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# Miconazole Vaginal Pessary
## Overview
Miconazole is an imidazole antifungal agent that inhibits ergosterol synthesis, a vital component of fungal cell membranes.
## Primary Indications
Treatment of vulvovaginal candidiasis (yeast infection).
## Adult Dosing
* **100 mg vaginal pessary:** Insert 1 pessary vaginally at bedtime for 7 nights.
* **200 mg vaginal pessary:** Insert 1 pessary vaginally at bedtime for 3 nights.
* **100 mg vaginal suppository:** Insert 1 suppository vaginally at bedtime for 7 nights.
* **200 mg vaginal suppository:** Insert 1 suppository vaginally at bedtime for 3 nights.
* **10% vaginal ointment:** Insert one applicatorful (approximately 5g) vaginally at bedtime for 7 nights.
## Pediatric Dosing
Safety and efficacy in pediatric patients under 12 years of age have not been established. Use is generally not recommended.
## Dose Adjustments
No specific dose adjustments are typically required for hepatic or renal impairment due to minimal systemic absorption.
## Contraindications
Known hypersensitivity to miconazole or any component of the formulation.
## Adverse Effects
Common side effects include vaginal itching, burning, and irritation. Abdominal cramping may also occur.
## Key Drug Interactions
Miconazole, especially when administered systemically or in high doses, can inhibit CYP3A4 enzymes. Concomitant use with CYP3A4 substrates (e.g., warfarin, certain statins, benzodiazepines) may increase plasma concentrations of these drugs, leading to potential toxicity. While systemic absorption from vaginal administration is generally low, caution is advised.
## Monitoring
* Monitor for signs and symptoms of vaginal candidiasis.
* Assess for local irritation or allergic reaction.
## Clinical Pearls
* Complete the full course of treatment, even if symptoms improve earlier.
* Avoid sexual intercourse during treatment to prevent potential transmission or irritation.
* The use of tampons and douches should be avoided during treatment.
* Some formulations may weaken latex condoms and diaphragms; consider alternative contraception during treatment.
**Disclaimer:** This information is intended for healthcare professionals. Always consult the most current prescribing information and local protocols for definitive guidance.
