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# Miconazole Vaginal
## Overview
Miconazole is an imidazole antifungal agent.
## Primary Indications
Treatment of vulvovaginal candidiasis (yeast infections).
## Adult Dosing
* **1% vaginal cream:** Insert one applicatorful (approximately 5g) intravaginally at bedtime for 7 days.
* **2% vaginal cream:** Insert one applicatorful (approximately 5g) intravaginally at bedtime for 3 days.
* **100 mg vaginal suppositories:** Insert one suppository intravaginally at bedtime for 7 days.
* **200 mg vaginal suppositories:** Insert one suppository intravaginally at bedtime for 3 days.
* **150 mg vaginal suppositories:** Insert one suppository intravaginally at bedtime as a single dose.
The choice of regimen depends on patient preference and severity of symptoms.
## Pediatric Dosing
Dosing for pediatric patients is not well established. Use with caution and consider consultation with a pediatrician. Generally, the same adult formulations and dosages are used in adolescents.
## Dose Adjustments
No dose adjustments are typically needed for renal or hepatic impairment for vaginal administration.
## Contraindications
* Hypersensitivity to miconazole or any component of the formulation.
## Adverse Effects
* **Common:** Vulvovaginal burning, itching, irritation. Lower abdominal cramping.
* **Less Common:** Headache.
## Key Drug Interactions
* **Warfarin:** Miconazole, particularly when used systemically, can inhibit CYP2C9, leading to increased warfarin levels and bleeding risk. While vaginal absorption is minimal, caution is advised, especially with prolonged use or in patients with compromised vaginal mucosa. Monitor INR closely.
* **CYP3A4 Substrates:** Miconazole is a potent inhibitor of CYP3A4. Although systemic absorption is limited with vaginal administration, concurrent use of drugs metabolized by CYP3A4 (e.g., certain calcium channel blockers, benzodiazepines, statins) warrants caution due to the theoretical risk of increased systemic concentrations of these agents.
## Monitoring
* Assess for symptom relief (itching, burning, discharge).
* Monitor for local irritation or allergic reactions.
## Clinical Pearls
* Complete the full course of therapy even if symptoms improve earlier.
* Avoid intercourse during treatment as the medication can weaken latex condoms and diaphragms.
* Use sanitary pads to prevent staining of clothing.
* If symptoms do not improve after completing treatment, or if they worsen, discontinue use and consult a healthcare provider.
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*Disclaimer: This information is intended for healthcare professionals and does not replace professional medical advice. Always verify current prescribing information and guidelines before making clinical decisions.*
