By Medically reviewed by hellodoktor

Generic Name: Fasigyne Brand Name(s): Generics only. No brands available.


What is Fasigyn® (tinidazole) used for?

Fasigyn® is an antibiotic, which belongs to a group of medicines called nitroimidazoles. It works by killing or stopping the growth of bacteria causing your infection. It will not work against viral infections such as colds or flu.

Fasigyn® is commonly used for treating or preventing these health conditions:

  • Certain infections of the male and female, which are in genital systems, liver and bowel.
  • Certain infections occur during surgery.

Fasigyn® may be used for other purposes, ask your doctor for more information.

How should I take Fasigyn® (tinidazole)?

Take tinidazole with food.

Some infections are treated with only one dose. Follow your doctor’s instructions.

Do not share this medication with another person, even if they have the same symptoms you have.

If you are treating a sexually transmitted infection, make sure your sexual partner seeks medical attention to be treated too.

Take this medication for the full prescribed length of time. Your symptoms may improve before the infection is completely cleared.

How do I store Fasigyn® (tinidazole)?

Fasigyn® is best stored at room temperature away from direct light and moisture. To prevent drug damage, you should not store Fasigyn® in the bathroom or the freezer. There may be different brands of Fasigyn® that may have different storage needs. It is important to always check the product package for instructions on storage, or ask your pharmacist. For safety, you should keep all medicines away from children and pets.

You should not flush Fasigyn® down the toilet or pour them into a drain unless instructed to do so. It is important to properly discard this product when it is expired or no longer needed. Consult your pharmacist for more details about how to safely discard your product.

Precautions & warnings

What should I know before using Fasigyn® (tinidazole)?

Before using this drug, tell your doctor if:

  • You are allergic to any ingredients of this drug.
  • You are allergic to medicines such as Simplotan, Flagyl, Metrogyl and Metozine.

Your doctor will discuss the risks and benefits of taking Fasigyn® during pregnancy (pregnancy up to four months).

If you are a woman of child-bearing age, make sure you do not become pregnant while taking Fasigyn®.

Is it safe during pregnancy or breastfeeding?

There are no adequate studies in women for determining risk when using Fasigyn® during pregnancy or while breastfeeding. Please always consult with your doctor to weigh the potential benefits and risks before taking Fasigyn®. Fasigyn® is pregnancy risk category C, according to the US Food and Drug Administration (FDA).

FDA pregnancy risk category reference below:

  • A=No risk
  • B=No risk in some studies
  • C=There may be some risk
  • D=Positive evidence of risk
  • X=Contraindicated
  • N=Unknown

Side effects

What side effects can occur from Fasigyn® (tinidazole)?

Less serious side effects may include:

  • Vaginal itching or discharge
  • Nausea
  • Vomiting
  • Loss of appetite
  • Indigestion
  • Constipation
  • Diarrhea
  • Stomach cramps
  • Feeling weak or tired
  • Headache
  • Dizziness
  • A metallic or bitter taste in your mouth

Call your doctor at once if you have a serious side effect, such as:

Get emergency medical help if you have any of these signs of an allergic reaction such as hives; difficult breathing; swelling of your face, lips, tongue, or throat.

Not everyone experiences these side effects. There may be some side effects not listed above. If you have any concerns about a side-effect, please consult your doctor or pharmacist.


What drugs may interact with Fasigyn® (tinidazole)?

Fasigyn® may interact with other drugs that you are currently taking, which can change how your drug works or increase your risk for serious side effects. To avoid any potential drug interactions, you should keep a list of all the drugs you are using (including prescription drugs, nonprescription drugs, and herbal products) and share it with your doctor and pharmacist. For your safety, do not start, stop, or change the dosage of any drugs without your doctor’s approval.

Products may interact with this drug, including:

  • Warfarin or other medicines used to prevent blood clots
  • Medicines containing alcohol (e.g., cough syrups)

Does food or alcohol interact with Fasigyn® (tinidazole)?

Fasigyn® may interact with food or alcohol by altering the way the drug works or increase the risk for serious side effects. Please discuss with your doctor or pharmacist any potential food or alcohol interactions before using this drug.

What health conditions may interact with Fasigyn® (tinidazole)?

Fasigyn® may interact with your health condition. This interaction may worsen your health condition or alter the way the drug works. It is important to always let your doctor and pharmacist know all the health conditions you currently have.

Especially, if you have:

  • Kidney disease (or if you are on dialysis)
  • Epilepsy or other seizure disorder
  • A blood cell disorder such as anemia or low platelets
  • A weak immune system
  • Brain disease, spinal cord or nerves


The information provided is not a substitute for any medical advice. You should ALWAYS consult with your doctor or pharmacist before using Fasigyn® (tinidazole).

What is the dose of Fasigyn® (tinidazole) for an adult?

Fasigyn® is usually given as a single dose of four tablets, to be taken at the same time. However, depending on your condition and how you react to the medicine, your doctor may ask you to take some other dose or take it for a longer time.

What is the dose of Fasigyn® (tinidazole) for a child?

For children, the dose depends on body weight. Please consult with your doctor for more information.

How is Fasigyn® (tinidazole) available?

Fasigyn® is available in the following dosage forms and strengths:

  • Tinidazole 500mg tablets

What should I do in case of an emergency or overdose?

In case of an emergency or an overdose, call your local emergency services or go to your nearest emergency room.

What should I do if I miss a dose?

If you miss a dose of Fasigyn®, take it as soon as possible. However, if it is almost time for your next dose, skip the missed dose and take your regular dose as scheduled. Do not take a double dose.

Hello Health Group does not provide medical advice, diagnosis or treatment.

Review Date: March 19, 2017 | Last Modified: September 13, 2019

You might also like