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 GX EF3 par 222 YB AR 50 Northera AAA 1031 L48 PARLODEL 5 mg T2 200 93/12 44 404 CL51 516 FS3 Dulcolax CZ 100 RP 700 10 mg 332 S20 Y 16 L355 LAMICTAL XR 25 or 50 APO TI-2 M T12 LC 450 RI b1011 SZ I 34 M 137 J1 E 5 44-502 219 T P RI18 N T4 G-X G 786