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Norfloxacin tablets for infection

Clinical author's note Michael Stewart 30/04/2020:At the time of review there are no branded or generic products containing norfloxacin available in the UK. Norfloxacin may still be available in other countries. This medicine leaflet is based on medical information available in the UK at the time of writing and is left here for reference purposes. Please also refer to the manufacturer's information supplied with your medicine.

Norfloxacin is given to treat urine infections.

It is important to complete the full course of treatment. This is to prevent the infection from coming back.

The most common side-effects are feeling sick (nausea), diarrhoea, feeling dizzy and headache.

Norfloxacin may impair your alertness, so make sure your reactions are normal before you drive and before you use tools or machines.

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About norfloxacin

Tipo de medicamento

A quinolone antibiotic

Utilizado para

Treatment of urinary tract infections

Disponible como

Tablets (discontinued)

Norfloxacin is given to treat urinary tract infections, such as cystitis and chronic prostatitis. It works by killing the bacteria which are the cause of the infection.

Before taking norfloxacin

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 norfloxacin it is important that your doctor knows:

  • Si está embarazada, esperando un bebé o en período de lactancia.

  • Si es menor de 18 años.

  • If you have ever experienced a problem with your tendons after taking another quinolone antibiotic (these are called ofloxacin, levofloxacin, ciprofloxacin, moxifloxacin, and nalidixic acid).

  • Si tiene algún problema con el funcionamiento de sus riñones.

  • If you have epilepsy or any other condition that causes fits.

  • If you have a heart condition, or if you have been told you have an unusual heartbeat.

  • If you have a condition causing tired and weak muscles, called myasthenia gravis.

  • If you know you have glucose 6-phosphate dehydrogenase (G6PD) deficiency. This is a genetic disorder which causes problems after eating foods such as fava beans.

  • 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 norfloxacin

  • Before you start taking the tablets, read the manufacturer's printed information leaflet from inside the pack. The manufacturer's leaflet will give you more information about norfloxacin and a full list of the side-effects which you may experience from taking it.

  • Take norfloxacin exactly as your doctor tells you to. The usual dose is one 400 mg tablet, taken twice a day. Swallow the tablet with a drink of water.

  • You should take the tablets when your stomach is empty, which means taking them one hour before any food, or waiting until two hours afterwards. This is because your body absorbs less norfloxacin after a meal, which means the medicine is less effective.

  • Try to space out the doses over the day - so ideally, take a dose every 12 hours.

  • Do not drink milk or take indigestion remedies or medicines containing iron or zinc (such as multivitamin tablets) during the two hours before you take norfloxacin, or during the two hours after you have taken a dose. This is because these things interfere with the way norfloxacin is absorbed by your body, and stop it from working fully.

  • If you forget to take a dose, take it as soon as you remember unless your next dose is due. If your next dose is due then take the dose which is due but leave out the forgotten one. Do not take two tablets together to make up for a missed dose.

  • Even if you feel your infection has cleared up, keep taking the antibiotic until the course is finished (unless you are told to stop by your doctor). This is to prevent the infection from coming back. A course of treatment usually lasts for 7-10 days, although it may be for a shorter time than this if you are a woman. If you have a long-term (chronic) infection, your course of treatment will be for longer than this, possibly for 1-3 months. If you still feel unwell after finishing the course of tablets, go back to see your doctor.

Aproveche al máximo su tratamiento

  • Remember to keep any routine appointments with your doctor. This is so your progress can be monitored.

  • Norfloxacin may cause your skin to become more sensitive to sunlight than normal. Protect your skin by using a sunscreen, particularly if you are exposed to strong sunlight for a prolonged period of time. Do not use sunbeds.

  • If you buy any medicines check with a pharmacist that they are safe to take with this antibiotic. In particular, do not take painkillers called non-steroidal anti-inflammatory drugs (NSAIDs), such as ibuprofen, while you are taking norfloxacin.

  • Some people develop thrush (redness and itching in the mouth or vagina) after taking a course of antibiotics. If you think you have thrush, 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.

  • Norfloxacin may make you feel light-headed and impair your ability to concentrate. Make sure your reactions are normal before you drive, operate machinery or do any other jobs which could be dangerous if you are not sufficiently alert.

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Can norfloxacin 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 norfloxacin. 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

norfloxacin side-effects


¿Qué puedo hacer si me ocurre esto?

Feeling sick (nausea) or being sick (vomiting), indigestion, tummy (abdominal) pain

Coma alimentos sencillos: evite las comidas ricas o picantes.

Diarrea

Drink plenty of water to replace lost fluids. If the diarrhoea is severe or continues to be a problem, speak with your pharmacist or doctor for advice

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.

Sensación de mareo

No conduzca ni utilice herramientas o máquinas hasta que se sienta bien de nuevo.

Erupción

If this is severe, let your doctor know

Important: there are also a number of less common but more serious side-effects which have been associated with norfloxacin. Speak with your doctor as soon as possible if you experience the following:

  • An allergic-type reaction, such as swelling around your face or mouth, a skin rash, or any difficulty breathing.

  • Pain or swelling in your joints.

  • Problems with your vision or with your eyes.

Si experimenta cualquier otro síntoma que crea que puede deberse a los comprimidos, consulte a su médico o farmacéutico.

How to store norfloxacin

  • 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.

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

Historia del artículo

La información de esta página ha sido redactada y revisada por médicos cualificados.

  • Fecha prevista para la próxima revisión: 4 de mayo de 2026
  • 9 de mayo de 2023 | Última versión

    Última actualización

    Michael Stewart, MRPharmS

    Revisado por expertos

    Sid Dajani
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