Itrapid 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 fungi, including aspergillosis, histoplasmosis, blastomycosis, and onychomycosis. Itraconazole exerts its antifungal effect by inhibiting the cytochrome P450-dependent enzyme lanosterol 14-α-demethylase, which is essential for the conversion of lanosterol to ergosterol, a critical component of fungal cell membranes. This disruption leads to increased membrane permeability and ultimately fungal cell death. Itrapid 100 Capsule is administered orally, with absorption enhanced when taken with food. The dosage and duration of therapy depend on the type and severity of the infection, as well as patient-specific factors such as hepatic function. Common adverse effects include gastrointestinal disturbances, headache, dizziness, and rash. Caution is advised in patients with liver impairment or congestive heart failure, and potential drug interactions should be carefully reviewed due to itraconazole’s effect on cytochrome P450 enzymes. Regular monitoring of liver function tests is recommended during prolonged therapy. Itrapid 100 Capsule should be used under medical supervision to ensure efficacy and safety.