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Metronidazole 400mg - 21 Tablets

£39.99
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EC41009
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Metronidazole

What is Metronidazole?

Metronidazole 400mg tablets (also referred in this information as Metronidazole) is an effective clinical antibiotic that belongs to a group of medications called anti-infective agents.

Metronidazole may be used to treat mouth and dental infections caused by bacteria such as ulcerative gingivitis, wisdom tooth infection or dental abscesses. Metronidazole can also be used in the treatment of bacterial infections occurring after surgery alongside a multitude of conditions. These include infections in the stomach, blood, brain and pelvic area.

For further information on Metronidazole, please see the Patient Information Leaflet here.

How it works

Metronidazole, like all anti-infective agents, works by stopping the growth and spread of the bacteria causing oral infections. While taking antibiotics, it is important to always finish the entire course of Metronidazole for as long as your doctor has prescribed. Even if you feel better, you will be at an increased risk of re-occurring infection if treatment is finished prematurely.

With serious swelling of dental infections, the medicine should be working within a few days; It may take longer, up to a week, before the symptoms significantly improve.

It is recommended to take another test around 3 months after treatment is completed and to abstain from sex until completing the course of treatment. This is because young adults who were tested positive for chlamydia had an increased risk of catching it again.

Before you take it

Most healthy adults and adolescents can take Metronidazole. However, there are some circumstances where Metronidazole is unsuitable to treat an infected dental abscess.

It is important for your own health and safety that if you already suffer symptoms of an allergic reaction related to Metronidazole, other antibiotics, or any other ingredient in this medicine, you should talk to your doctor or pharmacist first before taking this medication.

We do not prescribe any medications to people under 18 years old.

Metronidazole is unsuitable for some patients. You should contact your doctor or healthcare professional if any of the following apply:

  • You have a kidney disease or require dialysis treatment
  • Have or have had a form of liver disease
  • Are during pregnancy
  • Have an intolerance to lactose
  • Have epilepsy or have before had a fit
  • Have porphyria (a genetic disease that can cause skin blisters, abdominal pain and brain/nervous system disorders)
  • Have any disorder of the blood or blood cells

Metronidazole should not be used if you have been taking other medicines. Some of these include medicines to stop the blood from clotting such as Warfarin, lithium, disulfiram, cimetidine and oestrogen contraceptives that also known as ‘the pill’.

For a full list of medications and conditions, please see our Patient Information Leaflet here.

Dosage Instructions

It is important to make sure you follow the instructions given by your prescriber. Do not crush metronidazole tablets and take whole with water only. Tablets can be taken with food.

Adults and adolescents over the age of 10 for an infection of the gums: 200 mg, three times a day for 3 days.

Adults and children over the age of 10 for an infection of the tooth: 200 mg, three times a day for 3-7 days.

You are advised not to drink alcohol while taking this medicine and for 48 hours after completing treatment. If you drink alcohol while taking Metronidazole, you may have some possible side effects such as feeling or being sick, stomach pain, hot flushes, palpitations and headache.

Common Side Effects of Metronidazole

Metronidazole tablets can cause side effects, particularly when you first start taking it, although not everybody gets them.

Possible but less serious side effects of the Metronidazole are:

  • A headache
  • Unpleasant taste in the mouth
  • Furring of the tongue

In case of severe side effects, stop taking treatment and call a doctor for symptoms such as:

  • Dizziness
  • Being sick or vomiting
  • Blurred vision, double vision or short sightedness
  • Encephalopathy (headaches, light sensitivity, confusion or fever)
  • Slow or slurred speech
  • Abdominal pain

It is possible that you are allergic to some of the ingredients in this medication. Please tell your doctor at once if you show signs of having an allergic reaction such as:

  • Skin rash or blistering of the skin
  • Problems breathing
  • High fever or temperature
  • Inflammation of the legs, arms, face, lips, throat, or tongue
  • Increased heart rate or palpitations
  • Confusion or anxiety

If you are experiencing an allergic reaction, stop using Metronidazole and tell your doctor right away.



Frequently Asked Questions (FAQs)


Is Metronidazole suitable for Children?

Metronidazole is only available for children over the age of 10. We do not prescribe any medication to anyone under the age of 18.

Do I need a prescription?

Yes. Metronidazole is available through prescription on our website.

I’m pregnant. Can I use Metronidazole?

Consult your doctor first before using this medication during pregnancy as it can be harmful to an unborn child. This treatment isn’t usually recommended for pregnant or breastfeeding women as it has been recorded that antibiotics can cross into breast milk while taking Metronidazole.

What happens if I miss a dose?

If you forget to take your prescribed dose at the right time, take your recommended amount of medicine as soon as you remember. If it is close to your next dose, skip the last missed dose and your take treatment when it’s time to use your again to continue with your regular treatment. Never double dose to make up for a missed or forgotten dose.

Medicine should not be stopped until you have finished the course prescribed by your doctor to prevent the risk of infection returning. It is possible for the infection to come back if you forget your treatment often or if you stop it earlier than prescribed.

What happens if I take too much?

It is important to never increase or decrease the dosage unless your doctor has told you to do so. Always use this medication closely in accordance with your prescription. If you have accidentally taken more than intended or than what is recommended, please contact your doctor.

If you do not seem to be getting better, you should check with your doctor to ensure you are being given the correct dosage and treatment. Your doctor may need to change your dosage or alter medication.

More Information
Dosage 400mg
Dosage Instructions Take ONE tablet THREE times a day for SEVEN days.