If you suffer from Bacterial Vaginosis (also known as BV), you’ve probably heard of Metronidazole. This prescription-only medication is extremely effective at treating BV — and Metronidazole side effects are also very uncommon.
Although the risk of encountering Metronidazole side effects is usually low, it is always worth finding out more about any medication and how it could potentially affect you before starting any course of treatment.
On this page, we’ll be talking about the side effects of Metronidazole in detail — from more common side effects to the more serious, as well as how to cope with any potential reactions. Read on to find exactly what to expect if you decide to use this BV treatment.
For more general information about Metronidazole, visit our ‘What is Metronidazole?’ page.
Everybody is different, which means that we can all react to the same medicine in different ways. Most users don't experience any negative Metronidazole side effects at all and should have a very positive experience with the medication.
However there is always a chance that side effects could occur — whether they are the more common side effects, or the more unusual.
Here is a summary of the known side effects of Metronidazole (most of these are very rare):
These side effects range from what is thought to be more mild and more common side effects of Metronidazole (such as nausea - around 1 in 10 people) to very rare (such as psychotic problems). The likelihood of experiencing any of these side effects can vary from user to user; what one individual may encounter could be completely different from another.
If you are concerned about any reactions or Metronidazole side effects you are experiencing (particularly if they feel severe, long-lasting or painful), then you should consult your doctor for further guidance.
Many of the Metronidazole side effects we’ve listed above will not be experienced by the majority of users.
However, there are some more common side effects of Metronidazole tablets that are more likely to occur.
The most common may include headaches, nausea, vomiting, an upset stomach, diarrhoea, constipation, loss of appetite, abdominal pains, heartburn, a metallic taste in the mouth, and a furry tongue.
It is worth noting that these more common side effects usually do not need medical attention, and that most people have no problems taking this widely used medicine for a week-long course. These side effects will usually go away during treatment as your body adjusts to the medicine.
Serious side effects of Metronidazole are very unusual but may happen.
Below, we have listed some of the more unlikely but serious side Metronidazole effects and symptoms:
Stop taking the tablets and tell your doctor straight away if any of these unlikely but serious side effects occur.
A serious allergic reaction to Metronidazole tablets is very rare, but it can happen.
Seek immediate medical attention if you notice any of the below symptoms of a serious allergic reaction:
These are the symptoms of a serious allergic reaction to Metronidazole, and you should treat this as an emergency — get emergency medical attention immediately by calling 999.
Most Metronidazole side effects shouldn’t last that long.
Usually, they will start from relatively soon after you take a tablet, and should be over in between 30 minutes to several hours (or potentially longer), depending on the type of side effect you experience.
The length of time you experience side effects will vary depending on how your body naturally reacts to the medication; every individual is different, meaning we can all react to the same medication in different ways. This may also vary depending on whether you’ve taken the Metronidazole tablet with food or without.
If the side effects don’t go away, you should talk to your doctor or pharmacist.
If you’re worried about suffering from Metronidazole side effects during your course of treatment, there are a few things you can do to reduce the likelihood of experiencing side effects, as well as the severity of side effects.
These tips will help you to cope with the most common Metronidazole side effects:
As we know, it is important to avoid alcohol whilst taking Metronidazole and for at least 48 hours after your course has finished to avoid any severely unpleasant side effects (nausea and vomiting are much more likely to occur).
If this happens, sip on water to ease feelings of nausea. Make sure you sit down and avoid any sudden movements to help with any lightheadedness you have from flushing, dizziness and increased heart rate.
If your symptoms persist or become worse, you should seek medical help.
It is strongly recommended by medical professionals that you do not use Metronidazole alongside alcohol. This is because Metronidazole is known to react badly with alcohol and can cause a number of unpleasant side effects.
For more information, you can go to our Metronidazole and alcohol page.
If you have been taking Metronidazole to treat BV and you are concerned that any reactions or side effects you are experiencing are abnormal (especially if they persist or get worse), then you should consult your doctor for further guidance. You may need to stop the treatment, but it is best to talk to your doctor or pharmacist as this could impact the effectiveness of the medicine.
Call your doctor immediately if you experience the below unlikely but serious symptoms:
Seek urgent medical help straight away if any of these unlikely but serious side effects occur:
These are the symptoms of a serious allergic reaction to Metronidazole, and you should treat this as an emergency.
If you are pregnant and wish to use Metronidazole, you should consult your doctor first; for more on this, go to our Metronidazole while pregnant page.
Metronidazole is a very safe and effective antibiotic medication used to treat bacterial vaginosis (BV). Many users will not experience any negative Metronidazole side effects at all and will have a very positive experience with the medication on the whole.
However, as with any medication, there is always a chance that side effects could occur — whether they are the more common side effects, or the more unusual.
You are most likely to experience mild side effects when taking Metronidazole: primarily, some stomach upsets and nausea, a metallic taste in the mouth, and a furry tongue. On the whole, these do not need medical attention — but if you are unsure or concerned in anyway, you should contact a doctor, pharmacist or another medical professional.
You can buy Metronidazole at The Independent Pharmacy using our secure and discreet online service. It’s very easy, and free to do; all you need to do is fill in a short online questionnaire before we deliver your treatment straight to your door.
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