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# Miconazole Vaginal Pessary ## Overview Miconazole is an imidazole antifungal agent used to treat vaginal yeast infections (vulvovaginal candidiasis). It works by inhibiting the synthesis of ergosterol, a key component of fungal cell membranes. ## Primary Indications * Treatment of vulvovaginal candidiasis. ## Adult Dosing * **100 mg vaginal pessary:** Insert one pessary vaginally once daily at bedtime for 7 days. * **200 mg vaginal pessary:** Insert one pessary vaginally once daily at bedtime for 3 days. * **150 mg vaginal suppository (if a pessary is not available):** Insert one suppository vaginally once daily at bedtime for 3 days. *Note: While referred to as "pessaries," these formulations are typically suppositories inserted into the vagina.* ## Pediatric Dosing Dosing in pediatric patients (under 16 years) has not been established. Use with caution and consider alternative treatments if available. ## Dose Adjustments No dose adjustments are typically required 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, pelvic cramps. * **Less Common:** Rash, hives. ## Key Drug Interactions * **Warfarin:** Miconazole can inhibit the metabolism of warfarin, potentially increasing the risk of bleeding. Monitor INR closely and consider alternative antifungal agents if feasible. ## Monitoring * Monitor for signs of clinical improvement (reduction in itching, burning, and discharge). * Monitor for any signs of local irritation or allergic reaction. ## Clinical Pearls * Complete the full course of treatment, even if symptoms improve earlier. * Avoid sexual intercourse during treatment to prevent irritation and potential transmission to a partner. * Cotton underwear is recommended. * The pessary/suppository may weaken latex condoms and diaphragms, reducing their effectiveness. Advise patients to use non-latex condoms or alternative birth control methods during and for 72 hours after treatment. *** *Disclaimer: This information is intended for clinical use and is not a substitute for professional medical advice. Always consult the most current prescribing information and relevant clinical guidelines before making any treatment decisions.*