This study reviewed clinical trials comparing a newer antifungal drug called isavuconazole with other commonly used antifungal medications for treating serious fungal infections, particularly in patients with weakened immune systems. The research found that isavuconazole works just as well as other antifungal drugs but may have fewer side effects, especially liver problems. When compared directly with voriconazole, isavuconazole showed fewer drug-related side effects overall, making it a good alternative option for patients who cannot tolerate other antifungal treatments.