Pill Identification by Imprints: KEY 74 Home Pill Identification by Imprints: KEY 74 1 result GUANIDINE HCL 125 MG TABLET Side 1: KEY 74 Color: White Side 2: Shape: Round Other Popular Drug Imprint 976 T0101 T1 MYLAN 199 RU40 RX 537 RD05 M A12 SX I 27 K7 200 M 447 AA 99 972 M T15 PAC20 WPI 867 n 351 R8 MYLAN 5420 P107 557 logo and 40 E 2 AN 351 ML 36 MYLAN MT 14 LILLY 4420 300 ER M C51 343 SEARLE 1001 1 83 54 107 LDK 150MG logo and 0.5 T504 CLA500 54 922