Before August 16, 2021, REVLIMID REMS prescribers, patients, and pharmacies will continue using REVLIMID REMS to complete REMS activities.; Starting August 16, 2021, Lenalidomide REMS will replace REVLIMID REMS and be used to complete REMS activities.; REVLIMID REMS prescribers and patients will be able to participate in the Lenalidomide REMS without further actions..