Americans spent more than $23 billion last year for cancer drugs, more than we paid for prescriptions to treat anything else. But many oncologists are starting to question what we are getting in return for thatbill, whether the war on cancer has become too much of a race to produce the next blockbuster. Lowell Schnipper, the Theodore W. and Evelyn G. Berenson Professor of Medicine at B eth Israel Deaconess Medical Center, is quoted.