Cladribine is still nominally viable in the US. Merck resubmitted the Cladribine NDA on 6/8/10 (#msg-51012919) after having received a Refusal to File letter in Nov 2009 in response to the original NDA submission (#msg-44040202). Merck refused to divulge what the problem was, leading to speculation that the FDA had insisted on another phase-3 trial (#msg-46949655). If the FDA takes 6 months to act on the resubmission, a decision should come by early December.