Azitromicina para la infección
Zithromax
Peer reviewed by Sid DajaniLast updated by Michael Stewart, MRPharmSLast updated 22 May 2023
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Azithromycin is a macrolide antibiotic. It can be taken by people who are allergic to penicillin.
It is important to complete the prescribed course (unless you are told to stop). Otherwise your infection could come back.
Any side-effects are usually mild. The most common are diarrhoea, feeling sick (nausea) and headache.
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About azithromycin
Tipo de medicamento | A macrolide antibiotic |
Utilizado para | Bacterial infections |
También llamado | Zithromax® |
Disponible como | Tablets, capsules, oral liquid medicine and eye drops |
Azithromycin is prescribed to treat acute bacterial infections, such as respiratory infections, ear infections, skin infections and some genital infections. It can be taken by adults and children. It works by stopping the bacteria causing the infection from multiplying.
Azithromycin is also available as an eye drop for the treatment of eye infections. For more information on this use, see the leaflet Azithromycin eye drops.
Before taking azithromycin
Some medicines are not suitable for people with certain conditions, and sometimes a medicine may only be used if extra care is taken. For these reasons, before you start taking azithromycin it is important that your doctor or pharmacist knows:
Si está embarazada o en periodo de lactancia.
Si tiene algún problema con el funcionamiento del hígado o de los riñones.
If you know you have an unusual heart rhythm.
If you have a muscle disorder called myasthenia gravis.
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.
Si alguna vez ha tenido una reacción alérgica a un medicamento.
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How to take azithromycin
Before you start taking the antibiotic, read the manufacturer's printed information leaflet from inside the pack. It will give you more information about azithromycin and provide a full list of the side-effects which you may experience from taking it.
Take azithromycin exactly as your doctor tells you to. It is taken once a day. Depending upon the reason why you are taking it, you may only need to take a single dose or you may be given a course for 3-5 days. Your doctor or pharmacist will tell you which is right for you. The directions will also be on the label of the pack to remind you.
When azithromycin is prescribed for a child, the dose will depend upon the child's weight. Make sure you read the label carefully so that you measure out the correct amount of medicine. For younger children, you will be given an oral dosing syringe to measure out the medicine - if you are not sure how to use this, ask your pharmacist to show you. It is a good idea to offer your child a drink of fruit juice after taking azithromycin, as the medicine can have a slightly bitter aftertaste.
If you are taking azithromycin capsules, you should take your doses when your stomach is empty. This means taking them one hour before any food, or waiting until two hours afterwards. If you are taking tablets or liquid medicine, these can be taken either before or after food.
If you forget to take a dose, take it as soon as you remember but do not take two doses at the same time.
Even if you feel your infection has cleared up, keep taking the antibiotic until the course is finished (unless your doctor tells you otherwise). This is to prevent the infection from coming back and being more difficult to treat.
Aproveche al máximo su tratamiento
If you are also taking an antacid for indigestion, it can increase the time it takes for azithromycin to be absorbed by your body. Because of this, it is recommended that you do not take indigestion remedies during the two hours before or during the two hours after you take a dose of azithromycin.
Some people develop thrush (redness and itchiness in the mouth or vagina) after taking a course of antibiotics. If this happens to you, speak with your doctor or pharmacist for advice.
Este antibiótico puede impedir que actúe la vacuna oral contra la fiebre tifoidea. Si se va a vacunar, asegúrese de que la persona que le trata sabe que está tomando este medicamento.
If you are having an operation or dental treatment, tell the person carrying out the treatment that you are taking azithromycin.
If you buy any medicines, check with a pharmacist that they are suitable to take with this antibiotic.
If you still feel unwell after completing your course of the antibiotic, make another appointment to see your doctor.
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Can azithromycin 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 azithromycin. 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.
Común azithromycin side-effects | ¿Qué puedo hacer si me ocurre esto? |
Diarrea | Drink plenty of water to replace lost fluids. If the diarrhoea continues or is severe, speak with your doctor as soon as possible |
Feeling sick (nausea) or being sick (vomiting), stomach ache, wind (flatulence) | Stick to simple meals - avoid rich or spicy food |
Dolor de cabeza | Bebe mucha agua y pide a tu farmacéutico que te recomiende un analgésico adecuado. Si los dolores de cabeza persisten, informe a su médico. |
Lack of appetite, a feeling of deafness | En caso de molestias, hable con su médico |
Si experimenta cualquier otro síntoma que considere que puede deberse a este medicamento, consulte a su médico o farmacéutico.
How to store azithromycin
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.
If you have been given liquid medicine, it will have been made up by the pharmacy and it lasts for a limited number of days only. 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
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 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.
Informar de los efectos secundarios de un medicamento o vacuna
Si experimenta efectos secundarios, puede notificarlos en línea a través del sitio web de la Tarjeta Amarilla.
Lecturas complementarias y referencias
- Manufacturer's PIL, Zithromax® 250 mg Capsules; Pfizer Limited, The electronic Medicines Compendium. Dated March 2022.
- Manufacturer's PIL, Zithromax® Powder for Oral Suspension; Pfizer Limited, The electronic Medicines Compendium. Dated March 2022.
- 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.
Next review due: 21 May 2026
22 May 2023 | Latest version

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