Fasigyn
In brief
- Fasigyn is the card name for generic tinidazole 500 mg tablets, an antiprotozoal and antibacterial of the nitroimidazole group.
- Fasigyn (tinidazole) is directed by doctors for trichomoniasis, giardiasis, amebiasis, bacterial vaginosis and anaerobic bacterial infections.
- Available here: Fasigyn 500 mg tablets, in packs of 60 to 360 tablets.
- Fasigyn is a prescription medicine; a doctor confirms the diagnosis, the dose and the length of the course.
- No alcohol while taking Fasigyn and for 72 hours after the last dose, as a severe reaction can occur.
- A metallic taste, nausea and headache count among the common effects of Fasigyn.
- Fasigyn is usually taken with food, and the full course should be finished as prescribed.
- Delivery time depends on the shipping method and is shown at checkout.
Fasigyn Key Facts
- Active ingredient (INN): tinidazole
- What is supplied: 500 mg tablets
- Tablets per pack: 60 to 360
- Drug class: nitroimidazole, antiprotozoal and antibacterial
- ATC code: P01AB02
- Status: prescription medicine
What the Fasigyn Name on This Card Means
Fasigyn is a familiar trade name for tinidazole. Under that name we supply generic tinidazole 500 mg tablets, the generic equivalent of the brand. The pack may print a different name, but the active ingredient stays tinidazole. This page describes the 500 mg tablets in packs of 60 to 360 only.
Infections Where Fasigyn Is Prescribed
Fasigyn is a prescription medicine against infections caused by protozoa and by anaerobic bacteria, the kind that thrive without oxygen. A doctor decides on treatment once the infection has been diagnosed.
- trichomoniasis, an infection with Trichomonas vaginalis, where the sexual partner is normally treated at the same time,
- giardiasis, a gut infection with Giardia lamblia,
- intestinal amebiasis and amebic liver abscess (after Fasigyn, the doctor prescribes a luminal amoebicide to clear parasites that remain inside the gut),
- bacterial vaginosis,
- anaerobic bacterial infections, and preventing such infections around certain surgical procedures.
Aerobic bacteria, fungi and viruses are not affected by Fasigyn, so it does nothing for a cold or the flu.
How Tinidazole in Fasigyn Kills Microbes
Tinidazole penetrates protozoa and anaerobic bacteria and is converted there into forms that damage their DNA, killing the sensitive organisms. It remains in the body longer than the older metronidazole, which is why one dose of Fasigyn can be sufficient for some infections.
Fasigyn Dose Ranges for Adults
Only your doctor sets the Fasigyn dose. The ranges are informational, taken from typical monograph guidance for adults, and do not replace your doctor's instructions.
| Infection | Informational adult range | Comment |
|---|---|---|
| Trichomoniasis | 2 g (four Fasigyn 500 mg tablets) taken once | the partner is treated simultaneously |
| Giardiasis | 2 g taken once | with food |
| Intestinal amebiasis | 2 g daily for 3 days | an amebic liver abscess may call for a longer course, as the doctor decides |
| Bacterial vaginosis | 2 g daily for 2 days, or 1 g daily for 5 days | the doctor selects the schedule |
| Anaerobic infections | a larger first dose followed by a smaller daily dose for several days | the doctor sets the length |
Whether children can take Fasigyn, and at what dose, depends on their age and the condition. Never apply the adult schedule to a child on your own.
Taking Fasigyn Tablets Correctly
- Swallow the tablets with water, ideally during or after a meal to lessen nausea.
- Complete the entire Fasigyn course as prescribed, even once you feel better.
- On a multi-day schedule, a missed dose is taken when you remember unless the next dose is almost due. Never take two together.
- Fasigyn tablets are for you only; do not share them.
Fasigyn and Alcohol: 72 Hours Matter
Avoid alcohol throughout Fasigyn treatment and for 72 hours after the final dose. With alcohol, tinidazole can set off a disulfiram-like reaction: flushing, a racing heart, nausea, vomiting and abdominal cramps. Products containing alcohol or propylene glycol should also be avoided for the same period.
Who Cannot Take Fasigyn
- People allergic to tinidazole, metronidazole or other nitroimidazoles.
- Women in the first trimester of pregnancy.
- People with a history of blood disorders or an active central nervous system disease, unless the doctor decides otherwise.
- Anyone who has taken disulfiram in the last two weeks.
Prior to Fasigyn, tell your doctor about liver disease, epilepsy or other nervous system disorders, and all medicines you take.
Fasigyn Side Effects
Common Fasigyn Side Effects
- a metallic or bitter taste in the mouth,
- nausea, poor appetite, abdominal discomfort or diarrhea,
- headache and dizziness,
- darker urine, tiredness, rash or itching.
The monograph gives how frequent each effect is.
Serious Fasigyn Side Effects
- numbness, tingling or weakness in hands or feet (peripheral neuropathy),
- seizures,
- fewer white blood cells, showing up as fever or frequent infections,
- severe allergic and skin reactions.
A seizure or a severe rash with blistering, peeling or mouth sores means stopping Fasigyn and getting emergency medical help. New numbness or tingling in the limbs deserves a prompt call to a doctor. Swelling of the face, wheezing or breathing trouble requires urgent medical help.
Fasigyn Interactions With Other Medicines
- Alcohol: avoid it during treatment and for 72 hours afterwards.
- Disulfiram: confusion or psychotic reactions may result.
- Warfarin: Fasigyn can strengthen its blood-thinning action, so INR must be monitored.
- Lithium: levels may increase.
- Phenytoin, phenobarbital and rifampin: they clear tinidazole faster and may weaken the effect of Fasigyn.
- Cimetidine: may raise tinidazole levels.
- Fluorouracil and cyclosporine: need monitoring alongside Fasigyn.
Hand your doctor a full list of medicines and supplements before Fasigyn starts.
Fasigyn, Pregnancy and Breastfeeding
Fasigyn is not used during the first trimester. In later months the doctor decides after weighing benefit against risk. Tinidazole passes into breast milk, so breastfeeding is paused during Fasigyn treatment and for 72 hours after the last dose; milk can be expressed and discarded in the meantime.
Driving While Taking Fasigyn
Dizziness or drowsiness can occur with Fasigyn. Until you know your own reaction, do not drive or operate machinery.
Storing Fasigyn Tablets
- Keep Fasigyn in its original pack at room temperature, away from light and moisture.
- Store the tablets where children cannot reach them.
- Do not use Fasigyn after the expiry date.
Fasigyn Versus Other Nitroimidazoles
| Medicine | Class | Worth knowing |
|---|---|---|
| Fasigyn, tinidazole 500 mg | nitroimidazole | long half-life; one dose can be enough for some infections |
| Metronidazole | nitroimidazole | older medicine, usually taken several times daily for several days |
| Secnidazole | nitroimidazole | another long-acting nitroimidazole, used for bacterial vaginosis and trichomoniasis |
Your doctor chooses between Fasigyn and another nitroimidazole according to the diagnosis and how well you tolerate it.
Fasigyn FAQ
Does Fasigyn work against viral infections?
No. Fasigyn acts on protozoa and anaerobic bacteria, not on viruses, fungi or aerobic bacteria, so it is not a treatment for a cold or the flu.
Should my partner be treated when I take Fasigyn for trichomoniasis?
The sexual partner is usually treated at the same time, as your doctor will explain.
Can I stop Fasigyn once I feel better?
No. Finish the whole Fasigyn course as prescribed, even if symptoms ease sooner.
Which Fasigyn tablets and packs are offered?
Fasigyn is supplied as 500 mg generic tinidazole tablets, in packs of 60 to 360 tablets. Delivery time depends on the shipping method and is shown at checkout.
