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# Miconazole Vaginal Pessary
## Overview
Miconazole is an imidazole antifungal agent. The vaginal pessary formulation is designed for localized vaginal administration.
## Primary Indications
Vulvovaginal candidiasis (yeast infection).
## Adult Dosing
* **100 mg pessary:** Insert one pessary vaginally at bedtime for 7 consecutive nights.
* **200 mg pessary:** Insert one pessary vaginally at bedtime for 3 consecutive nights.
* **100 mg/6.5 g vaginal cream (applied with applicator):** Insert one applicatorful (approximately 5 grams) vaginally at bedtime for 7 consecutive nights.
## Pediatric Dosing
Safety and efficacy in pediatric patients below the age of 12 years have not been established. Dosing for patients 12 years and older is the same as adult dosing.
## Dose Adjustments
No dose adjustments are typically required based on renal or hepatic impairment for vaginal formulations.
## Contraindications
Hypersensitivity to miconazole or any component of the formulation.
## Adverse Effects
Common adverse effects include vaginal itching, burning, irritation, and abdominal cramps.
## Key Drug Interactions
* **CYP3A4 Inhibitors/Substrates:** Miconazole is a potent inhibitor of CYP3A4. Concurrent use with other drugs metabolized by CYP3A4 (e.g., warfarin, some statins, calcium channel blockers, buspirone, sirolimus) can increase plasma concentrations of these drugs, potentially leading to toxicity. While systemic absorption from vaginal administration is generally low, caution is advised, especially with prolonged use or in patients with impaired systemic clearance.
* **Oral Contraceptives:** Some sources suggest potential for reduced efficacy of oral contraceptives due to possible alterations in gut flora, though clinical significance is uncertain.
## Monitoring
* Monitor for signs and symptoms of vaginal candidiasis resolution.
* Monitor for any signs of local irritation or allergic reaction.
## Clinical Pearls
* Ensure the pessary is fully inserted into the vagina.
* Avoid sexual intercourse during treatment.
* If symptoms persist after completing the course, re-evaluate the diagnosis and consider alternative therapy.
* Patients should be advised to wear a sanitary pad to prevent staining of undergarments.
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**Disclaimer:** This information is intended for healthcare professionals. Always consult the current prescribing information and relevant clinical guidelines for the most up-to-date and comprehensive drug information before making clinical decisions.