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# Miconazole vaginal pessary
## Overview
Miconazole is an imidazole antifungal agent. The vaginal pessary is formulated for local treatment of vaginal yeast infections.
## Primary Indications
Vulvovaginal candidiasis (yeast infection).
## Adult Dosing
**Intravaginal:**
* **100 mg pessary:** Insert 1 pessary vaginally once daily at bedtime for 7 days.
* **200 mg pessary:** Insert 1 pessary vaginally once daily at bedtime for 3 days.
* **High-strength (e.g., 1200 mg) pessary:** Insert 1 pessary vaginally as a single dose at bedtime.
## Pediatric Dosing
Safety and efficacy in pediatric patients have not been established.
## Dose Adjustments
No dose adjustments are necessary for hepatic or renal impairment.
## Contraindications
Hypersensitivity to miconazole or any component of the formulation.
## Adverse Effects
Common: Vaginal burning, itching, irritation.
Less common: Abdominal pain, headache, rash.
## Key Drug Interactions
* **Warfarin:** Miconazole can inhibit the metabolism of warfarin, increasing the risk of bleeding. Monitor INR closely if used concurrently.
* **CYP3A4 substrates (e.g., certain statins, benzodiazepines, calcium channel blockers):** Miconazole may inhibit CYP3A4, potentially increasing the plasma concentrations of these drugs. This interaction is less likely to be clinically significant with vaginal administration compared to oral or IV routes, but caution is advised.
## Monitoring
* Monitor for signs and symptoms of vaginal candidiasis.
* Monitor for adverse effects.
* If concomitant warfarin therapy, monitor INR.
## Clinical Pearls
* Complete the full course of therapy as prescribed, even if symptoms improve.
* Avoid sexual intercourse during treatment.
* Treatment may weaken latex condoms and diaphragms, increasing the risk of breakage. Advise patients to use alternative birth control methods.
* If symptoms do not improve after completing therapy, re-evaluate the diagnosis.
* Consider oral fluconazole for recurrent or complicated infections, though miconazole vaginal therapy is generally effective for uncomplicated infections.
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**Disclaimer:** This information is intended for healthcare professionals. It is essential to consult the most current prescribing information and relevant guidelines for complete and up-to-date details before making clinical decisions.
