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# Miconazole Vaginal Pessary
## Overview
Miconazole is an azole antifungal that inhibits the synthesis of ergosterol, a vital component of the fungal cell membrane, leading to cell death. Vaginal pessaries (suppositories) are commonly used for the treatment of vulvovaginal candidiasis.
## Primary Indications
Treatment of vulvovaginal candidiasis (yeast infections).
## Adult Dosing
* **100 mg pessary:** Insert 1 pessary intravaginally daily at bedtime for 7 consecutive days.
* **200 mg pessary:** Insert 1 pessary intravaginally daily at bedtime for 3 consecutive days.
* **1200 mg pessary:** Insert 1 pessary intravaginally as a single one-time dose at bedtime.
## Pediatric Dosing
Safety and efficacy in pediatric patients (<12 years) have not been established. Use in adolescents should be supervised by a healthcare provider to confirm diagnosis.
## Dose Adjustments
No systemic dose adjustments are required due to low systemic absorption. If symptoms persist or recur within 2 months, reconsider the diagnosis.
## Contraindications
* Hypersensitivity to miconazole or any component of the formulation.
* Known sensitivity to other imidazole antifungals.
## Adverse Effects
* **Common:** Local burning, itching, irritation, or pelvic cramping.
* **Rare:** Contact dermatitis, headache, or allergic reaction (e.g., rash, swelling).
## Key Drug Interactions
* **Warfarin:** Theoretical risk of increased anticoagulant effect if systemic absorption occurs (rare).
* **Latex Products:** Miconazole can weaken latex condoms, diaphragms, or cervical caps. Avoid concurrent use of these barrier contraceptives.
## Monitoring
* Monitor for symptomatic improvement.
* Discontinue use and consult a physician if severe irritation, rash, or hypersensitivity develops.
## Clinical Pearls
* **Administration:** Pessaries are for intravaginal use only. Do not swallow.
* **Full Course:** Patients should complete the entire course, even if symptoms resolve earlier or menstruation begins.
* **Hygiene:** Advise patients to avoid tampons, douches, and spermicides while using the medication.
* **Diagnosis:** If this is the patient's first episode of "yeast infection" symptoms, consult a provider to rule out bacterial vaginosis or sexually transmitted infections.
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*Disclaimer: This information is for educational purposes and does not replace professional clinical judgment. Always verify dosages, contraindications, and drug interactions against current prescribing information (e.g., package inserts or clinical databases like Lexicomp/UpToDate) and local institutional protocols.*
