Pill Identification by Imprints: M 13 Home Pill Identification by Imprints: M 13 2 results TOLBUTAMIDE 500 MG TABLET Side 1: M 13 Color: White Side 2: Shape: Round TOLBUTAMIDE 500 MG TABLET Side 1: M 13 Color: White Side 2: Shape: Round Other Popular Drug Imprint M136 S 901 874 4 Mini E 132 54 840 Pepto Bismol M D11 GP C 23 477 179 K 400 BP 813 PFIZER 396 WAR 5 Y+ or M+ AVA 4214 CT H 146 Ortho or Ortho 535 O 250 or O-M I 1 logo and 4444 SPD417 NORTRIPTYLINE C3 V 3 JMI D16 MYLAN 772 1453 S 225 GG 21 Compoz FP 722 N020 H 103 M 755