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## Miconazole Vaginal Pessary ### Overview Miconazole is an imidazole antifungal agent. Vaginal pessaries are solid dosage forms inserted into the vagina. ### Primary Indications Treatment of vulvovaginal candidiasis (yeast infection). ### Adult Dosing * **Formulations:** Available as 100 mg, 200 mg, or 1200 mg vaginal suppositories (pessaries). * **100 mg:** Insert one 100 mg pessary vaginally at bedtime for 7 days. * **200 mg:** Insert one 200 mg pessary vaginally at bedtime for 3 days. * **1200 mg:** Insert one 1200 mg pessary vaginally as a single dose. ### Pediatric Dosing * Data for pediatric use of miconazole vaginal pessaries is limited. Safety and efficacy have not been established in children. Use should be based on clinical judgment. ### Dose Adjustments * No specific dose adjustments are required for renal or hepatic impairment. ### Contraindications * Hypersensitivity to miconazole or any component of the formulation. ### Adverse Effects * **Common:** Vulvovaginal burning, itching, irritation, redness, or pain. Headache. * **Less Common:** Abdominal pain, rash. ### Key Drug Interactions * **Warfarin:** Miconazole (especially oral or prolonged vaginal use) can inhibit CYP2C9, potentially increasing warfarin levels and INR. Monitor INR closely if coadministered. * **CYP3A4 Substrates:** Miconazole can inhibit CYP3A4, potentially increasing the levels of drugs metabolized by this enzyme (e.g., certain statins, calcium channel blockers, immunosuppressants). Caution and monitoring may be warranted. ### Monitoring * Monitor for signs and symptoms of vaginal infection. * Monitor for adverse effects. * If coadministered with warfarin, monitor INR regularly. ### Clinical Pearls * Vaginal pessaries should be inserted at bedtime to minimize leakage. * Treatment duration is typically 1, 3, or 7 days depending on the product strength. * Avoid intercourse during treatment. * Some formulations may weaken latex condoms and diaphragms; consider alternative methods of contraception if necessary. *** *This information is intended for clinical use and does not substitute for professional medical advice. Always consult current prescribing information and your healthcare provider to ensure the safe and effective use of medications.*