 After the Reaction, Vadier was transported together with Jacques Nicolas Billaud-Varenne and Jean-Marie Collot d'Herbois to French Guiana, but was amnestied by the Directory, and later, in the April 1796, took part in the failed "Conspiracy of the Equals".Acquitted by the courts, he nonetheless remained in prison in Cherbourg until 1799.Placed under house arrest in Paris, a deputy during Napoleon's Hundred Days, he was compelled to go into exile in Brussels after the Second Restoration, and died in Brussels.