Pill Identification by Imprints: 4221 Home Pill Identification by Imprints: 4221 1 result KOMBIGLYZE XR 5-500 MG TABLET Side 1: 5/500 Color: Light Brown Side 2: 4221 Shape: Oblong Other Popular Drug Imprint 2122 D D ABRS-123 WPI 3 266/18 PROVERA 2.5 cor 212 TV 4 u50 E 415 EP L116 deplin E 1 Durlaza IG274 KC M20 GPI LB E20 OXC 600 339 54 661 TARO 16 760 S 5 BL 50 GG 168 E 48 L181 Butrans 20mcg/hour 166 G 21 I 50 G 4910 90 V223 T598 295 PA 916 CCC 250