Vanda Wants Restriction on Generic Fanapt
Vanda Pharmaceuticals is asking FDA not to approve an ANDA referencing its Fanapt (iloperidone) until expiration of the three-year exclusivity covering changes made to the Fanapt labeling for which the company says that a clinical study relating to maintenance treatment was essential. Fanapt is approved for treating schizophrenia in adults. The petition says that FDA conditioned approval on a post-marketing commitment to study the drug for maintenance treatment.
Vanda says it satisfied its commitment through the REPRIEVE study that demonstrated that Fanept is more effective than placebo in preventing or delaying relapse when administered for longer than six weeks.
“REPRIEVE thus provided valuable new information about the use of Fanapt for treating schizophrenia,” the petition says. “FDA recently granted three-year exclusivity to Fanapt for labeling changes resulting from REPRIEVE findings.” It says that because the study was essential to the approval of labeling changes adding information about maintenance treatment and removing the previous limited information about maintenance treatment, both are protected by three-year exclusivity and it is not possible for generic products to bear approvable labeling.