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Fasigyn, Tindamax

Pharmacologic class: Antiprotozoal

Therapeutic class: Anti-infective

Pregnancy risk category C

FDA Box Warning

Prolonged use of metronidazole (a structurally related drug with similar biologic effects) has caused cancer in mice and rats. Reserve tinidazole for conditions listed under "Indications and dosages."


Free nitro radical (generated from tinidazole reduction by Trichomonas cell extracts) may explain activity against Trichomonas species; activity against Giardia and Entamoeba species is unknown.


Tablets: 250 mg, 500 mg

Indications and dosages

Trichomoniasis caused by Trichomonas vaginalis

Adults: Single dose of 2 g P.O. with food, given to both sexual partners simultaneously

Bacterial vaginosis in nonpregnant females

Adults: 2 g P.O. once daily with food for 2 days, or 1 g P.O. once daily with food for 5 days

Giardiasis caused by Giardia duodenalis (Giardia lamblia)

Adults: Single dose of 2 g P.O. with food

Children older than age 3: Single dose of 50 mg/kg (up to 2 g) with food

Amebiasis caused by Entamoeba histolytica

Adults: 2 g P.O. daily with food for 3 days

Children older than age 3: 50 mg/kg (up to 2 g) P.O. daily with food for 3 days

Amebic liver abscess caused by E. histolytica

Adults: 2 g P.O. daily with food for 3 to 5 days

Children older than age 3: 50 mg/kg (up to 2 g) P.O. daily with food for 3 to 5 days

Dosage adjustment

• Hemodialysis patients


• Hypersensitivity to drug, its components, or other nitroimidazole derivatives

• First trimester of pregnancy


Use cautiously in:

• CNS disease, hepatic dysfunction

• history of blood dyscrasias

• elderly patients

• pregnant or breastfeeding patients

• children (except to treat giardiasis and amebiasis in children older than age 3).


• Give with food to minimize GI discomfort.

Adverse reactions

CNS: weakness, fatigue, malaise, dizziness, vertigo, ataxia, insomnia, drowsiness, giddiness, headache, transient peripheral neuropathy, seizures

CV: palpitations

GI: nausea, vomiting, diarrhea, constipation, dyspepsia, gastric discomfort, tongue discoloration, stomatitis, anorexia

Hematologic: transient neutropenia and leukopenia

Musculoskeletal: arthralgia, myalgia, arthritis

Other: altered taste, overgrowth of susceptible organisms, hypersensitivity reactions including angioedema


Drug-drug. Cyclosporine, lithium, tacrolimus: possible increase in blood levels of these drugs

Cholestyramine: decreased oral bioavailability of tinidazole

CYP450 inducers (such as phenobarbital, rifampin): increased tinidazole elimination and decreased blood level

CYP450 inhibitors (such as cimetidine, ketoconazole): increased tinidazole blood level

Fluorouracil: decreased fluorouracil clearance

Fosphenytoin, phenytoin: prolonged half-life and reduced clearance of these drugs

Oxytetracycline: antagonism of therapeutic effects of tinidazole

Warfarin, other oral coumarin anticoagulants: increased effects of these drugs

Drug-diagnostic tests. Alanine aminotransferase, aspartate aminotransferase, hexokinase glucose, lactate dehydrogenase, triglycerides: interference with test results

Drug-behaviors. Alcohol use: disulfiram-like reaction during tinidazole therapy and for 3 days after

Patient monitoring

Closely monitor patient for neurologic abnormalities, such as seizures and peripheral neuropathy. If these occur, withdraw drug immediately.

• Monitor blood chemistry tests, especially liver function tests.

Patient teaching

• Advise patient to take drug with food.

• For child or other patient unable to swallow tablets, inform parent or caregiver that drug can be crushed in artificial cherry syrup and given with food.

Caution patient or caregiver to stop therapy and call prescriber immediately if seizures or numbness or tingling in extremities occurs.

• Instruct patient to avoid alcohol use during therapy.

• Advise female patient to avoid pregnancy during therapy.

• Counsel female patient to avoid breastfeeding during therapy and for 3 days after last dose.

• As appropriate, review all other significant and life-threatening adverse reactions and interactions, especially those related to the drugs, tests, and behaviors mentioned above.

McGraw-Hill Nurse's Drug Handbook, 7th Ed. Copyright © 2013 by The McGraw-Hill Companies, Inc. All rights reserved


Parasitology An antiprotozoal used to treat amebiasis, giardiasis, trichomoniasis, and H pylori infections in Pts with low-grade gastric lymphoma
McGraw-Hill Concise Dictionary of Modern Medicine. © 2002 by The McGraw-Hill Companies, Inc.


An antibacterial and antiprotozoal drug similar to METRONIDAZOLE but with a longer duration of action. It is used to treat AMOEBIASIS, TRICHOMONIASIS and GINGIVITIS. A brand name is Fastigyn.
Collins Dictionary of Medicine © Robert M. Youngson 2004, 2005
References in periodicals archive ?
Alternative suppressive regimens with more limited experience include oral nitroimidazole (metronidazole or tinidazole 500 mg twice daily for 7 days) followed by intravaginal boric acid 600 mg daily for 21 days and then suppressive 0.75% metronidazole gel twice weekly for 4 to 6 months.
The individual stock standard solutions of metronidazole, ornidazole, tinidazole, ofloxacin, ciprofloxacin, and enrofloxacin were prepared in methanol at the concentration of 1 mg/mL.
[9] The patients were randomly assigned to receive one of the three regimens including PPI with amoxicillin and tinidazole, i.e., omeprazole 20 mg bid, amoxicillin 500 mg tds and tinidazole 500 mg bid (OAT regimen); lansoprazole 30 mg bid, amoxicillin 500 mg tds, and tinidazole 500 mg bid (LAT regimen); rabeprazole 20 mg, amoxicillin 500 mg tds., and tinidazole 500 mg bid (RAT regimen).
Any of oral metronidazole 2 g orally stat, oral tinidazole 2 g orally stat, or metronidazole 500mg orally twice a day for 7 days, can be prescribed.
Metronidazole and tinidazole are approved for use in all the above mentioned disorders including amoebic liver abscess.
Sobel, "Guidelines for the treatment of bacterial vaginosis: Focus on tinidazole," Therapeutics and Clinical Risk Management, vol.
Tinidazole, the only other recommended drug for trichomoniasis, is closely related to metronidazole, and there are essentially no data on cross-reactivity.
Thus we can only presume that he might have sensitivity to any of the components of the different FDCs he consumed, namely tinidazole or ornidazole (but not to metronidazole), and ciprofloxacin or ofloxacin.
After acquiring all the information and per rectal examination animals were treated for septic metritis with combinations of drugs like Ciprofloxacin and Tinidazole combination (Cflox Tz IU (a)) @ 60 ml intrauterine.
The company launched: dipyridamole tablets, USP; quetiapine fumarate tablets; tinidazole tablets; hydromorphone hydrochloride oral solution, USP; nevirapine oral suspension; montelukast sodium tablets; montelukast sodium chewable tablets; oxcarbazepine oral suspension; irbesartan and hydrochlorothiazide tablets, USP; and irebesartan tablets, USE
However Sangameshwar Hospital showed both Metronidazole and Tinidazole prescribed for 7 (36.84%) patients each out of 19.
The standard drugs used for treating trichomoniasis are metronidazole (Flagyl) and tinidazole (Tindamax).