I do not think that means what you think it means

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From a nice blogpost by political writer Josh Green on the late Jack Klugman's advocacy for the Orphan Drug Act (emphasis mine):

Hatch, too, finally relented. Thanks to Klugman, the Waxman-Hatch Orphan Drug Act became law in 1983. In an ending Hollywood might have scripted, it has been a remarkable success. The FDA has approved more than 300 orphan drugs, with 1,100 more under development. One of the first developed under the law was AZT, the early AIDS treatment. Two years later, Congress expanded the law to include biological and chemical drugs, which helped spur the biotech industry. 

Rurrr? I assume he means "biological drugs" or "biomolecules". Ah, well, can't win them all.