Pill Identification by Imprints: A538 Home Pill Identification by Imprints: A538 2 results GUANFACINE HCL ER 4 MG TABLET Side 1: A538 Color: Blue Side 2: 4 mg Shape: Oblong GUANFACINE HCL ER 4 MG TABLET Side 1: A538 Color: Blue Side 2: 4 mg Shape: Oblong Other Popular Drug Imprint EP 136 AN248 H 009 SD 9 38 M31 93 834 1207 BMS 200 mg 240 Zzz ZANTAC 300 THIS END UP EVT ML 91 G 4960 T0101 PRECOSE 50 CPL 3032 M 722 321 1326 E 25 EP 50 SZ 656 19 G RD27 EK 25 KU 262 CNG1 T 47 SEROQUEL 100 510 MX9 METHADOSE 40 54 794 M L21 Lilly 3230 LAMICTAL XR 50 N 40