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 SLOW- MAG MP 201 or MP 802 AMOX 250 86 PFD 874 4 RSV 5 W 1035 APTALIS 15 ML 1 BCL 5 REV E 74 Z16 5013 V XL184 20 mg A 48 EP 905 1073 10/1000 ALDACTONE 100 A CS 537 G 0028 1453 93 752 BNVA M 1 PROSCAR M 177 54 524 FO IDT M15 232 or 294 or 233 MP 114 153 logo and 14 500 A 40 E50 logo and 012