Generic Name: Terconazole
VA Class: GU300
Chemical Name: cis - 1 - [4 - [2 - (2,4 - Dichlorophenyl) - 2 - (1H - 1,2,4 - triazol - 1 - ylmethyl) - 1,3 - dioxolan - 4 - yl]methoxy]phenyl] - 4 - (1 - methylethyl)piperazine
Molecular Formula: C26H31Cl2N5O3
CAS Number: 67915-31-5
Uses for Terazol
Treatment of uncomplicated vulvovaginal candidiasis (mild to moderate, sporadic or infrequent, most likely caused by Candida albicans, occurring in immunocompetent women).1 3 5 15 16 17 18 19 20 21 22 23 24 27 33 37 47 49 65 67 68 A drug of choice.37 47 51 52 53 54 56 57 58 65 67 68
Treatment of complicated vulvovaginal candidiasis, including infections that are recurrent (≥4 episodes in 1 year), severe (extensive vulvar erythema, edema, excoriation, fissure formation), caused by Candida other than C. albicans, or occurring in women with underlying medical conditions (uncontrolled diabetes mellitus, HIV infection, immunosuppressive therapy, pregnancy).47 53 54 56 57 58 67 68 Complicated infections generally require more prolonged treatment than uncomplicated infections.47 66 67 68
Optimal regimens for treatment of vulvovaginal candidiasis caused by Candida other than C. albicans (e.g., C. glabrata, C. krusei) not identified.47 68 CDC and others state these infections may respond to an intravaginal azole antifungal given for 7–14 days or to a 14-day regimen of intravaginal boric acid (not commercially available in the US).47 68 69
Terazol Dosage and Administration
Intravaginal Topical Administration
Administer intravaginally as a cream or suppository.1
Uncomplicated Vulvovaginal Candidiasis
Complicated Vulvovaginal Candidiasis
Recurrent Vulvovaginal Infections Caused by Candida albicansIntravaginal
CDC and others recommend an initial intensive regimen (7–14 days of an intravaginal azole or 3-dose regimen of oral fluconazole) to achieve mycologic remission, followed by an appropriate maintenance regimen (6-month regimen of once-weekly oral fluconazole or, alternatively, an intravaginal azole given intermittently).47 52 54 58 64 67 68
Other Complicated Vulvovaginal InfectionsIntravaginal
CDC and others recommend 7–14 days of an intravaginal azole for vulvovaginal candidiasis that is severe, caused by Candida other than C. albicans, or occurring in women with underlying medical conditions.47 67
HIV-infected patients: Use same regimen recommended for other patients.47 66 Some experts recommend a duration of 3–7 days.66 Maintenance regimen of an intravaginal azole can be considered for those with recurrent episodes;66 routine primary or secondary prophylaxis (long-term suppressive or chronic maintenance therapy) not recommended.47 66
No specific dosage recommendations at this time.a
No specific dosage recommendations at this time.a
No specific dosage recommendations at this time.a
Cautions for Terazol
Known hypersensitivity to terconazole or any ingredient in the formulation.1
Possible flu-like syndrome, characterized by fever, chills, headache, and/or hypotension and occasionally by vertigo and nausea.45 May be immunoallergenic45 or may be a reaction to the dying fungi (similar to the Jarisch-Herxheimer reaction observed during penicillin therapy for syphilis).46
If irritation, sensitization, fever, chills, or flu-like symptoms occur and appear to be drug related, discontinue and do not reinstitute terconazole therapy.1
Photosensitivity reactions reported following repeated topical application to the skin of 0.8 or 2% terconazole cream and exposure to filtered artificial ultraviolet light; not reported to date following intravaginal administration of 0.4 or 0.8% cream or 80-mg suppositories.1 3
Use of Latex/Rubber Contraceptive Diaphragms
Hydrogenated vegetable oil base contained in terconazole vaginal suppositories may interact with certain rubber or latex products such as vaginal contraceptive diaphragms; concurrent use not recommended.1 Consider use of terconazole vaginal cream as an alternative to the suppositories.43 44
Selection and Use of Antifungals for Vulvovaginal Candidiasis
Prior to initial use of terconazole in a woman with signs and symptoms of vulvovaginal candidiasis, confirm the diagnosis by demonstrating yeast or pseudohyphae with direct microscopic examination of vaginal discharge (saline or 10% potassium hydroxide [KOH] wet mount or Gram stain) or by culture.1 47
Candida identified by culture in the absence of symptoms is not an indication for antifungal treatment since approximately 10–20% of women harbor Candida or other yeasts in the vagina.47
If clinical symptoms persist, tests should be repeated to rule out other pathogens and to confirm the original diagnosis.1
Because terconazole is absorbed systemically following intravaginal administration, manufacturer states the drug should not be used during the first trimester of pregnancy unless the clinician considers it essential to the welfare of the patient.1 CDC and others state that a 7-day regimen of an intravaginal azole antifungal can be used, if necessary, for treatment of vulvovaginal candidiasis in pregnant women.47 67
Insufficient experience from clinical studies to determine whether patients ≥65 years of age respond differently than younger adults.1 Other clinical experience has not identified age-related differences in response.1
Common Adverse Effects
Interactions for Terazol
Small amounts of terconazole (about 5–16% of a dose) are slowly absorbed systemically following intravaginal administration.1 3 14 The amount of drug absorbed is proportional to the dose (regardless of dosage form)3 14 and absorption is similar in women with or without vulvovaginal candidiasis.3
Distribution into body tissues and fluids following intravaginal administration has not been determined.a
Following oral administration, half-life is 6.9 hours.1
Presumably exerts its antifungal activity by altering cellular membranes resulting in increased membrane permeability, leakage of essential elements (e.g., amino acids, potassium), and impaired uptake of precursor molecules (e.g., purine and pyrimidine precursors to DNA).3 4 8 12 34 Inhibits cytochrome P-450 14-α-desmethylase in susceptible fungi, which leads to accumulation of C-14 methylated sterols (e.g., lanosterol) and decreased concentrations of ergosterol.3 4 6 8 12 28 34
Spectrum of antifungal activity includes many fungi, including yeasts and dermatophytes.3 7 8 10 11 12 14 15 31 At high concentrations, has some in vitro activity against gram-positive and -negative bacteria.7 11 25 31 34
Dermatophytes and other fungi: Active in vitro against Trichophyton mentagrophytes,3 11 31 T. rubrum,3 11 31 T. tonsurans,3 11 T. verrucosum,3 11 and Epidermophyton floccosum.3 11 Also active against Cryptococcus neoformans.3 11 31
Advice to Patients
Importance of reading and understanding manufacturer’s patient instructions regarding use of applicator for intravaginal administration.1
Importance of informing clinicians if irritation, sensitization, fever, chills, or flu-like symptoms occur.1
Importance of women following clinician's advice regarding sexual intercourse and informing partner to seek medical advice if penile itching, redness, or discomfort occurs.1
Importance of not using rubber or latex products such as vaginal contraceptive diaphragms when using terconazole vaginal suppositories;1 use of terconazole vaginal cream should be considered as an alternative.43 44
Importance of informing clinicians of existing or contemplated concomitant therapy, including prescription and OTC drugs.1
Importance of women informing clinicians if they are or plan to become pregnant or plan to breast-feed.1
Importance of informing patients of other important precautionary information. (See Cautions.)
Excipients in commercially available drug preparations may have clinically important effects in some individuals; consult specific product labeling for details.
Please refer to the ASHP Drug Shortages Resource Center for information on shortages of one or more of these preparations.
* available from one or more manufacturer, distributor, and/or repackager by generic (nonproprietary) name
Terazol 7 (with propylene glycol; with applicator)
Terconazole Vaginal Cream
Terazol 3 (with propylene glycol; with applicator)
Terconazole Vaginal Cream
Terazol 3 (in a hydrogenated vegetable oil base; with applicator)
Terconazole Vaginal Suppositories (in a hydrogenated vegetable oil base; with applicator)
AHFS DI Essentials. © Copyright 2017, Selected Revisions July 1, 2007. American Society of Health-System Pharmacists, Inc., 7272 Wisconsin Avenue, Bethesda, Maryland 20814.
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3. Ortho Pharmaceutical Corporation. Terazol (terconazole 0.4% cream/80 mg suppositories) clinical monograph. Raritan, NJ; 1988 Jun.
4. Wilborn WH, Shields RL, Hyde BM et al. Mode of action of terconazole on Candida albicans as shown by scanning and transmission electron microscopy during treatment for vulvovaginal candidiasis. Am J Gynecol Health. 1988; 2:51-6.
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44. Reviewers’ comments (personal observations); 1988 Dec.
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More about Terazol (terconazole topical)
- Other brands: Zazole