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# Miconazole Vaginal Pessary
## Overview
Miconazole is an imidazole antifungal agent. The vaginal pessary is a solid dosage form inserted vaginally.
## Primary Indications
Treatment of vulvovaginal candidiasis (yeast infection).
## Adult Dosing
* **Dosage:** One 100 mg vaginal pessary inserted vaginally once daily at bedtime for 7 days, OR one 200 mg vaginal pessary inserted vaginally once daily at bedtime for 3 days, OR one 1200 mg vaginal pessary inserted vaginally as a single dose.
* **Max Dose:** Single 1200 mg dose is the maximum single dose.
## Pediatric Dosing
The use of miconazole vaginal pessaries in pediatric patients is generally not recommended due to lack of specific data and the availability of other formulations. Consultation with a healthcare provider is recommended for appropriate treatment in this population.
## Dose Adjustments
No specific dose adjustments are necessary for renal or hepatic impairment due to minimal systemic absorption.
## Contraindications
Hypersensitivity to miconazole or any component of the formulation.
## Adverse Effects
Common: Vaginal burning, itching, irritation.
Less Common: Lower abdominal cramping, headache.
## Key Drug Interactions
Miconazole is a moderate inhibitor of CYP3A4 and CYP2C9.
* **Warfarin:** Increased INR and risk of bleeding. Monitor INR closely. May require warfarin dose adjustment.
* **Other CYP3A4 Substrates:** Increased plasma concentrations of other drugs metabolized by CYP3A4 (e.g., simvastatin, atorvastatin, some calcium channel blockers, tacrolimus). Avoid concurrent use if possible.
* **CYP2C9 Substrates:** Increased plasma concentrations of other drugs metabolized by CYP2C9 (e.g., phenytoin, sulfonylureas). Monitor therapeutic drug levels.
## Monitoring
* Monitor for signs and symptoms of vulvovaginal candidiasis.
* Monitor for vaginal irritation or burning.
* Monitor INR if co-administered with warfarin.
## Clinical Pearls
* Ensure the pessary is fully inserted to maximize efficacy.
* Patient education: Advise patients to complete the full course of treatment, even if symptoms improve. Avoid intercourse during treatment. If symptoms do not improve after completion of therapy, or if they worsen, the patient should consult a healthcare provider.
* Lubrication may be needed for insertion.
* The vaginal area may become softened or weakened by the formulation, leading to possible damage to latex condoms or diaphragms; therefore, concomitant use of latex barrier contraceptives is not recommended.
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*Disclaimer: This information is intended for clinical use and does not replace professional judgment. Always consult the most current prescribing information and relevant literature for complete details and to verify dosages and recommendations.*
