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# Miconazole Vaginal Pessary ## Overview Miconazole is an imidazole antifungal agent used to treat vaginal yeast infections (vulvovaginal candidiasis). ## Primary Indications Treatment of vulvovaginal candidiasis. ## Adult Dosing Available as a 100 mg, 200 mg, or 1200 mg vaginal insert (pessary). * **100 mg vaginal insert:** Insert one pessary vaginally at bedtime for 7 days. * **200 mg vaginal insert:** Insert one pessary vaginally at bedtime for 3 days. * **1200 mg vaginal insert:** Insert one pessary vaginally at bedtime as a single dose. ## Pediatric Dosing Safety and efficacy in pediatric patients have not been established. Consult current guidelines or a specialist if considering use in this population. ## Dose Adjustments No dose adjustments are necessary for hepatic or renal impairment. ## Contraindications 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 Miconazole is a moderate inhibitor of CYP3A4 and CYP2C9. * **Warfarin:** Concomitant use may increase the risk of bleeding. Monitor INR closely and consider dose adjustments of warfarin. * **Other CYP3A4 substrates (e.g., simvastatin, lovastatin, cyclosporine, tacrolimus, sirolimus, fentanyl):** Increased plasma concentrations may occur, potentially leading to toxicity. Concurrent use is generally not recommended. ## Monitoring * Assess for symptom relief (itching, burning, discharge). * Monitor for signs of local irritation or allergic reaction. ## Clinical Pearls * The 1200 mg single-dose formulation is often preferred for convenience and potentially better compliance. * Avoid sexual intercourse during treatment. * Miconazole vaginal products can weaken latex condoms and diaphragms, making them less effective. Advise patients to use alternative birth control methods during and for at least 72 hours after treatment. *** *Disclaimer: This information is intended for healthcare professionals. Always consult the most current prescribing information and institutional protocols before making clinical decisions.*