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 logo and 201 H568 NL 710 R720 GE 320 7.5/1000 G453 TCL 003 A21 216 836 RDY LCI 1338 G 254 C5 or C2 E 146 Sandoz P 33 MP 277 WPI 3771 LP79 44 69 C1 or C2 or C3 or P GC5 I 10 par 029 44-526 HP 3 ONE A DAY and logo BR 174 93 757 RX125 150 XL 161 EP 50 XR 50 CP 406 Z 5 24 VASO 10