What is a Generic Drug?

A generic drug is a copy of the brand-name drug with the same dosage, safety, strength, quality, consumption method, performance, and intended use. Before generics become available on the market, the generic company must prove it has the same active ingredients as the brand-name drug and works in the same way and in the same amount of time in the body.

The only differences between generics and their brand-name counterparts is that generics are less expensive and may look slightly different (eg. different shape or color), as trademarks laws prevent a generic from looking exactly like the brand-name drug.

Generics are less expensive because generic manufacturers don't have to invest large sums of money to develop a drug. When the brand-name patent expires, generic companies can manufacture a copy of the brand-name and sell it at a substantial discount.

Fasigyn (Tinidazole)


Fasigyn (Tinidazole)

Prescription Required


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  • Product Details


    Fasigyn is a prescription medication your doctor may give for the treatment of either a bacterial or parasitic infection. It can treat the following:

    • Amebiasis in patients three years and older
    • Bacterial vaginosis in non-pregnant adult women
    • Giardiasis in patients three years and older
    • Trichomoniasis

    Fasigyn enters the infective organism and damages DNA to prevent cellular replication. This process helps to prevent further infection and allows the body to fight the organism.


    The dosage will be determined by your healthcare provider, depending on the disease being treated.


    The active ingredient in Fasigyn is tinidazole.


    Common drug-drug interactions with this medication can include:

    • Alcohol
    • Bacillus clausii
    • BCG (Intravesical)
    • BCG Vaccine
    • Cholera Vaccine
    • Disulfiram
    • Immune Checkpoint Inhibitors
    • Lactobacillus and Estriol
    • Sodium Picosulfate
    • Typhoid Vaccine


    Do not take Fasgyn for longer than prescribed. A similar medication has shown carcinogenicity in animal trials.

    Tell your doctor if you have a history of seizures or peripheral neuropathy.

    Use with caution if you have a history of blood disorders.

    Tell your doctor if you have a history of liver problems before starting this drug.

    Side Effects

    The most common adverse reactions may include the following. Tell your doctor or pharmacist if you experience any of these:

    • Abdominal cramps
    • Abdominal pain
    • Angioedema
    • Anorexia
    • Arthralgia
    • Arthritis
    • Asthenia
    • Ataxia
    • Bitter taste
    • Bronchospasm
    • Burning sensation
    • Candidiasis
    • Coma
    • Confusion
    • Constipation
    • Dark urine
    • Decreased appetite
    • Depression
    • Diaphoresis
    • Diarrhea
    • Dizziness
    • Drowsiness
    • Dysgeusia
    • Dyspepsia
    • Dyspnea
    • Dysuria
    • Epigastric discomfort
    • Erythema multiforme
    • Fatigue
    • Fever
    • Flatulence 
    • Flushing
    • Hairy tongue
    • Headache
    • Heavy menstrual bleeding
    • Hypersensitivity reaction
    • Increased serum transaminases
    • Increased thirst
    • Insomnia
    • Leukopenia
    • Malaise
    • Metallic taste
    • Myalgia
    • Nausea
    • Neutropenia
    • Oral candidiasis
    • Palpitations
    • Pelvic pain
    • Peripheral neuropathy
    • Pharyngitis
    • Pruritus
    • Salivation
    • Seizure
    • Skin rash
    • Stevens-Johnson syndrome
    • Stomatitis
    • Thrombocytopenia
    • Tongue discoloration
    • Upper respiratory tract infection
    • Urinary tract infection
    • Urine abnormality
    • Urticaria
    • Vaginal discharge
    • Vertigo
    • Vomiting
    • Vulvovaginal candidiasis
    • Vulvovaginal disease
    • Xerostomia


    Tinidazole [package insert]. San Antonio, TX: Mission Pharmacal Company; 2004.

    IMPORTANT NOTE: The above information is intended to increase awareness of health information and does not suggest treatment or diagnosis. This information is not a substitute for individual medical attention and should not be construed to indicate that use of the drug is safe, appropriate, or effective for you. See your health care professional for medical advice and treatment.

    Product Code : 9721

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