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Metronidazole - Antibacterial STI Treatment

Following a recent review by our clinical team, our doctors do not consider it appropriate to supply this treatment via an online consultation only. If you are seeking this or similar medication, we advise you to make an appointment with your regular doctor who can properly assess your suitability for treatment.

The active ingredient metronidazole is an antibiotic used to treat infections caused by anaerob bacteria (bacteria who do not need oxygen to grow and survive) or protozotes. This makes the drug particularly suitable for the treatment of infections of the internal organs, for example, the gut. It is also often administered after gynecological surgery.
The tablets are either taken as a powerful one-off dose or as a seven day course. At Myonlinedoctor, metronidazole can be prescribed for the treatment of bacterial vaginosis or trichomoniasis, two common infections affecting the genitalia.

Please note: broad spectrum antibiotics can compromise the effectiveness of certain hormonal contraceptives. To prevent pregancy during treatment, please use alternative means of contraception, preferrably a barrier method such as condoms or abstinance, during treatment and for seven days after treatment is finished. If you take metronidazole to cure an STI, you should not have unprotected sex until you get the all clear confirmed. It is also important that your sexual partner gets treated at the same time as a precautionary measure to avoid the infection being passed back and forth between you.

Metronidazole Dosage Regimes

7 Day Course:

The usual dose is 400 mg twice a day for seven days.

One-off Dose:

A total of 2 milligrams is administered in one go.

Unsuitable patients

Before taking metronidazole make sure your doctor or pharmacist knows:

  • If you are pregnant, trying for a baby or breast-feeding
  • If you suffer from liver or kidney problems
  • If you suffer from a condition called porphyria (a blood disorder)
  • If you have a dependency on alcohol

Metronidazole Side Effects

Any medication can have potential side effects, however not everybody is affected and it is impossible to predict if you will experience side effects or not. Below you will find a list of the most common side effects of this medicine. The full information can be found in the patient leaflet that comes with each box. For further information, or if you experience any adverse reaction, please contact your doctor or pharmacist.

  • Gut problems such as diarrhoea, constipation, nausea, vomiting or abdominal pain
  • Furry tongue
  • Drowsiness
  • Dizziness
  • Headache
  • Skin rashes
  • Muscle and joint pain
  • Darkening of the urine

Note:If you've requested this treatment in the last three months and you think you need a second course of treatment, please contact us prior to ordering.