Metronidazole (Flagyl ER)
$0.26
Flagyl ER (Metronidazole) treats bacterial and parasite infections of the gut, gums, skin and reproductive system.
Drug Information
17 reviews for Metronidazole (Flagyl ER)
Flagyl ER contains Metronidazole.
Metronidazole is a medicine that kills certain bacteria and parasites. It works well against germs that grow where there is little oxygen, such as deep in the gut, gums and vagina.
It is used for bacterial vaginosis, trichomoniasis, dental and gum infections, some gut infections and infected leg ulcers or pressure sores.
What is it used for?
- Bacterial vaginosis and trichomoniasis
- Dental and gum infections
- Gut infections such as giardia, amoebic dysentery and C. difficile
- Clearing H. pylori stomach infection, together with other medicines
How does it work?
Metronidazole gets inside germs and damages their DNA, so they cannot survive or multiply.
This information is written in simple words to help you understand this product. It does not replace advice from your doctor or pharmacist.
Read these points before you start. If any of them apply to you, talk to your doctor or pharmacist first.
- Do not take it if you have ever had an allergic reaction to this antibiotic or to a similar one.
- Antibiotics only work on infections caused by bacteria. They do not help colds, flu or most sore throats, which are caused by viruses.
- Take the whole course your doctor gives you, even if you feel better after a few days. Stopping early can let the infection come back and make germs harder to treat in the future.
- Tell your doctor if you are pregnant, trying for a baby or breastfeeding.
- Never share your antibiotics or keep leftovers for another time.
- Do not drink any alcohol while you take it and for at least 2 days after the last dose. Alcohol can make you very sick, with vomiting, flushing and a fast heartbeat.
- Tell your doctor if you have liver disease, a blood disorder, or a nerve or brain condition.
- It can make warfarin and lithium stronger.
- Tell your doctor or pharmacist about every other medicine, vitamin or herbal product you use.
- Keep this product out of the reach and sight of children.
Like all medicines, Flagyl ER can cause side effects, but not everybody gets them.
Common side effects
- Feeling sick (nausea) or being sick
- Diarrhoea or loose stools
- Stomach ache or indigestion
- A metallic taste in the mouth
- Dark or reddish-brown urine (this is harmless)
These are usually mild and often get better as your body gets used to it. Tell your doctor if they bother you or do not go away.
Stop using it and get medical help straight away if you notice:
- Severe diarrhoea that is watery or has blood in it, even up to 2 months after you finish the medicine
- Signs of an allergic reaction, such as a rash, swelling of the face, lips or tongue, wheezing or trouble breathing
- A skin rash that blisters or peels, with fever and sore mouth or eyes
- Numbness, tingling or pain in the hands or feet
- A fit (seizure), confusion or trouble walking
This is not a complete list. If you notice anything unusual, ask your doctor or pharmacist.
- Take it exactly as your doctor tells you, usually 2 or 3 times a day.
- Swallow the tablet whole with a glass of water, during or just after a meal to reduce stomach upset. Do not chew it, as it tastes bitter.
- A common adult dose is 400 mg to 500 mg two or three times a day for 5 to 7 days, or a single 2 g dose for some infections.
- Avoid alcohol completely during the course and for 48 hours after.
If you miss a dose: Take it as soon as you remember. If it is nearly time for your next dose, skip the missed one and carry on as normal. Never take two doses at once to make up.
If you use too much: Contact your doctor, a poison control centre or your local emergency number straight away, even if you feel fine. Take the pack with you.
How to store it: Keep it in its original pack at room temperature (below 25°C / 77°F), away from heat, damp and direct sunlight. Do not use it after the expiry date.
- QWhy can't I drink alcohol with Flagyl ER?
- A
Together they can cause flushing, a pounding heart, headache, stomach cramps and vomiting. Avoid all alcohol, including mouthwash that contains alcohol, until 48 hours after your last dose.
- QWhy is my urine dark while taking Flagyl ER?
- A
Metronidazole can make urine darker or reddish-brown. This is harmless and goes away after you stop.
- QDoes my partner need treatment?
- A
For trichomoniasis, yes. Your partner should also be treated, and you should avoid sex until you have both finished treatment.

Camila Nelson –
The cost was clearly shown before I paid, so no nasty surprises. Payment went through smoothly on the first try. Packaging was clean and professional. Will be using this site again.
Ananya Chen –
A friend suggested this site, so I ordered Metronidazole here. No damage anywhere, the packaging did its job. Someone from the team followed up to make sure all was fine.
Marta Chauhan –
This was my second order from the site. No surprise fees at checkout, which I appreciated. Honestly, the order form was short and easy to fill in.
Alexander Russo –
Shipping was fast for me. I think the pricing is fair for what you get. Honestly, their staff was patient with my questions. Great experience, I have already bookmarked the site.
Hugo Ndlovu –
A friend told me about this site, so I gave it a go. The expiry date was fine and everything looked as it should. It got to my door right when they said it would. Five stars from me.
Katarina Leroy –
I compared a few sites and this one had the better price. Overall very good, thanks. The delivery took about as long as I was told.
Gabriel Mahmoud –
First time ordering Flagyl ER online and this site made it easy. For the price, I could not ask for more. I received everything in good time. Customer service was polite and helpful. Easy to deal with, which is what I wanted.
Simran Marino –
Here is my honest feedback on my order. The price was fair compared to other places I checked. I got a helpful reply when I asked about my order. No problems at all, so I am pleased.
Andre Chen –
I was a little nervous about ordering Metronidazole online, but it turned out fine. Reasonably priced and the discount at checkout was a nice touch. Also, finding the right item took very little time.
Yang Nakamura –
Live chat was handy and the answers were useful. The Flagyl ER I ordered was packed neatly and nothing was damaged.
Giovanni Nakamura –
It was wrapped well enough that I had no worry about damage. No confusing steps, just a simple checkout. The price for Metronidazole was reasonable and there were no hidden charges. I would order here again.
Louis Barnes –
I have ordered Metronidazole here before and this time was just as smooth. Nothing was missing from my order. It was affordable and the total at checkout matched what I expected. Plain, tidy packaging and everything inside was in order. A good experience from start to finish.
Ade Alvarez –
I just received my order and wanted to leave a quick note. I got an order confirmation right away and updates after that. The total I saw at checkout was the total I paid. Happy with the experience overall.
Viktor Bailey –
Quick review of my recent order. My Metronidazole matched the description on the page. It was packed with care, which I really noticed. Overall, a smooth and simple experience.
Jack Mitchell –
Tried this site for the first time and had a good experience. Communication was good throughout the order. It came in a reasonable amount of time. Really happy with this order.
Sofia Liu –
I ordered from here after comparing a few options. Adding Metronidazole to the cart and paying was quick. The confirmation emails were clear and arrived quickly. Plus, prices here are easy on the pocket.
Zaid Khan –
I used this site for my latest order and had no problems. The parcel looked untouched when it got to me. I had no issues with what I received.