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# Miconazole vaginal pessary
## Overview
Miconazole is an imidazole antifungal agent that inhibits the synthesis of ergosterol, a vital component of fungal cell membranes. Administered vaginally, it treats vulvovaginal candidiasis.
## Primary Indications
Treatment of vulvovaginal candidiasis (yeast infection).
## Adult Dosing
* **100 mg vaginal suppository:** Insert one suppository vaginally once daily at bedtime for 7 days.
* **200 mg vaginal suppository:** Insert one suppository vaginally once daily at bedtime for 3 days.
* **150 mg vaginal suppository:** Insert one suppository vaginally once daily at bedtime for 1 day.
The choice of regimen (duration and strength) may depend on clinical guidelines or prescriber preference.
## Pediatric Dosing
Safety and efficacy in pediatric patients younger than 12 years are not established for vaginal formulations. Use is generally not recommended.
## Dose Adjustments
No dose adjustments are typically necessary for renal or hepatic impairment due to minimal systemic absorption.
## Contraindications
* Known hypersensitivity to miconazole or any component of the formulation.
## Adverse Effects
* **Common:** Vulvovaginal burning, itching, irritation, pain, cramping.
* **Less Common/Rare:** Rash, urticaria, headache.
## Key Drug Interactions
* **Warfarin:** Miconazole can inhibit CYP2C9, potentially increasing INR and the risk of bleeding. Monitor INR closely if coadministered. Dose adjustments of warfarin may be necessary.
## Monitoring
* Clinical response to therapy.
* Signs and symptoms of hypersensitivity or severe local irritation.
* For patients on warfarin, monitor INR.
## Clinical Pearls
* Treatment is typically most effective when administered at bedtime to minimize leakage and maximize contact time.
* Avoid intercourse during treatment to prevent reinfection of the partner and potential irritation.
* Complete the entire course of therapy as prescribed, even if symptoms improve earlier.
* If symptoms do not improve after completing the course, or if they worsen, re-evaluate for alternative diagnoses or resistance.
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*Disclaimer: This information is intended for healthcare professionals. Always consult the most current prescribing information and relevant clinical guidelines before making therapeutic decisions.*
