Aprepitant Capsule is a medication used for the treatment of nausea and vomiting. The medication works by blocking the receptors that cause nausea and vomiting, which leads to a decrease in symptoms. Aprepitant Capsule is a white, oval shaped capsule that contains a white powder inside. The medication is also found in tablet form, which is a blue and white capsule that contains a blue, round tablet inside.