In the mid-1990s, Pfizer developed Trovafloxacin Mesylate, an antibiotic that is also known by its brand name as "Trovan". Pfizer projected that its total annual sales could exceed $ 1 billion a year. (Compl. P 96.) Beginning in 1996, Pfizer conducted the largest drug testing program ever undertaken by enrolling thousands of participants in clinical tests. (Compl. P 97.) However, prior animal testing indicated that Trovan might cause significant side effects in children such as joint disease, abnormal cartilage growth (osteochondrosis, a disease resulting in bone deformation) and liver damage. (Compl. PP 98-99.)