The most common adverse reactions reported at a greater incidence in patients treated with the aprepitant regimen than with standard therapy in patients receiving highly emetogenic chemotherapy were: hiccups (4.6% versus 2.9%), asthenia/ fatigue (2.9% versus 1.6%), alanine aminotransferase (ALT) increased (2.8% versus 1.5%), constipation (2.2% versus 2.0%), headache (2.2% versus 1.8%), and anorexia (2.0% versus 0.5%).