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# Miconazole Vaginal Pessary
## Overview
Miconazole is an imidazole antifungal that inhibits the synthesis of ergosterol, a vital component of fungal cell membranes. It is primarily used for the treatment of vulvovaginal candidiasis.
## Primary Indications
* Vulvovaginal candidiasis (yeast infection).
## Adult Dosing
* **100 mg pessary:** 1 pessary inserted intravaginally once daily at bedtime for 7 consecutive days.
* **200 mg pessary:** 1 pessary inserted intravaginally once daily at bedtime for 3 consecutive days.
* **1200 mg pessary:** 1 pessary inserted intravaginally as a single dose at bedtime.
## Pediatric Dosing
* **Children < 12 years:** Use is not recommended without clinical evaluation by a physician to rule out other causes of vulvovaginitis.
* **Adolescents (≥ 12 years):** Same as adult dosing.
## Dose Adjustments
* **Renal/Hepatic Impairment:** No systemic dose adjustment required due to minimal systemic absorption.
## Contraindications
* Hypersensitivity to miconazole or any component of the formulation.
* History of recurrent yeast infections (greater than 3 episodes in 12 months) requires formal diagnosis.
## Adverse Effects
* **Local/Genital:** Vulvovaginal burning, itching, irritation, or pelvic cramping.
* **Dermatologic:** Skin rash or urticaria (rare).
* **Systemic:** Extremely rare due to negligible absorption, but watch for signs of hypersensitivity.
## Key Drug Interactions
* **Warfarin:** Although systemic absorption is low, systemic azole antifungals can inhibit CYP2C9 and CYP3A4, potentially increasing the International Normalized Ratio (INR). Monitor closely if the patient is on warfarin therapy.
## Monitoring
* **Efficacy:** Resolution of symptoms (itching, discharge, burning).
* **Safety:** Monitor for local irritation or allergic contact dermatitis. If symptoms persist after the recommended course, discontinue use and evaluate for alternative diagnoses (e.g., bacterial vaginosis, trichomoniasis).
## Clinical Pearls
* **Compliance:** Complete the full course of therapy even if symptoms resolve earlier to ensure mycological cure.
* **Barrier Contraception:** Miconazole can damage latex condoms and diaphragms; advise patients to use alternative contraception or abstain from intercourse during treatment.
* **Administration:** Insert as high into the vagina as possible using the provided applicator or fingers.
* **Menstruation:** Therapy should not be interrupted if menstruation begins; use of sanitary pads is recommended (avoid tampons).
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**Educational Disclaimer:** This information is for educational purposes only. Clinical practice guidelines vary by region and institution. Always consult the latest package insert, formulary, or formal drug information resources before prescribing or administering medication.
