Pill Identification by Imprints: 54 420 Home Pill Identification by Imprints: 54 420 2 results MERCAPTOPURINE 50 MG TABLET Side 1: 54 420 Color: Pale Yellow Side 2: Shape: Round MERCAPTOPURINE 50 MG TABLET Side 1: 54 420 Color: Pale Yellow Side 2: Shape: Round Other Popular Drug Imprint IP 117 L114 TZ 1 U-S 7P5 AA 16 RX 504 SDF 20 ATON 705 PH 033 5 VALIUM 54 892 013 b 777 INCY GG 771 AS 400 ALDACTAZIDE 25 MP 447 alza 27 G 342 ESL600 SEARLE TEGRETOL L 202 logo and 5034 1018 51 LE 500 265/10 P 300 TI CL92 DAN 5560 P-Fe NL 770 CALAN 120 KU 260 NT or EP or E AC39