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 HP 44 54 511 V361 ER 4 MYLAN 182 MUTUAL 401 2876 logo YF NEURONTIN 600 RP 700 T 109 145 B 586 or B 587 SLOW- MAG 277 b1010 RG ML 5 ME RE12 P-D GELUSIL 034 Zofran 4212 logo and 5029 CGPI BN4 15 B4 ALKA SELTZER and logo L 298 IMITREX 100 C17 MP 35 88 E 757 268/40 G 372 2 U37 10 300 L437 Relagesic