OPEN MINDS The Behavioral Health Industry Analyst Industry News Two psychotropic drugs, Xanax and Valium, rank 9th and 15th, respectively, in the top 25 prescription drugs in the United States. The drugs were ranked by estimated percentage of the 1988 U.S. market dollar volume in Medical Advertising News 33rd Annual Prescription. Xanax, an anti-anxiety drug manufactured by Upjohn Company, had 1.31% of the dollars in the U.S. prescription market and represented 1.04% of all U.S. prescriptions. Estimated 1988 worldwide sales of Xanax were . . .