Itraclar 100mg Capsule contains Itraconazole, a broad-spectrum triazole antifungal agent indicated for the treatment of various fungal infections. Itraconazole exerts its antifungal activity by inhibiting the cytochrome P450-dependent enzyme lanosterol 14-α-demethylase, which is essential for the synthesis of ergosterol, a critical component of fungal cell membranes. This disruption leads to increased membrane permeability and ultimately fungal cell death. Itraclar is effective against a wide range of pathogenic fungi, including dermatophytes, yeasts such as Candida species, and molds like Aspergillus species. It is commonly prescribed for conditions such as onychomycosis, histoplasmosis, blastomycosis, aspergillosis, and other systemic and superficial mycoses. The capsule formulation allows for oral administration, facilitating convenient dosing. Itraconazole is generally well tolerated; however, it may cause side effects including gastrointestinal disturbances, headache, dizziness, and, rarely, hepatotoxicity. Caution is advised in patients with liver impairment or congestive heart failure. Drug interactions are notable due to its inhibition of cytochrome P450 enzymes, necessitating careful review of concomitant medications. Itraclar should be used under medical supervision with appropriate monitoring to ensure efficacy and safety.