"This is permanent damage, it is irreversible," said Brown.
Counterfeit Gentamicin was blamed in at least 66 deaths and hundreds of severe reactions. And since the first CBS News report last year, other batches of fake drugs have turned up around the country. One of them is Serostim.
Serostim is used by thousands of AIDS patients to prevent so-called "wasting" or deterioration of their bodies.
The fakes have turned up in at least seven states California, Ohio, Kentucky, Michigan, New Jersey, Florida and Missouri in recent months causing the maker of the real Serostim, Serono, to issue an all points bulletin.
"Our patients called us and told us that the products just didn't look right to them. There was a difference, and they weren't quite sure what it was," said Serono President Tom Lang.
Dr. Bruce Rashbaum prescribes Serostim for some of his patients, and was alarmed when he heard that a fake was on the market.
"It's a very scary world out there and we just can't really trust everything that we see at face value," he said.
And it's not just counterfeit Serotstim. Two bogus hormone replacement drugs have also turned up Neupogen and Nutropin AQ.
The companies that make the real thing have posted alerts on their Web sites.
Authorities say the motivation is pretty obvious they're all expensive drugs. Serostim for example costs a whopping seven thousand dollars a month. A cheap fake generates more profit.
"I think we will see more of this, sadly," said Dr. Rashbaum.
The FDA, once accused of being too complacent about counterfeit drugs has devoted new attention to the problem, opening a criminal investigation in the most recent cases to try to find out who's to blame.
In the hunt for counterfeiters, the trail often runs cold. But prosecutors did get their man in one case a New York rabbi who was counterfeiting fertility drugs and selling them to posh New York pharmacies. That story Thursday in Part 2 of CBS News Correspondent Sharyl Attkisson's investigation.
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