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# Miconazole Vaginal Pessary ## Overview Miconazole is an imidazole antifungal agent that works by inhibiting the synthesis of ergosterol, 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 days. * **200 mg vaginal pessary:** Insert 1 pessary vaginally at bedtime for 3 days. * **100 mg vaginal suppository:** Insert 1 suppository vaginally at bedtime for 7 days. * **200 mg vaginal suppository:** Insert 1 suppository vaginally at bedtime for 3 days. *Note: Pessaries and suppositories are used interchangeably. The 100 mg and 200 mg strengths are available in both forms.* ## Pediatric Dosing Dosing for pediatric patients is not well-established for vaginal pessaries/suppositories. Consultation with a pediatrician or infectious disease specialist is recommended. ## Dose Adjustments No dose adjustments are typically required for renal or hepatic impairment. ## Contraindications * Hypersensitivity to miconazole or any component of the formulation. ## Adverse Effects * **Common:** Vaginal irritation, burning, itching. * **Less Common:** Pelvic cramps, lower abdominal pain, rash. ## Key Drug Interactions * **CYP3A4 Inhibitors:** Miconazole is a potent inhibitor of CYP3A4. Concomitant use with substrates of CYP3A4 (e.g., certain statins, benzodiazepines, calcium channel blockers, warfarin) may increase plasma concentrations and the risk of toxicity. While systemic absorption from vaginal administration is generally low, caution is still advised. ## Monitoring * Monitor for symptom relief and signs of recurrence. * Assess for local irritation or allergic reactions. ## Clinical Pearls * Complete the full course of treatment even if symptoms improve earlier. * Avoid sexual intercourse during treatment to prevent potential reinfection or irritation. * If symptoms persist after completing treatment, re-evaluate diagnosis and consider alternative therapy. * Pessaries may cause leakage of the medication; consider wearing a pad. *** *This information is intended for clinical use and does not replace professional medical advice. Always verify current prescribing information and consult with a healthcare professional before making any treatment decisions.*