TERCONAZOLE- terconazole suppository
Padagis Israel Pharmaceuticals Ltd

Rx Only


Terconazole Vaginal Suppositories, 80 mg are white to off-white suppositories for intravaginal administration containing 80 mg of the antifungal agent terconazole, cis -1-[p -[[2-(2,4-Dichlorophenyl)-2- (1H -1,2,4-triazol-1-ylmethyl)-1,3-dioxolan-4-yl]methoxy]phenyl]-4- isopropylpiperazine, in triglycerides derived from coconut and/or palm kernel oil (a base of hydrogenated vegetable oils) and butylated hydroxyanisole.

The structural formula of terconazole is as follows:

Structural Formula.jpg
(click image for full-size original)

Terconazole, a triazole derivative, is a white to almost white powder with a molecular weight of 532.47. It is insoluble in water; sparingly soluble in ethanol; and soluble in butanol.


Absorption — Following a single intravaginal application of a suppository containing 240 mg 14 C-terconazole to healthy women, approximately 70% (range: 64-76%) of terconazole remains in the vaginal area during the suppository retention period (16 hours); approximately 10% (range: 5-16%) of the administered radioactivity was absorbed systemically over 7 days. Maximum plasma concentrations of terconazole occur 5 to 10 hours after intravaginal application of the suppository. Systemic exposure to terconazole is approximately proportional to the applied dose. The rate and extent of absorption of terconazole are similar in patients with vulvovaginal candidiasis (pregnant or non-pregnant) and healthy subjects.

Distribution — Terconazole is highly protein bound (94.9%) in human plasma and the degree of binding is independent of drug concentration over the range of 0.01 to 5.0 mcg/mL.

Metabolism — Systemically absorbed terconazole is extensively metabolized (>95%).

Elimination — Across various studies in healthy women, after single or multiple intravaginal administration of terconazole, the mean elimination half-life of unchanged terconazole ranged from 6.4 to 8.5 hours. Following a single intravaginal administration of a suppository containing 240 mg 14 C-terconazole to hysterectomized or tubal ligated women, approximately 3 to 10% (mean ± SD: 5.7 ± 3.0%) of the administered radioactivity was eliminated in the urine and 2 to 6% (mean ± SD: 4.2 ± 1.6%) was eliminated in the feces during the 7-day collection period.

Multiple Dosing — There is no significant increase in maximum plasma concentration or overall exposure (AUC) after multiple daily applications of the suppositories for 3 days.

Photosensitivity reactions have not been observed in U.S. and foreign clinical trials in patients who were treated with terconazole suppositories.


Mechanism of action – Terconazole, an azole antifungal agent, inhibits fungal cytochrome P-450-mediated 14 alpha-lanosterol demethylase enzyme. This enzyme functions to convert lanosterol to ergosterol. The accumulation of 14 alpha-methyl sterols correlates with the subsequent loss of ergosterol in the fungal cell wall and may be responsible for the antifungal activity of terconazole. Mammalian cell demethylation is less sensitive to terconazole inhibition.

Activity in vitro Terconazole exhibits antifungal activity in vitro against Candida albicans and other Candida species. The MIC values of terconazole against most Lactobacillus spp. typically found in the human vagina were ≥128 mcg/mL; therefore these beneficial bacteria are not affected by drug treatment.


Terconazole Vaginal Suppositories, 80 mg are indicated for the local treatment of vulvovaginal candidiasis (moniliasis). As this product is effective only for vulvovaginitis caused by the genus Candida, the diagnosis should be confirmed by KOH smears and/or cultures.


Patients known to be hypersensitive to terconazole or to any of the components of the suppositories.


Anaphylaxis and toxic epidermal necrolysis have been reported during terconazole therapy. Terconazole Vaginal Suppositories, 80 mg therapy should be discontinued if anaphylaxis or toxic epidermal necrolysis develops.


General –

For vulvovaginal use only. Terconazole Vaginal Suppositories, 80 mg is not for ophthalmic or oral use. Discontinue use and do not retreat with terconazole if sensitization, irritation, fever, chills or flu-like symptoms are reported during use.

The base contained in the suppository formulation may interact with certain rubber or latex products, such as those used in vaginal contraceptive diaphragms or latex condoms; therefore concurrent use is not recommended.

Laboratory Tests –

If there is a lack of response to terconazole, appropriate microbiologic studies (standard KOH smear and/or cultures) should be repeated to confirm the diagnosis and rule out other pathogens.

Drug Interactions –

The therapeutic effect of terconazole is not affected by oral contraceptive usage.

The levels of estradiol and progesterone did not differ significantly when 0.8% terconazole vaginal cream was administered to healthy female volunteers established on a low dose oral contraceptive.

Carcinogenesis, Mutagenesis, Impairment of Fertility

Carcinogenesis –

Studies to determine the carcinogenic potential of terconazole have not been performed.

Mutagenicity –

Terconazole was not mutagenic when tested in vitro for induction of microbial point mutations (Ames test), or for inducing cellular transformation, or in vivo for chromosome breaks (micronucleus test) or dominant lethal mutations in mouse germ cells.

Impairment of Fertility –

No impairment of fertility occurred when female rats were administered terconazole orally up to 40 mg/kg/day for a three month period.

Pregnancy: Teratogenic Effects: Pregnancy Category C –

There was no evidence of teratogenicity when terconazole was administered orally up to 40 mg/kg/day (25x the recommended intravaginal human dose of the suppository formulation) in rats, or 20 mg/kg/day in rabbits, or subcutaneously up to 20 mg/kg/day in rats.

Dosages at or below 10 mg/kg/day produced no embryotoxicity; however, there was a delay in fetal ossification at 10 mg/kg/day in rats. There was some evidence of embryotoxicity in rabbits and rats at 20-40 mg/kg. In rats, this was reflected as a decrease in litter size and number of viable young and reduced fetal weight. There was also delay in ossification and an increased incidence of skeletal variants.

The no-effect dose of 10 mg/kg/day resulted in a mean peak plasma level of terconazole in pregnant rats of 0.176 mcg/mL which exceeds by 17 times the mean peak plasma level (0.010 mcg/mL) seen in normal subjects after intravaginal administration of terconazole 80 mg vaginal suppository. This safety assessment does not account for possible exposure of the fetus through direct transfer to terconazole from the irritated vagina by diffusion across amniotic membranes. Since terconazole is absorbed from the human vagina, it should not be used in the first trimester of pregnancy unless the physician considers it essential to the welfare of the patient.

Terconazole may be used during the second and third trimester if the potential benefit outweighs the possible risks to the fetus.

Nursing Mothers –

It is not known whether this drug is excreted in human milk. Animal studies have shown that rat offspring exposed via the milk of treated (40 mg/kg/orally) dams showed decreased survival during the first few post-partum days, but overall pup weight and weight gain were comparable to or greater than controls throughout lactation. Because many drugs are excreted in human milk, and because of the potential for adverse reaction in nursing infants from terconazole, a decision should be made whether to discontinue nursing or to discontinue the drug, taking into account the importance of the drug to the mother.

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