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# Miconazole Vaginal Pessary ## Overview Miconazole is an imidazole antifungal agent. Vaginal pessaries are designed for local vaginal administration. ## Primary Indications 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 (also referred to as a pessary):** Insert 1 suppository vaginally at bedtime for 7 days. * **200 mg vaginal suppository (also referred to as a pessary):** Insert 1 suppository vaginally at bedtime for 3 days. * **Higher strength formulations (e.g., 1200 mg single dose pessary) exist.** Dosing depends on the specific product. ## Pediatric Dosing Dosing in pediatric patients is not well-established for vaginal pessary formulations. Use should be guided by prescriber judgment and available product labeling. ## Dose Adjustments No dose adjustments are typically required for hepatic or renal impairment due to minimal systemic absorption. ## Contraindications * Known hypersensitivity to miconazole or any component of the formulation. ## Adverse Effects Common adverse effects include vaginal burning, itching, irritation, and lower abdominal cramping. ## Key Drug Interactions * **Warfarin:** Miconazole can inhibit CYP2C9, increasing warfarin levels and the risk of bleeding. Monitor INR closely and consider alternative antifungal agents or dose adjustments of warfarin. * **CYP3A4 substrates:** Miconazole can inhibit CYP3A4, potentially increasing the concentration of other drugs metabolized by this enzyme. ## Monitoring * Monitor for symptom resolution. * Monitor for signs of local irritation or allergic reaction. * If co-administered with warfarin, monitor INR closely. ## Clinical Pearls * Avoid sexual intercourse during treatment. * Pessaries may weaken latex condoms and diaphragms. * Treatment may be extended if symptoms do not improve. * If symptoms persist after completing therapy, re-evaluation for other causes or resistant organisms is warranted. *** *Disclaimer: This information is intended for healthcare professionals. Always consult the current prescribing information and relevant clinical guidelines for complete and up-to-date details before making any treatment decisions.*