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How to order
  1. Click on the green "Start Order" button.
  2. Fill in our short consultation form.
  3. Choose delivery method and mode of payment.
  4. Our team of expert prescribers will assess whether medication is suitable.
  5. If you get the green light and it is deemed suitable, your order will be processed quickly and efficiently.
Confidential Service

Your privacy is important, Prescription Doctor are committed to keeping your details completely confidential.

This is why we also take steps to conceal your prescription products under two layers of packaging.

Delivery and Packing
Discreet Delivery?

We have a commitment to delivering a discreet service and understand your need for privacy. We ship all orders via a trackable courier using discreet, plain packaging.

Do I Need to Wait in All Day for Delivery?

Once your order is dispatched you will receive a tracking number via sms and email.

Do You Deliver on Weekends?

We deliver medications between Monday and Saturday. You can upgrade to Saturday delivery on Friday.

My Order Hasn’t Arrived What Should I Do?

You should receive a tracking number with your order which you can use this number to track your parcel online. This should give you a clear indication of where your parcel is. If you haven’t received your parcel in the time frame given by our couriers, contact your local depot to find out where it is. You can also contact our support team who will do this for you.

Can I Be Notified by Text?

On checkout you will be asked to leave your mobile number so our courier can text you about the delivery. This is also useful if the courier has problems finding your address. We will not use your mobile number for anything else.

Payment Methods
How Can I Pay for My Order?

You can pay for your order using credit, debit card or via bank transfer.

I Don’t Have a Credit Card, How Can I Pay?

If you don’t have a credit or debit card you can pay via bank transfer. We will give you a unique reference number at checkout along with details of how to make the transfer. Once the money has cleared in our account, we will process your order.

How Do You Keep My Details Safe?

We are a completely secure site and take many measures to ensure your details are kept safe. We understand that you have a right to extreme privacy when purchasing sensitive health medications. All information that you provide to us is stored on our secure servers. Any payment transactions will be encrypted using SSL technology.

Payment and refunds?

You can pay for your order using credit, debit card and bank transfer.

Card Payment: Please notify us that you wish to cancel your order. Your refund will show available In 1 - 3 days.

Bank Transfer: A member of our team will contact you requesting for your bank details. These details are only used to transfer the funds back into your account.

About Product
Mohamed Imran Lakhi
This content has been written and checked for quality and accuracy by
Mohamed Imran Lakhi Content Administrator GPhC: 2060586 Updated on: 30/03/2021 Next review: 30/09/2021

What is Metronidazole?

Metronidazole is an antibiotic used to treat a number of bacterial infections including tooth infections and bacterial vaginosis. It comes in the form of oral tablets or a topical vaginal gel called Zidoval.

The antibiotic, Metronidazole, is also the active ingredient of some rosacea treatments such as Rozex and Metrogel.

When taking any course of antibiotics, it is important to complete the course of treatment, even if you feel better or the infection has cleared. Stopping Metronidazole too early can cause your infection to return.

The amount of Metronidazole you take and how long you take it for depends on the severity of your infection and the administrative route of the medicine. Always follow the doctor's instructions when taking antibiotics.

Buy Metronidazole Online for Bacterial Vaginosis

With Prescription Doctor's convenient online prescription service, you can buy Metronidazole 400mg online without needing to visit your doctor or waiting in line at a pharmacy.

To begin your order, complete our short online medical form for our doctor to review. If our doctor approves your order before 3pm Monday to Friday, our UK based pharmacy will dispense and dispatch your item the same day for a next-day delivery.

All items are dispatched from our UK pharmacy in discreet packaging, which gives no indication of its content or where it came from.

What is Bacterial Vaginosis?

Bacterial Vaginosis (BV) is a vaginal infection which affects 1 in 3 women in the UK. While it is not classed as an STI, the infection can be triggered by sexual intercourse and even passed on from one woman to another during sex.

What causes bacterial vaginosis?

There are a number of potential causes of BV, including:

  • using perfumed products in and around the vagina
  • changing sexual partners
  • change in vaginal pH brought on by periods
  • using strong detergents when washing underwear
  • using a form of contraception known as an IUD

Is bacterial vaginosis the same as thrush?

BV is often mistaken for thrush due to the similarities in the symptoms of both infections.

The difference between the two conditions lies in the consistency and odour of vaginal discharge. While thrush often produces a thick, odourless discharge which looks like cottage cheese, the discharge associated with bacterial vaginosis is often thin, watery and foul or fishy smelling.

If you notice a change in your vaginal discharge, speak to your doctor or a pharmacist for advice.

How does Metronidazole work?

Metronidazole is an antibiotic which kills bacteria by altering its DNA.

This inhibits the cells' ability to reproduce, stopping the infection from spreading and giving the immune system a better chance of fighting the infection.

Metronidazole is only effective against bacteria which do not require oxygen to survive, also referred to as anaerobic bacteria.

How long does Metronidazole take to work?

Depending on the formulation, severity of infection and many other factors about the patient, it can take between 3 and 14 days.

Most courses of Metronidazole 400mg treatment last for a week (7 days).

The doctor will determine how long you should take Metronidazole 400mg for in order to clear the infection.

How do I take Metronidazole?

Metronidazole comes in three formulations: capsules, tablets and vaginal gel. The form of the treatment depends on the severity of the infection.

For the treatment of bacterial vaginosis, take one 400mg tablet twice a day for 7 days.

It is important to take Metronidazole as prescribed by your doctor. This means remembering to take Metronidazole at the same time every day for the duration of the treatment.

If you often forget when to take your medicine, set a reminder on your phone or store your medicine in a place which will jog your memory.

If you are not sure how to take Metronidazole, read the enclosed patient information leaflet or speak to your doctor or pharmacist.

It is vital to complete the course of Metronidazole 400mg you have been prescribed to prevent the infection from coming back.

Instructions on how to take Metronidazole for BV can be found within the leaflet enclosed with your medicine. You should always read this leaflet before taking Metronidazole. Always retain the leaflet in case you need to refer to it again in the future.


Swallow each capsule whole with a glass of water.

Metronidazole capsules can be taken with or without food.

Do not break open the capsule.

If you have difficulty swallowing capsules, speak to your doctor or a pharmacist about alternative treatments.


Swallow each 400mg tablet whole with a glass of water.

Take Metronidazole tablets without food.

Do not crush or chew the tablet.

If you have trouble taking tablets, speak to your doctor or a pharmacist about alternative treatments.

Vaginal gel

Vaginal gel is applied internally into the vagina using the provided applicator.

Fill the applicator to the indicated line with the gel. Insert the applicator into the vagina while gently removing the applicator, dispense the Metronidazole gel into your vagina.

What should I do if I forget to take Metronidazole?

If you forget to take Metronidazole 400mg, take it as soon as you remember.

If it is near the time of your next dose, skip the missed dose and continue taking Metronidazole as you normally would.

To help you remember when to take your next dose of Metronidazole, put your medicine in a place where you are most likely to remember it, or a place where you will see it to prompt you to take it.

Alternatively, you could set a reminder on your phone or smart device which will prompt you near the time of your next dose of Metronidazole.

What if I take too much Metronidazole?

If you accidentally take more Metronidazole 400mg than you should, speak to your doctor immediately or visit your nearest hospital's casualty department.

Symptoms of Metronidazole overdose include:

  • Vomiting
  • Loss of appetite
  • Diarrhoea
  • Metallic taste
  • Headache
  • Nausea
  • Changes in sleeping patterns (insomnia or drowsiness)

Metronidazole side effects and cautions

How will I know if Metronidazole 400mg is safe for me?

Metronidazole is not suitable for everyone. Before you buy Metronidazole online, speak to your doctor or a pharmacist to ensure it is safe for you to take. 

By filling out our confidential medical questionnaire, our prescribers will be able to determine whether Metronidazole is safe for you.

When you order metronidazole online from Prescription Doctor, it is important to inform our doctor of all medications you are taking, including medicines prescribed by your GP or bought over the counter from pharmacies, as well as health and herbal supplements.

Do not take Metronidazole if you are allergic to any of its ingredients listed in the patient information leaflet.

Speak to your doctor before using Metronidazole if you:

  • are on dialysis
  • are pregnant or breastfeeding
  • have liver problems
  • suspect you have vaginal thrush
  • will not be able to stop drinking alcohol while using Metronidazole

Side effects of Metronidazole

Metronidazole has the potential of causing side effects, though not everybody gets them. Understanding the risks associated with the medicine, and remaining vigilant of any side effects, is an essential part of your treatment.

Common side effects of Metronidazole may include:

  • Diarrhoea
  • Metallic taste
  • Nausea
  • Vomiting

If you notice any of the side effects listed below, speak to your doctor as soon as possible.

  • Bleeding gums
  • Bruising
  • Fatigue
  • Stomach pain which radiates to your back (pancreatitis)
  • Ulcers in the mouth
  • Unexpected infections
  • Yellowing of the skin and eyes (jaundice)

Very rare side effects of Metronidazole may include:

  • Darkening of urine
  • Dizziness
  • Fits (convulsions)
  • Hallucinations
  • Headache
  • Liver problems
  • Muscle and join pain
  • Rash
  • Sleepiness

This is not an exhaustive list of side effects to Metronidazole. For the complete list of side effects, consult the patient information leaflet which is enclosed with your medicine.

You should retain the leaflet in case you need to read it again in the future.

You can view the patient information leaflet for Metronidazole online as a PDF, which you can download or print off for future reference.

How can I report my side effects?

If you experience any side effects of metronidazole 400mg, report them to your doctor straight away. Consider speaking to a pharmacist for advice on how to manage your side effects.

How long do side effects of Metronidazole last?

Side effects should disappear after 1 day of finishing your course of Metronidazole.

If your side effects persist for longer or are particularly bothersome, seek advice from your doctor as soon as possible.

Allergic reaction

Do not take Metronidazole if you are allergic to metronidazole or any of its other ingredients listed in the patient information leaflet.

If you notice the signs and symptoms of an allergic reaction, stop taking Metronidazole and speak to your doctor or go straight to your nearest hospital. Remember to take the packaging and any remaining medicine with you so that doctors know exactly what you have taken.

Signs of an allergic reaction include:

  • Blue skin or lips
  • Collapse or loss of consciousness
  • Difficulty breathing
  • Dizziness and confusion
  • Rash
  • Stomach pain
  • Swelling of the face, lips, tongue and throat
  • Tightness of the chest

Pregnancy and breastfeeding

Do not take Metronidazole if you are pregnant, think you might be pregnant, or breastfeeding.

If you become pregnant while taking Metronidazole, speak to your doctor as soon as possible for further advice.

Other safety information

Always seek your doctor's advice before you buy Metronidazole 400mg online.

Do not take Metronidazole past the expiry date printed on the packaging. The date refers to the last day of the indicated month.

Do not throw away medicine via household or water waste. Take any unwanted or expired medication to your local pharmacy and ask them to dispose of it safely on your behalf.

Always keep your medicine out of the sight and reach of children and pets.

Never share your medicine with other people, even if they are experiencing the same symptoms or have been diagnosed with the same condition as you.

Frequently asked questions about Metronidazole

What if I stop taking Metronidazole?

You should not stop taking Metronidazole unless your doctor has instructed that it is safe to do so.

Antibiotics, such as Metronidazole, should not be stopped early. Stopping antibiotic treatment early may cause the infection to return.

Always complete your course of antibiotics unless your doctor has instructed you otherwise.

Can I drink alcohol while taking Metronidazole?

No, you should not drink alcohol while treating an infection with Metronidazole.

Alcohol can lower the effectiveness of Metronidazole and increase the risk of adverse side effects, such as dizziness, drowsiness and nausea.

How long will I have to avoid alcohol for while taking Metronidazole?

Drinking alcohol while taking antibiotics can lower their effectiveness. You should avoid alcoholic drinks and mouthwash while taking Metronidazole.

You will be able to drink alcohol once 48 hours has passed since your final dose of Metronidazole.

Can I buy Metronidazole over the counter in the UK?

Metronidazole is a prescription-only medicine and cannot be bought over the counter.

However, you can buy Metronidazole online from Prescription Doctor following a quick consultation. If our doctor is satisfied that the treatment is safe for you, they can issue a prescription which our UK registered pharmacy can fulfil.

Additional resources

Why do I keep getting bacterial vaginosis?

How can I prevent Bacterial Vaginosis?


Treatment information

  • Product Name: Metronidazole
  • Active Ingredient(s): Metronidazole
  • Administration: Oral
  • Presentation: Tablets
  • Available Strength: 400 mg
  • Exemption: Prescription Only
  • Application: Women over 18
  • Dosage: Take one 400mg tablet twice a day for 7 days
  • Description: An antibiotic which prevents anaerobic bacteria from reproducing and spreading.
  • Drug Class: Antibiotic
  • Alcohol Consumption: Do not consume alcohol
  • When Pregnant: Do not take Metronidazole while pregnant. Speak to your doctor for further advice.
  • When Breastfeeding: Do not take Metronidazole while breastfeeding. Speak to your doctor for further advice.
Click here to view the Metronidazole - Patient Information Leaflet

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