Metronidazole Information - Side Effects, Drug Interactions, Conditions
show timeout overlay link

Your Session Is About to Expire

This online session is about to expire due to inactivity. Click Continue to return to page.

Metronidazole

Also see:
  • Get answers to Frequently Asked Questions (FAQs)
  • Find other class related drugs
  • Find additional patient usage statistics

Most Commonly Used
Drug Image file DrugItem_11894.JPG
Metronidazole 250mg Tab
Pliva Inc a Division of Teva USA
Pill Identification: PLIVA 333 
Drug Image file DrugItem_14784.JPG
Metronidazole 500mg Tab
Actavis Pharma, Inc., formerly Watson Pharmaceuticals Inc
Pill Identification: WPI  |  39 70
Drug Image file DrugItem_14816.JPG
Metronidazole 250mg Tab
Actavis Pharma, Inc., formerly Watson Pharmaceuticals Inc
Pill Identification: WPI  |  3969
Drug Image file default-drug-image.png
Metronidazole 0.75% Vag Gel
Drug Image file DrugItem_2057.JPG
Metronidazole 500mg Tab
Pliva Inc a Division of Teva USA
Pill Identification: PLIVA 334 
Overview Information on Metronidazole
Pharmacist Tip
If you miss a dose, take metronidazole as soon as you remember, unless it's close to the time for you to take your next scheduled dose. In this case, skip the dose you missed and resume your normal schedule.     
Metronidazole is a type of antibiotic doctors use to treat bacterial and other infections caused by organisms called protozoans. Your doctor may have prescribed metronidazole to treat an infection in different parts of your body, from the skin to the stomach to the reproductive organs and elsewhere.

Metronidazole works by killing bacteria and protozoans by preventing them from multiplying. The way that metronidazole works when used as a topical medicine is not completely understood, but it is thought to reduce inflammatory areas, known as rosacea. Metronidazole may have some antibacterial and/or an anti-inflammatory effect when applied to the skin.

Metronidazole comes in different forms, including oral tablets, extended-release tablets, and capsules. Metronidazole is sold as the brand names Flagyl® and Flagyl ER.

Metronidazole also comes as a topical gel that is applied to the skin (brand names are Metrogel®, Nydamax®, and Rosadan®); as a topical cream (brand names are Noritate® and Rosadan®); as a topical lotion (brand name is MetroLotion®); and as a vaginal gel (brand names are Metro-Gel® and Vandazole®).

Before you start taking metronidazole, it's important to tell your doctor if you have any allergies. He or she should also know what medicines you are taking (including over-the-counter and herbal treatments) and what medical conditions you have. Before you take metronidazole, tell your doctor if you have had Crohn's disease or a blood, kidney, or liver disease.

Also be sure to tell your doctor if you are breast-feeding or pregnant before taking metronidazole. If you get pregnant while taking metronidazole, make sure you tell your doctor right away.

You should also be honest with your doctor about your alcohol use before taking metronidazole. You cannot drink alcohol when taking metronidazole. Drinking alcohol when taking metronidazole will cause you to have side effects such as vomiting, flushing, or headaches, among others. Be aware that some over-the-counter medicines, such as cold medicines, contain alcohol and can trigger the same side effects when you are taking metronidazole.

Metronidazole can cause some side effects. Be sure to tell your doctor if you get the following symptoms and they are severe or won't go away when you are taking metronidazole:
  • Stomach symptoms, such as vomiting, nausea, diarrhea, and loss of appetite
  • Headaches
  • Irritability
  • Trouble sleeping and irritability
  • Dry mouth, furry tongue, mouth or tongue irritation, or a metallic taste in your mouth
Some patients have reported that their hands and feet felt numb or tingly when taking metronidazole.

Get medical help right away if you break out in a rash or are itching when taking metronidazole. The same is true if you experience a stuffy nose, fever, or pain in your joints.


Clinical Review by Jodi Grimm, RPh and Ann Ciemnoczolowski, MS, ELS on May 15, 2013
Metronidazole is a type of antibiotic doctors use to treat bacterial and other infections caused by organisms called protozoans. Your doctor may have prescribed metronidazole to treat an infection in different parts of your body, from the skin to the stomach to the reproductive organs and elsewhere.

Metronidazole works by killing bacteria and protozoans by preventing them from multiplying. The way that metronidazole works when used as a topical medicine is not completely understood, but it is thought to reduce inflammatory areas, known as rosacea. Metronidazole may have some antibacterial and/or an anti-inflammatory effect when applied to the skin.

Metronidazole comes in different forms, including oral tablets, extended-release tablets, and capsules. Metronidazole is sold as the brand names Flagyl® and Flagyl ER.

Metronidazole also comes as a topical gel that is applied to the skin (brand names are Metrogel®, Nydamax®, and Rosadan®); as a topical cream (brand names are Noritate® and Rosadan®); as a topical lotion (brand name is MetroLotion®); and as a vaginal gel (brand names are Metro-Gel® and Vandazole®).

Before you start taking metronidazole, it's important to tell your doctor if you have any allergies. He or she should also know what medicines you are taking (including over-the-counter and herbal treatments) and what medical conditions you have. Before you take metronidazole, tell your doctor if you have had Crohn's disease or a blood, kidney, or liver disease.

Also be sure to tell your doctor if you are breast-feeding or pregnant before taking metronidazole. If you get pregnant while taking metronidazole, make sure you tell your doctor right away.

You should also be honest with your doctor about your alcohol use before taking metronidazole. You cannot drink alcohol when taking metronidazole. Drinking alcohol when taking metronidazole will cause you to have side effects such as vomiting, flushing, or headaches, among others. Be aware that some over-the-counter medicines, such as cold medicines, contain alcohol and can trigger the same side effects when you are taking metronidazole.

Metronidazole can cause some side effects. Be sure to tell your doctor if you get the following symptoms and they are severe or won't go away when you are taking metronidazole:
  • Stomach symptoms, such as vomiting, nausea, diarrhea, and loss of appetite
  • Headaches
  • Irritability
  • Trouble sleeping and irritability
  • Dry mouth, furry tongue, mouth or tongue irritation, or a metallic taste in your mouth
Some patients have reported that their hands and feet felt numb or tingly when taking metronidazole.

Get medical help right away if you break out in a rash or are itching when taking metronidazole. The same is true if you experience a stuffy nose, fever, or pain in your joints.


Clinical Review by Jodi Grimm, RPh and Ann Ciemnoczolowski, MS, ELS on May 15, 2013

CVS Patient Statistics for Metronidazole
Usage by Age
8.28%
under20_base
26.61%
20to40_base
34.63%
40to60_base
30.48%
over60_base
Most Commonly Used By CVS Patients
Usage by Gender
female_fill_graph
72.71%
female_fill_graph
male_fill_graph
27.29%
male_fill_graph
Learn More About Metronidazole
Select a specific form of this drug to visit the summary page where you can:
  • Get answers to Frequently Asked Questions (FAQs)
  • Find other class related drugs
  • Find additional patient usage statistics
Select a Form

Patient Experiences with Metronidazole

We want to help you stay educated about the medications you are taking. View other
patient's observations and share your own.

Be sure to consult your health care provider before taking any medications. Other
patient's comments should not be considered medical advice or health care provider
recommendations.