Cipro has been given to more than 100 million people since 1987. Last year in July, Cipro became and still remains the only drug approved by the FDA for inhalational anthrax.
Penicillin the number one antibiotic in the world, has actually treated more anthrax than Cipro, but because the drug is now not owned by any one drug company, none brought it to the FDA for approval. Merck provides guidelines for penicillin therapy for both types of anthrax, based upon years of history of treatment on humans.
The line I quoted in my prior response came from the CDC not the FDA per the article. My main question is why the CDC is advising not using antibiotics unless a positive test for the infection has occurred, yet ten thousand people are being treated with Cipro, et al, for potential anthrax exposure without any positive test?