Drug,US,Canada,Savings Cardizem,131,83,37 Celebrex,136,72,47 Cipro,374,219,41 Pravachol,370,166,55 Premarin,61,17,72 Prevacid,252,214,15 Prozac,263,112,57 Tamoxifen,349,50,86 Vioxx,243,134,45 Zantac,166,42,75 Zocor,365,200,45 Zoloft,216,105,51