As a recent synovial sarcoma survivor, I can attest to the powerful anti-nausea properties of ativan/benzodiazepines. I had mets in my lung so the treatment was rather wicked and aggressive (dose dense, every two weeks for 28 weeks). While in the hospital, I received 2 mg/m^2 ifex/mesna infusion daily for 7 days. By the 3rd day, the room spinning would become uncontrollable. 1-2 mg of ativan stopped that better than anzemet or zofran ever did. Also, when at home and experiencing hardcore breakthrough nausea, a bar or two of xanax or a marijuana cigarette worked much better than compazine. It may depend on the type of nausea...mine was not a retching kind but a dizziness and room spinning, leading to a retching. Once the room stopped spinning and I calmed down (with xanax, pot or ativan), I was fine.