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# Miconazole Vaginal
## Overview
Miconazole is an imidazole antifungal agent. Vaginal formulations are used to treat vulvovaginal candidiasis (yeast infections).
## Primary Indications
* Treatment of vulvovaginal candidiasis (yeast infections).
## Adult Dosing
* **100 mg vaginal suppository:** Insert 1 suppository vaginally at bedtime for 7 consecutive days.
* **200 mg vaginal suppository:** Insert 1 suppository vaginally at bedtime for 3 consecutive days.
* **1% vaginal cream (10 g per applicator):** Insert 1 applicatorful (5g) vaginally at bedtime for 7 consecutive days.
* **4% vaginal cream (5 g per applicator):** Insert 1 applicatorful (5g) vaginally at bedtime for 3 consecutive days.
*Note: Specific duration of therapy may vary based on product labeling and clinical judgment. Some products may offer a single-dose regimen.*
## Pediatric Dosing
* Safety and efficacy in pediatric patients younger than 12 years have not been established.
* For patients 12 years and older, use adult dosing.
## Dose Adjustments
* No specific dose adjustments are recommended for renal or hepatic impairment.
## Contraindications
* Hypersensitivity to miconazole or any component of the formulation.
## Adverse Effects
* **Common:** Vaginal burning, itching, irritation, abdominal cramps, pelvic pain.
* **Less Common:** Headache, rash.
## Key Drug Interactions
* **Warfarin:** Miconazole (particularly oral and topical formulations, though vaginal has lower systemic absorption) can inhibit CYP2C9, increasing warfarin levels and the risk of bleeding. Monitor INR closely. The risk with vaginal miconazole is generally considered low but should not be entirely disregarded, especially with prolonged or widespread use.
* **CYP3A4 substrates:** Miconazole can inhibit CYP3A4. While systemic absorption from vaginal miconazole is minimal, caution is advised with concomitant use of highly dependent CYP3A4 substrates (e.g., certain statins, calcium channel blockers, benzodiazepines) due to theoretical risk.
## Monitoring
* Monitor for signs of vaginal irritation or allergic reaction.
* If using concomitantly with warfarin, monitor INR.
## Clinical Pearls
* Complete the full course of therapy, even if symptoms improve before completion.
* Avoid sexual intercourse during treatment.
* Consider alternative antifungal therapy if symptoms do not improve after completing the course, or if recurrence is frequent.
* The 1% cream and 100 mg suppository regimens are generally preferred for longer duration and potentially better cure rates in uncomplicated infections.
* Vaginal miconazole products are generally considered safe during pregnancy after the first trimester for yeast infections, but consultation with a healthcare provider is recommended.
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*Disclaimer: This information is intended for healthcare professionals. It is essential to consult the most current prescribing information and relevant clinical guidelines before making any treatment decisions. This information does not replace professional medical advice.*
