This photo provided by Office of Public Affairs, FDA shows a counterfeit version of the best-selling cancer drug Avastin. The Food and Drug Administration is warning doctors that a second counterfeit version of the best-selling cancer drug Avastin has been found in the U.S., packaged as the Turkish brand of the medication. The FDA said late Tuesday, April 3, 2012, that the counterfeits do not contain the active ingredient in Avastin, which is used to treat cancers of the colon, lung, kidney and brain. The vials are packaged as Altuzan, the Turkish version of Avastin that is not approved for use in the U.S. The agency says any packages or vials labeled with the lot number B6021 should be considered counterfeit. (AP Photo/Office of Public Affairs, FDA )