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# Miconazole vaginal pessary
## Overview
Miconazole is an imidazole antifungal agent. Vaginal pessaries are designed for insertion into the vagina to treat vulvovaginal candidiasis.
## Primary Indications
Treatment of vulvovaginal candidiasis (yeast infection).
## Adult Dosing
* **100 mg pessary:** Insert 1 pessary vaginally at bedtime for 7 consecutive nights.
* **200 mg pessary:** Insert 1 pessary vaginally at bedtime for 3 consecutive nights.
* **200 mg pessary (ovule):** Insert 1 ovule vaginally at bedtime for 1 night.
* **Higher strength formulations (e.g., 1200 mg single dose ovule):** Insert 1 ovule vaginally as a single dose.
Specific dosing frequency and duration may vary based on product labeling and clinical judgment.
## Pediatric Dosing
Data for pediatric use of miconazole vaginal pessaries is limited. Generally not recommended for girls under 12 years of age unless directed by a healthcare provider. If used in adolescents (12 years and older), follow adult dosing.
## Dose Adjustments
No dose adjustment is typically required for renal or hepatic impairment as systemic absorption is minimal.
## Contraindications
* Hypersensitivity to miconazole or any component of the formulation.
## Adverse Effects
* **Common:** Vulvovaginal burning or itching, vaginal irritation, pelvic cramps.
* **Less Common:** Rash, redness, swelling.
## Key Drug Interactions
* **Warfarin:** Miconazole (especially oral or high-dose vaginal formulations) can inhibit CYP2C9, potentially increasing warfarin levels and bleeding risk. Monitor INR closely if concurrent use is necessary.
* **CYP3A4 Substrates:** Miconazole can inhibit CYP3A4, potentially increasing plasma concentrations of drugs metabolized by this enzyme (e.g., some calcium channel blockers, benzodiazepines, statins). However, systemic absorption of vaginal miconazole is low, so significant interactions are less likely compared to oral formulations.
## Monitoring
* Monitor for signs and symptoms of vulvovaginal candidiasis resolution.
* Monitor for adverse effects, particularly local irritation.
* If using concurrently with warfarin, monitor INR.
## Clinical Pearls
* Complete the full course of therapy as directed, even if symptoms improve sooner.
* Avoid sexual intercourse during treatment.
* Patient education on proper insertion technique is important.
* May weaken latex condoms and diaphragms; consider alternative contraception during treatment and for several days after.
* If symptoms persist after completing therapy or recur, re-evaluate the diagnosis and consider alternative treatment.
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**Disclaimer:** This information is intended for healthcare professionals. Always consult the official prescribing information and local protocols for complete and up-to-date guidance before prescribing.
