Is It Safe To Stop Latuda Suddenly?

HI. MY SON HAS AUTISM AND HAS BEEN ON Risperdal FOR 5 YEARS. WE ADDED LATUDA 3 MONTHS AGO TO TRY TO CONTROL THE OCD. WE (FAMILY AND TEACHERS) THINK IT IS NOT HELPING AND IT IS CAUSING MORE OCD BEHAVIOR. WE DIDN T GIVE HIM HIS DOSE (20MG) TODAY AT DINNER AND ARE THINKING OF STOPPING ALTOGETHER. CAN WE DO THIS COLD TURKEY? YYYY@YYYY