What bacteria does metronidazole kill
Rachel Hunter
Published Mar 26, 2026
Metronidazole has activity against protozoans like Entamoeba histolytica, Giardia lamblia and Trichomonas vaginalis, for which the drug was first approved as an effective treatment. Anaerobic bacteria which are typically sensitive are primarily Gram-negative anaerobes belonging to the Bacteroides and Fusobacterium spp.
Is metronidazole a broad spectrum antibiotic?
Flagyl , known as metronidazole or by the brand name Protostat, is an antibacterial drug that is classified as a broad-spectrum antibiotic. 1 Metronidazole is used to treat certain bacterial infections or protozoal infections (a type of parasite).
Will metronidazole kill E coli?
However, the metronidazole-mediated killing of E. coli is documented. The rate of kill and liberation of acetamide, a major product formed after the reduction of metronidazole and heterocycle fission, is higher in B.
What does metronidazole treat in humans?
Metronidazole is an antibiotic that is used to treat bacterial infections of the vagina, stomach, liver, skin, joints, brain and spinal cord, lungs, heart, or bloodstream. Metronidazole is also used to treat trichomoniasis, a sexually transmitted disease caused by a parasite.Can metronidazole treat chlamydia?
If symptoms suggest recurrent or persistent urethritis, the CDC recommends treatment with 2 g metronidazole (Flagyl) orally in a single dose plus 500 mg erythromycin base orally four times per day for seven days, or 800 mg erythromycin ethylsuccinate orally four times per day for seven days.
Does metronidazole treat trichomoniasis?
Trichomoniasis is usually treated quickly and easily with antibiotics. Most people are prescribed an antibiotic called metronidazole which is very effective if taken correctly. You’ll usually have to take metronidazole twice a day, for 5 to 7 days. Sometimes this antibiotic can be prescribed in a single, larger dose.
How does metronidazole stop the growth of bacteria?
Metronidazole diffuses into the organism, inhibits protein synthesis by interacting with DNA and causing a loss of helical DNA structure and strand breakage. Therefore, it causes cell death in susceptible organisms.
How quickly does metronidazole work?
This medication should take effect within 1 to 2 hours, and while effects may not be visibly noticed immediately, but gradual improvements are usually noticable after a few days.What foods should I avoid while taking metronidazole?
- Do not mix these items with drugs such as metronidazole (Flagyl) and linezolid (Zyvox), used to treat bacterial infections.
- These foods, along with tap beer, red wine, and sherry, contain tyramine, an amino acid that can cause blood pressure to spike if taken with linezolid.
In anaerobic or microaerophilic bacteria or luminal parasites, metronidazole is activated when it receives an electron from ferredoxin or flavodoxin that was reduced by POR (9, 36, 37, 40, 47, 61, 68, 72, 87, 88).
Article first time published onCan metronidazole cure UTI?
Ampicillin is effective, safe and well-tolerated therapy for UTI by G. vaginalis. In contrast oral metronidazole is effective but no safe and bad-tolerated therapy for the same condition.
What is the indication of metronidazole?
FLAGYL is indicated in the treatment of acute intestinal amebiasis (amebic dysentery) and amebic liver abscess. In amebic liver abscess, FLAGYL therapy does not obviate the need for aspiration or drainage of pus.
Can metronidazole treat BV?
Treatment of BV is usually recommended. The two most common prescription medications used for the treatment of BV are metronidazole and clindamycin. Both medications need to be used for multiple days and can be taken in pill form by mouth, or with a gel or cream that is inserted inside the vagina.
Can metronidazole treat yeast infection?
Metronidazole vaginal is used to treat women with vaginal infections (eg, bacterial vaginosis). Metronidazole belongs to the class of medicines known as antibiotics. It works by killing the bacteria or preventing their growth. However, this medicine will not work for vaginal fungus or yeast infections.
How long does it take for BV to clear up with metronidazole?
The three best treatments for Bacterial Vaginosis include: Metronidazole 0.75% vaginal gel once a day for 5 days. Metronidazole (Flagyl) 500 mg pills twice a day for 7 days.
What does metronidazole do to your discharge?
A common side effect from metronidazole (vaginal) is a thick, white vaginal discharge with or without an odor which usually goes away soon after completing a full course of treatment.
What does trichomoniasis look like?
Trichomoniasis Symptoms in Women Normally, vaginal discharge is clear or whitish and can vary in texture. With trich, you may notice changes such as: Difference in color — it may still be clear or whitish, but could also look gray, green, or yellow. Foul-smelling discharge.
Is BV and trich treated the same?
Both BV and Trich may be cured in a short time with appropriate antibiotics. However, it is important to take the full course of antibiotics even if symptoms go away.
What are the symptoms of trichomoniasis in females?
- Itching, burning, redness or soreness of the genitals;
- Discomfort with urination;
- A change in their vaginal discharge (i.e., thin discharge or increased volume) that can be clear, white, yellowish, or greenish with an unusual fishy smell.
Why can't I eat chocolate while taking metronidazole?
Alcohol, avocados, bananas, chocolate, salami Alcohol and metronidazole together could cause nausea, stomach cramping, and vomiting.
Is Flagyl strong antibiotic?
Flagyl: Decades of Bad Side Effects The US Food and Drug Administration (FDA) first approved Flagyl (generic name: metronidazole) way back in the 1960’s, so you’ve probably taken it, or know someone who has. It’s a potent drug in the nitroimidazole class used to treat bacterial infections of the: stomach and intestine.
Does metronidazole make you sleepy?
Metronidazole tablets may make you feel drowsy, dizzy, confused or affect your vision, cause fits or hallucinations. Make sure you are not affected before you drive, operate machinery or take part in any activities where these may put you or others at risk.
Is 5 days of metronidazole enough?
The main points to note about metronidazole include: The usual dose is 400-500 mg twice a day for 5-7 days. A single dose of 2 grams of metronidazole is an alternative, although this may be less effective and may cause more side-effects. (Note: this single dose is not recommended if you are pregnant.)
Is metronidazole the same as Flagyl?
Metronidazole is used to treat a certain type of vaginal infection (bacterial vaginosis) in women who are not pregnant. Metronidazole is an antibiotic that works by stopping the growth of bacteria. Metronidazole is available under the following different brand names: Flagyl, Flagyl ER, and Flagyl IV RTU.
Why is metronidazole not working for BV?
Second, the bacteria that either cause BV or cause the anaerobic overgrowth may have become relatively more resistant to metronidazole (the most common treating agent) or to clindamycin (the other common treating agent). Third, this infection may be reintroduced back into the vagina as a result of reinfection.
What parasites does flagyl treat?
Flagyl is used to treat parasitic infections including Giardia infections of the small intestine, amebic liver abscess, and amebic dysentery (infection of the colon causing bloody diarrhea), bacterial vaginosis, trichomonas vaginal infections, and carriers of trichomonas (both sexual partners) who do not have symptoms …
Does flagyl treat coccidia?
Used as an alternative treatment for coccidiosis in dogs and cats, and the oocyte shedding stage of toxoplasmosis in cats. Not commercially available in the US, but can be imported. Metronidazole (Flagyl) – This drug is an antibiotic that is also used to treat infections such as Giardia, Trichomoniasis, and Amoebiasis.
Can metronidazole cause a yeast infection?
Metronidazole should not be used to treat a yeast infection (candidiasis). In fact, the use of metronidazole may cause a yeast infection in some. It’s estimated that 10% of women taking metronidazole end up with a yeast infection as a side effect of treatment.
Can UTI turn into BV?
Both infections are likely the result of increased frequency of sexual intercourse; it is unlikely that BV causes UTI or vice versa. Thus, women with BV should be screened for UTI only if symptoms arise.
Why is my urine dark after taking metronidazole?
Dark brown or black urine has been associated with drugs such as nitrofurantoin, acetaminophen overdose, and metronidazole. While the exact mechanism is unknown, it has been hypothesized that the pigment of an azometabolite is responsible for metronidazole-induced urine discoloration.
What does BV smell like?
Discharge: The hallmark sign of BV is discharge with a “fishy” smell. Discharge from yeast infections doesn’t usually have a strong smell but may look like cottage cheese.
