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 111 EP 116 ZA-12 C47 P 5 GS FC2 E550 M 753 APO 019 41 GP logo and D2 1000M 378 CM3 WPI 3659 AN 545 1346 656 MYLAN 6410 N A PEPCID L227 HP65 K2 973 HH210 DMT logo and 2577 GAVISCON ESR 1174 G73 U 168 E 4 CL 32 OMEPRAZOLE 20mg M 522 I 50 M 447 logo and NK ACN 4 C223