Flagyl

brand

Flagyl Side Effects

Dizziness, headache, stomach upset, nausea, vomiting, loss of appetite, diarrhea, constipation, or metallic taste in your mouth may occur. If any of these effects last or get worse, tell your doctor or pharmacist promptly.

This medication may cause your urine to turn darker in color. This effect is harmless and will disappear when the medication is stopped.

Remember that your doctor has prescribed this medication because he or she has judged that the benefit to you is greater than the risk of side effects. Many people using this medication do not have serious side effects.

Tell your doctor right away if you have any serious side effects, including: signs of a new infection (such as sore throat that doesn't go away, fever), easy bruising/bleeding, stomach/abdominal pain, painful urination.

Get medical help right away if you have any very serious side effects, including: unsteadiness, seizures, mental/mood changes (such as confusion), trouble speaking, numbness/tingling of arms/legs, eye pain, sudden vision changes, headache that is severe or doesn't go away, stiff/painful neck.

Use of this medication for prolonged or repeated periods may result in oral thrush or a new yeast infection. Contact your doctor if you notice white patches in your mouth, a change in vaginal discharge, or other new symptoms.

A very serious allergic reaction to this drug is rare. However, get medical help right away if you notice any symptoms of a serious allergic reaction, including: rash, itching/swelling (especially of the face/tongue/throat), severe dizziness, trouble breathing.

This is not a complete list of possible side effects. If you notice other effects not listed above, contact your doctor or pharmacist.

In the US -

Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088 or at www.fda.gov/medwatch.

In Canada - Call your doctor for medical advice about side effects. You may report side effects to Health Canada at 1-866-234-2345.
  • non-infective meningitis
  • vulvovaginal candidiasis
  • thrombocytopenic disorder
  • leukopenia
  • neutropenic disorder
  • acute confusion
  • libido changes
  • depression
  • encephalopathy
  • peripheral neuropathy
  • optic neuropathy
  • nasal congestion
  • xerostomia
  • stomatitis
  • glossitis
  • constipation
  • proctitis
  • acute pancreatitis
  • cystitis
  • vaginal dryness
  • toxic epidermal necrolysis
  • Stevens-Johnson syndrome
  • erythema
  • pruritus of skin
  • urticaria
  • syncope
  • seizure disorder
  • vertigo
  • dizziness
  • insomnia
  • fever
  • dysgeusia
  • ataxia
  • skin rash
  • flushing
  • anorexia
  • headache disorder
  • dysarthria
  • nausea
  • vomiting
  • diarrhea
  • dysuria
  • urinary incontinence
  • polyuria
  • abdominal pain with cramps
  • urine discoloration
  • general weakness
  • irritability
  • furred tongue
  • alcohol intolerance
  • dyspareunia

Drug Interactions

See also Precautions section.

Drug interactions may change how your medications work or increase your risk for serious side effects. This document does not contain all possible drug interactions. Keep a list of all the products you use (including prescription/nonprescription drugs and herbal products) and share it with your doctor and pharmacist. Do not start, stop, or change the dosage of any medicines without your doctor's approval.

Some products that may interact with this drug include: alcohol-containing products (such as cough and cold syrups, aftershave), products containing propylene glycol, lopinavir/ritonavir solution, lithium.

Do not take metronidazole if you are also taking disulfiram or if you have taken disulfiram within the last 2 weeks.

This medication may interfere with certain lab tests, possibly causing false test results. Make sure lab personnel and all your doctors know you use this drug.