd, The electronic Medicines Compendium. Dated February 2023.
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Historial del artículo
La información en esta página está escrita y revisada por pares por clínicos calificados.
Próxima revisión: 10 Mar 2028
11 Mar 2025 | Última versión

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