Pill Identification by Imprints: 531 Home Pill Identification by Imprints: 531 4 results METHYLPHENIDATE 5 MG TABLET Side 1: MD Color: Yellow Side 2: 531 Shape: Round TRAMADOL ER 100 MG TABLET Side 1: 531 Color: White Side 2: Shape: Round TRAMADOL ER 100 MG TABLET Side 1: 531 Color: White Side 2: Shape: Round TRAMADOL HCL ER 100 MG TABLET Side 1: 531 Color: White Side 2: Shape: Round Other Popular Drug Imprint ZC 25 USB 001 SLC 223 CYP 197 MVC 75 54 974 44 113 ELN 60 P-D GELUSIL 034 CL 205 GG 263 GG 260 PAD 0181 WPI 100 IMITREX 1122 1122 568 Y 46 GG 26 RTG-200 cor 130 MYLAN 4415 AN 1 GG 264 ED UB 031 2 59 B855 VALTREX 1 gram N 11 ML 1 BEACH P201 Northera 93 3107 1182 44 546 AHI T 20 WATSON 607