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 MSD 740 LCI 1329 WPI KU 181 AN 617 93 670 APO T300 R 100 S 226 H 107 E 223 NoDoz LCI 1311 P 10 21 523 ap 107 P0.5 C6 SEA RLE 10 41 RX126 AN 642 4008 93 711 P-112 94 K 8 ZA 66 HYD 30 n 573 MP 201 or MP 802 6 mg CLARITIN-D 24 HOUR E 53 logo and 076 F52 42 16 V O20 93 7385 Lilly