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 M 1 306 BI 7 H7.5 325 974 ZOLOFT GG 40 5382 784 G71 54 299 I 24 370 MYLAN 3005 KC E7 logo and 3116 AA 79 TL515 logo and 2890 PH014 44 428 VALTREX 500 mg logo and A1 RI20 MYLAN 2302 245 381 b 4827 K 111 K 40 S 226 BRX 0.25 K75 669 rfx M 575 AA 73 CL27 Benadryl