This information is not a substitute for medical advice. Always discuss possible side effects with a healthcare provider who knows your medical history. Metronidazole oral tablet can interact with other medications, vitamins, or herbs you may be taking. An interaction is when a substance changes the way a drug works. This can be harmful or prevent the drug from working well.
To help avoid interactions, your doctor should manage all of your medications carefully. Disulfiram: Do not take disulfiram with metronidazole. Doing so can cause dangerous effects in your body. Using it with metronidazole can cause psychotic reactions.
Symptoms can include:. Taking metronidazole with certain medications raises your risk of side effects. This is because the amount of either drug may be increased in your body. Examples include:. However, because drugs interact differently in each person, we cannot guarantee that this information includes all possible interactions.
Always speak with your healthcare provider about possible interactions with all prescription drugs, vitamins, herbs and supplements, and over-the-counter drugs that you are taking. All possible dosages and drug forms may not be included here. Your dosage, drug form, and how often you take the drug will depend on:. The kidneys and liver of older adults may not work as well as they used to. This can cause your body to process drugs more slowly.
As a result, more of a drug stays in your body for a longer time. This increases your risk of side effects. Your doctor may start you on a lowered dose or a different medication schedule. This can help keep levels of this drug from building up too much in your body.
Metronidazole oral tablets may cause certain serious conditions that affect the nervous system. These conditions include:. If you have an allergic reaction, call your doctor or local poison control center right away. If your symptoms are severe, call or go to the nearest emergency room. In some cases, taking it again could lead to death. You should stop using drinks that contain alcohol at least three days before starting metronidazole. Also avoid alcohol for three more days after you stop treatment with this drug.
For people with liver disease: Your liver helps process this drug. If you have severe liver disease, your liver may process this drug more slowly. This would increase the amount of the drug in your body and raise your risk of side effects.
Your doctor may lower your dosage of metronidazole or have you take it less often. For people with kidney disease: Your kidneys help clear this drug from your body. If you have severe kidney disease, your kidneys may process this drug more slowly. This increases the amount of the drug in your body and raises your risk of side effects.
Your doctor may lower your dose of metronidazole or have you take it less often. For pregnant women: Metronidazole is a category B pregnancy drug. Make sure you do not accidentally get it on your breasts. If this happens, wash off any cream or gel from your breasts before feeding your baby.
Metronidazole cream or gel is not known to cause any problems with other medicines. However, there are some medicines that don't mix well with the tablets, suppositories, liquid or vaginal gel.
Tell your doctor before you start taking metronidazole tablets, suppositories, liquid or vaginal gel if you're taking these medicines :. There are no known problems with taking herbal remedies and supplements alongside metronidazole. However, some remedies and supplements that come as liquids that you drink may also contain alcohol. Check the list of ingredients or ask the supplier or manufacturer. Tell your doctor or pharmacist if you're taking any other medicines, including herbal medicines, vitamins or supplements.
Metronidazole is an antibiotic. It works by stopping the growth of the bacteria or parasites causing the infection. For most infections, you should feel better within a few days. With serious swelling including dental infections , the medicine will start working within a few days but it may take longer before your symptoms start to get better.
For some of the infections that metronidazole is used for, you may only begin to notice an improvement after a week. When using the cream or gel to treat rosacea, you may have to wait a few weeks before you see any improvement. It's very important that you keep taking metronidazole until the course is finished. Do this even if you feel better. It will help stop the infection coming back. Tell your doctor if you still do not feel better 2 or 3 days after finishing your course of metronidazole.
Also tell them if, at any time, you start to feel worse. Metronidazole does not stop any type of contraception from working, including the combined pill and emergency contraception. However, if metronidazole makes you vomit or have severe diarrhoea, your contraceptive pills may not protect you from pregnancy.
If this happens, follow the instructions in the leaflet that comes with your contraceptive pills. Read more about what to do if you're on the pill and you're being sick or have diarrhoea. Some people get a fungal infection called thrush after taking a course of antibiotics like metronidazole. This is more common if you're using the vaginal gel. It happens because antibiotics kill the normal harmless bacteria that help to protect you against thrush.
There's no clear evidence to suggest that taking metronidazole will reduce fertility in either men or women. However, speak to a pharmacist or doctor before taking it if you're trying to get pregnant. However, very rarely, some people suffer from drowsiness or blurred vision.
Do not drive or ride a bike until you stop feeling drowsy and your vision is clear. Do not drink alcohol while you're taking metronidazole, including for 2 days afterwards. This gives the medicine time to leave your body. This is important because metronidazole can react with alcohol to cause a number of side effects. These include feeling and being sick, stomach pain, hot flushes, a pounding heartbeat palpitations and a headache.
You must not have any alcohol in either your food or drink while taking metronidazole - and for 2 days afterwards. Page last reviewed: 6 December Next review due: 6 December Metronidazole On this page About metronidazole Key facts Who can and cannot take metronidazole Tablets, liquid or suppositories Cream or gel Vaginal gel Side effects How to cope with side effects Pregnancy and breastfeeding Cautions with other medicines Common questions. About metronidazole Metronidazole is an antibiotic.
Metronidazole is only available on prescription. Help us improve our website Can you answer a quick question about your visit today? The most common side effects of metronidazole tablets, liquid, suppositories or vaginal gel are feeling or being sick, diarrhoea, and a slight metallic taste in your mouth.
Do not drink alcohol while taking a course of metronidazole tablets, liquid, suppositories or vaginal gel, or for 2 days after finishing treatment. Alcohol can cause side effects such as feeling and being sick, stomach pain, hot flushes, a pounding heartbeat palpitations and a headache. For most infections, you'll start to feel better in a few days but for some it may take longer.
When treating rosacea, you may only notice a difference after several weeks. Metronidazole tablets or suppositories are called by the brand name Flagyl.
Metronidazole cream is called by the brand names Rosiced or Rozex. To make sure the tablets, liquid or suppositories are safe for you, tell your doctor if you: have had an allergic reaction to metronidazole or any other medicines in the past are pregnant or breastfeeding have liver problems are having dialysis feel you will not be able to stop drinking alcohol while using metronidazole To make sure the external cream or gel is safe for you, tell your doctor if you: have had an allergic reaction to metronidazole or any other medicines including any creams or ointments in the past are pregnant or breastfeeding To make sure the vaginal gel is safe for you, tell your doctor if you: have had an allergic reaction to metronidazole or any other medicines in the past are pregnant or breastfeeding have liver problems feel you will not be able to stop drinking alcohol while using metronidazole think you may have vaginal thrush.
How long should I take it for? Important Carry on taking this medicine until you have finished the course, even if you feel better. What if I forget to take it? What if I take too much? The following information includes only the average doses of this medicine. If your dose is different, do not change it unless your doctor tells you to do so. The amount of medicine that you take depends on the strength of the medicine.
Also, the number of doses you take each day, the time allowed between doses, and the length of time you take the medicine depend on the medical problem for which you are using the medicine. If you miss a dose of this medicine, take it as soon as possible. However, if it is almost time for your next dose, skip the missed dose and go back to your regular dosing schedule.
Do not double doses. Store the medicine in a closed container at room temperature, away from heat, moisture, and direct light. Keep from freezing. There is a problem with information submitted for this request. Sign up for free, and stay up-to-date on research advancements, health tips and current health topics, like COVID, plus expert advice on managing your health.
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