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Flagyl 400mg (Metronidazole)
Qty Price per Unit Price
Flagyl 400mg (metronidazole) x 30 $1.40 $42.00
Flagyl 400mg (metronidazole) x 60 $1.20 $72.00
Flagyl 400mg (metronidazole) x 90 $0.90 $81.00
Flagyl 400mg (metronidazole) x 180 $0.70 $126.00
Flagyl 400mg (metronidazole) x 360 $0.40 $144.00

Quick Overview

Buy Generic Drugs online like Flagyl 400mg for Metronidazole from pillsbrothers. Get the authentic pills from the best online pharmacy store.



Product Information

Flagyl contains 400mg of the active drug Metronidazole. It is an antibiotic that is used to to bacterial and parasitic infections. It is used to treat a wide variety of infections such as, but not limited to gastrointestinal infections, blood infections, gum ulcers and dental infections, skin infections, bone and joint infections, respiratory infections, and genital infections. It is also prescribed to prevent infections after surgery. Antibiotics like Metronidazole are not effective against viral infections like common colds and flu. Using antibiotics when not needed may reduce its efficacy.


Flagyl is manufactured by Abbott India Ltd.


Flagyl is contraindicated to patients with known hypersensitivity to the active ingredient Metronidazole or to other nitromidazole derivates, and any of the inactive ingredients of the tablet. It is also contraindicated to women with trichomoniasis during the first trimester of pregnancy.

Flagyl must not be used by patients who took Disulfiram within the last 2 weeks.

Warnings and Precautions

A patient must first consult a doctor because the medication might not be suitable for all patients as it may affect other medical conditions and interact with other medications. Before taking Flagyl, a patient must inform a healthcare professional of any medical conditions including:

  • Liver disease
  • Kidney disease
  • Stomach disease
  • Intestinal disease
  • Blood cell disorder
  • Epilepsy or seizure disorder
  • Nerve disorders
  • Pregnant or breastfeeding

Some of these conditions may require dose adjustments or tests to determine safe use of medication.

Flagyl may interact with the following medications:

  • Seizure medications
  • Blood thinners
  • Lithium
  • Cimetidine (CYP450 inhibitor)
  • Disulfiram
  • Busulfan
  • Cough or cold medications
  • Lopinavir or ritonavir solution

Metronidazole is under pregnancy category B meaning animal studies have not shown fetal risk but there are no adequate human studies. Flagyl may only be used by pregnant women if clearly needed and no other safer alternatives are available. It is however contraindicated during the first trimester of pregnancy. Pregnant women must discuss the benefits and risks with a doctor. This medication passes into breast milk. Breastfeeding women must discuss the benefits and risks of drug use with a doctor.

This medication may interfere with lab tests. Inform a lab personnel or doctor that this medication is being taken.

Caution should be exercised when driving, operating hazardous machineries and performing tasks requiring alertness. This medication may cause dizziness and drowsiness that will affect one’s safe performance of activities.

Flagyl and Alcohol

Avoid drinking alcohol or products containing propylene glycol during intake of Flagyl and at least 3 days after Flagyl therapy. Metronidazole is associated with disulfiram-like reactions to alcohol such as abdominal cramps, vomiting, nausea, headache, and flushing.




Consult a doctor to get the correct dosage of Flagyl as it will vary per patient. It is important to complete the full course of treatment even if the patient started feeling better in a few days of taking the medication as the symptoms may improve even before the infection is treated. The dose and duration of treatment will depend on the infection being treated and the severity of infection. Take a tablet of Flagyl by mouth, swallowed whole with a full glass of water or milk to prevent stomach upset. It may be taken during or just after a meal. Take a missed dose as soon as remembered but skip it if it’s almost time for the next dose. Do not double the dose to make up for the missed dose. Skipping doses will increase the risk of antibiotic resistant infection therefore it is best to strictly follow the dosing schedule.

The usual adult dose of Flagyl in treating bacterial infection is 800mg as an initial dose. The next dose of 400mg is taken after 8 hours and repeated every 8 hours.

To prevent bacterial infections after surgery, Flagyl should be taken 24 hours before the surgery. A dose of 400mg is taken every 8 hours. Children are given Flagyl tablets 1 to 2 hours before an operation.

Here are a few recommended adult doses for certain infections:

Urogenital Trichomoniasis

  • 2g of Flagyl as a single dose or in two divided doses as one-day treatment.
  • 200mg of Flagyl taken 3 times daily for 1 week as seven-day treatment


  • 750mg of Flagyl taken 3 times daily for 5 to 10 days, as treatment for acute intestinal amoebiasis
  • 500mg or 750mg taken 3 times daily for 5 to 10 days as treatment for amoebic liver abscess

Anaerobic infections

  • 400mg taken 3 times daily for 7 days

Bacterial vaginosis

  • 400mg taken 3 times daily for 7 days
  • 2g as a single dose or in two divided doses given on the same day, as one-day treatment

These recommended doses do not substitute the doctor’s prescribed dose in treating one’s infection. Strictly follow doctor’s dosing instructions.

side effects


Side effects

All medications may cause side effects but not all patients will experience side effects.

Less serious side effects that Flagyl may cause include:

  • dizziness, loss of balance
  • headache
  • nausea, vomiting
  • loss of appetite
  • stomach pain, diarrhea, constipation
  • metallic taste in the mouth, dry mouth
  • vaginal discharge or itching
  • coughing, sneezing, stuffy or runny nose
  • swollen or sore tongue

Notify a healthcare professional if any of these side effects persist or worsen.

Intake of Flagyl must be stopped and emergency medical help is needed if these side effects occur:

  • brain disease (encephalopathy), a rare side effect with symptoms such as fever, stiff neck, headache, seeing or hearing things that do not exist, problems using arms and legs, speech problems and confusion.
  • Severe skin reaction with symptoms of fever, sore throat, skin pain, burning in eyes, spreading red or purplish skin rash that causes blisters, peeling and bleeding. These could be signs of Stevens-Johnson Syndrome or toxic epidermal necrolysis.
  • Allergic reaction with symptoms of itching, rash, hives, swelling of face, lips or throat, difficult breathing.

Notify a healthcare professional if any of these side effects occur. Some of these are signs of a new infection. Side effects include:

  • Seizures
  • Mood or behavior changes
  • Watery of blood diarrhea
  • Painful or burning urination
  • White patches inside the mouth or on lips
  • Vision problems
  • Yellowing of skin or eyes
  • Severe stomach pain
  • Severe tiredness
  • Drowsiness
  • Tremors
  • Muscle twitching
  • Increased light sensitivity
  • Easy brusing or bleeding

Flagyl may cause a darkening of urine which is harmless and usually subside upon discontinuation of therapy.

Consult a healthcare professional for more information on Flagyl side effects.



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