What is Flagyl?

Common Brand(s): Flagyl

Metronidazole is an antibiotic that is used to treat a wide variety of infections. It works by stopping the growth of certain bacteria and parasites.

This antibiotic treats only certain bacterial and parasitic infections. It will not work for viral infections (such as common cold, flu). Using any antibiotic when it is not needed can cause it to not work for future infections.

Metronidazole may also be used with other medications to treat certain stomach/intestinal ulcers caused by a bacteria (H. pylori).


  • acute intestinal amebiasis due to Entamoeba histolytica
  • liver abscess amebiasis due to Entamoeba histolytica
  • balantidiasis
  • giardiasis
  • Clostridioides difficile infection
  • Bacteroides septicemia
  • Clostridium septicemia
  • B. fragilis infection
  • Bacteroides brain abscess
  • dracunculiasis
  • trichomoniasis
  • meningitis due to Bacteroides
  • Bacteroides endocarditis
  • Bacteroides pneumonia
  • Bacteroides empyema
  • lower respiratory infection
  • periodontal infection
  • duodenal ulcer due to H. pylori
  • peptic ulcer due to H. pylori
  • Helicobacter pylori gastritis
  • Crohn's disease
  • diverticulitis of gastrointestinal tract
  • Bacteroides peritonitis
  • Clostridium peritonitis
  • Peptococcus peritonitis
  • Peptostreptococcus peritonitis
  • Eubacterium peritonitis
  • intra-abdominal Bacteroides abscess
  • intra-abdominal Clostridium abscess
  • intra-abdominal Eubacterium abscess
  • intra-abdominal Peptococcus abscess
  • intra-abdominal Peptostreptococcus abscess
  • intra-abdominal anaerobic abscess
  • infectious disease of abdomen
  • Bacteroides liver abscess
  • Clostridium liver abscess
  • Eubacterium liver abscess
  • Peptococcus liver abscess
  • Peptostreptococcus liver abscess
  • Bacteroides tubo-ovarian abscess
  • Clostridium tubo-ovarian abscess
  • Peptococcus tubo-ovarian abscess
  • Peptostreptococcus tubo-ovarian abscess
  • inflammatory disease of female pelvic organs
  • endometritis
  • Clostridium endometritis
  • Peptococcus endometritis
  • Peptostreptococcus endometritis
  • Bacteroides endometritis
  • Bacteroides endomyometritis
  • Clostridium endomyometritis
  • Peptococcus endomyometritis
  • Peptostreptococcus endomyometritis
  • bacterial vaginosis
  • vaginal cuff surgery post-op infection
  • vaginal cuff surgery post-op Bacteroides infection
  • vaginal cuff surgery post-op Clostridium infection
  • vaginal cuff surgery post-op Peptococcus infection
  • post-operative vaginal cuff Peptostreptococcus infection
  • skin and skin structure Bacteroides fragilis infection
  • skin and skin structure Clostridium infection
  • skin and skin structure Peptostreptococcus infection
  • skin and skin structure Peptococcus infection
  • skin and skin structure Fusobacterium infection
  • Bacteroides joint infection
  • Bacteroides osteomyelitis
  • prevention of perioperative infection
  • diabetic foot infection

Usage Instructions

Take this medication by mouth as directed by your doctor. To prevent stomach upset, take this medication with food or a full glass of water or milk. The dosage is based on your medical condition and response to treatment.

For the best effect, take this antibiotic at evenly spaced times. To help you remember, take this medication at the same time(s) every day.

Continue to take this medication until the full prescribed amount is finished, even if symptoms disappear after a few days. Stopping the medication too early may result in a return of the infection.

Tell your doctor if your condition lasts or gets worse.


Store at room temperature away from light and moisture. Do not store in the bathroom. Keep all medications away from children and pets.

Do not flush medications down the toilet or pour them into a drain unless instructed to do so. Properly discard this product when it is expired or no longer needed. Consult your pharmacist or local waste disposal company.