Itralist 100 Capsule contains Itraconazole 100 mg, a broad-spectrum antifungal agent belonging to the triazole class. It is indicated for the treatment of various systemic and superficial fungal infections caused by susceptible strains of fungi, including dermatophytes, yeasts, and molds. Itraconazole exerts its antifungal effect by inhibiting the cytochrome P450-dependent enzyme lanosterol 14-α-demethylase, which is essential for ergosterol synthesis, a critical component of fungal cell membranes. Disruption of ergosterol synthesis results in increased membrane permeability and ultimately fungal cell death. Itralist 100 Capsule is prescribed for conditions such as onychomycosis, histoplasmosis, blastomycosis, aspergillosis, and candidiasis. The medication is administered orally, with dosing regimens tailored according to the severity and type of infection. It is important to take Itralist with food to enhance absorption. Common adverse effects include gastrointestinal disturbances, headache, and rash, while rare but serious side effects may involve hepatotoxicity and cardiac issues such as negative inotropic effects. Itraconazole is contraindicated in patients with hypersensitivity to the drug and should be used cautiously in those with liver impairment or congestive heart failure. Drug interactions are significant due to its effect on cytochrome P450 enzymes; therefore, concomitant use with certain medications requires careful monitoring.